General Section
The regulations and safety instructions provided in the "Safety" Service Manual, part number 72010-800.00, are valid, along with any respective national deviations.
Introduction
This Supplement Service Manual documents additional TVRs in the Series TVR 37..., TVR 51..., and TVR 55.... For detailed information, refer to the TVR Overview on page 3. As from Evolution Code "BA", the TVR 5100 includes camcorder sockets (LINE/CV).
Note:
Basic instructions for servicing are given in the following Service Manuals:
- Safety, Part No. 72010-800.00
- Service Manual, Part No. 72010-524.95
- Supplement, Part No. 72010-524.98
For individual modules and for the spare part numbers, refer to the spare parts list.
Test Equipment
| Equipment | Function |
|---|
| Variable isolating transformer | Colour generator |
| Dual channel oscilloscope | AF Generator |
| Digital multimeter | Stabilized power supply |
| Millivoltmeter | Frequency counter |
The Grundig Catalog "Test and Measuring Equipment" is obtainable from:
Grundig Instruments
Test- und Messsysteme GmbH
Würzburger Str. 150, D-90766 Fürth/Bay.
Tel. 0911/703-4118, Telefax 0911/703-4130
eMail: instruments@grundig.de
Internet: http://www.grundig-instruments.deLayout of PCBs & Circuit Diagrams
Wiring Diagram TVR 51... (Page 4)
This diagram illustrates the complete wiring connections for the TVR 51 series, showing the interconnections between major components such as the picture tube, power chassis (GSPD), signal chassis (KSPUX), tuner, head amplifier, and various input/output jacks including EURO-AV and earphone connections. It provides a comprehensive overview of the system's electrical layout.
Head Amplifier Board (OHAD) - Component Side View (Page 5)
This section presents the component layout of the Head Amplifier Board (OHAD), showing the placement of various electronic components on the top side of the printed circuit board. It includes component designators and outlines for identification.
Head Amplifier Board (OHAD) - Solder Side View (Page 5)
This view displays the solder side of the Head Amplifier Board (OHAD), indicating the solder points and traces for the electronic components. It is essential for troubleshooting and repair work.
Head Amplifier Board - Headwheel Motor Control Circuit Diagram (Page 6)
This circuit diagram details the Headwheel Motor Control section of the Head Amplifier Board. It includes components like the TDA5241 IC, showing connections for motor control, position detection, and timing, crucial for the VCR's tape transport mechanism.
Head Amplifier Board - Head Amplifier Circuit Diagram (Page 7)
This diagram illustrates the Head Amplifier circuit, including STV5742DT, STV5743, and STV5744DT ICs, responsible for processing audio and video signals from the tape heads. It shows connections to the rotating transformer and signal chassis, with specific variants for FM-Audio.
Power Chassis (GSPD) Circuit Diagram (Page 8)
This circuit diagram outlines the Power Chassis (GSPD), including the MC44603P IC (7310), responsible for power supply management, demagnetization, voltage feedback, and overvoltage protection. It also shows the line output transformer and associated components, with notes on circuit changes for different TVR models.
Signal Chassis - Keyboard Control Unit (KSPUX – CO) Circuit Diagram (Page 11)
This diagram details the Keyboard Control Unit (CO) section of the Signal Chassis (KSPUX), featuring the TMP87SX39N IC (7801). It illustrates the connections for keyboard input, display control, and various system signals, including backup time and reset functions.
Signal Chassis - IN/OUT (KSPUX – IO) Circuit Diagram (Page 11)
This diagram shows the IN/OUT (IO) section of the Signal Chassis (KSPUX), detailing the circuitry for audio and video input/output connections, including those for front A/V and plug print. It highlights components related to signal routing and processing for external devices.
Signal Chassis - Standard Sound (AL) Circuit Diagram (Page 11)
This diagram illustrates the Standard Sound (AL) section of the Signal Chassis, featuring the LA7282 IC (7601). It details the audio processing circuits for playback and record, including mute functions, ripple filtering, and connections to the deck and EURO-AV output select.
