Cambridge Audio Schematics & Service Manuals
Issue Date: 8th August 2007 SERVICE MANUAL 740A SPECIFICATIONS: Power Output THD (unweighted) Frequency Response S/N Ratio (ref 1W/8 Ohms) Input Impedances Power Amp Damping Factor Max Power Consumption Minimum Power Consumption Bass & Treble Controls Dimensions Weight 100W RMS into 8 Ohms 150W RMS into 4 Ohms < 0.001% 1 kHz At 80% of rated power < 0.01% 20 Hz 20 kHz At 80% of rated power 10 Hz 50 kHz +/- 1 dB > 96 dB Inputs 1-6 47 kOhm > 110 at 1 kHz 750W Active (no signal) 45W Standby 6W Shelving Type Max bass boost/cut +/-10 dB at 10 Hz Max treble boost/cut +/- 7.5 dB at 20 kHz 115 x 430 x 350mm (4.5 x 16.9 x 13.8") 10.7kg (23.5Lbs) Gallery Court Hankey Place London SE1 4BB UK Tel: +44 (0)20 7940 2200 Fax: +44 (0)20 7940 2233 AP22267/1 1 740A SERVICE MANUAL TABLE OF CONTENTS Safety Precautions & Important Notes Exploded Diagrams Exploded Diagram Parts List Front Panel PCB Schematic (Tone Control) Front Panel PCB Schematic (Microcontroller & LCD) Front Panel PCB Layout (Top Side) Front Panel PCB Layout (Bottom Side) Front Panel PCB BOM Preamp PCB Schematic (Tone Control) Preamp PCB Schematic (Protection Circuitry) Preamp PCB Schematic (Power Supply) Preamp PCB Schematic (Headphone Driver) Preamp PCB Schematic (Buffers & Switches) Preamp PCB Board Layout (Top Side) Preamp PCB Board Layout (Bottom Side) Preamp PCB BOM Amplifier Schematic (Speaker PCB) Amplifier Schematic (Right Channel) Amplifier Schematic (Left Channel) Amplifier Schematic (Protection) Amplifier Schematic (Power Supply) Amplifier PCB Board Layout (Top Side) Amplifier PCB Board Layout (Bottom Side) Amplifier PCB BOM Abus Schematic Abus PCB Board Layout (Top Side) Abus PCB Board Layout (Bottom Side) Abus PCB BOM Mains Schematic (Mains) Mains PCB Board Layout (Top Side) Mains PCB Board Layout (Bottom Side) Mains PCB BOM 4 5-8 9 10 11 12 13 14-15 16 17 18 19 20 21 22 23-26 27 28 29 30 31 32 33 34-36 37 38 39 40-41 42 43 44 2 45 IC Pin Layout Details____________________________________________ 46-51 Service Mode Instructions________________________________________52 Procedure to Upgrade Software___________________________________ 53 Kanda PIC Hand Held Programmer Modification Instructions____________54-58 Revised Front Panel Schematicto improve encoder reliability: (see Service Bulletin TNBC-0035)__________________________________ 59-60 SAFETY PRECAUTIONS & IMPORTANT NOTES 1. Check that the rear of the product indicates the correct supply voltage for your area. 2. The lighting flash with the arrowhead within an equilateral triangle is intended to alert the user or service agent to the presence of dangerous voltages within the product enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. 3. The exclamation point within an equilateral triangle is intended to alert the user or service agent to the presence of important operating and maintenance (Servicing) instructions in the literature accompanying the appliance. 4. This product complies with EEC Low Voltage (73/23/EEC) and Electromagnetic Compatibility (89/336/EEC) Directives when used and serviced in accordance with this manual. For continued compliance all components marked safety and EMC critical must only be replaced by Cambridge Audio approved parts. 5. Any unauthorised design alterations or additions will void the manufacturer's warranty; furthermore the manufacturer cannot accept responsibility for personal injury or property damage resulting therefrom. 6. When servicing, care should be taken to observe the original routing and dressing of the leads and it should be confirmed that they have been returned to normal after re-assembly. Notes on chip component replacement Never reuse a component that has been removed from a PCB Notice that the minus side of a tantalum capacitor may be damaged by heat COPYRIGHT NOTICE. © 2007 Audio Partnership PLC. All rights reserved. Cambridge Audio and Azur are registered trademarks for Audio Partnership PLC. This document may not be reproduced, distributed, transmitted, displayed, published, or broadcast without the express written prior permission of Audio Partnership PLC. Alteration or removal of any trademark, copyright, or other notice from this content is prohibited. Information provided in this document is provided solely for the use of official service agents in repairing and servicing Audio Partnership PLC products. 4 Cambridge Audio Azur 740A Amplifier 2 3 15 3 To enhance viewing, please print to A3 Exploded Diagram (Complete Unit) 5 10 8 Cambridge Audio Azur 740A Amplifier 13 9 1 16 To enhance viewing, please print to A3 Exploded Diagram (Chassis Assembley) 6 Cambridge Audio Azur 740A Amplifier 5 6 7 4 To enhance viewing, please print to A3 Exploded Diagram (Front Panel Assembley) 7 Cambridge Audio Azur 740A Amplifier 11 12 14 To enhance viewing, please print to A3 Exploded Diagram (Rear Panel Assembley) 8 Cambridge Audio Azur 740A Amplifier Drawing Ref Part N umber Factory Designation 1 PY1237 3200-063073E000 - PY1242 3200-063074E000 2 PY1338 6574-150018E000-02 - PY1339 6574-150018E000-01 3 PY1340 6574-150020E000-02 - PY1341 6574-150020E000-01 4 PY1342 8574-015010E301 - PY1343 8574-015020E301 5 PY1344 6574-150029E000A01 - PY1345 6574-150029E000-01 6 PY1346 9474-015000E041 7 PY1138 2409-010200E001 8 PY1347 9474-015000E091 9 PY1348 9474-015000E001 10 PY1349 9474-015000E101 11 PY1350 9474-015000E331 12 PY1351 2404-040100E001 13 PY1352 9474-015000E341 14 PY1322 2333-008919E003 15 PY1165 9805-084000E001 16 PY1122 6074-150004E000 - PY1125 6074-150004E000A01 D escr iption Azur-740A 230V Transformer TI-063073D For EU Version Azur-740A 110V Transformer For CU (USA) Version Azur 740A Top Panel-S (With Painted) Azur 740A Top Panel-B (With Painted) Azur-740A Side Panel-S (With Painted) Azur-740A Side Panel-B (With Painted) Azur-740A Front Panel-S Assy Rev A (Metal plus PCB) Azur-740A Front Panel-B Assy Rev A Azur-740A Front Panel Artwork-S (AP200931) (metal) Azur-740A Front Panel Artwork-B Azur-740A Control PCBA Rev A Rotary Encoder Switch REB161(9*7)PVB20FHINB1-2-24E Azur-740A Amp Power PCBA (AP19797/A) Rev A <T Type> Azur-740A Protection Circuitry PCB-A Assy Rev A Azur-740A Protection Circuitry PCB-B Assy Rev A Azur-740A A-Bus Hub PCBA REV A Piano DIP Switch 4P DPL-04K Series Azur-740A Input PCBA Rev A <T-Type Resistor> WP8-22 8 Way SPK Terminal 4Blk/4Red Gold Plating for 740A Azur-740/840/A/C Remote Control Assy Rev A Plastic foot black Plastic foot silver Exploded Diagram Parts List 9 Cambridge Audio Azur 740A Amplifier CN6 6 Way Right Angle Header 1 2 3 4 5 6 RC RBB RTB RA R RA RC RTB RIGHT LK38 24 AWG +15V -15V CN5 8 R 7 6 SHIELD_SUPPLY RA 5 4 3 2 1 8 Way Right Angle Header L LA RBB C101 1.5nF 63V Met. Polyester R103 4K7 1/4W Metal Film RC LC LTB C201 1.5nF 63V Met. Polyester LEFT R203 4K7 1/4W Metal Film LBB LA LC LC LBB LTB LA 1 2 3 4 5 6 L CN7 6 Way Right Angle Header -15V C104 CA2 1 2 3 4 5 6 47nF 63V Met. Polyester R C103 10pF 50V NP0 Ceramic See AP20043/1 6 Way to 4 Way Screened Audio cable U100:B NE5532P Audio Op Amp 6 7 5 U100:A 4 NE5532P Audio Op Amp 3 R106 1 2 2K2 R R107 2K2 1/4W Metal Film 1/4W Metal Film C107 8 R C106 10pF 50V NP0 Ceramic 47nF 63V Met. Polyester +15V R -15V C204 LK39 24 AWG R R LK40 47nF 63V Met. Polyester L C203 10pF 50V NP0 Ceramic L 6 5 24 AWG U200:B L NE5532P Audio Op Amp 7 U200:A 4 NE5532P L R207 Audio Op Amp 3 R206 1 2 2k2 1/4W Metal Film 2K2 1/4W Metal Film C207 8 L C206 10pF 50V NP0 Ceramic L 47nF 63V Met. Polyester +15V CA1 1 2 3 4 5 6 See AP20044/1 6 Way to 5 Way Screened Audio cable 4 Way CN10 Straight Header 1 2 3 4 1 2 3 4 R18 1K1 1/8W Metal Film R20 1K1 1/8W Metal Film R24 R23 2K2 1/8W Metal Film 2K2 1/8W Metal Film SHIELD_R2 CN4 4 3 2 1 4 Way Right Angle Header SHIELD_L2 LK37 24 AWG VR1:A 5k Push Action Linear Pot VR2:B 5k Push Action Linear Pot C10 680nF 63V Met. Polyester VR1:B 5k Push Action Linear Pot C18 680nF 63V Met. Polyester 5k VR2:A Push Action Linear Pot R21 1K1 1/8W Metal Film R22 1K1 1/8W Metal Film R25 2K2 1/8W Metal Film LK1 24 AWG R26 2K2 1/8W Metal Film 1 2 3 4 5 1 2 3 4 5 GUARD CN8 5 Way Straight Header To enhance viewing, please print to A3 AP19784/3 Front Panel Circuit Diagram (Tone Control) 10 Cambridge Audio Azur 740A Amplifier Vss 1 Vdd 2 Vo 3 RS 4 R/W 5 E 6 D0 7 D1 8 D2 9 D3 10 D4 11 D5 12 D6 13 D7 14 LED A 15 LED K 16 +5V +5V LK7 L2K4 A1W4G 24 AWG LK25 24LAKW3G6 24LAKW1G2 LK424 AWG 24 AWG +5V +5V LK11 24LAKW3G2 24 AWG +5V +5V LK3 2L4KA3W1G 24 AWG CN11 1 2 3 4 5 6 6 Way +5V PGC PGD MCLR +5V COL 1 SW1 COL 2 SW2 KPT-1105A INPUT 1 SW4 KPT-1105A INPUT 2 1. SW5 ROW 2 KPT-1105A INPUT 4 SW7 LK15 KPT-1105A INPUT 5 SW8 LCD STR. LK24 LK13 LCD STR 24 AWG 24 AWG +5V LCD DECOUPLE R27 47K 1/4W Metal Film +5V R29 47K 1/4W Metal Film ROW 3 R30 47K 1/4W Metal Film ROW 4 KPT-1105A ON/STBY SW10 KPT-1105A DIRECT R19 100R 1/4W Metal Film C9 100nF 50V Mono Ceramic C4 100nF 50V Mono Ceramic C7 C22 10uF 16V 47nF 50V Electrolytic Ceramic LK35 24 AWG 1 CN1 2 1a 1 2a 2 U2 3a 3 4 4a 4 LK33 Q0 5 5a 5 LK34 Q1 6 6a 6 24 ALWKG30 7 Q2 Q3 7a 7 24 AWG 14 8a 8 Q4 24 AWG 13 Q5 15 16 12 Q6 2x8 Way 11 DIL Bottom Entry HeaLdKer26 Q7 LK29 LK27 24 AWG 9 QS 10 24 AWG LK28 QS 2 D 3 CLK 1 STB 15 OE VCC 16 8 GND 24 AWG 24 AWG M74HC4094B1R LCD DISPLAY CONN RS E LCD STR. +5V LK23 C5 24 AWG LK20 24 AWG 22pF 50V NP0 Ceramic C6 X1 Strip Cut Crystal 4MHz C11 10nF 50V Ceramic 22pF 50V NP0 Ceramic 1 R7 P5 10K 1/4W Metal Film 2. 