Kenwood DV-502/503/DVF-3050/3550 Service Manual
Contents
Disassembly for Repair
How to Remove Disc in unit: Slide the lever of the mechanism from the bottom side if you cannot get the disc on the tray.
Cautions: The marking of products using lasers (Except for some areas):
CLASS 1 LASER PRODUCT
The marking is located on the rear panel and states that the component uses laser beams that have been classified as Class 1. This means the unit utilizes laser beams of a weaker class. There is no danger of hazardous radiation outside the unit.
Block Diagram
The block diagram illustrates the interconnections between various components of the DVD/CD player, including the SCART part, RCA part, digital output, main processing unit (MPEG ST15519), memory (SDRAM, FLASH MEMORY), VFD controller, and power supply (SMPS).
Circuit Description
This section details the various integrated circuits (ICs) and their pin functions, including the MPEG IC (ST15519), Audio DAC (PCM1748E), EEPROM (M24C02), FLASH MEMORY (M29F400T), SDRAM (HY57V651610BLTC-8), VFO controller (uPD16311), DC Motor Driver (KA8082), HEX Inverter (M74HCU04), and Flash Memory (M29W800AT).
It also describes the D/A Converter (PCM1748), SDRAM (KS641632D), and the internal block diagram of the D/A converter.
Wiring Diagram
The wiring diagram shows the connections between the MECHA F/E BOARD, SCART BOARD, MAIN BOARD, OUTPUT BOARD, FRONT BOARD, and POWER SUPPLY (SMPS) via various connectors (CN) and internal board connectors (CP).
PC Board (Component side view)
Illustrations of the component layout for the FRONT BOARD and OUTPUT BOARD are provided, detailing the placement of various components and ICs.
Schematic Diagram
Detailed schematic diagrams are provided for the various boards, showing component interconnections and values.
Exploded View
An exploded view diagram illustrates the physical assembly of the DVD/CD player, showing the arrangement of parts and their reference numbers.
Parts List
The parts list provides a comprehensive catalog of all components used in the unit, including their reference numbers, part numbers, descriptions, and destination markings. It also notes which parts are considered safety critical.
Specifications
Type: DVD video player system, Semiconductor laser signal read system.
D/A Conversion Section: 24 Bit D/A conversion with 8 fs and 4 fs oversampling. Signal to noise ratio is more than 98 dB, dynamic range more than 95 dB, total harmonic distortion less than 0.005% (1 kHz), and channel separation more than 95 dB (1 kHz).
Audio Section: Frequency response ranges from 4 Hz ~ 20 kHz to 4 Hz ~ 42 kHz depending on sampling frequency. Analog output level/impedance is 2 V / 1 kΩ. Digital output level/impedance is 0.5 Vp-p / 75 Ω.
Video Section: Video output format is NTSC/PAL. Video compression is MPEG-2. Composite video output level is 1 Vp-p (75 Ω load, sync. negative). S-video output level (Y-signal) is 1 Vp-p (75 Ω load, sync. negative).
General: Power consumption is 16 W. Dimensions are W: 440mm, H: 109 mm, D: 325 mm. Weight is 4.0 kg (8.8 lb).
Note: KENWOOD follows a policy of continuous advancements in development. Specifications may be changed without notice. Sufficient performance may not be exhibited at extremely cold locations.
Company Information
KENWOOD CORPORATION
14-6, Dogenzaka 1-chome, Shibuya-ku, Tokyo, 150-8501 Japan
KENWOOD SERVICE CORPORATION
P.O BOX 22745, 2201 East Dominguez St., Long Beach, CA 90801-5745, U.S.A.
Contact information for various international Kenwood branches is also provided.
