Philips FWM352, FWM371 Schematic

Service Manual

MP3 3CDC Mini System

FWM352,FWM371

all versions

TABLE OF CONTENTS

Handling chip components ............................................................1-1

Information about lead-free soldering............................................1-2

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

Service tools ..................................................................................2-1

Service measurement setup..........................................................2-2

Connections and controls.......................................................3-1..3-3

Maintenance and troubleshooting .................................................3-4

Disassembly diagram .............................................................4-1..4-2

Set block diagram..........................................................................5-1

Set wiring diagram.........................................................................5-2

FRONT BOARD

circuit diagram ..........................................................................6-1

layout diagram...................................................................6-2..6-3

circuit diagram(mic part) ...........................................................6-4

layout diagram(ant&currouse motor&drawer motor board) ......6-4

MAIN BOARD

circuit diagram(tuner part).........................................................7-1

circuit diagram(tape part)..........................................................7-2

circuit diagram ..........................................................................7-3

layout diagram ...................................................................7-4..7-5

AMP BOARD

circuit diagram ..........................................................................8-1

layout diagram ..........................................................................8-2

POWER BOARD

circuit diagram ..........................................................................9-1

layout diagram(for FWM352) ....................................................9-2

layout diagram(for FWM371)....................................................9-2

3CDC BOARD

circuit diagram ............................................................. 10-1..10-2

layout diagram ...............................................................10-3..10-4

Exploded view diagram................................................................11-1

Mechanical partslist .....................................................................11-2

Electrical partslist................................................................12-1..12-6

New main board and Front board W/S 3.1

circuit diagram

layout diagram ...............................................................13-1..13-6

Revision list..................................................................................14-1

CLASS 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 0729 Service Audio Printed in The Netherlands Subject to modification

LASER PRODUCT

3141 785 30763

Version 1.3

1 - 1

HANDLING CHIP COMPONENTS

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:

• 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 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 solder tools applicable for lead-free solder alloy. The solder tool must be able

• Adjust your solder tool so that a temperature around

• Mix of lead-free solder alloy / parts with leaded solder alloy / parts is possible but PHILIPS recommends strongly to avoid mixed

• Use only original spare-parts listed in the Service-Manuals. Not listed standard-material (commodities) has to be purchased at

• Special information for BGA-ICs:

• For sets produced before 1.1.2005 (except products of 2004), containing leaded solder-alloy and components, all needed spare-parts

• On our website www.atyourservice.ce.Philips.com

o To reach at least a solder-temperature of 40 o To stabilize the adjusted temperature at the solder-tip o To exchange solder-tips for different applications.

solder-joint should not exceed ~ 4 sec. Avoid temperatures above 400 otherwise 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.

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 alloy (SAC305).

external companies.

- 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 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.

will be available till the end of the service-period. For repair of such sets nothing changes.

BGA-de-/soldering (+ baking instructions)

∗

Heating-profiles of BGAs and other ICs used in Philips-sets

∗

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

Im portant note you avoid mixing solder-alloys ( leaded/ lead -free). So best to always use SAC3 05 and the higher temperatures belong to th is.

Due to lead-free technology some rules have to be respected by the workshop during a repair:

: In fact also product s of year 2004 must be treated in this way as long as

− is reached and stabilized at the solder joint. Heating-time of the

you find more information to:

For additional questions please contact your local repair-helpdesk.

You will find this and more technical information within the "magazine", chapter "workshop news".

SERVICE INSTRUCTION

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.

· 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):

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 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 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 Power plug.

• Check the cabinet for defects, to avoid touching of any

inner parts by the customer.

2 - 1

TECHNICAL SPECIFICATIONS

GENERAL

Mains voltage

Mains frequency

Battery Power consumption

Dimension (W x H x D) Weight (excluding packing and batteries)

FWM352/12 FWM352/55 FWM352/98 FWM371/55 FWM352/12 FWM352/55 FWM352/98 FWM371/55

remote

normal normal

Standby

230V

120/230V

50 Hz

60 Hz

50/

50/60 Hz

::3 V (AAA x 2)

70W (FWM352)

80W (FWM371) :< 15 W : 265 x 310 x 384 mm ::5.5 Kg

AMPLIFIER

Output power mains Speaker impedance Frequency response

mains

:2 x 50W

2 x 4 ohm

: :

20 Hz - 20 kHz (±3dB)

TUNER - FM SECTION

Tuning range : 87.5 - 108 MHz IF frequency Sensitivity Selectivity IF Rejection Image Rejection Distortion

Tuning Grid

300kHz : > 33 dB

: 10.7 MHz ± 0.02 MHz :< 22 dBf at 26dB

:> 60 dB :> 25dB :< 3 % :