24 AWG KPT-1105A SPEAKER LK9 L2K41A7WG 24 AWG 1 2 3 4 LCD STR 5 6 BRIGHT 7 ON/OFF 8 9 10 11 12 13 14 15 16 17 18 19 LK16 20 24 AWG +5V R12 220R 1/4W Metal Film ON/OFF R3 1K2 1/4W Metal Film Q1 BC337-25 NPN Signal D1 Blue Azur LED 1 CCW PR1 Multiturn 2 500R R1 R2 56R 56R CW 1/4W Metal Film 1/4W Metal Film POWER AMP RELAY LK18 24 AWG R11 10K 1/4W Metal Film Q3 BC337-25 NPN Signal R15 220R 1/4W Metal Film 3 2 16 1 15 LCD CONN ORIENTATION FROM FRONT R6 300R 1/4W Metal Film Q2 BC337-25 NPN Signal R5 10K 1/4W Metal Film BRIGHT R10 10K 1/4W Metal Film +5V TO POWER AMP PCB COL 3 SW3 KPT-1105A INPUT 3 SW6 R31 47K 1/4W Metal Film +5V SPEAKER B RELAY SPEAKER A RELAY PREAMP RELAY VI/SHORT CLIP DETECT MAINS FAIL DC OFFSET OVER TEMP CN9 1 2 3 4 5 6 7 8 9 10 RC5 BLOCK RC5 TX PHONES DETECT DIRECT RELAY PIC IR ON/OFF 1 2 3 4 5 6 LK2 24 AWG CN2 6 Way Right Angle Header TO PRE AMP PCB KPT-1105A TAPE MON SW9 KPT-1105A +5V +5V MODE 10K 10 Way Right Angle Header R32 100K 1/4W Metal Film CONTROL BUS IR VOLUME STROBE POWER AMP RELAY ABUS IR INPUT STROBE SERIAL DATA SERIAL CLOCK CN3 1 2 3 4 5 6 7 8 9 1/4W Metal Film 9 Way R4 MCLR LK6 U1 24 AWG MCLR/VPP RB7/PGD RA0/AN0 RB6/PGC RA1/AN1 RB5 RA2/AN2/Vref-/CVref RB4 RA3/AN3/VREF+ RB3/PGM RA4/T0CKI/C1OUT RB2 RA5/AN4/SS/C2OUT RB1 RE0/RD/AN5 RB0/INT RE1/WR/AN6 VDD RE2/CS/AN7 VSS VDD RD7/PSP7 VSS RD6/PSP6 OSC1/CLKIN RD5/PSP5 OSC2/CLKOUT RD4/PSP4 RCO/T1OSO/T1CKI RC7/RX/DT RC1/T1OSI/CCP2 RC6/TX/CK RC2/CCP1 RC5/SDO RC3/SCK/SCL RC4/SDI/SDA RD0/PSP0 RD3/PSP3 RD1/PSP1 RD2/PSP2 PGD 40 PGC 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 PIC16F877A-I/P PROGRAMMED_WITH=AP20357/x R28 R13 47K 1/8W Metal Film R39 1K 1/8W Metal Film D4 1N4148 Signal Diode DIRECT RELAY PHONES DETECT RC5 TX RC5 BLOCK OVER TEMP DC OFFSET MAINS FAIL CLIP DETECT CONTROL BUS IR +5V C1 100nF 50V Mono Ceramic 1K 1/8W Metal Film R16 VI/SHORT PREAMP RELAY SPEAKER A RELAY SPEAKER B RELAY SERIAL CLOCK C3 47nF 50V Ceramic +5V R17 SERIAL DATA 1K 1/8W Metal Film INPUT STROBE ABUS IR POWER AMP RELAY VOLUME STROBE R33 R36 10K 1/4W Metal Film 10K 1/4W Metal Film R34 C8 10uF 16V Electrolytic PIC IR ON/OFF Right Angle Header LK10 24 AWG R8 10R 1/4W Metal Film R9 10R 1/4W Metal Film C2 100nF 50V Mono Ceramic CONTROL BUS IR ROT1 1 A SW 2 B SW 3 C GND 4 FIX1 5 FIX2 Noble Rotary Encoder +5V R14 47R 1/4W Metal Film U3 47K 1/4W Metal Film U4:D LK8 13 10K 1/4W Metal Film U4:B 6 12 LK5 4 5 OPT 1 GND 2 +5V 3 TSOP34836 36KHz C16 100nF 50V Mono Ceramic C17 10uF 16V Electrolytic 11 24 AWG 24 AWG VCC=+5V +5V VCC=+5V M74HC02 M74HC02 GND=GND GND=GND P2 P3 P4 P1 LK22 U4:C +5V 9 10 8 VCC=+5V M74HC02 GND=GND U4:A 3 1 2 VCC=+5V M74HC02 GND=GND R35 47K 1/8W Metal Film C12 10nF 50V Ceramic C13 10nF 50V Ceramic C14 10nF 50V Ceramic C15 10nF 50V Ceramic CONTROL BUS IR 1 1 1 1 L24KA2W1G 24 AWG To enhance viewing, please print to AA3P19784/3 Front Panel Circuit Diagram (Microcontroller & LCD) 11 Cambridge Audio Azur 740A Amplifier To enhance viewing, please print to A3 AP19784/3 Front Panel Board Layout (Top Side) 12 Cambridge Audio Azur 740A Amplifier To enhance viewing, please print to A3 AP19784/3 Front Panel Board Layout (Bottom Side) 13 Cambridge Azur 740A Front Panel PCB Assembly BOM AP Part No Value Description/Type Qty Component Ident Type RESISTORS 10R 1/4W Metal Film 2 R8, R9 47R 1/4W Metal Film 1 R14 56R 1/4W Metal Film 2 R1, R2 100R 1/4W Metal Film 1 R19 220R 1/4W Metal Film 2 R12, R15 300R 1/4W Metal Film 1 R6 1K 1/8W Metal Film 3 R16, R17, R39 1K1 1/8W Metal Film 4 R18, R20-R22 1K2 1/4W Metal Film 1 R3 2K2 1/8W Metal Film 4 R23-R26 2K2 1/4W Metal Film 4 R106, R107, R206, R207 4K7 1/4W Metal Film 2 R103, R203 10K 1/4W Metal Film 8 R4, R5, R7, R10, R11, R33, R34, R36 47K 1/8W Metal Film 2 R13, R35 47K 1/4W Metal Film 5 R27-R31 100K 1/4W Metal Film 1 R32 RESISTORS VARIABLE 500R Multiturn 1 PR1 5k Push Action Linear Pot 2 VR1, VR2 CAPACITORS 10pF 50V NP0 Ceramic 4 C103, C107, C203, C207 22pF 50V NP0 Ceramic 2 C5, C6 1.5nF 63V Met. Polyester 2 C101, C201 10nF 50V Ceramic 5 C11-C15 47nF 50V Ceramic 2 C3, C22 47nF 63V Met. Polyester 4 C104, C106, C204, C206 100nF 50V Mono Ceramic 5 C1, C2, C4, C9, C16 680nF 63V 10uF 16V Met. Polyester Electrolytic 2 C10, C18 3 C7, C8, C17 CONNECTORS 2x8 Way DIL Bottom Entry Header 1 CN1 6 Way 9 Way 4 Way 8 Way 5 Way 10 Way 4 Way 6 Way 4MHz Blue Azur LED 75V 150mA Right Angle Header Right Angle Header Right Angle Header Right Angle Header Straight Header Right Angle Header Straight Header IDC Programming Header Strip Cut Crystal 3mm Signal Diode 3 CN2, CN6, CN7 1 CN3 1 CN4 1 CN5 1 CN8 1 CN9 1 CN10 1 CN11 CRYSTALS 1 X1 DIODES 1 D1 1 D4 Tolerance Factory P/N AP19787/4 Notes 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 10% 1065-002500E120 5% 1181-100042-000 5% 1181-220042-000 10% 1117-152052-900 10% 1100-103043-000 10% 1100-473044-000 10% 1117-473053-000 10% 1100-104043-000 10% 1117-684053E000 20% 1102-100014-000 2350-016300-001 2300-006010-000 Please mount on track side of PCB 2300-004010-000 2300-005000-000 2300-002000-001 3100-000030-003 1401-141480-000 Note: resistors, capaciotrs and other 'generic' electronic components are not usually stocked by the manufacturer. Please obtain these locally. 14 Cambridge Azur 740A Front Panel PCB Assembly BOM AP Part No Value Description/Type Qty Component Ident Type INTEGRATED CIRCUITS Tolerance Factory P/N 40 Pin Flash Microcontroller 1 U1 PIC16F877AI/P PY524 M74HC4094B 8 Bit Shift Register 1 U2 M74HC4094 B1R PY755 36KHz IR Receiver IC 1 U3 TSOP34836 PY471 PY108 PY214 Quad 2 Input Dual 45V 300mA NOR Gate Audio Op Amp NPN Signal 1 U4 M74HC02 2 U100, U200 NE5532P TRANSISTORS 3 Q1-Q3 BC337-25 4174-409052-600 3001-348360-000 4155-320052-900 1300-337000-100 AP19787/4 Notes Program with software: AP20357/x Please add version label! Note: resistors, capaciotrs and other 'generic' electronic components are not usually stocked by the manufacturer. Please obtain these locally. 15 Cambridge Audio Azur 740A Amplifier RCh In STAR LCh In +15V STAR -15V R L +15V -15V L R CN12 1 2 3 4 5 6 7 8 9 9 Way Straight Header CN13 1 2 3 4 4 Way Straight Header R L U8 LM317T Adj Regulator 3 VI 2 VO 1 ADJ C3 47nF 63V Met. Polyester C13 47uF 35V Electrolytic R11 3k 1/8W Metal Film R16 220R 1/8W Metal Film R12 1k8 1/8W Metal Film C16 100uF 25V Electrolytic STAR C12 47uF 35V C11 Electrolytic 47nF 63V Met. Polyester R13 620R 1/8W Metal Film 1 ADJ VI 2 VO 3 U7 LM337T Adj Regulator R14 10k 1/8W Metal Film C15 R15 120R 1/8W Metal Film 100uF 25V Electrolytic +6.6VA C17 47nF 63V Met. Polyester C14 47nF 63V Met. Polyester -6.6VA -15V 4 RL1:B 3 5 ME2-5S 2P2T Relay R46 1/4W Metal Film 330R R47 1/4W Metal Film 330R C48 Polypropylene 100nF 100V C47 NP Electrolytic 100uF 25V STAR +15V C78 100uF 25V Electrolytic C77 100uF 25V Electrolytic RCh Out R L LCh Out CN5 1 2 3 4 5 6 6 Way Straight Header TO POWER AMP R36 220R 1/8W Metal Film -6.6VA R35 +6.6VA 220R R34 1/8W Metal Film 220R 1/8W Metal Film 220R 1/8W Metal Film R33 8 RL1:C 6 7 ME2-5S 2P2T Relay R45 1/4W Metal Film 330R 47nF 63V 47nF 63V Met. Polyester Met. Polyester L C37 C40 C38 Electrolytic 470uF 10V Electrolytic L 470uF 10V C39 RCh Out Electrolytic 470uF 10V C56 LCh Out C42 Electrolytic 470uF 10V C55 C41 47nF 63V 47nF 63V Met. Polyester Met. Polyester R C49 R44 1/4W Metal Film 330R R NP Electrolytic 100uF 25V C50 Polypropylene 100nF 100V U2 IN1 24 REF1A 23 REF1B 22 OUT1 21 AVDD1 20 AVSS1 19 AVSS2 18 AVDD2 17 OUT2 16 REF2B 15 REF2A 14 IN2 13 YAC526 Volume IC -15V R129 10k 1 1/8W Metal Film ZCEN 2 ZCEN2 3 CSN Volume Strobe 4 SDATAI Data 5 DGND 6 REF 7 DVSS -6.6VD 8 SCLK Clock 9 SDATAO 10 TE1 C35 C36 Mono Ceramic 11 TE2 47uF 35V 100nF 100V 12 TE3 Electrolytic 5 RL2:B 3 4 ME2-5S 2P2T Relay 8 RL2:C 6 7 ME2-5S 2P2T Relay HP Q14 BC327-25 PNP Signal RL2:A 1 LK1 24 AWG 12.5mm Pitch R49 1206 Thick Film 10k R105 1206 Thick Film 1k +5V RC5 Block DGND C8 47uF 35V Electrolytic C9 Mono Ceramic 100nF 100V R141 620R 1/8W Metal Film 1 ADJ VI 2 VO 3 U6 LM337T Adj Regulator R140 10k 1/8W Metal Film R142 120R 1/8W Metal Film C34 47uF 35V Electrolytic FB3 On 24AWG Wire 1uH Ferrite C120 Mono Ceramic 100nF 100V R130 220R 1/8W Metal Film C119 Electrolytic 470uF 10V C10 Mono Ceramic 100nF 100V -6.6VD 2 ME2-5S 2P2T Relay HP RL1:A 1 2 ME2-5S 2P2T Relay MPSA14 NPN Darlington D13 1N4004 Rectifier Diode +5V D1 1N4004 Rectifier Diode Q13 R19 1k R131 1/4W Metal Film 10k 1/8W Metal Film Tone Defeat Relay MAIN To enhance viewing, please print to A3AP19799/6 Preamp PCB Circuit Diagram (Tone Control) 16 Cambridge Audio Azur 740A Amplifier L Speaker Test R Speaker Test Temp Sense 6SHDNHU&DEOH6KRUW&LUFXLW'HWHFWRU Senses a DC resistance of 2 ohms or less +5V R80 1k 1/8W Metal Film For 1mA R81 10k 1/8W Metal Film D10 Rectifier Diode 1N4004 R75 100R 1/8W Metal Film R73 4.7R 1/8W Metal Film 4 8 U13:A LM393AP Dual Comparator 3 1 2 C112 100nF 50V Mono Ceramic +5V R82 1k 1/8W Metal Film For 1mA D9 Rectifier Diode 1N4004 R71 100R 1/8W Metal Film U13:B LM393AP Dual Comparator 5 7 6 DGND R72 4k7 1/8W Metal Film R74 10k 1/8W Metal Film 3 2 8 U14:A LM393AP Dual Comparator 1 4 R65 R69 100k 1/8W Metal Film R68 4k7 1/8W Metal Film Open Collector Output PIC Temp