Philips MCM355 User manual

MCM355/12
©Copyright 2009 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 0915 Service Audio Printed in The Netherlands Subject to modification
Micro System
Version 1.0
CLASS 1
LASER PRODUCT
©3141 785 33930
TABLE OF CONTENTS
Page
Location of PCBs..................................................................1-2
Specifications .......................................................................1-3
Measurement Setup.............................................................1-4
Service Aids, Safety Instruction, etc.....................................1-5
CD Playability Check..................................................1-6 to 1-7
Software Version Checking .....................................................2
Set Wiring & Block Diagram....................................................3
Audio AMP Board....................................................................4
MCU & USB & Headphone Boards.........................................5
Touch Panel & VFD & Power Key Boards...............................6
Set Mechanical Exploded View & Parts List............................7
Revision List............................................................................8

1-2
VERSION VARIATIONS
Type /Versions:
Board in used:
MCM205
Service policy
MAIN BOARD
MCU BOARD
USB JACK BOARD
* TIPS : C -- Component Lever Repair.
M -- Module Lever Repair
-- Used
C
/12 /05 /55 89/
16/85/
DISPLAY & KEY BOARD C
C
TUNER BOARD M
x
HEADPHONE BOARD C
/37
C/M
DISPLAY & KEY BOARD
HEADPHONE BOARD
MCU BOARD
TUNER BOARD
USB BOARD
MAIN BOARD
PCBS LOCATION

Specifications
Amplifier
Rated Output Power4X50W RMS
Frequency Response 63 - 14000 Hz, ±3dB
Signal to Noise Ratio >62dB
Disc
Laser Type Semiconductor
Disc Diameter 12cm/8cm
Support Disc CD-DA, CD-R,
CD-RW, MP3-CD,
WMA-CD
Audio DAC 24Bits / 44.1kHz
Total Harmonic
Distortion <1%
Frequency Response63Hz - 14kHz
S/N Ratio >65dBA
Tuner (FM)
Tuning Range 87.5 - 108 MHz
Tuning grid 50 KHz
Sensitivity
- Mono, 26dB S/N Ratio <22 dBu
Search Selectivity <28 dBu
Total Harmonic Distortion<3%
Signal to Noise Ratio >45 dB
Speakers
Speaker Impedance 6ohm
General information
AC power 220 - 230V,
50Hz
Operation Power
Consumption 42W
Standby Power
Consumption <20W
Eco Standby Power
Consumption <0.8W
Dimensions
- Main Unit (W x H x D)
- Speaker Box (W x H x D)
173 x 257 x
240mm
173 x 257 x
240mm
Weight
- With Packing
- Main Unit
- Speaker Box
10.8 kg
2.3 kg
2 x 2.8 kg
USB playability information
Compatible USB devices:
USB flash memory (USB 2.0 or•USB1.1)
USBflash players (USB 2.0 or•USB1.1)
memory cards (requires an additional•card reader to work with this
MCM355)
Supported formats:
USB or memory file format FAT12,•FAT16, FAT32 (sector size: 512 bytes)
MP3 bit rate (data rate): 32-320 Kbps•and variable bit rate
WMA v9 or earlier•Directory nesting up to a maximum•of 8 levels
Number of albums/ folders:•maximum 99
Number of tracks/titles: maximum•999
ID3 tag v2.0 or later•File name in Unicode UTF8•(maximum length: 128 bytes)
Unsupported formats:
Empty albums: an empty album is an•album that does not contain MP3/
WMA files, and is not be shown in
the display.
Unsupportedfile formats are•skipped. For example, Word
documents (.doc) or MP3?fileswith
extension .dlf are ignored and not
played.
AAC, WAV, PCM audio?files•DRM protected WMA?files (.wav,•.m4a, .m4p, .mp4, .aac)
WMA files in Lossless format•
Supported MP3 disc formats
ISO9660, Joliet•Maximum title number: 512 (depending•on file name length)
Maximum album number: 255•Supported sampling frequencies: 32 kHz,•44.1kHz, 48 kHz
Supported Bit-rates: 32~256 (kbps),•variable bit rates
1-3

1-4
LEVEL METER
e.g. Sennheiser UPM550
with FF-filter
S/N and distortion meter
e.g. Sound Technology ST1700B
L
R
DUT
CD
Use Audio Signal Disc (replaces test disc 3)
SBC429 4822 397 30184
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 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 filter with 250Hz) to eliminate hum (50Hz, 100Hz).
RF Generator
e.g. PM5326
Ri=50
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
Use a bandpass filter to eliminate hum (50Hz, 100Hz) and disturbance from the pilottone (19kHz, 38kHz).
Ri=50
Tuner FM
MEASUREMENT SETUP

