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Philips MCM765 Service Manual
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Philips MCM765 Service Manual

Philips MCM765 Service Manual

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Micro System
©
Copyright 2008 Philips Consumer Electronics B.V. Eindhoven, The Netherlands
All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or
transmitted, in any form or by any means, electronic, mechanical, photocopying, or otherwise without
the prior permission of Philips.
Published by SL 0842 Service Audio
Version 1.1
TABLE OF CONTENTS
PCBs Location ...................................................................... 1-2
Specifi cations ....................................................................... 1-3
Measurement Setup ............................................................. 1-4
Service Aids, Safety Instruction, etc ...........................1-5 to 1-7
Service Test Mode ................................................................... 2
Set Block Diagram & Set Wiring Diagram ............................... 3
Main Board & HP Board .......................................................... 4
Front Board.............................................................................. 5
Key Board ................................................................................ 6
CD Board ................................................................................. 7
Cassette Board ........................................................................ 8
Set Mechanical Exploded View & Parts List ............................ 9
Printed in The Netherlands
Subject to modification
MCM765
Page
CLASS 1
LASER PRODUCT
© 3141 785 32811
/55/77/85

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  • Page 1 LASER PRODUCT © Copyright 2008 Philips Consumer Electronics B.V. Eindhoven, The Netherlands All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, or otherwise without the prior permission of Philips.

  • Page 2: Pcbs Location

    FRONT BOARD KEY BOARD AC CORE BOARD FM TUNER MODULE MAIN BOARD SINGLE CASS DECK VERSION VARIATIONS Type /Versions: MCM765 Service policy Board in used: MAIN BOARD KEY & TOP KEY BOARD FRONT BOARD CD BOARD CASSETTE BOARD TUNER MODULE...

  • Page 3: Specifications

    SPECIFICATIONS AMPLIFIER TAPE DECK Output power ........4 x 75 W RMS* Frequency response Signal-to-noise ratio ......62 dBA (IEC) Normal tape (type I) ..80 – 12500 Hz (8 dB) Frequency response ..40 – 15000 Hz, ± 3 dB Signal-to-noise ratio Impedance loudspeakers .........

  • Page 4: Measurement Setup

    1 - 4 MEASUREMENT SETUP Tuner FM Bandpass LF Voltmeter 250Hz-15kHz e.g. PM2534 e.g. 7122 707 48001 RF Generator e.g. PM5326 S/N and distortion meter e.g. Sound Technology ST1700B Use a bandpass filter to eliminate hum (50Hz, 100Hz) and disturbance from the pilottone (19kHz, 38kHz). Tuner AM (MW,LW) Bandpass LF Voltmeter...

  • Page 5: Laser Product

    1 - 5 SERVICE AIDS WARNING All ICs and many other semi-conductors are susceptible to electrostatic discharges (ESD). Careless handling during repair can reduce life drastically. When repairing, make sure that you are connected with the same potential as the mass of the set via a wrist wrap with resistance.
  • Page 6 1 - 6 INSTRUCTIONS ON CD PLAYABILITY Customer complaint "CD related problem" Set remains closed! check playability playability ok ? For flap loaders (= access to CD drive possible) "fast" lens cleaning cleaning method is recommended check playability playability ok ? Play a CD for at least 10 minutes check playability...
  • Page 7 1 - 7 INSTRUCTIONS ON CD PLAYABILITY PLAYABILITY CHECK LIQUID LENS CLEANING Before touching the lens it is advised to clean the surface of the lens by blowing clean air over it. For sets which are compatible with CD-RW discs This to avoid that little particles make scratches on use CD-RW Printed Audio Disc ....7104 099 96611 the lens.

  • Page 8: Service Test Mode

    2 - 1 2 - 1 SERVICE TEST MODE 1. How to enter Test Mode: 1. Plug out the power cord. 2. Hold “FB” key and “STOP” Key. 3. Plug in power cord. 4. Unit will enter test mode. 2. Test mode operation: 1.
  • Page 9 3 - 1 3 - 1 SET BLOCK & WIRING DIAGRAM...
  • Page 10 4 - 1 4 - 1 CIRCUIT DIAGRAM - MAIN BOARD AUDIO & POWER AMP. SECTION (only for /55/77)
  • Page 11 4 - 2 4 - 2 CIRCUIT DIAGRAM - MAIN BOARD AUDIO & POWER AMP. SECTION (only for /85)
  • Page 12 4 - 3 4 - 3 CIRCUIT DIAGRAM - MAIN BOARD MCU & POWER SUPPLY SECTION...
  • Page 13 4 - 4 4 - 4 LAYOUT DIAGRAM - MAIN BOARD TOP VIEW...
  • Page 14 4 - 5 4 - 5 LAYOUT DIAGRAM - MAIN BOARD BOTTOM VIEW...
  • Page 15 4 - 6 4 - 6 LAYOUT DIAGRAM - HEADPHONE BOARD...