R64 4k7 1/8W Metal Film (Open Collector Output) D8 C51 100uF 16V Electrolytic 1N4148 Signal Diode PIC VI/Short R29 4k7 DGND 1/8W Metal Film (Open Collector Output) C54 100uF 16V Electrolytic D14 1N4148 Signal Diode PIC VI/Short DGND +5V +5V +5V C21 100uF 16V Electrolytic RC5 Block RC5 TX Head Phones Detect Tone Defeat Relay Head Phones Detect Gnd PIC IR on/off C63 10nF 50V Ceramic CN1 1 2 3 4 5 6 3,& 6LJQDOV 6 Way Straight Header DGND UNREG PIC GND L Speaker Test R Speaker Test Speaker A Relay Speaker B Relay R70 2W Carbon 220R 1 2 3 Clean Gnd 4 5 6 Relay Gnd 7 DGND CN9 6SHDNHU 3&% 6LJQDOV 7 Way Straight Header C6 Mono Ceramic 100nF 100V Speaker B Relay Speaker A Relay Preamp Standby PIC VI/Short C7 100uF 16V Electrolytic +5V PIC Clip Mains Fail PIC DC PIC Temp DGND CN3 1 2 3 4 5 6 7 8 9 10 3,& 6LJQDOV DGND 10 Way Straight Header To PIC +5V C58 Mono Ceramic 100nF 100V U14:B LM393AP Dual Comparator 5 7 6 0DLQV 3&% 6LJQDOV CN8 3 2 1 3 Way Straight Header POWER AMP STANDBY UNREG DGND Temp Sense PIC VI/Short PIC DC PIC CLIP R144 1/4W Metal Film 10k CN7 1 2 3 4 5 3URWHFWLRQ 6LJQDOV 7R$PS 5 Way Straight Header DGND 910R 1/8W Metal Film 910 / (910 + 10k) with ZP221A501E voltage gives 100deg C cutout DGND To enhance viewing, please printAtoPA139799/6 Preamp PCB Circuit Diagram (Protection Circuitry ) 17 Cambridge Audio Azur 740A Amplifier AC Sense 2 AC Sense 1 D2 Rectifier Diode 1N4004 D3 Rectifier Diode 1N4004 R132 10k 1/8W Metal Film 1N4148 +5V D15 Signal Diode R67 4k7 1/8W Metal Film C31 Mono Ceramic 330nF 100V R66 4k7 1/8W Metal Film Q12 BC327-25 PNP Signal Mains Fail C22 47uF 35V Electrolytic U5 L7805 Regulator 1 VI 3 VO 2 GND C52 100nF 50V Mono Ceramic +5V C53 100nF 50V Mono Ceramic AC Sense 1 Main C30 C28 UNREG No Fit Mono Ceramic D4 No Fit Mono Ceramic D5 MBR1100 MBR1100 Schottky Rectifier Schottky Rectifier CN6 1 2 3 3 Way Straight Header Main C29 Met. Polyester 39nF 250V D6 D7 Main MBR1100 Schottky Rectifier C27 MBR1100 Schottky Rectifier C32 C57 2200uF 35V Electrolytic AC Sense 2 No fit Mono Ceramic No Fit Mono Ceramic Q11 BC327-25 PNP Signal R30 47R 2W Carbon DGND U3 L7815 Regulator 1 VI 3 VO 2 GND R127 C26 2200uF 35V Electrolytic 1/4W Metal Film 4k7 Q8 22.5V 240V BC337-25 NPN Signal R137 10k 1/8W Metal Film R139 Preamp Standby +5V Q9 R126 100k 1/8W Metal Film R48 BC327-25 PNP Signal R128 6k2 1/8W Metal Film 7k5 1/4W Metal Film 28V 240V Q10 BC337-25 NPN Signal 10k 1/8W Metal Film R136 10k 1/8W Metal Film BC337-25 NPN Signal Q7 R138 10k 1/8W Metal Film Main -Unreg C25 47nF 63V Met. Polyester C33 47nF 63V Met. Polyester VI 2 U4 L7915 Regulator 1 GND 100uF 25V Electrolytic 105 C24 Met. Polyester 47nF 63V C19 D11 Rectifier Diode 1N4004 C23 Met. Polyester 47nF 63V C18 100uF 25V Electrolytic 105 D12 Rectifier Diode 1N4004 VO 3 +15V -15V W5 WIRE1 A FB5 On 24AWG Wire 1uH Ferrite DGND W6 A STAR To enhance viewing, please print to A3AP19799/6 Preamp PCB Circuit Diagram (Power Supply) 18 Cambridge Audio Azur 740A Amplifier RCh HP Out 5FK2XW R32 1/4W Metal Film 100R LCh HP Out /FK2XW R27 1/4W Metal Film 100R C117 100pF 50V NP0 Ceramic R20 1/4W Metal Film 1k5 U1:B 5 6 R31 1/4W Metal Film 1k5 7 NE5532P Audio Op Amp HP R39 1/4W Metal Film 5k6 Q6 BD139 NPN Power R43 Q4 1/4W Metal Film 560R BD139 R42 NPN Power 1/4W Metal Film 560R R40 1/4W Metal Film 3k3 R8 1/4W Metal Film 1R R41 1/4W Metal Film 2k7 R6 1/4W Metal Film 1R Q5 BD140 PNP Power R7 1/4W Metal Film 5k6 R9 1/4W Metal Film 180R C2 10nF 63V Polyester R10 360R 1/4W Metal Film +15V R38 10R 1/4W Metal Film C43 Electrolytic 470uF 25V C44 C118 100pF 50V NP0 Ceramic 8 R26 Met. Polyester 1/4W Metal Film 47nF 63V 1k5 HP U1:A 2 1 3 R28 NE5532P 4 Audio Op Amp 1/4W Metal Film 1k5 R21 1/4W Metal Film 5k6 Q3 BD139 NPN Power R25 Q2 1/4W Metal Film 560R BD139 R24 NPN Power 1/4W Metal Film 560R R22 1/4W Metal Film 3k3 R23 1/4W Metal Film 2k7 R3 1/4W Metal Film 1R R1 1/4W Metal Film 1R HP R37 CE4le6ctrolytic 470uF 25V C45 -15V 47nF 63V 10R Met. Polyester 1/4W Metal Film R2 1/4W Metal Film 5k6 Q1 BD140 PNP Power R4 1/4W Metal Film 180R C1 10nF 63V Polyester R5 360R 1/4W Metal Film Head Phones Detect Head Phones Detect Gnd R17 10R 2W Carbon R18 10R 2W CarboCn4 680pF 50V NP0 Ceramic C5 680pF 50V NP0 Ceramic W3 C W1 B Main HP CN2 8 7 3 2 RSW1 RSW2 R L 1 CK-6.35-08A Headphone Jack GND W4 WIRE3 C HP WIRE2 W2 B HP To enhance viewing, please print tAo AP319799/6 Preamp PCB Circuit Diagram (Headphone Driver) 19 Cambridge Audio Azur 740A Amplifier +15V 5 7 6 -15V 3 6 3 6 3 STAR 6 3 6 3 L R124 J2 No Fit 1/4W Metal Film C116 Screw Terminal CN18:B AV2-8.4-9 CN17:D AVC4-18.04-29 CN17:B AV4-8.4-9 CN16:D CAV140-80.4-9 CN16:B AV4-8.4-9 CN15:D AV4-8.4-9 CN15:B AV4-8.4-9 Ceramic No Fit PreOut Left 220pF 50V NP0 Ceramic R87 NP0 Ceramic R89 220pF 50V R121 47k 1/8W Metal Film C104 R50 47uF 16V NP Electrolytic R92 STAR C97 47uF 16V 220R 1/8W Metal Film NP Electrolytic 220R 1/8W Metal Film C89 C105 1206 Thick Film 47k 1k 1/8W Metal Film R96 R51 1206 Thick4F7ilkm C93 NP Electrolytic 47uF 16V R100 NP Electrolytic 47uF 16V R104 100pF 50V NP0 Ceramic STAR C95 1k STAR 100pF 50V NP0 Ceramic 1/8W Metal Film C91 R83 47k 1206 Thick Film1/8W Metal Film 1k C85 47k R84 1/8W Metal Film 1206 Thick Film 1k C69 STAR 100pF 50V NP0 Ceramic 100pF 50V 100pF 50V NP0 Ceramic NP0 Ceramic U20:B U15:B STAR U16:B STAR U17:B U18:B R60 U11:A R62 R 70 72 72 0' '9' '$% &' 1/4W Metal Film 1/4W Metal Film 47R 47R U11:B 1 32 $X[ 3 1 2 CN14:D CN14:B 4 8 C62 C61 1 STAR STAR 4 1 4 1 4 1 4 CN17:C STAR CN14:C CN15:A CN15:C CN16:A CN16:C CN17:A CN18:A AV4-8.4-9 AV4-8.4-9 47nF 63V Met. Polyester NE5532P Audio Op Amp 47nF 63V Met. Polyester NE5532P Audio Op Amp STAR STAR 2 AV4-8.4-9 CN14:A C72 NP Electrolytic 47uF 16V 5 2 AV4-8.4-9 AV4-8.4-9 AV4-8.4-9 5 2 AV4-8.4C-999 NP Electrolytic 47uF 16V C113 NP Electrolytic 47uF 16V C88 NP Electrolytic 47uF 16V C92 STAR 220pF 50V NP0 Ceramic C96 NP Electrolytic 47uF 16V 5 AV4-8.4-9 2 CAV140-81.4-9 5 AV4-8.4-9 AV2-8.4-9 2 PreOut Right R90 220R 1/8W Metal Film NP0 Ceramic 220pF 50V STAR R88 C103 220R NP Electrolytic 1/8W Metal Film 47uF 16V C87 NP Electrolytic C71 47uF 16V R109 NP Electrolytic 47uF 16V R108 47k 1/8W Metal Film 47k R85 1/8W Metal Film STAR R91 C74 1206 Thick Film 1k C73 1206 Thick Film 1k 100pF 50V NP0 Ceramic 4 100pF 50V NP0 Ceramic STAR U19:B C76 47nF 63V Met. Polyester R106 R102 R98 R94 R86 R93 47k 1/8W Metal Film 1206 Thick Film 1k 100pF 50V NP0 Ceramic U19:A STAR C70 -15V +15V 8 4 C75 C67 R95 47k 1/8W Metal Film 1206 Thick Film 1k STAR C86 U18:A +15V 8 100pF 50V NP0 Ceramic -15V 4 47k R97 1/8W Metal Film 1206 Thick Film 1k 100pF 50V NP0 Ceramic C90 STAR U17:A +15V -15V 8 4 R99 47k 1/8W Metal Film 1206 Thick Film 1k STAR 100pF 50V NP0 Ceramic U16:A +15V 8 C94 -15V 4 47k R101 1/8W Metal Film 1206 Thick Film 100pF 50V 1k STAR NP0 Ceramic C98 U15:A -15V +15V R103 1206 Thick Film 1k U20:A +15V 8 4 8 C68 C83 C84 C111 C110 C109 C108 C106 C107 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 47nF 63V Met. Polyester 47nF 63V 47nF 63V Met. Polyester Met. Polyester Met. Polyester 47nF 63V Met. Polyester 47nF 63V 47nF 63V Met. Polyester Met. Polyester 47nF 63V Met. Polyester Met. Polyester Met. Polyester Met. Polyester 47nF 63V 47nF 63V 47nF 63V 47nF 63V 5 7 6 -15V 3 1 2 5 7 6 5 7 6 5 7 6 5 7 6 5 7 6 LCh Out RCh Out NE5532P Audio Op Amp NE5532P Audio Op Amp NE5532P Audio Op Amp NE5532P Audio Op Amp LCh HP Out R76 5 Wire Link 6 R79 No Fit STAR +15V R63 U12:B 7 NE5532P Audio Op Amp R123 220R 1/8W Metal Film C59 PreOut Left C115 220pF 50V NP0 Ceramic STAR RCh HP Out R77 Wire Link R78 No Fit 47R 1/4W Metal Film 3 2 8 4 47nF 63V U12:A Met. Polyester R122 1 NE5532P 220R STAR PreOut Right Audio Op Amp 1/8W Metal Film C114 R61 C60 47nF 63V Met. Polyester 220pF 50V NP0 Ceramic -15V STAR STAR 47R 1/4W Metal Film STAR NE5532P Audio Op Amp NE5532P Audio Op Amp STAR STAR NE5532P -15V Audio Op Amp +15V STAR STAR NE5532P Audio Op Amp R133 100R 1/4W Metal Film C20 R134 100R 1/4W Metal Film STAR Switch Strobe PIC GND Mono Ceramic U10 100nF 100V 1 Vss 2 L-S1 3 L-S2 4 L-S3 5 L-COM1 6 L-S4 7 L-S5 8 L-S6 9 L-COM2 10 L-S7 11 L-S8 12 L-COM3 13 ST 14 GND Vdd 28 R-S1 27 R-S2 26 R-S3 25 R-COM1 24 R-S4 23 R-S5 22 R-S6 21 R-COM2 20 R-S7 19 R-S8 18 R-COM3 17 DATA 16 CLK 15 TC9163AF CN10 &RQWURO%XV,5 1 $%863&%'*QG 2 $%86,5 3 $%866WDWXV 4 $%863&%9 5 6 7 8 9 10 STAR CBUS IR ABUS IR Preamp Standby +5V RC5 Block RC5 Tx PIC IR On/Off C64 FFC Connector ABUS Control Signals ABUS Control Signals PIC GND Ceramic 1nF 50V Data Clock CBUS IR Volume Strobe POWER AMP STANDBY ABUS IR Switch Strobe Data S1 Clock Screw Terminal STAR STAR STAR NE5532P Audio Op Amp NE5532P Audio Op Amp STAR STAR STAR STAR NE5532P Audio Op Amp STAR NE5532P Audio Op Amp CN4 1 2 &RQWURO%XV,5 3 4 9ROXPH6WUREH 3RZHUDPS6WDQGE\ 5 $%86,5 6 ,QSXW6WUREH 7 '*QGIURP3,& 8 'DWD 9 &ORFN 9 Way Straight Header PIC GND To PIC R56 470k 1/4W Metal Film STAR R57 470k 1/4W Metal Film STAR FB4 On 24AWG Wire 1uH Ferrite STAR ABUS 10pF 50V NP0 Ceramic C82 R53 1 560R 2 1/4W Metal Film 3 CN11 /&K *1' 5&K ABUS 3 Way Straight Header ABUS Audio Out R55 1k8 1/4W Metal Film R52 560R 1/4W Metal Film 5 U9:B 7 6 NE5532P Audio Op Amp R54 C79 10pF 50V NP0 Ceramic 1k8 1/4W Metal Film R58 +15V C81 1k8 1/4W Metal Film STAR U9:A STAR 4 47nF 63V Met. Polyester 3 1 2 R59 1k8 8 NE5532P Audio