Philips-MCM-298-Service-Manual(1) 电路图 维修手册.pdf

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1、 MCM298/37/55 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 transmitted, in any form or by any means, electronic, mechanical, photocopying, or otherwise without the prior

2、 permission of Philips. Published by SL 0629 Service Audio Printed in The Netherlands Subject to modification Micro System Version 1.0 CLASS 1 LASER PRODUCT 3141 785 31140 TABLE OF CONTENTS Page Location of PC Boards fr Reparaturen sind Original-Ersatzteile zu verwenden. Sicherheitsbauteile sind dur

3、ch das Symbol ! markiert. I Le norme di sicurezza esigono che lapparecchio venga rimesso nelle condizioni originali e che siano utilizzati i pezzi di ricambio identici a quelli specificati. Componenty di sicurezza sono marcati con ! GB After servicing and before returning set to customer perform a l

4、eakage current measurement test from all exposed metal parts to earth ground to assure no shock hazard exist. The leakage current must not exceed 0.5mA. 1-7 INFORMATION ABOUT LEAD-FREE SOLDERING Philips CE is producing lead-free sets from 1.1.2005 onwards. IDENTIFICATION: Regardless of special logo

5、(not always indicated) one must treat all sets from 1 Jan 2005 onwards, according next rules: Example S/N: Bottom line of typeplate gives a 14-digit S/N. Digit 5&6 is the year, digit 7&8 is the week number, so in this case 2005 wk12 So from 0501 onwards = from 1 Jan 2005 onwards Important note: In f

6、act also products of year 2004 must be treated in this way as long as you avoid mixing solder-alloys (leaded/ lead-free). So best to always use SAC305 and the higher temperatures belong to this. Due to lead-free technology some rules have to be respected by the workshop during a repair: Use only lea

7、d-free solder alloy Philips SAC305 with order code 0622 149 00106. If lead-free solder-paste is required, please contact the manufacturer of your solder-equipment. In general use of solder-paste within workshops should be avoided because paste is not easy to store and to handle. Use only adequate so

8、lder tools applicable for lead-free solder alloy. The solder tool must be able oTo reach at least a solder-temperature of 40 oTo stabilize the adjusted temperature at the solder-tip oTo exchange solder-tips for different applications. Adjust your solder tool so that a temperature around is reached a

9、nd stabilized at the solder joint. Heating-time of the solder-joint should not exceed 4 sec. Avoid temperatures above 400otherwise wear-out of tips will rise drastically and flux-fluid will be destroyed. To avoid wear-out of tips switch off un-used equipment, or reduce heat. Mix of lead-free solder

10、alloy / parts with leaded solder alloy / parts is possible but PHILIPS recommends strongly to avoid mixed solder alloy types (leaded and lead-free). If one cannot avoid or does not know whether product is lead-free, clean carefully the solder-joint from old solder alloy and re-solder with new solder

11、 alloy (SAC305). Use only original spare-parts listed in the Service-Manuals. Not listed standard-material (commodities) has to be purchased at external companies. Special information for BGA-ICs: - always use the 12nc-recognizable soldering temperature profile of the specific BGA (for de-soldering

12、always use the lead-free temperature profile, in case of doubt) - lead free BGA-ICs will be delivered in so-called dry-packaging (sealed pack including a silica gel pack) to protect the IC against moisture. After opening, dependent of MSL-level seen on indicator-label in the bag, the BGA-IC possibly

13、 still has to be baked dry. (MSL=Moisture Sensitivity Level). This will be communicated via AYS-website. Do not re-use BGAs at all. For sets produced before 1.1.2005 (except products of 2004), containing leaded solder-alloy and components, all needed spare-parts will be available till the end of the

14、 service-period. For repair of such sets nothing changes. On our website www.atyourservice.ce.P you find more information to: BGA-de-/soldering (+ baking instructions) Heating-profiles of BGAs and other ICs used in Philips-sets You will find this and more technical information within the magazine, c

15、hapter workshop news. For additional questions please contact your local repair-helpdesk. SERVICE INSTRUCTION 1. Unplug the AC Power cord and connect a wire between the two pins of the AC Power plug. 2. Set the AC Power switch to the on position (keep the AC Power cord unplugged!). 3. Measure the re

16、sistance value between the pins of the AC Power plug and the metal shielding of the tuner or the aerial connection on the set. The reading should be larger than 4.5 Mohm (For U.S. it should be between 4.2 Mohm and 12 Mohm). 4. Switch off the set, and remove the wire between the two pins of the AC Po

17、wer plug. Safety regulations require that after a repair, the set must be returned in its original condition. Pay in particular attention to the following points: Route the wire trees correctly and fix them with the mounted cable clamps. Check the insulation of the AC Power lead for external damage.

18、 Check the strain relief of the AC Power cord for proper function. Check the electrical DC resistance between the AC Power Plug and the secondary side (only for sets which have a AC Power isolated power supply): Check the cabinet for defects, to avoid touching of any inner parts by the customer. 1-8

19、 ? ? The type plate is located at the rear of the system. A? ? ? ? Warning! For optimal performance, use only the original power cable. Never make or change any connections with the power switched on. To avoid overheating of the system, a safety circuit has been built in. Therefore, your system may

20、switch to Standby mode automatically under extreme conditions. If this happens, let the system cool down before reusing it ? B? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 1 2 ? ? ? C? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?Appendix ?Wall Mounting Instructions? ? 1?4 ? ? ? 2? ? 3? ? 4? ? ? ? ? ?4? ? ? ? ?

21、 ? ? ? ? ? ? ? ? ? ? ? ? ? PREPARATIONS 1-9 ? ? ? 1 3 2 1? 2? ? 3? ? ? 1? ? 2? ? ? ? ? ? ? ? ? ? ? 5 7 ! 4 0 9 99 8 2 7 # 7 9 1 3 6 7 PREPARATIONS & CONTROLS 1-10 1 2 3 4 # 9 0 % & 5 $ 8 ! ) ( * 7 6 6 7 ? ? (illustrations on page 3) 1?B ? ? 2? ? 3? ? 4? ? 5? ? 6? -?+ ? 7? 8? ?-?+ ? ? ? ? ? ? ? ? ? ?

22、 ? ? 9? ? ? ? ? -?+ ? ? ? ? ? ? ? ? ? ? 9? ? 0? ? ? ? ? !? ? ? ? ? #n ? ? ? 1?B ? ? 2? ? ? ? 3? ? 4? ? 5? ? 6 ? ? ? ? ? ? ? ? ? ? ? ? 7 ? ? ? ? ? 8? ? 9? ? ? ? ? ? ? ? ? ? CONTROLS 1-11 CONTROLS AND TROUBLESHOUTING ? Notes for remote control: First select the source you wish to control by pressing o

23、ne of the source select keys on the remote control (for example CD,TUNER). Then select the desired function (for example,). 0 ? !9 ? ? ? #? ? ? $? ? %? ? ? ? &? ? ? ? ? *? ? ? (? ? )? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? WARNING Under no circumstances should you try to repair the system yourself, as th

24、is will invalidate the warranty. Do not open the system as there is a risk of electric shock. If a fault occurs, first check the points listed below before taking the system for repair. If you are unable to remedy a problem by following these hints, consult your dealer or Philips for help. ? ? ? ? ?

25、 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 2-12-1 DISMANTLING INSTRUCTIONS 1) Loosen 4 screws A to remove the Front Panel Assy by sliding it out towards the underside before lifting up as shown in Figure 1. 2) Loosen 7 screws B and 4 screws C to remove the Re