50K Hz

TUNER - AM SECTION

Tuning range :

Tuning Grid IF frequency Sensitivity

Selectivity S9/300kHz IF rejection Distortion Image rejection

531 - 1602 kHz : 530 - 1700 kHz :

9/10K Hz :

450 kHz ± 1 kHz

≤ 3.25 mV/m at 26dB

: :> 12 dB :

:> 24 dB :< 5% :

:> 20 dB

AUDIO CASSETTE RECORDER

Number of tracks : 1 stereo Tape speed : 4.76 cm/sec + 3/-2% Wow & flutter : < 0.4 % JIS Unwtd. Fast wind/rewind C60 : < 130 sec. Frequency response P/B : 100 - 8000 Hz S/N ratio : > 36 dB

COMPACT DISC

S/N ratio unwtd. > 50 dB Channel difference 1 kHz : < 2 dB Crosstalk 1 kHz : > 30 dB Frequency response : ± 2dB at 100Hz THD(1kHz,0dB) : 1.5%

SERVICE TOOLS

Audio signal disc SBC 429.......................................................................4822 397 30184

Playability test disc SBC 444 Test disc 5 (disc without errors ) + Test disc 5A (disc with dropout errors, black spots and fingerprints)

SBC 426/426A.....................................................................4822 397 30096

Burn in test disc (65 min. 1kHz signal at -30 dB level without “pause”)

...................................................................4822 397 30245

.....4822 397 30155

AVAILABLE ESD PROTECTION EQUIPMENT

anti-static table mat

anti-static wristband connection box (3 press stud connections, 1MΩ) 4822 320 11307 extendible cable (2m, 2MΩ, to connect wristband to connection box) 4822 320 11305 connecting cable (3m, 2MΩ, to connect table mat to connection box) 4822 320 11306 earth cable (1MΩ, to connect any product to mat or to connection box) 4822 320 11308 KIT ESD3 (combining all 6 prior products - small table mat) 4822 310 10671 wristband tester 4822 344 13999

large 1200x650x1.25mm 4822 466 10953

small 600x650x1.25m 4822 466 10958

4822 395 10223

2 - 2

ERVICE MEASUREMENT

Tuner SW

RF Generator

e.g. PM5326

Aerial replacement

DUT

Capacitor

Ri=50Ω

R=50Ω

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).

Tuner AM (MW,LW)

RF Generator

e.g. PM5326

Ri=50Ω

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 Audio Signal Disc SBC429 4822 397 30184 (replaces test disc 3) L.P.F. = 13

order filter 4822 395 30204

DUT

Low pass filter 22kHz

LEVEL METER

e.g. Sennheiser UPM550

with FF-filter

S/N and distortion meter

e.g. Sound Technology ST1700B

3 - 1

CONNECTION AND CONTROLS

ons

reparat

Connecting other equipment to your

system

Use a cinch cable to connect AUX/CDR to the

analogue audio out terminals of an external

equipment (TV, VCR, Laser Disc player, DVD

player or CD Recorder).

Optional connection

The optional equipment and connecting cords

are not supplied. Refer to the operating

instructions of the connected equipment for

details.

Note:

– If you are connecting equipment with a mono

output (a single audio out terminal), connect it to

the AUX/CDR left terminal. Alternatively, you can

use a “single to double” cinch cable (the output

sound still remain mono).

Inserting batteries into the

remote control

Insert two batteries (Type R03 or AAA) into the

remote control with the correct polarity as

indicated by the "+" and "-" symbols inside

the battery compar tment.

CAUTION!

– Remove batteries if they are exhausted

or will not be used for a long time.

– Do not use old and new or different

types of batteries in combination.

– Batteries contain chemical substances, so

they should be disposed of properly.

FM Antenna

FM wire antenna

For better FM stereo reception, connect an

outdoor FM antenna to the FM ANTENNA

terminal.

Front Speakers

Connect the speaker wires to the SPEAKERS

terminals, right speaker to "R" and left speaker to

"L", coloured (marked) wire to "+" and black

(unmarked) wire to "-".

C Speakers Connection

(left)

Speaker

this happens, let the system cool down

Fully insert the stripped portion of the speaker

wire into the terminal as shown.

before reusing it (not available for all versions).

Connect the supplied MW loop antenna and FM

B Antennas Connection

Notes:

–For optimal sound performance, use the

supplied speakers.

– Do not connect more than one speaker to any

antenna to the respective terminals. Adjust the

position of the antenna for optimal reception.

MW Antenna

speaker terminals.

– Do not connect speakers with an impedance

lower than the speakers supplied. Please refer to

the SPECIFICATIONS section of this manual.

one pair of

Fix the claw

to the slot

MW ANTENNA

Position the antenna as far as possible from a TV,

VCR or other radiation source.

antenna

MW loop

Preparations

AM ANTENNA

FM ANTENNA

Speaker

R L

AUX/CDR

(right)

SPEAKERS 6

AC power cord

Rear connections

The type plate is located at the rear of the

system.