Op Amp C80 1/4W Metal Film LCh In RCh In STAR -15V STAR 47nF 63V Met. Polyester To enhance viewing, please print tAo AP319799/6 Preamp PCB Circuit Diagram (Buffers & Switches) 20 Cambridge Audio Azur 740A Amplifier LarryR To enhance viewing, please print to A3 AP19799/4 Preamp PCB Board Layout (Top Side) 21 Cambridge Audio Azur 740A Amplifier To enhance viewing, please print to A3 AP19799/4 Preamp PCB Board Layout (Bottom Side) 22 Cambridge Audio Azur 740A Preamp PCB Assembly BOM AP Part No. Value Description/Type Qty Component Ident RESISTORS 1R 1/4W Metal Film 4 R1, R3, R6, R8 4.7R 1/8W Metal Film 1 R73 10R 2W Carbon 2 R17, R18 10R 1/4W Metal Film 2 R37, R38 47R 2W Carbon 1 R30 47R 1/4W Metal Film 4 R60-R63 100R 1/4W Metal Film 4 R27, R32, R133, R134 100R 1/8W Metal Film 2 R71, R75 120R 1/8W Metal Film 2 R15, R142 180R 1/4W Metal Film 2 R4, R9 R16, R33-R36, R87- 220R 1/8W Metal Film 12 R90, R122, R123, R130 220R 2W Carbon 1 R70 330R 1/4W Metal Film 4 R44-R47 360R 1/4W Metal Film 2 R5, R10 560R 1/4W Metal Film 6 R24, R25, R42, R43, R52, R53 620R 1/8W Metal Film 2 R13, R141 910R 1/8W Metal Film 1 R65 Wire Link 24AWG 2 R76, R77 No Fit 2 R78, R79 No Fit 1 R124 1k 1/4W Metal Film 1 R19 R50, R51, R83-R85, 1k 1206 Thick Film 12 R91, R93, R95, R97, R99, R101, R103 1k 1/8W Metal Film 2 R80, R82 1k 1206 Thick Film 1 R105 1k5 1/4W Metal Film 4 R20, R26, R28, R31 1k8 1/8W Metal Film 1 R12 1k8 1/4W Metal Film 4 R54, R55, R58, R59 2k7 1/4W Metal Film 2 R23, R41 3k 1/8W Metal Film 1 R11 3k3 1/4W Metal Film 2 R22, R40 4k7 1/8W Metal Film 6 R29, R64, R66-R68, R72 4k7 1/4W Metal Film 1 R127 5k6 1/4W Metal Film 4 R2, R7, R21, R39 6k2 1/8W Metal Film 1 R48 7k5 1/4W Metal Film 1 R128 10k 1/8W Metal Film 10 R14, R74, R81, R129, R132, R136-R140 10k 1206 Thick Film 1 R49 10k 1/8W Metal Film 1 R131 10k 1/4W Metal Film 1 R144 R86, R92, R94, R96, 47k 1/8W Metal Film 12 R98, R100, R102, R104, R106, R108, R109, R121 Type Tolerance Factory P/N AP19802/5 Notes 1% 1% 10% 1% 10% 1% 1% 1% 1% 1% 1% 10% 1% 1% 1% 1% 1% 1% 1% 1% 1% R76 and R77 has 1% been replaced with wire link 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% Note: resistors, capacitors and other 'generic' electronic componets are not usually stocked by the manufacturer. Please obtain these locally. 23 Cambridge Audio Azur 740A Preamp PCB Assembly BOM AP Part No. Value Description/Type Qty Component Ident 100k 1/8W Metal Film 2 R69, R126 470k 1/4W Metal Film 2 R56, R57 CAPACITORS No fit 4 C27, C28, C30, C57 No Fit 1 C116 10pF 50V NP0 Ceramic 2 C79, C82 100pF 50V 220pF 50V 680pF 50V NP0 Ceramic NP0 Ceramic NP0 Ceramic C69, C70, C73, C74, C85, C86, C90, C91, 14 C94, C95, C98, C105, C117, C118 6 C99-C102, C114, C115 2 C4, C5 1nF 50V Ceramic 1 C64 10nF 63V Polyester 2 C1, C2 10nF 50V 39nF 250V Ceramic Met. Polyester 47nF 63V Met. Polyester 100nF 100V 100nF 100V 100nF 50V Mono Ceramic Polypropylene 1206 Ceramic 1 C63 1 C29 C3, C11, C14, C17, C23-C25, C33, C37, C40, C41, C44, C45, 32 C55, C59-C62, C67, C68, C75, C76, C80, C81, C83, C84, C106-C111 7 C6, C9, C10, C20, C36, C58, C120 2 C48, C50 2 C52, C53 100nF 50V 330nF 100V 47uF 35V 47uF 16V Mono Ceramic Mono Ceramic Electrolytic NP Electrolytic 1 C112 1 C31 6 C8, C12, C13, C22, C34, C35 C71, C72, C87-C89, 12 C92, C93, C96, C97, C103, C104, C113 100uF 16V Electrolytic 4 C7, C21, C51, C54 100uF 25V Electrolytic 4 C15, C16, C77, C78 100uF 25V Electrolytic 105 2 C18, C19 100uF 25V 470uF 10V 470uF 25V NP Electrolytic Electrolytic Electrolytic 2 C47, C49 5 C38, C39, C42, C56, C119 2 C43, C46 Type Tolerance Factory P/N 1% 1% AP19802/5 Notes 5% 1181-100042000 1181-1010425% 000 5% 5% 10% 10% 10% 10% 1181-221042000 1181-681042000 1100-102043000 1117- 103053E000 1100-103043- 000 10% 1117-473053000 10% 10% 10% 10% 10% 20% 1106-104064001 1189-104042400 1100-104043000 20% 20% 20% 20% 20% 20% 20% 1105-470014000 1102-101014000 1102-101024000 1102- 101024E002 1105-101024- 000 Note: resistors, capacitors and other 'generic' electronic componets are not usually stocked by the manufacturer. Please obtain these locally. 24 Cambridge Audio Azur 740A Preamp PCB Assembly BOM AP Part No. Value Description/Type Qty Component Ident Type 2200uF 35V Electrolytic 2 C26, C32 6 Way Straight Header Stereo 6.35mm 10 Way 9 Way Headphone Jack Straight Header Straight Header 6 Way Straight Header 3 Way Straight Header 5 Way Straight Header 3 Way Straight Header 7 Way 10 Way 9 Way 4 Way Straight Header FFC Connector Straight Header Straight Header 4 Way Gold Plated Phono 2 Way Gold Plated Phono 400V 1A 100V 1A 75V 150mA 400V 1A Rectifier Diode Schottky Rectifier Signal Diode Rectifier Diode 1uH Ferrite On 24AWG Wire Dual 2 Channel +15V -15V +5V Negative Positive 16 Way Audio Op Amp Volume IC Regulator Regulator Regulator Adj Regulator Adj Regulator Input Switch CONNECTORS 1 CN1 1 CN2 1 CN3 1 CN4 1 CN5 1 CN6 1 CN7 2 CN8, CN11 1 CN9 1 CN10 1 CN12 1 CN13 4 CN14-CN17 1 CN18 DIODES 7 D1-D3, D9-D12 4 D4-D7 3 D8, D14, D15 1 D13 INDUCTORS 3 FB3-FB5 INTEGRATED CIRCUITS 10 U1, U9, U11, U12, NE5532P U15-U20 1 U2 YAC526 1 U3 L7815 1 U4 L7915 1 U5 L7805 2 U6, U7 LM337T 1 U8 LM317T 1 U10 TC9163AF Tolerance Factory P/N AP19802/5 Notes 20% 1102-222034000 With Cambridge Sleeving as per 640C V2 2300-006000000 2330-005901300 2300-009000000 2300-006100004 2300-003400001 2300-005100004 2300-003100004 2300- 007100E002 2300-004100004 2330- 006900E001 2330- 003911E034 1401-140040000 1401-141480000 1401-140040000 1503-000000100 4155-320052900 4178150302E600 4179150302E600 4178050334E700 4133-700301- 800 4131-700301- 800 4191630103E001 Note: resistors, capacitors and other 'generic' electronic componets are not usually stocked by the manufacturer. Please obtain these locally. 25 Cambridge Audio Azur 740A Preamp PCB Assembly BOM AP Part No. Value Description/Type Qty Component Ident Low Offset Dual Comparator 2 U13, U14 RELAY PY504 5V 2A 2P2T Relay 2 RL1, RL2 TRANSISTORS PY1235 -80V 1.5A PNP Power 2 Q1, Q5 PY1230 80V 1.5A NPN Power 4 Q2-Q4, Q6 PY214 45V 300mA NPN Signal 3 Q7, Q8, Q10 PY219 -45V 500mA PNP Signal 4 Q9, Q11, Q12, Q14 PY1211 30V 500mA NPN Darlington 1 Q13 Type LM393AP ME2-5S BD140 BD139 BC337-25 BC327-25 MPSA14 Tolerance Factory P/N 4139300052E900 4050-000005002 1301140000E800 1300139000E800 1300-337000- 100 1301-327000- 100 1300-140000- 100 AP19802/5 Notes Note: resistors, capacitors and other 'generic' electronic componets are not usually stocked by the manufacturer. Please obtain these locally. 26 Cambridge Audio Azur 740A Amplifier Left L SPEAKER TEST 7 RL1:C 6 8 ME11-012-2Z4 J5 4 RL2:B 2P2T Relay SPKRB R80 3 5 15R ME11-012-2Z4 1/2W Carbon 2P2T Relay With xxxxxxxx Wurth SPKRA ferrite beads added 7 L1 C6 24.5T 0.9mm J7 Output Inductor 330pF 50V Ceramic 5 Right R SPEAKER TEST 4 RL1:B 3 5 ME11-012-2Z4 7 RL2:C 2P2T Relay J11 R104 6 Spkr B 8 15R ME11-012-2Z4 1/2W Carbon 2P2T Relay With xxxxxxxx Wurth Spkr A 8 ferrite beads added 1 L2 C75 C51 330pF 50V Ceramic J9 6 24.5T 0.9mm Output Inductor 330pF 50V Ceramic 3 2 C76 330pF 50V Ceramic 4 W19 W21 W23 W25 WIRE7 Black 18 AWG Insulated Wire WIRE8 Black18 AWG Insulated Wire W20 W22 WIRE9 Black 18 AWG Insulated Wire WIRE10 Black 18 AWG Insulated Wire W24 W26 CN5 1 2 3 SPKR A 4 Gnd 5 SPKR B 6 Relay Unreg 7 Relay Gnd 7 Way Straight Header Relay Unreg L Speaker Test R Speaker Test D27 1N4004 Rectifier R107 10K 1/8W Metal Film R106 10K 1/8W Metal Film 1RL2:A 2 ME11-012-2Z4 Speaker A Relay Q34 MPSA14 NPN Darlington D28 1N4004 Rectifier D11 1N4004 Rectifier Relay Unreg RL1:A 1 D26 1N4004 Rectifier R103 10K 1/8W Metal Film R105 10K 1/8W Metal Film 2 ME11-012-2Z4 Speaker B Relay Q35 MPSA14 NPN Darlington CT1 Black Cable Tie CT2 Black Cable Tie CN7:A CN7:C 1 1 2 2 5 5 6 6 Loudspeaker Loudspeaker CN7:B CN7:D 3 3 4 4 7 7 8 8 Loudspeaker Loudspeaker To enhance viewing, please print to A3 AP19794/4 Amplifier Circuit Diagram (Speaker PCB) 27 Cambridge Audio Azur 740A Amplifier CN4 1 2 Straight Header 2 Way Q32 2SC2240GR +50V R R76 NPN Low Noise +50V. R C38 Polyester 47nF 63V R AMP C33 C40 Electrolytic Q29 MPSA92 PNP Signal R51 1/8W Metal Film 150R R50 1K 1/8W Metal Film Q28 MPSA92 PNP Signal R48 1/4W Metal Film 47K R46 1/8W Metal Film 150R R47 1/8W Metal Film 100K Q27 2SA970GR PNP Low Noise R53 1/4W Metal Film 100R R55 100R 1/4W Metal Film R AMP 22.73 C31 R68 1/8W Metal Film 10R C39 Electrolytic Q26 R AMP 2SC2240GR NPN Low Noise Polypropylene 100nF 100V C34 R54 1/8W Metal Film NP Electrolytic 47R 100uF 25V R69 R52 10K 100K 1/8W Metal Film 1/8W Metal Film Q22 Q21 2SA970GR 2SA970GR PNP Low Noise PNP Low Noise C32 100pF 50V NP0 Ceramic R57 1/8W Metal Film 22K C36 220pF 63V Polypropylene film R AMP 24AWG 10pF 50V Wire Link NP0 Ceramic R58 1/4W Metal Film R56 10K 1/8W Metal Film 470R C50 NP Electrolytic 47uF 16V R AMP R AMP C37 NP Electrolytic 100uF 25V R43 1/4W Metal Film 22K R41 1/8W Metal Film 47K Q19 MPSA42 NPN Signal R AMP C29 Polyester 47nF 63V C28 Electrolytic R AMP R49 1/8W Metal Film Q20 18R MPSA42 NPN Signal C49 Polypropylene 1nF 63V R AMP Q23 2SC2240GR NPN Low Noise R110 1/8W Metal Film 470R R111 1/8W Metal Film 470R Q25 MPSA92 PNP Signal R59 1/8W Metal Film 2K2 R44 13k 1/8W Metal Film C14 Polypropylene 1nF 63V D30 Rectifier 1N4004 Q24 2SC2240GR NPN Low Noise R122 2K7 1/8W Metal Film R45 1/8W Metal Film 470R Q17 MPSA42 NPN Signal Q18 