FW-C28.pdf

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Mini System
FW-C28/ 21M/22/34
Service
Service
Service
Service Manual
COMPACT
DIGITAL AUDIO
TABLE OF CONTENTS Page
Location of pc boards & Version variations ................ 1-2
Technical Specifications ............................................. 1-3
Measurement setup .................................................... 1-4
Service Aids, Safety Instruction, etc. .......................... 1-5
Instruction for use: European version excerpt .......... 2-1
Additional features .................. 2-10
Disassembly Instructions & Service positions ........... 3-1
Service Test Programs ............................................... 3-4
Set Block diagram ......................................................... 4
Set Wiring diagram ........................................................ 5
Front Board .................................................................... 6
Tuner Board: ECO5 Sys .......................................... 7B
Tuner 95 ............................................. 7D
ETF7 Tape Module ........................................................ 9
3CDC-99 Module ......................................................... 10
Combi Board ................................................................ 11
Set Mechanical Exploded view & parts list ................. 12
CLASS 1
LASER PRODUCT
© Copyright 2000 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.
GB
3139 785 22140
Published by KC 0007 Service Audio
Printed in The Netherlands
Subject to modification
PCS 103 446
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1-2
LOCATION OF PC BOARDS
VERSION VARIATIONS:
Type /Versions:
FW-C28
/21M
/22
/33
/34
Features &
Board in used:
*
Dolby B
Incredible Surround
Karaoke
x
News
x
x
RDS
x
x
Rotary Encoder (volume control)
x
x
x
x
Jog Shuttle
Voltage Selector
x
Aux Input
x
x
x
x
Digital Output
Headphone Socket
x
x
x
x
Line Output
Subwoofer Output
Surround Output
Matrix Surround Loudspeakers
Tuner board - ECO5 Sys
x
x
x
Tuner board - Tuner 95
x
Standby with clock display
x
x
x
x
* For India only
PCS 103 447
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1-3
SPECIFICATIONS
GENERAL:
Mains voltage : 110-127V/220-240V Switchable for /21/21M
120V for /37
220V for /33
220-230V for /22/34
230V for /25
230-240V for /30
Mains frequency : 50/60Hz
Power consumption : < 15W at Standby (Demo mode off)
: 35W when Active
Clock accuracy : < 4 seconds per day
Dimension centre unit : 265 x 310 x 320mm
AMPLIFIER:
Output power : 2 x 15W RMS 2) @ 6 ohm
Frequency response within ± 3dB
: 50Hz-15kHz
Dynamic Bass Boost
: DBB ON, DBB Off 3)
Digital Sound Control
: Jazz, Techno, Optimal, Rock 3)
Input sensitivity
Aux-in : 700mV ± 3dB at 600ohm
Mic : {3.5mV
±
3dB} at 600ohm
Output sensitivity
Headphone : 18mW at 32ohm
CASSETTE RECORDER:
Number of track
TUNER:
FM
Tuning range
: 2 x 2 stereo
Tape speed
: 4.76 cm/sec
±
2%
: 87.5-108MHz
65.81-74MHz for /34 1)
Wow and flutter : < 0.4% DIN
Fast-wind/rewind time C60 : 130 sec
Bias system : 75kHz ± 10kHz
Rec/Pb frequency response within 8dB
Grid
: 50kHz (& 30kHz for /34)
100kHz for /37
: 80Hz - 12.5kHz
IF frequency
: 10.7MHz ± 25kHz
Signal to noise ratio
Type I : > 48dBA
Type II : > 52dBA
Aerial input
: 75ohm coaxial
300ohm click fit for /37
Sensitivity at 26dB S/N
: < 7 µ V
COMPACT DISC:
Measurement done at output conn. of the CDC module.