For users in the U.K.: please follow the

instructions on page 2.

Before connecting the AC power cord to the

wall outlet, ensure that all other connections

have been made.

WARNING!

–For optimal performance, use only the

original power cable.

–Never make or change any connections

with the power switched on.

– High voltage! Do not open.You run the

risk of getting an electric shock.

A Powe r

– The machine does not contain any user-

serviceable parts.

– Modification of the product could result

in hazardous radiation of EMC or other

unsafe operation.

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

3 - 2

CONNECTION AND CONTROLS

5 6

ALBUM (-/ +)

SEARCH•TUNING

for MP3-CD ............. to select previous/next

! Mode Selection

Controls on the system and

remote control

STANDBY-ON/ ECO POWER (B)

– switches the system on or to Eco Power

Controls (illustrations on page 3)

album.

backward/forward.

radio frequency.

for CD/ MP3-CD .. (press and hold) to search

for Tuner ..................... to tune to a lower or higher

for Clock .................... to set the hour.

standby/normal standby with clock display.

DISC (CD 1/2/3)

TUNER

2 Source selection – to select the following:

– to select disc tray 1, 2 or 3.

programme.

STOP

for CD/ MP3-CD .. to stop playback or to clear a

for Tuner ..................... (on the system only) to stop

TAPE

– to select waveband: FM or MW.

– to select tape deck.

programming.

activate/deactivate the

demonstration.

for Demo ................... (on the system only) to

for Clock .................... to exit clock setting.

for Plug&Play ............ (on the system only) to exit

AUX

AUX.

3 iR SENSOR

– to select the input for an additional appliance:

4 VOLUME (VOL +/-)

– infrared sensor for remote control.

plug&play mode.

PLAY•PAUSE

for CD/ MP3-CD .. to start or interr upt playback.

DBB 2, DBB 3 or DBB OFF).

5 DBB

– to increase or decrease the volume.

– to select the desired bass boost level. (DBB 1,

6 DSC

the current, previous, or next

track.

station.

¡ ™

for MP3-CD ............ to select previous/next title.

for CD ........................ to skip to the beginning of

for Tuner .................... to select a preset radio

PRESET / ( TITLE)

settings (OPTIMAL, TECHNO, ROCK or JAZZ).

7 DISC 1/2/3

– Selects different types of preset sound equaliser

for Clock ................... to set the minute.

@ DISC CHANGE

8 Display screen

– to select a disc tray for playback.

9 OPEN•CLOSE

– to view the current status of the system.

–to change disc(s).

– to open or close the disc tray.

# CLOCK•TIMER

$ n

– to view the clock.

– set the clock or set the timer (on the set only).

– to connect headphones.

stations.

for CD/ MP3-CD .. to programme disc tracks.

for Tuner ..................... to programme preset radio

0 PROGRAM

MUTE

AUX

TUNER

CD1/2/3

PROGRAM SHUFFLE

REPEAT

™

VOL

TITLE

ALBUM

TIMER

SLEEP

ON/OFF

DIM

DISPLAY

()6

DBB

DSC

$@#

^9%

3 - 3

CONNECTION AND CONTROLS

Controls

% MIC IN

^ MIC VOLUME

– to connect microphone

& Ta pe Deck Operation

– to adjust the mixing level for Karaoke

5 6

•

RECORD ...starts recording.

PLAY 2 ............ starts playback.

SEARCH / fast rewinds/winds the tape.

compartment.

;

................................. stops the tape; opens the tape

STOP•OPEN 0

PAUSE ....... interrupts recording or playback.

, for example).

Notes for remote control:

– First, select the source you wish to control

by pressing one of the source select keys on

the remote control (CD or TUNER, for

screen : DIM 1, DIM 2, DIM 3 or DIM OFF.

* Disc tray

( DISPLAY

) DIM MODE

– to select disc information display mode.

¡ SLEEP (TIMER ON/OFF)

– to select different brightness for the display

– to activate/deactivate or set the sleep timer.

– activates/deactivates the timer function.

™ REPEAT

repeatedly.

– to playback track(s)/disc(s)/programme

MUTE

≤

£ SHUFFLE

– turns on/off the random play mode.

–mutes or restores the volume.

example).

– Then select the desired function ( ,

¡ ™

3 - 4

MAINTENANCE AND TROUBLESHOOTING

If the signal is too weak, adjust the antenna or

connect an external antenna for better

reception.

Increase the distance between the Mini HiFi

System and your TV or VCR.

Clean deck parts, see “Maintenance”.

