Sony CDP-M7 User Manual

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COMPACT DISC PLAYER
SERVICE MANUAL
Model Name Using Similar Mechanism NEW
CD Mechanism Type CDM38A-5BD19
Base Unit Type BU-5BD19
Optical Pick-up Type KSS-213B/K-N
MICROFILM
CDP-M7
US Model
Canadian Model
E Model
Tourist Model
SPECIFICATIONS
Design and specifications are subject to change without notice.
CDP-M7 is the CD player section
in DHC-MD7.

Sony CDP-M7 Specifications

General

Type	CD Player
Channels	2
Frequency Response	2 Hz to 20 kHz
Total Harmonic Distortion	0.003%
Signal-to-Noise Ratio	115 dB
Digital Output	Coaxial
Output Voltage	2.0 V
Power Consumption	15 W
Disc format	CD
Output	2.0V (line)
Line output	2.0V
Dimensions	430 x 100 x 280mm
Digital converter	1-bit DAC

Summary

Servicing Note

Handling Optical Pick-up Block and Base Unit

Guidelines for safely handling the optical pick-up block or base unit, including electrostatic discharge precautions.

Laser Diode Emission Check Notes

Instructions for checking laser diode emission, emphasizing safe observation distance from the objective lens.

General Information

Index to Parts and Controls

An index listing parts and controls with references to their usage details in the manual.

Disassembly Procedures

3-1. Case, Front Panel Assembly and Chassis

Procedure for disassembling the case, front panel assembly, and chassis.

3-2. Back Panel and Tray Disassembly

Steps for removing the back panel and disc tray from the unit.

3-3. Main Board and Connector Board Removal

Instructions for disassembling the main board and connector board.

3-4. Base Unit Disassembly

Procedure for disassembling the base unit of the CD player.

Electrical Adjustments

Focus Bias Adjustment

Steps for adjusting the focus bias of the optical block, including waveform checks.

S Curve and RF Level Checks

Procedures for checking the S-curve waveform and RF signal level for optimal performance.

E-F Balance and Gain Adjustments

Checks and adjustments for E-F balance and focus/tracking gain, with specific procedures.

Diagrams and Schematics

Circuit Boards Location

Diagram showing the location of various circuit boards within the unit.

IC Pin Functions and Block Diagrams

Details of IC pin functions and block diagrams for key integrated circuits in the BD section.

Schematic and Wiring Diagrams

Collection of schematic and printed wiring diagrams for Main, Panel, and BD sections.

Exploded Views

6-1. Front Panel Section Exploded View

Exploded view illustrating the front panel assembly and its components.

6-2. Back Panel and Disc Table Exploded View

Exploded view of the back panel and disc table mechanism, detailing parts.

6-3. Mechanism Deck Section Exploded View

Exploded view of the mechanism deck (CDM38A-5BD19) and its parts.

6-4. Base Unit Section Exploded View

Exploded view of the base unit (BU-5BD19) and its constituent parts.

Electrical Parts List

BD Board Parts List

Lists electrical components for the BD board, covering capacitors, connectors, ICs, transistors, and resistors.

Display Board Parts List

Details electrical components for the Display board, including resistors, capacitors, and ICs.

Main Board Parts List

Lists electrical components for the Main board, including capacitors, connectors, diodes, ICs, and resistors.

Panel and Hardware Lists

Covers parts for Panel sections and the hardware list, including switches, motors, and screws.