Philips MCM-205 Service Manual

Micro System

MCM205/12

TABLE OF CONTENTS

Page

Location of PCBs ..................................................................1-2

Speciﬁ cations .......................................................................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

Main & Tuner & Headphone Boards ........................................4

MCU & USB Board .................................................................. 5

Display & Key Board................................................................6

Set Mechanical Exploded View & Parts List ............................7

Revision List ............................................................................8

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 0914 Service Audio Printed in The Netherlands Subject to modification

Version 1.2

CLASS 1

LASER PRODUCT

PCBS LOCATION

1-2

DISPLAY & KEY BOARD

TUNER BOARD

MAIN BOARD

MCU BOARD

USB BOARD

VERSION VARIATIONS

Board in used:

MAIN BOARD MCU BOARD USB JACK BOARD DISPLAY & KEY BOARD

TUNER BOARD HEADPHONE BOARD

* TIPS : C -- Component Lever Repair.

M -- Module Lever Repair

-- Used

HEADPHONE BOARD

Type /Versions:

Service policy

/12 /05

C/M

C C

M C

/37

MCM205

/55

16/85/

89/

Speciﬁcations

1-3

Amplier

Rated Output Power 2X5W RMS Frequency Response 60 - 16kHz, ±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 Frequency Response 60Hz -16kHz S/N Ratio >62dBA

<1%

Tuner

Tuning Range FM: 87.5 - 108MHz;

MW: 531 - 1602kHz

Tuning grid 50 kHz (FM); 9 kHz

(MW)

Total Harmonic Distortion

Signal to Noise Ratio

<3%

>50 dB

Speakers

Speaker Impedance 4ohm

General information-Specs

Switching mode power supply

Operation Power Consumption

Standby Power Consumption

Eco Standby Power Consumption

Dimensions

- Main Unit (W x H x D)

- Speaker Box (W x H x D)

Weight

- With Packing

- Main Unit

- Speaker Box

Model: GFP181T1512-1 or GFP181DA-1512-1, Input: AC100240V~, 50/60Hz,

0.35A Output: DC15V, 1.2A

26 W

<4 W

<1 W

152 x232 x 222mm

146 x 232 x 140mm

5.20 kg

1.64 kg

2.20 kg

Supported MP3 disc formats

ISO9660, Joliet•

Maximum title number: 512 (depending • on le name length)

Maximum album number: 255•

Supported sampling frequencies: 32 kHz, •

44.1kHz, 48 kHz

Supported Bit-rates: 32~256 (kbps), • variable bit rates

MEASUREMENT SETUP

Tuner FM

1-4

Bandpass

LF Voltmeter

e.g. PM2534

RF Generator

e.g. PM5326

DUT

250Hz-15kHz

e.g. 7122 707 48001

Ri=50

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)

RF Generator

e.g. PM5326

Ri=50

DUT

Frame aerial

e.g. 7122 707 89001

Bandpass

250Hz-15kHz

e.g. 7122 707 48001

LF Voltmeter

e.g. PM2534

S/N and distortion meter

e.g. Sound Technology ST1700B

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).

Use Audio Signal Disc

DUT

SBC429 4822 397 30184

S/N and distortion meter

e.g. Sound Technology ST1700B

LEVEL METER

e.g. Sennheiser UPM550

with FF-filter

(replaces test disc 3)

SERVICE AIDS

1-5

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 thatyouare connected with the same potential as the mass of the set viaawrist wrap with resistance. Keep components and tools also at this potential.

WARNING

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

ESD

CLASS 1

LASER PRODUCT

Lead free

INSTRUCTIONS ON CD PLAYABILITY

Customer complaint

"CD related problem"

Set remains closed!

check playability

1 - 6

playability

ok ?

Play a CD

for at least 10 minutes

check playability

playability

ok ?

"fast" lens cleaning

check playability

playability

ok ?

For flap loaders (= access to CD drive possible) cleaning method

is recommended

add Info for customer

"SET OK"

return set

- For description - see following pages

Exchange CDM

INSTRUCTIONS ON CD PLAYABILITY

1 - 7

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

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

10seconds

LIQUID LENS CLEANING

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.

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.

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.

SERVICE TEST PROGRAM

2-1

How to read software version,

1. Plug A/C to power on and under NO DISC status, press and hold PLAY and DBB buttons for 5 seconds, LCD Display shows existing CD software version "CD - V029" and MCU software version “MCU - 013”.

3-1

SET BLOCK & WIRING DIAGRAM

+ 19 hidden pages