Philips-MCB-700-Service-Manual(1) 电路图 维修手册.pdf

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1、Version 1.0 MCB700/05 3141 785 31120 DAB Micro System Published by SL 0632 Service Audio Subject to modification Copyright 2005 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

2、, in any form or by any means, electronic, mechanical, photocopying, or otherwise without the prior permission of Philips. Handling chip components . 1-1 Service tools . 1-1 Leadfree and safety information . 1-2 Technical specification . 2-1 Service measurement setup . 2-2 Preparations and Controls

3、.3-1.3-3 Disassembly Instruction .4-1.4-2 Software Checking . 5-1 Block diagram. 6-1 Wiring diagram . 6-2 VFD / Key Board Assembly circuit diagram . 7-1 layout diagram . 7-2 CD Block circuit diagram . 8-1 layout diagram .8-2 to 8-3 DAB Tuner board circuit diagram. . 9-1 layout diagram . 9-2 CD / MPE

4、G board circuit diagram .10-1.10-4 AMP Block circuit diagram. .11-1 layout diagram .11-2 to 11-3 Exploded view diagram . 12-1 Mechanical partslist .12-2.12-3 Electrical partslist .13-1.13-2 TABLE OF CONTENTS CLASS 1 LASER PRODUCT RadioFans.CN 收音机爱 好者资料库 1 - 1 HANDLING CHIP COMPONENTS RadioFans.CN 收音

5、机爱 好者资料库 1 - 2 INFORMATION ABOUT LEAD-FREE SOLDERING Philips CE is producing lead-free sets from 1.1.2005 onwards. IDENTIFICATION: Regardless of special logo (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

6、-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 fact 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 us

7、e 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 lead-free solder alloy Philips SAC305 with order code 0622 149 00106. If lead-free solder-paste is required, please contact the manufacturer of y

8、our 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 solder 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

9、 adjusted temperature at the solder-tip oTo exchange solder-tips for different applications. Adjust your solder tool so that a temperature around is reached and stabilized at the solder joint. Heating-time of the solder-joint should not exceed 4 sec. Avoid temperatures above 400otherwise wear-out of

10、 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 alloy / parts with leaded solder alloy / parts is possible but PHILIPS recommends strongly to avoid mixed solder alloy types (leaded and lead-

11、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 alloy (SAC305). Use only original spare-parts listed in the Service-Manuals. Not listed standard-material (commodities) has to be purchased a

12、t external companies. Special information for BGA-ICs: - always use the 12nc-recognizable soldering temperature profile of the specific BGA (for de-soldering 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

13、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 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 p

14、roduced 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 service-period. For repair of such sets nothing changes. On our website www.atyourservice.ce.P you find more information to: BGA-de-/solderin

15、g (+ baking instructions) Heating-profiles of BGAs and other ICs used in Philips-sets You will find this and more technical information within the magazine, chapter workshop news. For additional questions please contact your local repair-helpdesk. SERVICE INSTRUCTION 1. Unplug the AC Power cord and

16、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 resistance 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 sho

17、uld 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 Power plug. Safety regulations require that after a repair, the set must be returned in its original condition. Pay in particular attention to t

18、he 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. Check the strain relief of the AC Power cord for proper function. Check the electrical DC resistance between the AC Power Plug and the second

19、ary 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. RadioFans.CN 收音机爱 好者资料库 2 - 1 GENERAL Mains voltage V032:50/ Mains frequencyzH05:50/ Batteryfor remote : 3V (R03, AAA x 2) Power consumptionMax.

20、: 35 W (max.) Standby : 150cd/m2 Contrastdark room : 150 :1 LOUDSPEAKERS 2-way bass reflex system Dimension (W x H x D): 145 x 230 x 210 mm hcaegK4.2:thg i eW ECO Standby : 1 W Channel Separation : 45 dB Overall Distortion : 1% Max Data Bit Rate : 320Kbit/S Acquisition Time after Synchronization Los

21、s: 2 Sec DAB Modes : Supports Modes I, II, III Frequency Response : 20Hz - 20 kHz (+0.5/-2.0dB) 7 automatically by CD 10) MP3 Bit Rates : 8K - 320Kps Sampling Rates : 8/11.025/16/22.05/32/44.1/48KHz MP3 Multisession : Directory resting Max 8 level, Max directory 32 SPECIFICATION 2 - 2 SERVICE MEASUR

22、EMENT 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 a bandpass filter to eliminate hum (50Hz, 100Hz) and disturbance from the pilottone (19kHz, 38kHz). Ri=50? Bandpass 250Hz-15kHz e.g

23、. 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 atmospheric interference all AM-measurements have to be carried out in a Faraday?s cage. Use a bandpass filter (or at least a high pass filt

24、er 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 Technology ST1700B DUT CDRECORDER Use Audio Signal Disc SBC429 4822 397 30184 (replaces test disc 3) Use Universal Test Cassette F

25、e 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 - 1 PREPARATIONS ? C? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? D? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 1? 2? ? ? 3? ? ? ? ? 1? 2? 3? ? ? 1

26、2 3 CR2025 CAUTION! Batteries contain chemical substances, so they should be disposed of properly. ? ? 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. N

27、ever 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 switch to Standby mode automatically under extreme conditions. If this happens, let the system cool down before reusing it ? B? ? ? ? ? ?

28、 C? 1? ? ? ? 2? ? ? ? ? ? ? ?DAB/FM AERIAL? ? ? ? ? ? ? ? 3 - 2 CONTROLS ? ? ? 1?B ? ? 2? ? 3? ? 4? ? 5? -?+ ?+?-? ? ? ? 6? 7S?T ? ? ? ? ? ? ? 8?9? + ? ? ? 9? - ? ? ? ? ? ? 0? +?- ? ? ? ? ! 5?6 ? ? ? ? ? ? ? ? ? ? ? ? ? #? ? ? $? ? ? ? %? ? ? ? ? ? ? ? &? ? ? ? ? *? ? (? ? )? ? ? ? ? ? 6 3 5 % $ 7 #

29、 9 8 2 1 4 1 # * ! ( 0 $ % ! 8 5 ) & 3 - 3 CONTROLS AND TROUBLESHOOTING ? WARNING Under no circumstances should you try to repair the system yourself, as this 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. ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?