MPSA42 NPN Signal R40 1/8W Metal Film 1K R39 1/8W Metal Film 130R R73 1/8W Metal Film 2K2 R70 1/8W Metal Film 100R R138 B 1 1/8W Metal Film 100R B 1 C S D 4 3 3 C Q54 SAP15NY NPN Power S 4 E RE1 RO 5 2 C35 Polypropylene film 10nF 63V 2 D Q57 SAP15NY NPN Power 5 E R134 CW CCW 1 PR2 R78 Multiturn Preset B200R 0.22R 3W Wirewound 2 1 0.22R 3 CCW PR4 Multiturn Preset B200R 2 3W Wirewound R135 R65 0.22R 3W Wirewound CW 0.22R 3 3W Wirewound Q58 SAP15PY RE2 4 PNP Power E D 1 4 1 R AMP 3 3 S D 2 R139 5 1/8W Metal Film B 100R C R60 5 1/8W Metal Film B 100R C30 R61 Electrolytic R38 1/8W Metal Film 100K 1/8W Metal Film 2K2 R37 E S 2 Q53 SAP15PY PNP Power C C61 220uF 63V Polarised Electrolytic R AMP D19 Rectifier 1N4004 J12 WIRE17 C59 Mono Ceramic 100nF 100V Red 18 AWG Insulated Wire Output Wires to Speaker PCB: R66 4.7R 3W WireWound J16 WIRE18 Black 18 AWG Insulated Wire R AMP D20 Rectifier 1N4004 R AMP C53 220uF 63V Polarised Electrolytic 1/8W Metal Film Q16 10R 2SA970GR PNP Low Noise -50V R -50V. R To enhance viewing, please print to A3 AP19794/4 Amplifier Circuit Diagram (Right Channel) 28 Cambridge Audio Azur 740A Amplifier C21 Polyester 47nF 63V L AMP C19 Polypropylene 100nF 100V C18 R9 CN1 1 2 Straight Header 2 Way Left Input 1/8W Metal Film NP Electrolytic 47R 100uF 25V R31 R7 1/8W Metal Film 1/8W Metal Film 100K 10K L AMP C9 Polyester 47nF 63V C23 Electrolytic R6 1/8W Metal Film 150R R5 Q4 MPSA92 PNP Signal 1/8W Metal Film 1K R8 100R 1/4W Metal Film R10 100R 1/4W Metal Film Q5 Q11 2SA970GR 2SA970GR PNP Low Noise PNP Low Noise R12 C7 100pF 50V NP0 Ceramic 1/8W Metal Film 22K C16 220pF 63V Polypropylene film L AMP Q15 2SC2240GR +50V L R36 NPN Low Noise +50V. L Q3 MPSA92 PNP Signal R3 1/8W Metal Film 150R R2 1/8W Metal Film 100K R114 1/4W Metal Film 47K Q2 2SA970GR PNP Low Noise 22.73 L AMP C8 R30 1/8W Metal Film 10R C22 Electrolytic L AMP Q1 2SC2240GR NPN Low Noise 24AWG 10pF 50V Wire Link NP0 Ceramic R13 1/4W Metal Film R11 10K 1/8W Metal Film 470R C5 NP Electrolytic 47uF 16V L AMP L AMP C20 NP Electrolytic 100uF 25V R18 1/4W Metal Film 22K R20 1/8W Metal Film 47K R35 1/8W Metal Film R32 2K2 1/8W Metal Film 100R B 1 C R136 B 1 1/8W Metal Film 100R 3 3 C Q52 SAP15NY NPN Power S 4 C56 Polarised Electrolytic 220uF 63V D21 L AMP Rectifier 1N4004 S D 4 E LE1 LO 5 2 C17 Polypropylene film 10nF 63V 2 1 D Q55 SAP15NY NPN Power 5 E 2 R133 0.22R 3W Wirewound 3 CW CCW 1 R113 0.22R PR1 3W Wirewound Multiturn Preset B200R CCW PR3 Multiturn Preset B200R 3 CW 4 2 Q56 SAP15PY PNP Power D R132 0.22R 3W Wirewound E R27 0.22R 3W Wirewound LE2 J6 WIRE15 Red 18 AWG Insulated Wire C15 Mono Ceramic 100nF 100V Output Wires to Speaker PCB: R28 4.7R 3W WireWound J17 WIRE16 Black 18 AWG Insulated Wire 1 4 1 Q9 MPSA42 NPN Signal MPSA42 NPN Signal L AMP R4 Q10 1/8W Metal Film 18R C4 Polypropylene 1nF 63V L AMP Q6 2SC2240GR NPN Low Noise C11 100uF 63V Electrolytic R17 1/8W Metal Film 470R R16 1/8W Metal Film 470R Q8 MPSA92 PNP Signal R29 1/8W Metal Film 2K2 R14 1/8W Metal Film 13k C13 Polypropylene 1nF 63V D29 Rectifier 1N4004 Q7 2SC2240GR NPN Low Noise Q12 MPSA42 NPN Signal Q13 MPSA42 NPN Signal R67 1/8W Metal Film 2K7 R115 1/8W Metal Film 470R R19 1/8W Metal Film 1K R21 1/8W Metal Film 130R S D 2 R137 5 1/8W Metal Film B 100R C R15 5 1/8W Metal Film B 100R C10 R24 Electrolytic R22 1/8W Metal Film 100K 1/8W Metal Film 2K2 R23 1/8W Metal Film Q14 10R 2SA970GR -50V L PNP Low Noise L AMP 3 3 E L AMP D22 S Rectifier 2 1N4004 L AMP C Q51 SAP15PY PNP Power C12 Polarised Electrolytic 220uF 63V -50V. L To enhance viewing, please print to A3 AP19794/4 Amplifier Circuit Diagram (Left Channel) 29 Cambridge Audio Azur 740A Amplifier DC Detection +50V P D5 Right Protection PCB (Clipping) +50V. R Left Protection PCB (Clipping) R112 LO 100K 1/8W Metal Film C55 1N4148 Signal Diode D8 NP Electrolytic DGND 10uF 25V 1N4148 Signal Diode D6 D7 1N4148 Signal Diode R42 100K 1/8W Metal Film R77 10k 1/8W Metal Film Q31 R140 4K7 PIC DC Detect Q49 MPSA42 NPN Signal +50V. R H16A H16B R100 1/8W Metal Film 15K H15B H15A Q42 MPSA92 PNP Signal R117 1/8W Metal Film 120K +50V P H8A H8B +50V P R89 1/8W Metal Film 15K H7B H7A Q39 MPSA92 PNP Signal R120 120K 1/8W Metal Film L AMP R63 1N4148 Signal Diode RO 100K D9 1/8W Metal Film C54 NP Electrolytic 10uF 25V 1N4148 Signal Diode D10 R AMP 1N4148 Signal Diode DGND MPSA42 NPN Signal 1/8W Metal Film Q30 MPSA92 PNP Signal DGND R109 100K 1/8W Metal Film D25 H14B RO R99 1/8W Metal Film 100K 1N4148 Signal Diode R96 1/8W Metal Film 100K R97 1/8W Metal Film 120K Q43 R98 1/8W Metal Film 120K D31 LO 1N4148 Signal Diode Q44 MPSA42 NPN Signal D24 H6B R88 1/8W Metal Film 100K 1N4148 Signal Diode R86 1/8W Metal Film 100K R87 1/8W Metal Film 120K Q38 R90 1/8W Metal Film 120K Q45 MPSA42 NPN Signal D32 1N4148 Signal Diode PIC Clip Detect R75 1/8W Metal Film 4K7 D17 Zener 5V1 1/2W -50V P Left Protection PCB Connector (A) CN2 CN8 -50V. R R95 1/8W Metal Film 15K H13A H13B MPSA42 NPN Signal R116 1/8W Metal Film 2K2 -50V. R R118 1/8W Metal Film 100R -50V P H5A H5B R85 1/8W Metal Film 15K MPSA42 NPN Signal -50V P R119 R121 1/8W Metal Film 1/8W Metal Film DGND 2K2 100R DGND H1A 1 H2A 2 H3A 3 H4A 4 H5A 5 6 H7A 7 H8A 8 1 H1B VI Output (R) 2 H2B VI Bottom Input (R) 3 H3B Amp Output (R) 4 H4B VI Top Input (R) 5 H5B -45V (R) 6 H6B Amp Output (R) 7 H7B Clip Output (R) 8 H8B +45V (R) H8B R79 1/8W Metal Film 18K C62 Ceramic 4.7nF 50V Q33 MPSA92 R124 1/8W Metal Film 18K C3 Ceramic 4.7nF 50V Q46 MPSA92 H16B R126 1/8W Metal Film 18K C45 Ceramic 4.7nF 50V Q47 MPSA92 R127 1/8W Metal Film 18K C72 Ceramic 4.7nF 50V Q48 MPSA92 Right Angle Pin Header Right Angle Pin Header PNP Signal PNP Signal PNP Signal PNP Signal 8 Way 8 Way H9B H9A Right Protection PCB Connector (B) CN3 CN9 H9A 1 H10A 2 H11A 3 H12A 4 H13A 5 6 H15A 7 H16A 8 1 H9B VI Output (R) 2 H10B VI Bottom Input (R) 3 H11B Amp Output (R) 4 H12B VI Top Input (R) 5 H13B -45V (R) 6 H14B Amp Output (R) 7 H15B Clip Output (R) 8 H16B +45V (R) Right Angle Pin Header Right Angle Pin Header 8 Way 8 Way TH1 Left Protection PCB (VI) +50V. L LE1 R33 H4A H4B 51K 1/4W Metal Film R34 1/8W Metal Film 2K2 H3A H3B LO C64 R83 Ceramic 220pF 50V 2K2 1/8W Metal Film R84 2K2 1/8W Metal Film C65 Electrolytic 10uF 63V Temp Sense PTC Thermistor 100 Degree 500R Mounted on Heatsink DGND PIC VI/Short PIC DC Detect PIC Clip Detect CN6 1 2 3 4 5 5 Way Straight Header To input PCB/To PIC LE2 -50V. L R26 1/8W Metal Film 2K2 R25 H2A H2B 51K 1/4W Metal Film C63 R81 220pF 50V Ceramic 2K2 1/8W Metal Film R82 2K2 1/8W Metal Film C66 10uF 63V Electrolytic R102 1/8W Metal Film 47K R123 1/8W Metal Film 47K Right Protection PCB (VI) H1B H1A R101 1/8W Metal Film 47K R125 1/8W Metal Film 47K Q37 MPSA42 NPN Signal R130 1/8W Metal Film 47K Q36 MPSA42 NPN Signal +50V. R RE1 R131 1/8W Metal Film 47K RE2 -50V. R R71 H12A H12B 51K 1/4W Metal Film R72 1/8W Metal Film 2K2 H11A H11B RO R64 1/8W Metal Film 2K2 R62 H10A H10B 51K 1/4W Metal Film C69 220pF 50V R93 Ceramic 2K2 1/8W Metal Film R94 2K2 1/8W Metal Film C68 10uF 63V Electrolytic C70 Ceramic R91 220pF 50V 2K2 1/8W Metal Film R92 2K2 1/8W Metal Film C67 10uF 63V Electrolytic Q40 MPSA42 NPN Signal R128 1/8W Metal Film 47K Q41 MPSA42 NPN Signal R129 1/8W Metal Film 47K R74 47K 1/8W Metal Film D18 1N4148 Signal Diode D16 Zener 5V1 1/2W PIC VI/Short DGND To enhance viewing, please print to A3 AP19794/4 Amplifier Circuit Diagram (Protection) 30 Cambridge Audio Azur 740A Amplifier +50V L +50V R Bus Bar (see page 6) Bus Bar (see page 6) W7 W9 W8 +50V P C24 105deg Electrolytic 6800uF 63V C27 105deg Electrolytic 6800uF 63V C42 105deg Electrolytic 6800uF 63V W10 C41 105deg Electrolytic 6800uF 63V C25 105deg Electrolytic 6800uF 63V C26 105deg Electrolytic 6800uF 63V C43 105deg Electrolytic 6800uF 63V C44 105deg Electrolytic 6800uF 63V -50V P W11 W15 W12 W16 W17 W13 W14 W18 -50V L L AMP -50V R R AMP C1 C2 39nF 250V Metallised Polyester D13 Metallised Polyester 39nF 250V D14 Rectifier 6A20 D12 Rectifier 6A20 D15 Rectifier 6A20 C46 Rectifier 6A20 C47 Metallised Polyester 39nF 250V Metallised Polyester 39nF 250V C52 C57 Metallised Polyester 39nF 250V D3 Metallised Polyester 39nF 250V D2 Rectifier 6A20 D4 Rectifier 6A20 D1 Rectifier 6A20 C58 Rectifier 6A20 C60 Metallised Polyester 39nF 250V Metallised Polyester 39nF 250V F4 Fast Blow Fuse F8A LBC W1 Red-2 WIRE1 Red 18 AWG Insulated Wire C48 Met Polypropylene X2 470nF 275V F3 Fast Blow Fuse F8A LBC W3 WIRE2 Yellow 18 AWG Insulated Wire Yellow-2 C73 W2 WIRE3 Orange 18 AWG Insulated Wire Orange-2 Ceramic 1nF 50V R108 J19 1/4W Metal Film 100R F1 Fast Blow Fuse F8A LBC W4 WIRE4 Yellow 18 AWG Insulated Wire Red C71 Met Polypropylene X2 470nF 275V F2 Fast Blow Fuse F8A LBC W6 WIRE5 Red 18 AWG Insulated Wire Yellow C74 Ceramic 1nF 50V R1 1/4W Metal Film 100R W5 WIRE6 Orange 18 AWG Insulated Wire Orange J4 Bus Bar (see page 6) Bus Bar (see page 6) Bus Bar (see page 6) Bus Bar (see page 6) To enhance viewing, please print to A3 AP19794/4 Amplifier Circuit Diagram (Power Supply) To Mains PCB Connection 2 To Mains PCB Connection 1 31 Cambridge Audio Azur 740A Amplifier LarryR To enhance viewing, please print to A3 AP19794/3 Amp PCB Board Layout (Top Side) 32 Cambridge Audio Azur 740A Amplifier To enhance viewing, please print to A3 AP19794/3 Amp PCB Board Layout (Bottom Side) 33 