Philips MCM-233 Service Manual

Sleek micro music system

MCM233

-/12/55/79/78/98

CONTENTS

Technical specification ..................................................................1-2

Service measurement setup..........................................................1-3

Service aids .................................................................................1-4

Instructions on CD playability ...............................................2-1.. 2-2

Block diagram................................................................................3-1

Wiring diagram ..............................................................................3-2

Main board

Circuit diagram ..................................................................4-1..4-2

Layout diagram..................................................................4-3..4-4

Key board

Circuit diagram .........................................................................5-1

Layout diagram.........................................................................5-2

LCD board

Circuit diagram .........................................................................6-1

Layout diagram.........................................................................6-2

Headphone board

Circuit diagram .........................................................................7-1

Layout diagram.........................................................................7-2

Exploded view diagram .................................................................8-1

Revision list....................................................................................9-1

©

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 LX 1042 Service Audio Subject to modification

Version 1.2

3141 785 34892

TECHNICAL SPECIFICATION

1 - 2

Ampli?er

Total output power 2 x 10 W RMS

Frequency response 80 H z - 16 kH z, ± 3 dB

Signal to noise ra o > 60 dB

MP3 link input

0.5 V RMS 20 k

Disc

Laser type Semiconductor

Disc diameter 12cm /8 cm

Support disc C D -DA , C D-R, CD -

RW, MP3-C D, W MACD

Audio DA C 24 Bits / 44.1 kH z

Total harmonic distor on < 1.5%

Frequency response

60 Hz -16 kHz(44.1 kHz)

Signal to noise ra o > 55 dBA

Tuner

Tuning range FM: 87.5 - 108 MHz

Tuning grid 50 KH z

Number of presets 20

Speakers

Speaker impedance

2 x 10 W , 6

General informa on

AC power 100-240V~ ,

50/60H Z

Opera on Power Co nsump on

Standby Power Co nsump on 1 W

Eco Power Standby Power Co nsump on

USB Direct Version 2.0/1.1

Dimensions

- Main Unit (W x H x D )

Weight

-MainUnit 2.7kg

15 W

0.8 W

565 x 245 x 104 mm

VERSION VARIATION

Type /Versions:

Board in used:

LCD BOARD

KEY BOARD POWER KEY BOARD OPEN/CLOSE BOARD

REMOTE INCEPT BOARD RADIO BOARD MAIN BOARD

USB BOARD

Features

RDS & DAB VOLTAGE SELECTOR ECO STANDBY - DARK

* TIPS : C -- Component Lever Repair.

M -- Module Lever Repair

√

-- Used

Service policy

Type /Versions:

Feature diffrence

/12

MCM233

/55

/78

MCM233

C C C C

/55

C C C C

C

M/C

C

/78

√

C C C C

C C C

C

√

/79

M/C

C C C

C C

M/C

C

/79

√

/98

e

MEASUREMENT SETUP

Tuner FM

1-3

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).

CD

Use Audio Signal Disc (replaces test disc 3)

DUT

L

R

SBC429 4822 397 30184

S/N and distortion meter

e.g. Sound Technology ST1700B

LEVEL METER

e.g. Sennheiser UPM550

-

Recorder

Use Universal Test Cassette CrO2 SBC419 4822 397 30069

or Universal Test Cassette

LF Generator

e.g. PM5110

Fe SBC420 4822 397 30071

DUT

L

R

S/N and distortion met

e.g. Sound Technology ST170

LEVEL METER

e.g. Sennheiser UPM550

with FF-filter

SERVICE AIDS

1-4

GB

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 that you are connected with the same potential as the mass of the set via a wrist wrap with resistance. Keep components and tools also at this potential.

WARNING

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

!

.

ESD

CLASS 1

LASER PRODUCT

Lead free

INSTRUCTIONS ON CD PLAYABILITY

Customer complaint

"CD related problem"

Set remains closed!

check playability

1

2 - 1

playability

ok ?

Y

Play a CD

for at least 10 minutes

check playability

playability

ok ?

Y

N

"fast" lens cleaning

check playability

playability

ok ?

N

3

N

Y

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

4 is recommended

add Info for customer

"SET OK"

2

return set

1 - 4 For description - see following pages

Exchange CDM

INSTRUCTIONS ON CD PLAYABILITY

2 - 2

1

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

4

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.

2

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 3) 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.

