Philips-MCM-720-Service-Manual(1) 电路图 维修手册.pdf

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1、Version 1.1 MCM720 3141 785 31001 MP3 Micro System all versions Published by LX 0718 Service Audio Subject to modification Copyright 2006 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 t

2、ransmitted, in any form or by any means, electronic, mechanical, photocopying, or otherwise without the prior permission of Philips. Repair policy of PCBS . 1-1 Technical specification . 2-1 Service tools . 2-1 Service measurement setup . 2-2 Connections and controls.3-1.3-3 Dismantling instructions

3、 .4-1.4-3 Block diagram. 5-1 Wiring diagram . 6-1 Main Board circuit diagram .7-1.7-2 layout diagram .7-3.7-4 C Music Board circuit diagram .8-1.8-2 layout diagram .8-3.8-4 Panel Board circuit diagram. . 9-1 layout diagram . 9-2 Cassette Board circuit diagram . 10-1 layout diagram . 10-2 Tuner Board

4、 circuit diagram. .11-1 layout diagram .11-2 Rectifier Board circuit diagram. . 12-1 layout diagram . 12-2 Exploded view diagram . 13-1 Mechanical partslist . 13-2 Electrical partslist .14-1.14-7 TABLE OF CONTENTS Revision list.15-1 RadioFans.CN 收音机爱 好者资料库 1 - 1 REPAIR POLICY OF PCBS VERSION VARIATI

5、ONS: Type /Versions: Features Board in used: MCM720 Service policy * TIPS : C - Component Lever Repair. M - Module Lever Repair - Used C Feature diffrence RDS VOLTAGE SELECTOR ECO STANDBY - DARK Type /Versions: C C C C C /05/12 MAIN BOARD CASSETTE BOARD PANEL BOARD CMUSIC BOARD MCM720 /05/12 TUNER B

6、OARD C C C C C C RECTIFIER BOARD RadioFans.CN 收音机爱 好者资料库 2 - 1 TECHNICAL SPECIFICATIONS RadioFans.CN 收音机爱 好者资料库 2 - 2 SERVICE MEASUREMENT Bandpass 250Hz-15kHz e.g. 7122 707 48001 LF Voltmeter e.g. PM2534 DUT RF Generator e.g. PM5326 S/N and distortion meter e.g. Sound Technology ST1700B Tuner FW Use

7、 a bandpass filter to eliminate hum (50Hz, 100Hz) and disturbance from the pilottone (19kHz, 38kHz). Ri=50 Bandpass 250Hz-15kHz e.g. 7122 707 48001 LF Voltmeter e.g. PM2534 DUT S/N and distortion meter e.g. Sound Technology ST1700B Frame aerial e.g. 7122 707 89001 Tuner AM (MW,LW) To avoid atmospher

8、ic interference all AM-measurements have to be carried out in a Faradays cage. Use a bandpass filter (or at least a high pass filter with 250kHz) to eliminate hum (50Hz, 100Hz). RF Generator e.g. PM5326 Ri=50 L R LEVEL METER e.g. Sennheiser UPM550 with FF-filter S/N and distortion meter e.g. Sound T

9、echnology ST1700B DUT CDRECORDER Use Audio Signal Disc SBC429 4822 397 30184 (replaces test disc 3) Use Universal Test Cassette Fe SBC420 4822 397 30071 L R LEVEL METER e.g. Sennheiser UPM550 with FF-filter S/N and distortion meter e.g. Sound Technology ST1700B DUT LF Generator e.g. PM5110 Ri=50 3 -

10、 1 CONNECTION AND CONTROLS ?(illustrations on page 3) ? ? 1?y ? ? 2? ? 3? ? ? ? ? ? 4? ? ? ? ? 5? ? ? ? ? ? 6? S?T ?5?6? ? ? ? ? ? ? ? ? ? 7?4?3 ? ? ? ? ?3? ? ? 8?9 ? ? ? ? 9? ? ? ? 0? !? ? ? ? ? #? ? ? $? ? ? ? ? %? ? ? ? ? &? ? *? ? (n ? ? ? )? ? ? ? ? ? ? ? ? ? ? ? B ? Notes for remote control: F

11、irst select the source you wish to control by pressing one of the source select keys on the remote control (for example CD, TUNER). Then select the desired function (for example ,). VOLUME INCREDIBLE SURROUND PROGRAM TUNINGALBUM/PRESET SOURCE TIMER SET DBBDSC RDS CLOCK SETBAND STANDBY-ON ECO POWER R

12、ECORDDISPLAY WMA -MP3-CD/CD -R/CD-RW COMPATIBLE M C M 7 2 0 M I C R O S Y S T E M iR OPEN/ CLOSE USB DIRECT 5 9 8 $ ! 0 3 1 2 % 4 # 7 ) 6 & ( OPEN CLOSE * % $ 8 6 # 7 9 3 - 2 CONNECTION AND CONTROLS ? ? ? ? ? C? ? ? ? ?+? ?-? 1 2 ? ? ? ? ? ? ? ? ?+?-? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 1? ? 2?

13、? ? 1? ? 2? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? The type plate is located at the rear of the system. For users in the U.K.: please follow the instructions on page 2. A? ? ? ? WARNING! For optimal performance, use only the original power cable. Never make or change connections with the power switched on. T

14、o avoid overheating of the system, a safety circuit has been built in. Therefore, your system may switch to Standby mode automatically under extreme conditions. If this happens, let the system cool down before reusing it ?. B? ? ? ? ? AM ANTENNA ? ? MW Speaker Speaker D 3 - 3 CONNECTION AND CONTROLS

15、 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?A?B? ? ?C? ? Caution: Do not rotate the heads during cleaning. ? ? ? ? AA B C ? ? ? ? ?NO DISC ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?CHK TAPE ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?DEVICE NOT SUPPORTED? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?

16、? ? ?3 ? ? ? ? ? ? ? ? ? ? ? ? 4-1 4 4-1 DISMANTLING INSTRUCTIONS Dismantling of the Cover Cassette and Universal Loader 1) Push 1 catch each on the left & right side then remove the Cover Cassette in the direction as shown in Figure 1 and Figure 1A. 2) Loosen 8 screws to remove the Cover Top by sli

17、ding it out towards the rear before lifting up. - 6 screws on the rear - 1 screw each on the left & right side 3) Loosen 2 screws each to remove the Panel Left and Panel Right. The Panels are removed by sliding it towards the rear and outwards. - 1 screw on the rear - 1 screw on the side - see Servi

18、ce position A 6) Loosen 2 screws A (see Figure 2) to remove the Bracket Module Mounting and CD Module. - 1 screw each on the left & right side Detaching the Front Panel assembly from the Bottom/Rear assembly Figure 1 Figure 1A Figure 2 Lift up and out Push catches on two sides A Figure 3 1) Remove 2 screws B (see Figure 3) from the bottom of the Cabinet Front. Detaching the Front Panel assembly from the Bottom/Rear assembly 2) Release the fixation of the Combi Board (pos1102-1003) to Bracket Combi (pos 155) by releasing the 2 catches C1 (see Figure 7) and pulling the Combi Board ou