Cambridge Azur 740A Amp PCB Assembly BOM AP Part No. Value Description/Type Qty Component Ident Type 0.22R 24AWG 4.7R 10R 15R 18R 47R 100R 100R 130R 150R 470R 1K 3W Wirewound Wire Link 3W WireWound 1/8W Metal Film 1/2W Carbon 1/8W Metal Film 1/8W Metal Film 1/4W Metal Film 1/8W Metal Film 1/8W Metal Film 1/8W Metal Film 1/8W Metal Film 1/8W Metal Film RESISTORS 8 R27, R65, R78, R113, R132-R135 2 R30, R68 2 R28, R66 4 R23, R36, R37, R76 2 R80, R104 2 R4, R49 2 R9, R54 6 R1, R8, R10, R53, R55, R108 R15, R32, R60, R70, 10 R118, R121, R136- R139 2 R21, R39 4 R3, R6, R46, R51 R11, R16, R17, R45, 8 R56, R110, R111, R115 4 R5, R19, R40, R50 R24, R26, R29, R34, 2K2 1/8W Metal Film 16 R35, R59, R61, R64, R72, R73, R81-R84, R116, R119 2K2 1/8W Metal Film 2 R91, R93 2K2 1/8W Metal Film 2 R92, R94 2K7 1/8W Metal Film 2 R67, R122 4K7 1/8W Metal Film 2 R75, R140 10K 1/8W Metal Film 7 R7, R52, R77, R103, R105-R107 10K 1/4W Metal Film 2 R13, R58 13k 1/8W Metal Film 2 R14, R44 15K 1/8W Metal Film 4 R85, R89, R95, R100 18K 1/8W Metal Film 4 R79, R124, R126, R127 22K 1/8W Metal Film 2 R12, R57 22K 1/4W Metal Film 2 R18, R43 R20, R41, R74, R101, 47K 1/8W Metal Film 11 R102, R123, R125, R128-R131 47K 1/4W Metal Film 2 R48, R114 51K 1/4W Metal Film 4 R25, R33, R62, R71 100K 1/8W Metal Film R2, R22, R31, R38, 14 R42, R47, R63, R69, R86, R88, R96, R99, R109, R112 120K B200R 10pF 50V 100pF 50V 220pF 63V 1/8W Metal Film Multiturn Preset NP0 Ceramic NP0 Ceramic Polypropylene film 6 R87, R90, R97, R98, R117, R120 RESISTORS VARIABLE 4 PR1-PR4 CAPACITORS 2 C8, C31 2 C7, C32 2 C16, C36 220pF 50V Ceramic 4 C63, C64, C69, C70 330pF 50V 1nF 63V 1nF 63V 1nF 50V 4.7nF 50V 10nF 63V Ceramic Polypropylene Polypropylene Ceramic Ceramic Polypropylene film 4 C6, C51, C75, C76 2 C4, C49 2 C13, C14 2 C73, C74 4 C3, C45, C62, C72 2 C17, C35 Tolerance Factory P/N 5% 1072-208330E000 1% 5% 1074-707330E000 1% 10% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 10% 1062-001412E000 5% 1181-100042-000 5% 1181-101042-000 10% 5% 1100-221042-000 5% 1100-331042-000 5% 1114-102052E000 5% 1114-102052E000 10% 1100-102043-000 10% 1100-472043-000 10% AP19797/6 Notes Note: resistors, capacitors and other 'generic' electronic components are not usually stocked by the manufacturer. Please obtain these locally. 34 Cambridge Azur 740A Amp PCB Assembly BOM AP Part No. Value Description/Type Qty Component Ident Type Tolerance Factory P/N AP19797/6 Notes 39nF 250V 47nF 63V 100nF 100V 100nF 100V 470nF 275V 10uF 25V 10uF 63V 47uF 16V 100uF 63V Metallised Polyester Polyester Mono Ceramic Polypropylene Met Polypropylene X2 NP Electrolytic Electrolytic NP Electrolytic Electrolytic 8 C1, C2, C46, C47, C52, C57, C58, C60 4 C9, C21, C29, C38 2 C15, C59 2 C19, C33 2 C48, C71 2 C54, C55 4 C65-C68 2 C5, C50 8 C10, C11, C22, C23, C28, C30, C39, C40 10% 10% 1117-473053-000 10% 1106-104064-001 10% 20% 20% 1105-100024-000 20% 1102-100054-000 20% 1105-470014-000 20% 1102-101054-000 100uF 25V NP Electrolytic 4 C18, C20, C34, C37 20% 1105-101024-000 220uF 63V 6800uF 63V 2 Way 8 Way 7 Way 5 Way 8 Way 200V 2A 75V 150mA 400V 1A 5V1 1/2W F8A LBC Polarised Electrolytic 105deg Electrolytic Straight Header Right Angle Pin Header Straight Header Straight Header Loudspeaker Rectifier Signal Diode Rectifier Zener Fast Blow Fuse Fuse Holder Base 4 C12, C53, C56, C61 8 C24-C27, C41-C44 CONNECTORS 2 CN1, CN4 4 CN2, CN3, CN8, CN9 1 CN5 1 CN6 1 CN7 DIODES 8 D1-D4, D12-D15 11 D5-D10, D18, D24, D25, D31, D32 10 D11, D19-D22, D26D30 2 D16, D17 FUSES 4 F1-F4 4 F1-F4 20% 20% 2300-002100-003 2370-008110E000 2300-007100E002 2300-005100-004 6/2.54/1.5/3 Fully gold plated brass with AP design knobs Stand Off PCB by 10mm 1401-141480-000 1401-140040-000 1402-511201E200 20mm Pitch (alt. Camden YN:4031140000E000) Fuse Holder Cover PY594 24.5T 0.9mm 12V 8A Output Inductor 2P2T Relay PY910 120V 100mA NPN Low Noise PF075 -120V -100mA PNP Low Noise 4 F1-F4 20mm Pitch (alt. Camden YN:4034140000E000) INDUCTORS 2 L1, L2 RELAY 2 RL1, RL2 ME11-012-2Z4 TRANSISTORS Q1, Q6, Q7, Q15, 8 Q23, Q24, Q26, 2SC2240GR Q32 3203-874801-000 4050-110122-001 AP13772/1 1300-224000E100 2 Q2, Q27 2SA970GR 1301-970000-100 Fit with flat side of TO92 away from main heatsink PY220 -300V -500mA PF075 PY537 -120V -100mA 300V 500mA PNP Signal PNP Low Noise NPN Signal Q3, Q4, Q8, Q25, 13 Q28-Q30, Q33, MPSA92 Q39, Q42, Q46-Q48 2 Q5, Q11 2SA970GR 2 Q9, Q10 MPSA42 1301-920000-100 1301-970000-100 1300-420000-100 Q5/Q11 Matched to 2% Q9/Q10 Matched to 2% Note: resistors, capacitors and other 'generic' electronic components are not usually stocked by the manufacturer. Please obtain these locally. 35 Cambridge Azur 740A Amp PCB Assembly BOM AP Part No. Value Description/Type Qty PY537 300V 500mA NPN Signal 14 PF075 -120V -100mA PNP Low Noise 2 PY537 300V 500mA NPN Signal 2 -120V -100mA PNP Low Noise 2 PF075 30V 500mA NPN Darlington 2 PY016 -160V 15A PNP Power 4 PY010 160V 15A NPN Power 4 Component Ident Q12, Q13, Q17, Q18, Q31, Q36Q38, Q40, Q41, Q43-Q45, Q49 Q14, Q16 Q19, Q20 Q21, Q22 Q34, Q35 Q51, Q53, Q56, Q58 Q52, Q54, Q55, Q57 Type MPSA42 2SA970GR MPSA42 2SA970GR MPSA14 SAP15PY SAP15NY Tolerance Factory P/N AP19797/6 Notes 1300-420000-100 1301-970000-100 1300-420000-100 1301-970000-100 1300-140000-100 1301-150000-700 Q19/Q20 Matched to 2% Q21/Q22 Matched to 2% 1300-150000-700 Note: resistors, capacitors and other 'generic' electronic components are not usually stocked by the manufacturer. Please obtain these locally. 36 Cambridge Audio Azur 740A Amplifier +12V R47 10K 0805 Thick Film +5V CN1 &RQWURO%XV,5 10 $%863&%'*QG 9 $%86,5 8 $%866WDWXV 7 $%863&%9 6 5 4 3 2 1 FFC Connector ABUS Control Signals C1 10uF 16V Electrolytic ABUS STATUS CB PASS THRU RC5 EN RC5 TX FP IR On/Off SW1 2 1 4 3 6 5 8 7 DPL-04K Black Piano DIP Switch RC5 EN C2 100nF 25V 0805 Ceramic LOGIC GND R50 10K 0805 Thick Film Q1 BC846 NPN Small Signal LOGIC GND EMITTER IN (MODULATED IR) 3.5mm JACK LOGIC GND Cambridge Control Bus +5V CN6 R49 220R 0805 Thick Film D9 MV50640 Red LED CKX-3.5-12 M2 AP17339/3 IR Demodulator U7 IR receiver IR Diode +5V 3 GND 2 OPT 1 TSOP34836 36KHz R46 47R 0805 Thick Film C33 100nF 25V 0805 Ceramic LOGIC GND C32 10uF 16V Electrolytic D1 MV50640 Red LED CN2 3 2 1 3 Way Straight Header RIGHT C36 C11 1nF 50V R24 0805 NP0 Ceramic 1K 0805 Thick Film 47uF 25V Polarised Electrolytic C9 47uF 25V Polarised Electrolytic ABUS GND ABUS GND C30 100uF 16V Polarised Electolytic +12V LEFT C10 47uF 25V Polarised Electrolytic R8 10K 0805 Thick Film R7 4K7 0805 Thick Film ABUS STATUS R6 27K 0805 Thick Film Q3 BC846 NPN Small Signal Abus Powered Circuitry Q2 BC856B PNP Small Signal R10 100R 0805 Thick Film R9 100R 0805 Thick Film R15 10K 0805 Thick Film R16 10K 0805 Thick Film M1 AP17339/3 IR Demodulator U3 IR receiver IR Diode +5V 3 GND 2 OPT 1 TSOP34837 37KHz LOGIC GND +5V ABUS GND R51 47R 0805 Thick Film C7 10uF 16V Electrolytic C8 100nF 25V 0805 Ceramic LOGIC GND D3 BAS16 D4 Signal Diode BZX84C2V7 D5 Zener Diode U6 L7812 Regulator 3 VO 1 VI +24V 100R 1/4W Fusible FR1 D7 2 CN5 +24V IN +24V 1 2 GND R48 10K 0805 Thick Film C28 33uF 25V C31 Low ESR Electrolytic 100uF 16V Polarised Electolytic R41 ABUS GND 150K 0805 Thick Film R40 5 120K 0805 Thick Film 6 R42 120K 0805 Thick Film R39 150K 0805 Thick Film C29 100nF 50V 1206 Ceramic ABUS GND U5:B 7 NJM5532M Op Amp R43 150K 0805 Thick Film C25 10pF 50V 0805 NP0 Ceramic C27 100nF 50V 1206 Ceramic R44 47R 0805 Thick Film ABUS GND +24V C23 C26 1N4004 Rectifier Diode Low ESR Electrolytic 220uF 35V C34 100nF 50V Monolythic Ceramic C35 Ceramic 1nF 50V 3 RDC-020-14A ABUS GND C22 10uF 35V Non Polarised Electrolytic C24 47pF 50V 0805 NP0 Ceramic F1 A-BUS A KEYPAD A 8 LEFT AUDIO 7 6 IR 5 STATUS 4 RIGHT AUDIO 3 2 POWER 1 CN4 R38 120K 0805 Thick Film R35 120K 0805 Thick Film U5:A 3 2 4 8 100nF 25V 0805 Ceramic 1 NJM5532M Op Amp ABUS GND R37 150K 0805 Thick Film C19 ABUS GND R36 C21 47R 0805 Thick Film 10uF 35V Non Polarised Electrolytic C20 47pF 50V 0805 NP0 Ceramic ABUS GND 30VDC 1.1A Polyfuse RJ45 ABUS GND R30 120K 0805 Thick Film R32 120K 0805 Thick Film R31 150K 0805 Thick Film R25 120K 0805 Thick Film R26 150K 0805 Thick Film R28 120K 0805 Thick Film 10pF 50V 0805 NP0 Ceramic U4:B 5 7 6 NJM5532M Op Amp C18 R33 10pF 50V 0805 NP0 Ceramic 150K 0805 Thick Film +24V C16 R34 C15 47R 0805 Thick Film 10uF 35V Non Polarised Electrolytic C17 47pF 50V 0805 NP0 Ceramic ABUS GND U4:A 3 2 4 8 100nF 25V 0805 Ceramic 1 NJM5532M Op Amp ABUS GND ABUS GND R29 47R 0805 Thick Film C14 10uF 35V Non Polarised Electrolytic C13 47pF 50V 0805 NP0 Ceramic R27 ABUS GND F2 30VDC 1.1A Polyfuse A-BUS B KEYPAD B RIGHT AUDIO LEFT AUDIO IR STATUS POWER CN3 8 7 6 5 4 3 2 1 RJ45 ABUS GND 150K 0805 Thick Film C12 10pF 50V 0805 NP0 Ceramic U1:C 8 10 9 HEF4011BT VSS=LOGIC GND VDD=+5V CONTROL BUS IN U1:D 13 11 12 HEF4011BT VSS=LOGIC GND VDD=+5V CN9:A R5 U2 1 1 6 3 AV2-8.4-10 220R 0805 Thick Film 5 2 3 4 NC 4N25 Opto Isolator +5V CB PASS THRU C6 100nF 25V 0805 Ceramic R2 10K 0805 Thick Film U1:B 5 4 6 HEF4011BT VSS=LOGIC GND VDD=+5V RC5 TX LOGIC GND LOGIC GND R1 10K 0805 Thick Film D6 BAS16 Signal Diode U1:A 1 2 HEF4011BT VSS=LOGIC GND VDD=+5V CONTROL BUS OUT R3 3 100R 0805 Thick Film CN9:B 2 4 AV2-8.4-10 C5 1nF 50V 0805 NP0 Ceramic R17 470R 0805 Thick Film R18 10K 0805 Thick