SET BLOCK DIAGRAM

3 - 1 3 - 1

SET WIRING DIAGRAM

3 - 2 3- 2

3-3 3-3

1)R

(BT3x12)

4)Remove the 4pcs screws(PT 3x8) on Main BD, rip off the black paper from FCC cable on CD deck, discharge Main BD and place it well;

Set disassembly diagram

omove the 12pcs screws

2)Remove the FFC cable on IPOD BD from Main BD,1st get remote control lens out, then remove the 4pcs screws (PA 2.3x8) which fix IPOD BD to discharge IPOD BD;

3)Remove all cables on Main BD; PS: Get your hand to the Main BD as close as possible when you unplug the cables to avoid destroying cables;

on the side cabinet to discharge the rear cabinet and place it well;

pic1

IPOD cable

IPOD Assembly

pic2

Remote

Remote Control

Control

FFC cable

FFC cable to CD

to CD

to CD deck

deck

2P cable to

right SPK

Open

button

DC cable

pic3

Display BD

Display BD cable

cable

6P Deck cable

Motor

Motor Cable

Cable

2P cable to

left SPK

pic4

5)Remove the 4pcs screws(PT3x8) on CD deck, please add some soldering on the weld protect point and keep it in a ant-static bag;

6)Remove the 4pcs screws(PA 2.3x8 ) on Display BD, discharge Display BD and paste protect film on it and place it well;

7)Draw the CD door with your right hand,press one buckle with your left hand(pic 7-1),then press the other buckle(pic 7-2),discharge CD door and place it well;

protect

weld

point

pic5 pic6 pic7‐1 pic7‐2

buckle

pic7‐3

buckle

CIRCUIT DIAGRAM - MAIN BOARD PART 1

4 - 14 - 1

CIRCUIT DIAGARM - MAIN BOARD PART 2

4 - 2 4 - 2

LAYOUT DIAGARM - MAIN BOARD COMPONENT SIDE VIEW

4 - 3 4 - 3

LAYOUT DIAGARM - MAIN BOARD COPPER SIDE VIEW

4 - 4 4 - 4

CIRCUIT DIAGRAM - KEY BOARD

5 - 1 5 - 1

LAYOUT DIAGARM - KEY BOARD

5 - 2 5 - 2

CIRCUIT DIAGARM - LCD BOARD

6 -1 6 - 1

LAYOUT DIAGRAM - LCD BOARD

6 - 2 6 - 2

CIRCUIT DIAGARM - HEADPHONE BOARD

7 - 1 7 - 1

6 5 4

CN501

3 2 1

L516

L515

L514 0

L513

0

USB501

USB

1

2

3

4

IC501

ETK4800

C514

CN502

TO main BD

1 2 3 4 5 6 7 8 9 10

GND MUTE VDD

HP_DET AUX_LCH GND AUX_RCH

L501

L504

C519

102

22K

0

OUT_L

OUT_R

C518

102

22K

225

C503

IN4148

D501

C510 15K R508

220P

VDD

R510 22K

22K

R537

NO Headphone 0 YES Headphone 1

R509 15K

R511

1

2

3

4

C563

OUT1

IN1-

IN1+

GND

100/10

C509

C565

225

HP JACK

VCC

OUT2

IN2-

IN2+

104

R501

J501

220/10

8

7

VDD

6

5

15K

L505 L506

R503

15K

C505

220P

C511

C515

100/10

0 0

104

8550

Q503

R532 100K

22K

C513

220/10

R534

C564

100/10

1K

Q504

C8050

R536

R535

C506

R533

22K

Q502

C8050

102

HP_LCH

HP_RCH

102

C517

JACK BOARD

22K

R515

22K

R512

R505

R513

L509

L510 L511

L512

0

L

0

R

0

G

J502

AUX JACK

LAYOUT DIAGARM - HEADPHONE BOARD

7 - 27 - 2

EXPLODED VIEW DIAGRAM

CDT

B4

C

8 - 1 8 - 1

B1 B7

K1

B5

MG

LBC LCD601

FP

TO1

P

LL

B10

MGN

MP

MD

B9

CG

CM

B8

K3

SB

B2

RF

RC

RI

TO2

B6

REVISION LIST

V

Version 1.0 (3141 785 34890)

* Initial Release

V

Version 1.1 (3141 785 34891)

* Add /55

V

Version 1.2 (3141 785 34892)

* Add /78

V

Version 1.3 (3141 785 34893)

* Add /98

9-1

Philips MCM-233 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual