Philips FWM-208 Service Manual

120W Mini Hi-Fi System
FWM208
-/55/77
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
AMP board
Circuit diagram .........................................................................4-1
Layout diagram ..................................................................4-2..4-5
LCD board
Circuit diagram .........................................................................5-1
Layout diagram ..................................................................5-2..5-3
CD board
Circuit diagram ..................................................................6-1..6-2
Layout diagram ..................................................................6-3..6-4
Exploded view diagram .................................................................7-1
Revision list....................................................................................8-1
©
Copyright 2010 Philips Consumer Electronics B.V. Eindhoven, The Netherlands
Published by LX 1010 Service Audio Subject to modification
Version 1.1
3141 785 34921
TECHNICAL SPECIFICATION
1 - 2
Amplifier
Rated Output Power 4X30W RMS
Frequency Response 63 - 16000 Hz, ±3dB
Signal to Noise Ratio >62dB
Disc
Laser Type Semiconductor
Disc Diameter 12cm/8cm
SupportDisc CD-DA,CD-R,
CD-RW, MP3-CD, WMA-CD
Audio DAC 24Bits / 44.1kHz
Total Harmonic Distortion
Frequency Response 63Hz - 16kHz
S/N Ratio >65dBA
<1%
General information
AC power 110 - 127V/220 -
240V, 50/60Hz
Operation power consumption
Standby power consumption
USB direct Version 2.0/1.1
Dimensions
- Main Unit (W x H x D)
- Speaker Box (W x H xD)
Weight
- Main Unit
-SpeakerBox
55W
8W
292 x 285 x 220 mm 310 x 207 x 186 mm
3.8 kg
1.3 kg
Tuner
FM
Tuning Range 87.5 - 108 MHz
Tuni ng grid 50 KHz
Sensitivity
- Mono, 26dB S/N Ratio
- Stereo, 46dB S/N Ratio
Search Selectivity <28 dBu
Total Harmonic Distortion <3%
Signal to Noise Ratio >45 dB
<22 dBu <45 dBu
MW
Tuning Range 530 - 1700 kHz
Speakers
Speaker Impedance 4ohm
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
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