  • Page 16: Front Board

    5 - 1 5 - 1 CIRCUIT DIAGRAM - FRONT BOARD...
  • Page 17 5 - 2 5 - 2 LAYOUT DIAGRAM - FRONT BOARD TOP VIEW...
  • Page 18 5 - 3 5 - 3 LAYOUT DIAGRAM - FRONT BOARD BOTTOM VIEW...

  • Page 19: Key Board

    6 - 1 6 - 1 LAYOUT DIAGRAM - TOP KEY BOARD TOP VIEW...
  • Page 20 6 - 2 6 - 2 LAYOUT DIAGRAM - TOP KEY BOARD BOTTOM VIEW...

  • Page 21: Cd Board

    7 - 1 7 - 1 CIRCUIT DIAGARM - CD BOARD...
  • Page 22 7 - 2 7 - 2 LAYOUT DIAGARM - CD BOARD TOP VIEW...
  • Page 23 7 - 3 7 - 3 LAYOUT DIAGARM - CD BOARD BOTTOM VIEW...

  • Page 24: Cassette Board

    8 - 1 8 - 1 CIRCUIT DIAGRAM - CASSETTE BOARD...
  • Page 25 8 - 2 8 - 2 LAYOUT DIAGRAM - CASSETTE BOARD COMPONENT SIDE COPPER SIDE...
  • Page 26 8 - 3 8 - 3 TAPE ADJUSTMENT & CHECK TABLE ADJUST TEST RECORDER MEASURE READ ON CASSETTE MODE with SBC420 frequency MOTOR SPEED PLAY check 3150Hz +/- 2% counter 3150Hz SBC420 WOW & FLUTTER check PLAY W&F-meter < 0.4 % DIN 3150Hz PLAY FWD left hand screw...
  • Page 27 9 - 1 9 - 1 SET MECHANICAL EXPLODED VIEW CDS2 CDS1 DAMP DAMP TRAF VKSW CADS...
  • Page 28 9 - 2 MECHANICAL & ACCESSORIES PARTS LIST 994000001434 CASS MECHANISM W991S-390 994000003268 ANTENNA WIRE 1000MM ! 996510018690 1.5M VDE POWER CORD /55 CADS 996510002331 CASSETTE DOOR SPRING ! 996510016721 1.5M VDE POWER CORD /77 994000003553 CDM DA12T3V ! 996510000876 5FT VDE POWER CORD /85 CDS1 996510001074...
  • Page 29 9 - 3 ELECTRICAL PARTS LIST 996510015966 996510010774 6612 DIODE 1N4001 TAPE FORM D3203 DIODE 1N4148 FDLL4148 996510011332 996510010774 6772 DIODE 1N4148 D3204 DIODE 1N4148 FDLL4148 996510011332 996510010774 6773 DIODE 1N4148 D3205 DIODE 1N4148 FDLL4148 996510011332 6774 DIODE 1N4148 D3206 996510010774 DIODE 1N4148 FDLL4148 996510011332...

  • Page 30: Electrical Parts List

    9 - 4 ELECTRICAL PARTS LIST SW714 994000001444 TACT SWITCH TSA-065001-150 U1101 996510012838 IC TDA8920BTH SOT566-3 U1201 996510012838 IC TDA8920BTH SOT566-3 U1301 996510001055 IC BA4558 SOP8 U1401 996510016573 IC TDA7468D13TR(E) U1402 996510001055 IC BA4558 SOP8 U1601 996500039259 IC PT4800(L) DIP-8 PIN U2101 994000005724 IC LD1117AL-3.3V-D...
  • Page 31 10-1 REVISION LIST 1.0 Manual 3141 785 32810 Initial Service Manual released. 1.1 Manual 3141 785 32811 In this version, on Page 9-2, Mechanical & Accessories Parts List updated. REM 996510019921 REMOTE CONTROL /85 (WAS 996510002352) REM 996510019920 REMOTE CONTROL /55/77 (WAS 996510002352)

This manual is also suitable for:

Mcm755Mcm785Mcm777Mcm76555Mcm76577Mcm76585

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