Philips FWC-185 Service Manual

Mini System

FWC185

For /77/79/98 version

TABLE OF CONTENTS

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

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

Leadfree and safety information ................................................... 1-2

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

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

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

Disassembly diagram ............................................................ 4-1...4-3

Wiring diagram .............................................................................. 5-1

Display board

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

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

CD board

circuit diagram. ......................................................................... 7-1

layout diagram .......................................................................... 7-2

Main board

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

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

Power board

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

layout diagram .......................................................................... 9-1

Exploded view diagram ................................................................. 10-1

Mechanical partslist ....................................................................... 10-2

Electrical partslist ..............................................................11-1...11-2

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 YB 0628 Service Audio Printed in The Netherlands Subject to modification

Version 1.0

HANDLING CHIP COMPONENTS

1 - 1

1 - 2

SPECIFICATIONS

2 - 1

GENERAL:

Mains voltage : 240V Mains frequency : 50 Hz Power consumption : < 90W max. < 8 W at standby Clock accuracy : 4 seconds per day Dimension center unit : 265 x 295 x 320 mm

TUNER: FM

Tuning range : 87.5 – 108 MHz IF Frequency : 10.7 MHz ± 20kHz Aerial input : wire Sensitivity at 26sb S/N : < 22 dB Selectivity at 600 kHz Bandwidth : > 45 dB IF rejection : > 50 dB Image rejection : > 20 dB Distortion : < 7 % Crosstalk : > 22 dB

Tuning range : 531 – 1602kHz Grid : 9 kHz IF Frequency : 465 kHz ± 5 kHz Aerial input : Bar antenna Sensitivity at 26sb S/N : < 4.4 mV/M Selectivity at 18 kHz Bandwidth : > 22 dB IF rejection : > 45 dB Image rejection : > 28 dB Distortion : < 5%

AMPLIFIER:

Output power : 2 x 15 W RMS Speaker impedance : 3 ohm Frequency response Within ± 3dB : 60Hz – 16 kHz Dynamic Bass Boost ON : 8dB ± 3dB at 60Hz

CASSETTE RECORDER:

Number of tracks : 2 x 2 stereo Tape speed : 4.76 cm/sec +2.5/-1.5% Wow and flutter : < 0.35% DIN Fast-wind/rewind time : < 130 sec. With C-60 Bias frequency : 75 ± 10 kHz R/P frequency response : 125 – 8 kHz (8 dB) Signal to noise radio : > 42 dB with type 1 tape

COMPACT DISC:

Number of programming track : 30 Frequency response Within ± 3 dB : 30 Hz – 16 kHz Signal/Noise ratio : 76 dB/A-weighted Distortion at 1 kHz : < 3% Channel separation at 1 kHz : > 25 dB

SERVICE MEASUREMENT

2 - 2

Tuner FW

RF Generator

e.g. PM5326

DUT

Bandpass

250Hz-15kHz

e.g. 7122 707 48001

LF Voltmeter

e.g. PM2534

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 250kHz) to eliminate hum (50Hz, 100Hz).

CD RECORDER

Use Audio Signal Disc SBC429 4822 397 30184 (replaces test disc 3)

DUT

S/N and distortion meter

e.g. Sound Technology ST1700B

LEVEL METER

e.g. Sennheiser UPM550

with FF-filter

Use Universal Test Cassette Fe SBC420 4822 397 30071

LF Generator

e.g. PM5110

DUT

Ri=50

S/N and distortion meter

e.g. Sound Technology ST1700B

LEVEL METER

e.g. Sennheiser UPM550

with FF-filter

CONNECTION AND CONTROLS

3 - 1

, 4 3

@ Ta pe deck

# FUNCTION: TUNER, TAPE, CD

– selects CD, tape or radio source of sound

Controls on the system

Disc trays

– programs tracks and reviews the program

$ PROGRAM

PROGRAM indicator

REPEAT indicator

% n

TUNING rotary

tunes to radio stations

Helpful hints:

before you plug in the headphones.

– Connecting headphones will switch off the

– Adjust the volume to a moderate level

3.5 mm headphone socket

–

OPEN/CLOSE

press to open/close the disc tray

DBB

selects a disc tray for playback*V

–

REPEAT

OLUME

– adjusts the volume level

BAND (MW•FM•FM STEREO)

speakers.

starts or pauses CD playback

^ ÉÅ

–

& DISC: 1/ 2/ 3

skips or searches CD tracks backwards/

4 / ¢

forwards

turns the bass enhancement on/off

POWER

mode.)REMOTE SENSOR

(

– switches the system on or to standby

STOPÇ

stops CD playback;

control towards this sensor.

– sensor for the infrared remote control

Helpful hints: Always point the remote

ases a CD program r

Ta pe deck keys

£ .................... starts playback

RECORD .. star ts recording

¡ FM ST. indicator

™ Power indicator

stops playback;

à /á ............ fast rewinds/winds a tape

70 ....................

recording

............................. opens the tape holder

Å ...................... interrupts playback or

™¡)

(

CONNECTION AND CONTROLS

(left)

Speaker

3 - 2

power cord

FM wire antenna

Speaker

(right)

Black

Red

Press the clip of the black terminal and fully

insert the stripped portion of the black (or

unmarked) speaker cable into the socket, then



Warning:

Rear connections

release the clip.

B FM antenna

Never make or change connections with

the power supply switched on.

ay as possible from the TV, VCR or other

adiation sources). r

in different positions for optimal reception (as far

Fix the antenna’s end to the wall.

1 Extend the wire antenna and move the antenna

Speakers connection

Use the supplied speakers only. Using other

and black ”

and left speaker to R”

speakers can damage the set or the sound

”, red (labelled red) wire to “

quality will be negatively affected.

Connect the speaker wires to the SPEAKERS

terminals, right speaker to “

“L

”.

Black

Red

(labelled black) wire to “-

the stripped portion of the coloured (or

marked) speaker cable into the socket, then

Press the clip of the red terminal and fully insert

switches the system on or to standby

mode2DIGITS 0 - +10

1 POWER ON

–

Remote control

– CD: selects a track number

3 REPEAT

– selects repeat modes

4ÉÅ– starts or pauses CD playback

102

DISC 1/DISC 2/DISC 3

selects a disc tray for playback

5 DISC

–

987

OLUME

DISC CHANGE

– changes disc trays

– adjusts the volume level

7 STOP

stops CD playback

–

skips or searches CD tracks backwards/

forwards

–

– erase a CD program

8 4 / ¢

programs tracks and reviews the program

9 PROGRAM

–

press to open/closes the disc tray

0 OPEN/CLOSE

–

+ 16 hidden pages