Film +5V C3 100nF 25V 0805 Ceramic LOGIC GND R4 C4 2R2 100nF 25V 1/4W Metal Film 0805 Ceramic ABUS GND LOGIC GND BZX84C2V7 Zener Diode +12V Q4 BC846 NPN Small Signal R19 4K7 0805 Thick Film ABUS GND R23 100R 0805 Thick Film R20 100R 0805 Thick Film R14 100R 0805 Thick Film R11 100R 0805 Thick Film R21 27K 0805 Thick Film R22 27K 0805 Thick Film ABUS GND R12 27K 0805 Thick Film R13 27K 0805 Thick Film ABUS GND CN7 1 2 CKX-3.5-10 Green 3.5mm Jack Vertical CN8 3 4 CKX-3.5-10 Green 3.5mm Jack Vertical LOGIC GND LOGIC GND To enhance viewing, please print to A3 AP19925/1 Abus PCB Circuit Diagram 37 D1 R46 SW1 Cambridge Audio Azur 740A Amplifier CN9 CN5 C5 C4 R5 R3 R4 U2 C3 R2 R1 U1 R51 C2 C6 R13 R14 CN8 R12 R22 R11 R23 CN7 R21 R20 Q3 Q2 R15 Q4 R19 R10 R6 R7 R8 R9 U3 R16 D6 D5 M1 R17 R18 D3 D4 C11 C7 C10 R24 C8 Q1 CN1 C1 R50 C9 CN3 C13 R29 R28 C12 R27 R25 R26 CN2 C36 F1 F2 C14 C15 D7 CN4 C21 C22 FR1 C16 U4 R30 C20 C17 R36 R34R35 C18C19 R33 R37 R32 R38 R39 R31 C23 U5 R40 C24 R44 C25 R43 R42 R41 C35 C34 U6 C27 C29 C26 C28 R47 C30 R48 C31 CN6 R49 D9 M2 U7 C33 C32 To enhance viewing, please print to A3 AP19925/1 Abus PCB Board Layout (Top Side) 38 Cambridge Audio Azur 740A Amplifier To enhance viewing, please print to A3 AP19925/1 Abus PCB Board Layout (Bottom Side) 39 Cambridge Audio Azur 740A ABUS Hub PCB Assembly BOM AP Part No Value Description/Type Qty Component Ident 2R2 47R 100R 100R 220R 470R 1K 4K7 10K 27K 120K 1/4W Metal Film 0805 Thick Film 1/4W Fusible 0805 Thick Film 0805 Thick Film 0805 Thick Film 0805 Thick Film 0805 Thick Film 0805 Thick Film 0805 Thick Film 0805 Thick Film RESISTORS 1 R4 6 R29, R34, R36, R44, R46, R51 1 FR1 7 R3, R9-R11, R14, R20, R23 2 R5, R49 1 R17 1 R24 2 R7, R19 R1, R2, R8, R15, R16, 9 R18, R47, R48, R50 5 R6, R12, R13, R21, R22 8 R25, R28, R30, R32, R35, R38, R40, R42 150K 0805 Thick Film R26, R27, R31, R33, 8 R37, R39, R41, R43 CAPACITORS 10pF 50V 0805 NP0 Ceramic 4 C12, C18, C19, C25 47pF 50V 1nF 50V 1nF 50V 100nF 25V 100nF 50V 0805 NP0 Ceramic 0805 NP0 Ceramic Ceramic 0805 Ceramic 1206 Ceramic 4 C13, C17, C20, C24 2 C5, C11 1 C35 8 C2-C4, C6, C8, C16, C23, C33 2 C27, C29 100nF 50V Monolythic Ceramic 1 C34 10uF 16V 10uF 35V 33uF 25V 47uF 25V Electrolytic Non Polarised Electrolytic Low ESR Electrolytic Polarised Electrolytic 3 C1, C7, C32 4 C14, C15, C21, C22 1 C28 3 C9, C10, C36 100uF 16V Polarised Electolytic 2 220uF 35V Low ESR Electrolytic 1 10 Way 3 Way FFC Connector 1 Straight Header 1 C30, C31 C26 CONNECTORS CN1 CN2 RJ45 2 CN3, CN4 DC Jack 1 CN5 Type Tolerance Factory P/N AP19929/1 NOTES 1% 1% 5% Stand off PCB by 5mm 1% 1% 1% 1% 1% 1% 1% 1% 1% 5% 5% 5% 10% 1100-102043-000 10% 10% 1189-104042-400 10% 1100-104043-000 20% 1102-100014-000 20% 20% 20% 1102-470024-000 20% 20% 1102-101014-000 2300-003100-004 2399-008919E000 2303-003911E300 Note: resistors, capacitors and other 'generic' electronic components are not usually stocked by the manufacturer. Please obtain these locally. 40 Cambridge Audio Azur 740A ABUS Hub PCB Assembly BOM AP Part No Value Description/Type Qty Component Ident Type Tolerance Factory P/N AP19929/1 NOTES Headphone Jack 3.5mm 1 Green 3.5mm Jack Vertical 2 2 Way Horizontal Phono 1 Red LED 2 CN6 CN7, CN8 CN9 DIODES D1, D9 2320-003911E007 2320-004911E002 Must Have 2330-004900E002 Orange Inserts 3100-506400-000 75V 300mA Signal Diode 2 D3, D6 1400-160001-400 2.7v Zener Diode 2 D4, D5 1402-842701-400 400V 1A Rectifier Diode 30VDC 1.1A Polyfuse Quad 2 Input NAND Gate PY1144 PY1007 37KHz Opto Isolator IR Receiver 1 D7 FUSES 2 F1, F2 INTEGRATED CIRCUITS 1 U1 HEF4011BT 1 U2 4N25 1 U3 TSOP34837 1401-140040-000 4030-301100-001 4140-110102E100 4142-500050-001 CD4011BCM Fairchild / MC14011BD ON Add X to PN for VDE app. 3001-348370-000 Op Amp 2 U4, U5 NJM5532M 4155-320101-600 12V 1A Regulator 1 U6 L7812 4178-120302-600 PY755 36KHz IR Receiver 1 U7 TSOP34836 MODULES IR Demodulator 2 M1, M2 TRANSISTORS 65V 100mA NPN Small Signal 3 Q1, Q3, Q4 BC846 3001-348360-000 6074-150001-000 1300-846000-500 -65V 100mA PNP Small Signal 1 Q2 BC856B 1301-856000-500 Note: resistors, capacitors and other 'generic' electronic components are not usually stocked by the manufacturer. Please obtain these locally. 41 Cambridge Audio Azur 740A Amplifier To Mains Switch W22 W24 W23 W25 WIRE1 110mm Long +5mm Strip and Tin Black 18 AWG Insulated Wire WIRE2 110mm Long +5mm Strip and Tin Black 18 AWG Insulated Wire CN3 L E N SS-7B-1 IEC Socket earth W11 Switch W12 Switch C2 X1/Y1 Mains Rated 1nF 400V S1 Chassis Connection C1 X1/Y1 Mains Rated 1nF 400V FU5 T8AL Slow Blow Fuse C3 X1 Mains Rated 47nF 275V W9 Transformer ES Screen connection Mains Toroid TRANSFORMER W1 8 RL1:C 6 7 W15 W2 BROWN/BLACK 2P2T Relay 12V 8A 5 RL1:B 3 4 2P2T Relay 12V 8A W13 W18 BLUE/WHITE W19 High Power Secondaries Power Amp supplies 8 RL2:C 6 7 2P2T Relay 12V 8A 5 RL2:B 3 4 2P2T Relay 12V 8A W3 Secondary 1 W4 W21 W20 Secondary 2 Mains Toroid TRANSFORMER W5 F1 30VDC 1.1A Polyfuse W6 W7 Low Power secondary F2 30VDC 1.1A Polyfuse CN1 1 2 3 3 Way Straight Header CN4 3 2 1 3 Way Straight Header R3 220R 2W Carbon D1 Rectifier Diode 1N4004 RL1:A 2 1 2P2T Relay 12V 8A D11 Rectifier Diode 1N4004 RL2:A 2 1 12V 8A 2P2T Relay R24 R2 1k 1/8W Metal Film 1k Q3 1/8W Metal Film MPSA14 NPN Darlington R1 10k 1/8W Metal Film Q4 MPSA14 NPN Darlington R25 10k 1/8W Metal Film To enhance viewing, please print to A3 AP19789/2 Mains PCB Circuit Diagram (Mains) 42 Cambridge Audio Azur 740A Amplifier To enhance viewing, please print to A3 AP19789/5 Mains PCB Board Layout (Top Side) 43 Cambridge Audio Azur 740A Amplifier To enhance viewing, please print to A3 AP19789/5 Mains PCB Board Layout (Bottom Side) 44 Cambridge Azur 740A Mains PCB Assembly BOM AP Part No. Value Description/Type Qty 220R 1k 10k 2W Carbon 1 1/8W Metal Film 2 1/8W Metal Film 2 1nF 400V X1/Y1 Mains Rated 2 47nF 275V X1 Mains Rated 1 3 Way 3 Pin 3 Way Straight Header 1 IEC Socket 1 Straight Header 1 400V 1A Rectifier Diode 2 30VDC 1.1A Polyfuse 2 T8AL Slow Blow Fuse 1 Fuse Holder Base 1 Fuse Holder Cover 1 PY594 12V 8A 2P2T Relay 2 PY1211 30V 500mA NPN Darlington 2 Component Ident RESISTORS R3 R2, R24 R1, R25 CAPACITORS C1, C2 C3 CONNECTORS CN1 CN3 CN4 DIODES D1, D11 FUSES F1, F2 FU5 FU5 Type Tolerance Factory P/N 10% 1% 1% 20% 1119-102104-000 20% 1110-473094E000 2300-003400-001 2336-003910-002 2300-003100-004 1401-140040-000 4030-301100-001 20mm Pitch FU5 RELAY RL1, RL2 TRANSISTORS Q3, Q4 20mm Pitch ME11-0122Z4 MPSA14 4050-110122-001 1300-140000-100 AP19792/5 Notes Note: resistors, capacitors and other 'generic' electronic components are not usually stocked by the manufacturer. Please obtain these locally. 45 Cambridge Audio Azur 740A Amplifer IC Pin Layout Details BD140 Input PCB - (Q1 & Q4) Preamp PCB (Q1 & Q5) BD139 Input PCB - (Q2, Q3, Q5 & Q6) Preamp PCB (Q2, Q3, Q4 & Q6) BC327-25 Input PCB - (Q7) Preamp PCB (Q9, Q11, Q12 & Q14) BC337-25 Input PCB - (Q8) Front Panel PCB (Q1, Q2 & Q3) Preamp PCB (Q7, Q8 & Q10) MPSA14 Input PCB - (Q9) Main PCB (Q3 & Q4) Amp PCB (Q34 & Q35) Preamp PCB (Q13) NE5532 Input PCB - (U1, U5, U6, U7, U9, U10, U12, U13, U14, U15, U16, U17 & U18) L7915CV Input PCB - (U2) 46 L7805 Input PCB - (U3) L7815CV Input PCB - (U4) LM393A Input PCB - (U8) TC9163AF Input PCB - (U11) Preamp PCB (U10) PIC16F877A-I/P Front Panel PCB - (U1) M74HC4094B Front Panel PCB - (U2) 47 TSOP34836 Front Panel PCB - (U3) M74HC02 Front Panel PCB - (U4) NE5532P Front Panel PCB - (U100 & U200) Preamp PCB (U1, U9, U11, U12, U15, U16, U17, U18, U19 & U20) 2SC2240GR Amp PCB - (Q1, Q6, Q7, Q15, Q23, Q24, Q26 & Q32) 2SA970GR Amp PCB - (Q2, Q5, Q11, Q14, Q16, Q21, Q22 & Q27) 48 MPSA92 Amp PCB - (Q3, Q4, Q8, Q25, Q28, Q29, Q30, Q33, Q39, Q42, Q46, Q47 & Q48) MPSA42 Amp PCB - (Q9, Q10, Q12, Q13, Q17, Q18, Q19, Q20, Q31, Q36, Q37, Q38, Q40, Q41, Q43, Q44, Q45 & Q49) SAP15PY Amp PCB - (Q51, Q53, Q56 & Q58) SAP15NY Amp PCB - (Q52, Q54, Q55 & Q57) YAC526 Preamp PCB - (U2) L7815 Preamp PCB - (U3) 49 L7915 Preamp PCB - (U4) L7805 Preamp PCB - (U5) LM337T Preamp PCB - (U6 & U7) LM317T Preamp PCB - (U8) LM393AP Preamp PCB - (U13 & U14) HEF4011BT Abus Hub PCB - (U1) OP4N25 Abus Hub PCB - (U2) TSOP34837 Abus Hub PCB - (U3) 50 NJM5532M Abus Hub PCB - (U4 & U5) L7812 Abus Hub PCB - (U6) TSOP34836 Abus Hub PCB - (U7) BC846 Abus Hub PCB - (Q1, Q3 & Q4) BC856B Abus Hub PCB - (Q2) 51 Cambridge Azur 740A Amplifier Service Mode Instructions Press and hold the mode button while turning the rear panel mains power on. Please note: The `counters' menu is particularly useful to examine the history of use/misuse of the amplifier. The LCD display will show SERVICE with these menu options: DC DT: Enable/disable the built-in DC error detection circuit (use with caution!). LCD TEST: Press repeatedly (7 steps) to check LCD segments until all segments are lit. TEMP DT: Enable/disable the built-in temperature detection and protection circuit (use with caution!). COUNTERS: .This option accesses the following event counters: CL Clipping events DC DC detection events OV Overload events TM Over-temperature events SH Short circuit output events ON Number of hours used RESET: Pressing this will reset all counters to zero. V1.1 etc The current software version (related to the hex file installed) 52 Cambridge Azur 740A Amplifier Software Update Instructions Should it become necessary to update the front panel control software in this model, you will need to obtain a suitable `PIC' programmer, and the updated `hex' file from the service department at Cambridge Audio. One such programmer is the Kanda PIC-HH0010, and instructions follow on using this device. To perform the update, simply connect the lead from the programmer to the socket provided on the reverse of the front panel PCB. Do not power on the unit, as all power for re-programming is taken from the programmer itself. Once the appropriate hex file is loaded to the programmer, pressing the red download button should be followed shortly by a green light on the programmer to indicate successful download. To confirm the software revision number contained in the 740A, access the service mode. Connector on rear of front panel: 53 KandaPICHandHeldProgrammerModificationInstructions ToProgrammeCambridgeAudioProducts: ProgrammerUsed SourcedFrom:http://www.kanda.com TherearetwoproductcodeswhichwillgetyouthesameprogrammerthatisusedatAP: 1. PICHH0010.ThiscomeswiththePCPICUploadSoftwareonCD. 