1-5
SERVICE AIDS
GB WARNING
All ICs and many other semi-conductors are
susceptible to electrostatic discharges (ESD).
Careless handlingduringrepair can reduce life
drastically.
When repairing,make sure thatyouare
connected with the same potentialas the mass
ofthe set viaawrist wrapwith resistance.
Keep components and tools also at this
potential.
ESD
CLASS 1
LASER PRODUCT
GB
Safety regulations require that the set be restored to its original
condition and that parts which are identical with those specified,
be used
Safety components are marked by the symbol !.
Lead free

Set remains closed!
N
Y
Play a CD
for at least 10 minutes
Y
playability
ok ?
N
playability
ok ?
add Info for customer
"SET OK"
check playability
N
Y
playability
ok ?
check playability
check playability
return set
Customer complaint
"CD related problem"
"fast" lens cleaning
For flap loaders (= access to CD drive possible)
cleaning method is recommended
INSTRUCTIONS ON CD PLAYABILITY
1 - 6
Exchange CDM
- For description - see following pages

PLAYABILITY CHECK
For sets which are compatible with CD-RW discs
use CD-RW Printed Audio Disc ....................7104 099 96611
TR 3 (Fingerprint)
TR 8 (600µ Black dot) maximum at 01:00
• playback of these two tracks without audible disturbance
playing time for: Fingerprint 10seconds
Black dot from 00:50 to 01:10
• jump forward/backward (search) within a reasonable time
For all other sets
use CD-DA SBC 444A..................................4822 397 30245
TR 14 (600µ Black dot) maximum at 01:15
TR 19 (Fingerprint)
TR 10 (1000µ wedge)
• playback of all these tracks without audible disturbance
playing time for: 1000µ wedge 10seconds
Fingerprint 10seconds
Black dot from 01:05 to 01:25
• jump forward/backward (search) within a reasonable time
CUSTOMER INFORMATION
It is proposed to add an addendum sheet to the set which
informs the customer that the set has been checked
carefully - but no fault was found.
The problem was obviously caused by a scratched, dirty or
copy-protected CD. In case problems remain, the customer
is requested to contact the workshop directly.
The lens cleaning (method ) should be mentioned in the
addendum sheet.
The final wording in national language as well as the printing
is under responsibility of the Regional Service Organizations.
LIQUID LENS CLEANING
Because the material of the lens is synthetic and coated
with a special anti-reflectivity layer, cleaning must be done
with a non-aggressive cleaning fluid. It is advised to use
“Cleaning Solvent
The actuator is a very precise mechanical component and
may not be damaged in order to guarantee its full function.
Clean the lens gently (don’t press too hard) with a soft and
clean cotton bud moistened with the special lens cleaner.
The direction of cleaning must be in the way as indicated in
the picture below.
Before touching the lens it is advised to clean the
surface of the lens by blowing clean air over it.
This to avoid that little particles make scratches on
the lens.
INSTRUCTIONS ON CD PLAYABILITY
1 - 7

How to read software version,
1. Standby mode, press and hold PLAY button for 5 seconds,
LCD Display shows existing MCU software version, eg. “V300313”.
SERVICE TEST PROGRAM
2-1 2-1
2. No USB status, press and hold POWER and SOURCE buttons for 3 seconds,
LCD Display shows existing USB software version, eg. “V0022”.

3-1 3-1
SET BLOCK DIAGRAM

3-2 3-2
SET WIRING DIAGRAM

4-1 4-1
PCB LAYOUT - AUDIO AMP BOARD

4-2 4-2
CIRCUIT DIAGRAM - AUDIO AMP BOARD (PART1)

4-3 4-3
CIRCUIT DIAGRAM - AUDIO AMP BOARD (PART2)

5-1 5-1
PCB LAYOUT - MCU BOARD

5-2 5-2
CIRCUIT DIAGRAM - MCU BOARD (PART1)

5-3 5-3
CIRCUIT DIAGRAM - MCU BOARD (PART2)

5-4 5-4
PCB LAYOUT - USB BOARD (TOP VIEW)
PCB LAYOUT - USB BOARD (BOTTOM VIEW)

5-5 5-5
CIRCUIT DIAGRAM - USB BOARD

5-6 5-6
PCB LAYOUT - HEADPHONE BOARD (TOP VIEW) PCB LAYOUT - HEADPHONE BOARD (BOTTOM VIEW)
PCB LAYOUT - AUX BOARD (TOP VIEW) PCB LAYOUT - AUX BOARD (BOTTOM VIEW)

5-7 5-7
CIRCUIT DIAGRAM - HEADPHONE & AUX JACK BOARD