Spare Parts Lists
TVR 3730 TEXT (Evolution Code AA)
| POS. NO. FIG. | PART NUMBER | QTY. | DESCRIPTION |
|---|
| 0001.000 | 75988 017 0000 | 4 | CABINET FRONT ASSY |
| 0001.500 | 75988 017 0100 | 4 | LIFT FLAP |
| 0001.600 | 75988 000 0800 | 4 | LEG SPRING |
| 0001.700 | 75988 015 0100 | 4 | GRUNDIG-LABEL |
| 0002.000 | 75988 015 0300 | 4 | SCREW FOR PICTURE TUBE |
| 0005.000 | 75988 015 0600 | 4 | CABLE CLAMP |
| 0005.100 | 75988 015 1400 | 5 | ANTENNA, LOOP |
| 0005.700 | 75988 017 4500 | 4 | HOLDER, REMOTE CONTROL |
| 0008.000 | 75988 017 0200 | 4 | SPEAKER GRILLE RIGHT CPL. |
| 0009.000 | 75988 017 0300 | 4 | SPEAKER GRILLE LEFT CPL. |
| 0018.000 | 75988 017 0400 | 4 | REAR PANEL CPL. |
| 0021.000 | 75988 022 5300 | 4 | COVER CPL. EURO-AV |
| 0022.000 | 75988 017 4000 | 4 | KNOB ON/OFF |
| 0023.000 | 75988 017 4200 | 4 | SPRING |
| 0024.000 | 75988 017 8600 | A | POWER CABLE 14"GB/05 |
| 0028.000 | 75988 015 1100 | 4 | TAPE DRIVE HOLDER, FRONT |
| 0029.000 | 75988 015 1200 | 4 | TAPE DRIVE HOLDER, REAR |
| 0031.000 | 81149 900 2200 | 4 | SCREW 3,5X16 |
| 0033.000 | 27599 005 0800 | 1 | HEAD DISC |
| 0034.000 | 75988 001 3300 | 1 | SCANNERMOTOR 2/0 |
| 0035.000 | 75988 018 1800 | 4 | SCREW, AUDIO SUPPORT |
| 0037.000 | 75988 025 3300 | 4 | AV-COVER |
| 0038.000 | 75988 017 8700 | 4 | AV-INPUT |
| 0040.000 | 27599 004 2100 | A | HEAD AMPLIFIER OHAD2/0LP |
| 75988 025 0100 | X | HSD TAPE DRIVE WDBT 2/0 |
| 27599 103 2500 | X | POWER CHASSIS GSPD14B (POWER CHASSIS, PICTURE TUBE BOARD, SOCKET BOARD) |
| 27599 101 5900 | X | SIGNAL CHASSIS KSPUG1/G2PVXTF |
| 0153.000 | 75988 019 9700 | | REMOTE CONTROL TVP 763 |
| 1010.000 | 75988 025 6000 | | LOUDSPEAKER RD102 8R 6W |
| 1100.000 | 75988 019 3100 | A | PICTURE TUBE A 34 EACC01X45 PHI |
| 5000.000 | 75988 025 6100 | A | DEGAUSSING COIL 14" |
| 8001.000 | 75988 017 0900 | | FLEXIBLE CABLE, L3-1901 (7P.) |
| 8002.000 | 75988 017 1000 | | FLEXIBLE CABLE, L8-1900 (2P.) |
| 8003.000 | 75988 003 2000 | | FLEXIBLE CABLE, L1-F4 (6P.) |
| 8004.000 | 75988 017 4700 | | FLEXIBLE CABLE, L4-1903 (3P.) |
| 8005.000 | 75988 017 1100 | | FLEXIBLE CABLE, L2-1905 (15P.) |
| 8006.000 | 75988 017 1200 | | FLEXIBLE CABLE, 1941-1902 (10P.) |
| 8007.000 | 75988 017 1300 | | FLEXIBLE CABLE, LSP-1914 (2P.) |
| 8008.000 | 75988 017 1400 | | FLEXIBLE CABLE, 1913-1967 (5P.) |
| 8011.000 | 75988 017 1500 | | FLEXIBLE CABLE, 1912-1923 (7P.) |
| 8012.000 | 75981 019 6800 | | FLEXIBLE CABLE, 1911-1922 (5P.) |
| 8013.000 | 75988 017 1800 | | FLEXIBLE CABLE, 1909-1921 (13P.) |
| 8014.000 | 75988 041 5000 | | FLEXIBLE CABLE, HA-SC (6P.) |
| 8017.000 | 75988 017 1900 | | FLEXIBLE CABLE, 1971-1935 (3P.) |
| 8018.000 | 75988 017 2000 | | FLEXIBLE CABLE, 1918-1937 (4P.) |
This is a partial list. The full spare parts list continues for various TVR models, including TVR 3730 TEXT/GB, TVR 5100, TVR 5130 TEXT, TVR 5130 TEXT/GB, TVR 5530 TEXT, and different Signal Chassis and Power Chassis versions. Each list provides detailed part numbers and descriptions for components such as tuners, connectors, diodes, ICs, coils, resistors, fuses, and transistors. For complete details, refer to the original service manual.
Important Note: The regulations and safety instructions provided in the "Safety" Service Manual, part number 72010 800 0000, are valid, as well as any respective national deviations. Subject to alteration.