2. PICHH0020.ThiscomeswithoutthePCUploadSoftwareandisslightlycheaper. Note:Someprogrammersaresuppliedwithflatbatteries.PleasereplacewithagoodqualityPP3battery whenrequired. Youalsoneedtopurchaseaflat06way250mmcableassembly(forexamplefromFarnell,ProductCode:303 2243). Procedure 1. InstallthePCSoftwareontoyourPCwiththesuppliedCDfollowingtheonscreeninstructions.Ifyou alreadyhavethesoftwareinstalled,thereisnoneedtoreinstallthesoftwareagain. 2. Unpackthefollowingfromtheprogrammerkitbox(seepicturebelow): a. Yellowprogrammer. b. 10pinIDCtoparallelconverter. c. 10pinIDCsockettowireassembly. d. 10pinIDCto10pinIDCcable. 3. Takethesockettowireassemblyandcuttheblackheaderendsoffeachwire(seepicturebelow). 54 4. Cuttheorangewire,thenstripandtin5mmoffeachotherwire(seepicturebelow). 5. TaketheFlat06Way250mmcableassemblyandcutoffoneoftheplugs.Stripandtin5mmoffeach wire(seepicturebelow). 6. Usingthetablebelow,soldereachwiretogetherasfollows(seenextpage): 10pinIDCsockettowireassembly Flat06way250mmcableassembly Redwire towire1(wirewiththeredstripeonit) Bluewire towire2 Yellowwire towire3 Greenwire towire4 55 Brownwire 7. Wrapinsulationtapearoundeachsolderjoint(seepicturebelow). towire5 8. Heatshrinktheassemblyjointsforaddedprotectionandtofinish. 9. Loadupthe"PICkeyfobProgrammer"softwareonyourPC. 10. SavethesuppliedPICHEXfiletoasuitablelocationonyourPC. 11. Selectthecorrect"PICFamily"and"Device"forthePICyouwanttoprogramme. 12. Makesurethe"ProgramUserID"boxisticked. 13. Makesurethe"MatchDeviceID"and"VerifyConfigurationBytes"areunticked. 14. SelectthecorrectfilelocationofthesoftwareyouwanttouploadtothePIC,bypressingthe"Browse" button,locatingthecorrectHEXfileandselecting"Open".Thepicturebelowshowsthesetupforthe PCsoftwareusingthe340TTunersoftwareasanexample. 56 15. Connectthe"yellowprogrammer"tothePC'sparallelportusingthe10pinIDCtoparallelconverter and10pinIDCto10pinIDCcable. 16. Pressthe"Upload"buttoninthe"PICkeyfobProgrammer"windowtostarttheuploadprocessintothe PICprogrammer. 17. Thefollowingwindowwillappearwhenthesoftwareisbeinguploaded: 18. Whenthesoftwarehasuploaded,theabovewindowwillclose.Nowpressonthe"Finish"buttonon theotherwindowtocompletetheprocess.ThePCsoftwarewillthenclose. 57 19. Ifyougetanyerrormessages,repeattheprocess.Note:Thebatterymaybelowandneedsreplacing. 20. Disconnecttheprogrammer(withthe10pinIDCto10pinIDCcable)fromthe10pinIDCtoparallel converter. 21. Connectthemodifiedcableassemblytothe10pinIDCto10pinIDCcablesocket. 22. ProgrammetheCambridgeAudiounitaccordingtotheseparateinstructionssupplied,where appropriate. Theprocessisnowcomplete. 58 CN6 6 Way Right Angle Header 3 2 1 6 5 4 RBB RC RA RTB R RA RC RTB RIGHT LK38 -15V CN5 8 7 6 5 4 3 2 1 +15V SHIELD_SUPPLY 24 AWG R 8 Way Right Angle Header L RA LA RBB C101 1.5nF 63V Met. Polyester R103 4K7 1/4W Metal Film RC LC LTB LEFT C201 1.5nF 63V Met. Polyester R203 4K7 1/4W Metal Film LBB LA LC LBB LC LA LTB 2 1 3 6 5 4 L CN7 6 Way Right Angle Header -15V C104 CA2 1 2 3 4 5 6 47nF 63V Met. Polyester R C103 10pF 50V NP0 Ceramic See AP20043/1 6 Way to 4 Way Screened Audio cable U100:B NE5532P 6 Audio Op Amp 7 5 U100:A 4 NE5532P 3 Audio Op Amp R106 1 2 2K2 R R107 2K2 1/4W Metal Film 1/4W Metal Film C107 8 R C106 10pF 50V NP0 Ceramic 47nF 63V Met. Polyester +15V R -15V C204 LK39 24 AWG R LK40 R 47nF 63V Met. Polyester L C203 10pF 50V NP0 Ceramic L 6 5 24 AWG U200:BL NE5532P Audio Op Amp 7 U200:A 4 NE5532P L R207 3 Audio Op Amp R206 1 2 2k2 1/4W Metal Film 2K2 1/4W Metal Film C207 8 L C206 10pF 50V NP0 Ceramic L +15V 47nF 63V Met. Polyester CA1 1 2 3 4 5 6 See AP20044/1 6 Way to 5 Way Screened Audio cable 4 Way CN10Straight Header 1 2 3 4 1 2 3 4 SHIELD_R2 CN4 4 3 2 1 4 Way Right Angle Header SHIELD_L2 LK37 24 AWG R18 1K1 1/8W Metal Film R20 1K1 1/8W Metal Film R24 R23 2K2 2K2 1/8W Metal Film 1/8W Metal Film VR1:A 5k Push Action Linear Pot VR2:B 5k Push Action Linear Pot C10 680nF 63V Met. Polyester VR1:B 5k Push Action Linear Pot C18 680nF 63V Met. Polyester 5k VR2:A Push Action Linear Pot R21 1K1 1/8W Metal Film R22 1K1 1/8W Metal Film R25 2K2 1/8W Metal Film LK1 24 AWG R26 2K2 1/8W Metal Film 1 2 3 4 5 1 2 3 4 5 GUARD CN8 5 Way 59 Straight Header +5V +5V LK7 L24KA1W4G 24 AWG LK25 24LAKW3G6 24LAKW1G2 LK424 AWG 24 AWG +5V +5V LK11 24LAKW3G2 24 AWG +5V +5V LK3 2L4KA3W1G 24 AWG CN11 1 2 3 4 5 6 6 Way +5V PGC PGD MCLR +5V COL 1 SW1 COL 2 SW2 KPT-1105A INPUT 1 SW4 KPT-1105A INPUT 2 1. SW5 ROW 2 KPT-1105A INPUT 4 SW7 LK15 KPT-1105A INPUT 5 SW8 LCD STR. LK24LK13 LCD STR 24 AWG 24 AWG R27 47K 1/4W Metal Film R29 47K 1/4W Metal Film ROW 3 R30 47K 1/4W Metal Film ROW 4 KPT-1105A ON/STBY SW10 2. 24 AWGKPT-1105A SPEAKER LK9 +5V +5V LCD DECOUPLE R19 100R 1/4W Metal Film C9 100nF 50V Mono Ceramic C4 100nF 50V Mono Ceramic C7 C22 10uF 16V 47nF 50V Electrolytic Ceramic LK35 124 AWG CN1 2 1a 1 2a 2 U2 3a 4a 5a 6a 7a 8a 3 4 5 6 7 8 4 LK33 5 LK34 6 24LAWKG30 7 24 AWG 14 24 AWG13 Q0 Q1 Q2 Q3 Q4 Q5 15 2x8 Way 16 DIL Bottom Entry HLeKad2er6 12 Q6 11 Q7 LK29 LK27 24 AWG 24 AWGLK28 9 QS 10 QS D2 CLK 3 STB 1 OE 15 VCC 16 GND 8 24 AWG M74HC4094B1R 24 AWG LCD DISPLAY CONN RS E LCD STR. +5V KPT-1105A DIRECT L2K4 1AW7 G 24 AWG 1 2 3 4 LCD STR 5 6 LK23 C5 24 AWG LK20 24 AWG BRIGHT ON/OFF 7 8 9 10 11 12 22pF 50V NP0 Ceramic C6 X1 Strip Cut Crystal 13 14 15 16 4MHz 17 C11 22pF 50V NP0 Ceramic LK16 18 19 20 10nF 50V Ceramic 24 AWG +5V 1 R7 P5 10K 1/4W Metal Film R12 220R 1/4W Metal Film ON/OFF R3 1K2 1/4W Metal Film Q1 BC337-25 NPN Signal D1 Blue Azur LED 1 Vss 1 Vdd 2 Vo 3 RS 4 R/W 5 E 6 D0 7 D1 8 D2 9 D3 10 D4 11 D5 12 D6 13 D7 14 LED A 15 LED K 16 CW CCW PR1 Multiturn 2 500R R1 56R 1/4W Metal Film 3 R6 300R 1/4W Metal Film 2 16 1 15 LCD CONN ORIENTATION FROM FRONT Q2 BC337-25 NPN Signal R2 56R 1/4W Metal Film POWER AMP RELAY LK18 24 AWG R11 10K 1/4W Metal Film R5 10K 1/4W Metal Film BRIGHT R10 10K 1/4W Metal Film Q3 BC337-25 NPN Signal R15 220R 1/4W Metal Film +5V TO POWER AMP PCB COL 3 SW3 KPT-1105A INPUT 3 SW6 R31 47K 1/4W Metal Film +5V SPEAKER B RELAY SPEAKER A RELAY PREAMP RELAY VI/SHORT CLIP DETECT MAINS FAIL DC OFFSET OVER TEMP CN9 1 2 3 4 5 6 7 8 9 10 RC5 BLOCK RC5 TX PHONES DETECT DIRECT RELAY PIC IR ON/OFF 1 2 3 4 5 6 L24KA2WG CN2 6 Way Right Angle Header TO PRE AMP PCB KPT-1105A TAPE MON SW9 KPT-1105A +5V MODE +5V 10K 10 Way R32 Right Angle Header 100K CONTROL BUS IR 1/4W Metal Film VOLUME STROBE POWER AMP RELAY ABUS IR INPUT STROBE SERIAL DATA SERIAL CLOCK CN3 1 2 3 4 5 6 7 8 9 1/4W Metal Film 9 Way R4 MCLR LK6 U1 24 AWG MCLR/VPP RB7/PGD RA0/AN0 RB6/PGC RA1/AN1 RB5 RA2/AN2/Vref-/CVref RB4 RA3/AN3/VREF+ RB3/PGM RA4/T0CKI/C1OUT RB2 RA5/AN4/SS/C2OUT RB1 RE0/RD/AN5 RB0/INT RE1/WR/AN6 VDD RE2/CS/AN7 VSS VDD RD7/PSP7 VSS RD6/PSP6 OSC1/CLKIN RD5/PSP5 OSC2/CLKOUT RD4/PSP4 RCO/T1OSO/T1CKRI C7/RX/DT RC1/T1OSI/CCP2 RC6/TX/CK RC2/CCP1 RC5/SDO RC3/SCK/SCL RC4/SDI/SDA RD0/PSP0 RD3/PSP3 RD1/PSP1 RD2/PSP2 PGD 40 PGC 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 PIC16F877A-I/P PROGRAMMED_WITH=AP20357/x R28 R13 47K 1/8W Metal Film R39 1K 1/8W Metal Film D4 1N4148 Signal Diode DIRECT RELAY PHONES DETECT RC5 TX RC5 BLOCK OVER TEMP DC OFFSET MAINS FAIL CLIP DETECT Right Angle Header CONTROL BUS IR LK10 CONTROL BUS IR 24 AWG R811K/4W Metal Film ROT1 R9 1 A SW 2 B SW 1K 3 C GND 1/4W Metal Film 4 FIX1 +5V C1 C2 5 FIX2 100nF 50V Mono Ceramic 100nF 50V Mono Ceramic Noble Rotary Encoder 1K 1/8W Metal Film R16 R17 VI/SHORT PREAMP RELAY SPEAKER A RELAY SPEAKER B RELAY SERIAL CLOCK SERIAL DATA C3 47nF 50V Ceramic +5V C8 10uF 16V Electrolytic PIC IR ON/OFF 1K 1/8W Metal Film INPUT STROBE R33 ABUS IR R36 47K POWER AMP RELAY 47K 1/4W Metal Film VOLUME STROBE 1/4W Metal Film R34 +5V R14 47R 1/4W Metal Film U3 47K 1/4W Metal Film U4:D LK8 13 10K 1/4W Metal Film U4:B 6 12 LK5 4 5 1 OPT 2 GND 3 +5V TSOP34836 36KHz C16 C17 100nF 50V 10uF 16V Mono Ceramic Electrolytic 11 24 AWG 24 AWG VCC=+5V +5V VCC=+5V M74HC02 M74HC02 GND=GND GND=GND P2 P3 P4 P1 LK22 U4:C +5V 9 10 8 VCC=+5V M74HC02 GND=GND U4:A 3 1 2 VCC=+5V M74HC02 GND=GND R35 47K 1/8W Metal Film C12 10nF 50V Ceramic C13 10nF 50V Ceramic C14 10nF 50V 6C0eramic C15 10nF 50V Ceramic CONTROL BUS IR 1 1 1 1 L24KA2W1G 24 AWGAcrobat Distiller 6.0.1 (Windows)