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Philips MCM761/12/61 Service Manual
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Philips MCM761/12/61 Service Manual

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Micro System
©
Copyright 2011 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 1108 Service Audio Printed in The Netherlands
Version 1.4
TABLE OF CONTENTS
Location of PC Boards & Versions Variation ........................ 1-2
Speci cations ....................................................................... 1-3
Measurement Setup ............................................................. 1-4
Service Aids, Safety Instruction, etc ...........................1-5 to 1-7
Connections & Functional Overview......................... 1-8 to 1-11
Troubleshooting ......................................................1-12 to 1-13
Disassembly Instructions & Service positions ......................... 2
Service Test Program .............................................................. 3
Set Block Diagram ................................................................... 4
Set Wiring Diagram ................................................................. 5
Display Board .......................................................................... 6
CD Board ................................................................................. 7
Power Board ............................................................................ 8
Cassette Board........................................................................ 9
Main and Top Key Boards ..................................................... 10
Set Mechanical Exploded View & Parts List .......................... 11
Revision List .......................................................................... 12
Page
Subject to modification
MCM761
/12/61
CLASS 1
LASER PRODUCT
3141 785 34044

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Summary of Contents for Philips MCM761/12/61

  • Page 1 LASER PRODUCT © Copyright 2011 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 LACATION OF PCBS VERSION VARIATIONS: Type /Versions: MCM761 Service policy Board in used: DISPLAY BOARD TOP KEY BOARD TUNER BOARD MAIN BOARD POWER BOARD CASS BOARD CD BOARD Type /Versions: MCM761 Features Feature diffrence VOLTAGE SELECTOR ECO STANDBY - DARK * TIPS : C -- Component Lever Repair.

  • Page 3: Specifications

    SPECIFICATIONS GENERAL: Input sensitivity Mains voltage : 110-127V/220-240V Switchable for /98 Aux in (at 1kHz) : 500mV at 600 ohm 117V ± 10% for /37 CD (Audio Disc1) : -6dB track (Trk 35) 220V ± 10% for /61 USB : -6dB track 230 ±...

  • Page 4: Measurement Setup

    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 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. Keep components and tools also at this potential.
  • 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 DISMANTLING INSTRUCTIONS Dismantling of the Cover Cassette and Universal Loader Detaching the Universal Loader from the Bracket Module Mounting 1) Remove the Cover Cassette (pos 1+pos 2) in the direction as 1) Slide out the Loader Tray fully and remove 4 screws B (see shown in Figure 1.
  • Page 9 DISMANTLING INSTRUCTIONS Dismantling of the Front Panel assembly Dismantling of the Front Panel assembly 1) The Knob Volume (pos 10) can be remove by pulling it 5) Loosen 4 screws G (see Figure 9) to remove the Bracket out in the direction as shown in Figure 7 Main.
  • Page 10 DISMANTLING INSTRUCTIONS Service position B Repair Hints & Service Positions 1) During repair it is possible to disconnect the Tuner Board Note: The flex cables are very fragile, care should be taken and/or CD Module completely unless the fault is sus- not to damage them during repair.

  • Page 11: Service Test Program

    SERVICE TEST PROGRAM To start service test program hold PREVIEW & PLAY buttons depressed while plugging in the mains cord and in standby status. S refers to Service Mode Display shows the ROM version V refers to Version "S-Vyy" yy refers to Software version number of the uProcessor (Main menu) (counting up from 01 to 99) TUNER...

  • Page 12: Set Block Diagram

    SET BLOCK DIAGRAM...

  • Page 13: Set Wiring Diagram

    SET WIRING DIAGRAM...

  • Page 14: Display Board

    DISPLAY BOARD TABLE OF CONTENTS FTD Display Pin Connection ........... 6-2 Display PCB - Layout Top View ........6-3 Display PCB - Layout Bottom View ......... 6-4 Circuit Diagram ............... 6-5...
  • Page 15 FTD DISPLAY PIN CONNECTION...
  • Page 16 PCB LAYOUT - DISPLAY BOARD (TOP VIEW)
  • Page 17 PCB LAYOUT - DISPLAY BOARD (BOTTOM VIEW)
  • Page 18 CIRCUIT DIAGRAM - DISPLAY BOARD...