Frequency response within
Selectivity at 600kHz bandwidth
: > 30dB
Image rejection
: > 25dB [> 60dB]
±
1.5dB : 20Hz - 20kHz
Distortion at RF=1mV, dev. 75kHz
: < 3%
Output level (in Vrms)
: 550mV ± 2dB unloaded
-3dB Limiting point
: < 8 µ V
Signal/Noise ratio (A-weighted)
: > 80dBA
Crosstalk at RF=1mV, dev. 40kHz
: > 18dB
Distortion at 1kHz
: < 0.003%
Channel difference at 1kHz
: <
±
1dB
MW
Tuning range
Channel separation at 1kHz
: > 60dB
: 531-1602kHz
530-1700kHz for /21/37
De-emphasis
: 0 or 15/50
S (Switched by subcode
on the disc)
µ
Grid
: 9kHz
10kHz for /21/37
IF frequency
: 450kHz ± 1kHz
[....] Values indicated are for "Tuner 95 Board" only
{....} Values indicated are for Karaoke version only
1) Default setting is OFF, to switch on please refer to page 3-4
2)
Aerial input
: Frame aerial
Sensitivity at 26dB S/N
: < 4.0mV/M
Selectivity at 18kHz bandwidth
: > 18dB
± 1dB, 1kHz, 10% THD
3) Frequency response in each setting is software controlled.
IF rejection
: > 40dB
Image rejection
: > 28dB
Distortion at RF=50mV, m=80%
: < 5%
LW
Tuning range
: 153-279kHz
Grid
: 3kHz
IF frequency
: 450kHz ± 1kHz
Aerial input
: Frame aerial
Sensitivity at 26dB S/N
: [< 7.0mV/M]
Selectivity at 18kHz bandwidth
: [> 30dB]
IF rejection
: [> 25dB]
Image rejection
: [> 35dB]
Distortion at RF=50mV, m=80%
: [< 5%]
PCS 103 448
1-4
MEASUREMENT SETUP
Tuner FM
Bandpass
250Hz-15kHz
e.g. 7122 707 48001
DUT
LF Voltmeter
e.g. PM2534
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).
Tuner AM (MW,LW)
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
Frame aerial
e.g. 7122 707 89001
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).
Recorder
Use Universal Test Cassette CrO2
CD
Use Audio Signal Disc
(replaces test disc 3)
SBC419 4822 397 30069
SBC429 4822 397 30184
or Universal Test Cassette Fe
SBC420 4822 397 30071
DUT
LF Generator
e.g. PM5110
DUT
L
L
R
R
S/N and distortion meter
e.g. Sound Technology ST1700B
S/N and distortion meter
e.g. Sound Technology ST1700B
LEVEL METER
e.g. Sennheiser UPM550
with FF-filter
LEVEL METER
e.g. Sennheiser UPM550
with FF-filter
PCS 90 113
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1-5
SERVICE AIDS
Service Tools:
Universal Torx driver holder .................................. 4822 395 91019
Torx bit T10 150mm ............................................. 4822 395 50456
Torx driver set T6 - T20 ......................................... 4822 395 50145
Torx driver T10 extended ...................................... 4822 395 50423
ESD Equipment:
Anti-static table mat - large 1200x650x1.25mm ... 4822 466 10953
Anti-static table mat - small 600x650x1.25mm ..... 4822 466 10958
Anti-static wristband .............................................. 4822 395 10223
Connector box (1M
Ω
) ............................................ 4822 320 11307
Extension cable
(to connect wristband to conn. box) .................. 4822 320 11305
Connecting cable
(to connect table mat to conn. box) .................. 4822 320 11306
Earth cable (to connect product to mat or box) .... 4822 320 11308
Complete kit ESD3
(combining all above products) ......................... 4822 320 10671
Wristband tester .................................................... 4822 344 13999
Cassette:
SBC419 Test cassette CrO2 ................................. 4822 397 30069
SBC420 Test cassette Fe ..................................... 4822 397 30071
MTT150 Dolby level 200nWb/M ............................ 4822 397 30271
Compact Disc:
SBC426/426A Test disc 5 + 5A ............................ 4822 397 30096
SBC442 Audio Burn-in Test disc 1kHz ................. 4822 397 30155
SBC429 Audio Signals disc .................................. 4822 397 30184
Dolby Pro-logic Test Disc ...................................... 4822 395 10216
PCS 90 114
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