Use only NORMAL (IEC I) tape.

Apply a piece of adhesive tape over the missing

tab space.

Remove and reconnect the AC power plug and

switch on the system again.

Adjust the volume.

Disconnect the headphones.

Check that the speakers are connec ted

correctly.

Check if the stripped speaker wire is clamped.

Make sure the MP3-CD was recorded within

32-256 kbps bit rate with sampling frequencies

at 48 kHz, 44.1 kHz or 32 kHz.

¡ ™ 2

Check the speaker connections and location.

Select the source (CD or TUNER, for example)

before pressing the function button ( , , ).

Reduce the distance between the remote

control and the system.

Insert the batteries with their polarities

(+/– signs) aligned as indicated.

Replace the batteries.

Point the remote control directly towards the IR

sensor.

Set the clock correctly.

Press and hold TIMER ON/OFF to switch on the

timer.

If recording or tape dubbing is in progress, stop

recording.

Press DIM to select DIM OFF display mode.

Power has been interrupted or the power cord

has been disconnected. Reset the clock/timer.

Radio reception is poor.

Cleaning the Heads and the Tape Paths

Recording or playback cannot be made.

pressure roller(s) C after every 50 hours of

To ensure good recording and playback quality,

clean the heads A, the capstan(s) B, and

tape operation.

Use a cotton swab slightly moistened with

The system does not react when buttons

are pressed.

Sound cannot be heard or is of poor

quality.

cleaning fluid or alcohol.

You also can clean the heads by playing a

cleaning tape once.

C CB

Demagnetising the heads

Use a demagnetising tape available at your

The left and right sound outputs are

dealer.

reversed.

The remote control does not function

properly.

The time is not working.

Not all lighted buttons are showing light.

Solution

Insert a disc.

The Clock/Timer setting is erased.

Check if the disc is inserted upside down.

Wait until the moisture condensation at the lens

has cleared.

Replace or clean the disc, see “Maintenance”.

Use a finalized CD-RW or a correct MP3-CD

format disc.

Use a finalised CD-RW or CD-R.

Cleaning the Cabinet

Use a soft cloth slightly moistened with a mild

detergent solution. Do not use a solution

containing alcohol, spirits, ammonia or abrasives.

Cleaning Discs

Maintenance

When a disc becomes dirty,

clean it with a cleaning cloth.

Wipe the disc from the centre

out. Do not wipe in circular

motion.

Do not use solvents such as

benzene, thinner, commercially available cleaners,

or antistatic spray intended for analogue records.

Cleaning the disc lens

After prolonged use, dirt or dust may

accumulate at the disc lens. To ensure good

playback quality, clean the disc lens with Philips

CD Lens Cleaner or any commercially available

cleaner. Follow the instructions supplied with

cleaner.

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.

Tr oubleshooting

Problem

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.

“NO DISC” is displayed.

“DISC NOT FINALIZED” is displayed.

4 - 14 - 1

DISASSEMBLY DIAGRAM

Dismantling of the Cassette Cover

1) Loosen 4 screws to remove the Cassette Deck.

2) Loosen 4 screws to remove the Cassette Keys .

Dismantling of the CDC Module and Front Panel

1) Loosen 4 screws to remove the Cover T op of the set.

2) Loosen 2 screws to remove the Panel Left and 2 screws to remove the Panel Right of the set.

3) Slide out the CDC T ray as shown in the diagram below with the help of a flat head screw driver.

3) Push the catch outside and take out damper gear assembly as indicated.

Remove the Cassette Cover

as indicated.

4) Remove the Cover Tray CDC as indicated.

Sliding Out The CDC Tray

5) Loosen 2 screws A and 2 screws B to remove the CDC Module as indicated.

6) Remove 2 screws at the bottom to separate the Front Panel Assembly from the Plate Bottom .

Front View CDC

Remove CDC Module

Remove Cover Tray CDC

4 - 2 4 - 2

DISASSEMBLY DIAGRAM

Dismantling of Rear Portion

A Remove the back panel : A1 Remove screws M3x12 (4pcs) A2 Remove screws M3x10 (14pcs)

B Remove Left and Right panel : B1 Remove screws M3x10 (2pcs) B2 Remove screws M3x10 (2pcs)

B1 B2

Dismantling of the Front Cabinet and PCB Boards

C Remove Front Cabinet:

Remove screws M3x10 (2pcs)

D Remove screws M3x10 (3pcs) E Remove screws M3x10 (12pcs)

D E

F Remove screws M3x10 (4pcs)

5 - 15 - 1

SET BLOCK DIAGRAM

5 - 2 5 - 2

SET WIRING DIAGRAM

6 - 1 6 - 1

CIRCUIT DIAGRAM - FRONT BOARD

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