  • Page 19: Cd Board

    CD BOARD The board is not intented to be repaired on component level. Circuit Diagram and Printed Circuit Board drawings are published for orientation only. In case of defects please replace the entire board. The board can be ordered with codenumber “9965 100 23096”. TABLE OF CONTENTS CD PCB - Layout Top View ..........
  • Page 20 PCB LAYOUT - CD BOARD (TOP VIEW)
  • Page 21 PCB LAYOUT - CD BOARD (BOTTOM VIEW)
  • Page 22 CIRCUIT DIAGRAM - CD BOARD (PART1)
  • Page 23 CIRCUIT DIAGRAM - CD BOARD (PART2)
  • Page 24 CIRCUIT DIAGRAM - CD BOARD (PART3)

  • Page 25: Power Board

    CIRCUIT DIAGRAM - POWER BOARD (PART1) C403 JP405 472M/1KV T401ER40_761 472/1KV C414 L402 10uH C412 2200uF/35V +25V +25V JP404 HEATSINK R403 JP410 JP411 R419 +25V D401 5R/4A TVR403 HS401 47K/2W UF803 4K7/1W KBL10/4.0A RT402 D407 C401 PGND 330uF/200V VD401 R407 D402 R417 33/2W R421 2K2...
  • Page 26 CIRCUIT DIAGRAM - POWER BOARD (PART2) R443 C439 FR104 FB405 T402 D418 C424 FB600 R438 R439 100uF/16V FB404 C425 FB600 V406 JP412 KTA1275 102/1KV C438 -30V 47uF/50V FB403 R440 4.7K C426 FB600 R441 ON/OFF FR107 -30V D419 VD404 R448 C437 102/1KV 6.8V JP420...

  • Page 27: Cassette Board

    CASSETTE BOARD The board is not intented to be repaired on component level. Circuit Diagram and Printed Circuit Board drawings are published for orientation only. In case of defects please replace the entire board. The board can be ordered with codenumber “9965 100 23098”. TABLE OF CONTENTS Cassette PCB - Layout Top View ........
  • Page 28 PCB LAYOUT - CASSETTE BOARD (TOP VIEW) PCB LAYOUT - CASSETTE BOARD (BOTTOM VIEW)
  • Page 29 CIRCUIT DIAGRAM - CASSETTE BOARD...

  • Page 30: Main And Top Key Boards

    10-1 10-1 MAIN & TOP KEY BOARD TABLE OF CONTENTS Main & Top Key PCBs - Layout Top View ...... 10-2 Main & Top Key PCBs - Layout Bottom View ....10-3 Main & Top Key PCBs - Circuit Diagram ...... 10-4...
  • Page 31 10-2 10-2 PCB LAYOUT - MAIN & TOP KEY BOARD (TOP VIEW)
  • Page 32 10-3 10-3 PCB LAYOUT - MAIN & TOP KEY BOARD (BOTTOM VIEW)
  • Page 33 10-4 10-4 CIRCUIT DIAGRAM - MAIN & TOP KEY BOARD...
  • Page 34 11-1 11-1 SET MECHANICAL EXPLODED VIEW TUNERM 16-19 CASS...
  • Page 35 CON603 996510040679 FFC CONNECTOR 30PIN P1.00MM WHITE 994000005642 SPRING-CASSETTE DOOR...
  • Page 36 11 - 3 11 - 3 MECHANICAL & ACCESSORIES PARTS LIST ELECTRICAL PARTS LIST Loc. 12NC 12NC Description Description Loc. 12NC 12NC Description Description POWER BOARD ASSEMBLY (ONLY FOR REFERENCE) POWER BOARD ASSEMBLY (ONLY FOR REFERENCE) C401 C401 996510023069 996510023069 CAP ELECT 330UF 200V +/-20% CAP ELECT 330UF 200V +/ 20% U405...

  • Page 37: Revision List

    12-1 REVISION LIST 1.0 Manual 3141 785 34040 Initial Service Manual released. 1.1 Manual 3141 785 34041 In this version, Some diagrams updated 1.2 Manual 3141 785 34042 In this version, Page 11-2 Partslist updated. Add: 996510023105 MAIN PWB ASSEMBLY /12 1.3 Manual 3141 785 34043 In this version, Page 11-2,3 Partslist updated.

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