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 SL0731 Service Audio Printed in The Netherlands Subject to modifi cation. GB 3141 785 31682
Block Diagram ................................................................ 2Wiring Diagram ............................................................... 3Cassette Board & USB Board ........................................ 4Main & USB Board ......................................................... 5CD Board ........................................................................ 6AMP Board ..................................................................... 7Mechanical Exploded View & Parts List ......................... 8
Version 1.2
FWM185/all versions
Revision List ................................................................... 9
1-2
USB PLAYERUSB ................................................................... 12Mb/s, V1.1......................................... support MP3 and WMA filesNumber of albums/folders ................. maximum 99Number of tracks/titles ...................... maximum 400
SPEAKERS2-way Bass Reflex SystemImpedance ........................................................................ 8 Woofer ................................................................... 1x10 cmTweeter ...................................................................... 1x5 cmDimensions (w x h x d)..........21.5x34.9x16.2 (cm)
GENERALAC Power ..................................... 220 – 230 V / 50 HzDimensions (w x h x d) ........... 22x29.2x27.2 (cm)Weight (with/without speakers) ................................................................................................. approx. 4.9 / 2.3 kg
Specifications and external appearance aresubject to change without notice.
AMPLIFIER1 KHz(Low channel - both channels driven)................................................... 30 W per channel (8 )10 KHz(High channel - both channels driven)................................................... 30 W per channel (8 )Total output power ............................................... 120 WSignal-to-noise ratio .......................... 62 dBA (IEC)Frequency response ......... 63 – 16000 Hz, ± 3 dB
CD PLAYERFrequency range .................................. 63 – 16000 HzSignal-to-noise ratio ............................................ 65 dBA
TUNERFM wave range ................................... 87.5 – 108 MHzMW wave range ................................ 531 – 1602 kHz
TAPE DECKFrequency response
Normal tape (type I) ...... 125 – 8000 Hz (8 dB)Signal-to-noise ratio
Normal tape (type I) .................................... 35 dBAWow and flutter ......................................... 0.4% DIN
SPECIFICATION
1-3
LF Generator e.g. PM5110
RecorderUse Universal Test Cassette CrO2 SBC419 4822 397 30069
LEVEL METERe.g. Sennheiser UPM550
with FF-filter
S/N and distortion metee.g. Sound Technology ST170
L
R
DUT
or Universal Test Cassette Fe SBC420 4822 397 30071
LEVEL METERe.g. Sennheiser UPM550
with FF-filter
S/N and distortion metere.g. Sound Technology ST1700B
L
R
DUT
CDUse Audio Signal Disc(replaces test disc 3)
SBC429 4822 397 30184
Bandpass250Hz-15kHz
e.g. 7122 707 48001LF Voltmeter
e.g. PM2534DUT
S/N and distortion meter e.g. Sound Technology ST1700B
Frame aeriale.g. 7122 707 89001
Tuner AM (MW,LW)
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).
RF Generator e.g. PM5326
Ri=
50Ω
Bandpass250Hz-15kHz
e.g. 7122 707 48001LF Voltmeter
e.g. PM2534DUT
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).
Ri=
50Ω
Tuner FM
MEASUREMENT SETUP
1-4
Service Tools:Universal Torx driver holder .................................4822 395 91019
Torx bit T10 150mm ...........................................4822 395 50456
Torx driver set T6-T20 .........................................4822 395 50145
Dolby Pro-logic Test Disc ....................................4822 395 10216
SERVICE AIDS
GB WARNINGAll ICs and many other semi-conductors aresusceptible to electrostatic discharges (ESD).Careless handling during repair can reduce lifedrastically.When repairing, make sure that you areconnected with the same potential as the massof the set via a wrist wrap with resistance.Keep components and tools also at thispotential.
ESD
CLASS 1LASER PRODUCT
GBSafety regulations require that the set be restored to its originalcondition and that parts which are identical with those specified,be usedSafety components are marked by the symbol ! .
Lead free
Set remains closed!
Standard repair procedure
N
Y
Play a CD for at least 10 minutes
Y
playabilityok ?
Nplayabilityok ?
add Info for customer"SET OK"
playabilityok ?
Y
N
check playability
N
Y
playabilityok ?
check playability
check playability
EYE-Patternok ?
N
Y
check "EYE-Pattern"
replace CD Drive
Laser currentok ?
N
Y
check Laser current
CD Drive offsetsok ?
NY
check CD Drive offsets
clean the lens
check playability
return set
Customer complaint"CD related problem"
return set
return set
replace CD Drive
return set
replace CD Drive
return set
replace Signal Processor
return set
"fast" lens cleaning
1
2
3
4
5
6
7
For flap loaders (= access to CD drive possible) cleaning method 4 is recommended
1 - 7 For description - see following pages
INSTRUCTIONS ON CD PLAYABILITY
1-5
1PLAYABILITY CHECK
For sets which are compatible with CD-RW discsuse 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 disturbanceplaying time for: Fingerprint ≥10seconds
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 01:15TR 19 (Fingerprint)TR 10 (1000µ wedge)
• playback of all these tracks without audible disturbanceplaying time for: 1000µ wedge ≥10seconds
Fingerprint ≥10secondsBlack dot from 01:05 to 01:25
• jump forward/backward (search) within a reasonable time
2CUSTOMER INFORMATION
It is proposed to add an addendum sheet to the set whichinforms the customer that the set has been checkedcarefully - but no fault was found.The problem was obviously caused by a scratched, dirty orcopy-protected CD. In case problems remain, the customeris requested to contact the workshop directly. The lens cleaning (method 3) should be mentioned in theaddendum sheet.
The final wording in national language as well as the printingis under responsibility of the Regional Service Organizations.
3FAST LENS CLEANING (dry brush)
Use lens cleaning CDSBC AC300 ...........................................9082 100 00043
Insert the lens cleaning CD, press PLAY and follow thevoice guide´s instructions on the CD.
4LIQUID LENS CLEANING
Because the material of the lens is synthetic and coatedwith a special anti-reflectivity layer, cleaning must be donewith a non-aggressive cleaning fluid. It is advised to use“Cleaning Solvent B4-No2”, available with codenumber4822 389 10026.
The actuator is a very precise mechanical component andmay not be damaged in order to guarantee its full function.Clean the lens gently (don’t press too hard) with a soft andclean cotton bud moistened with the special lens cleaner.
The direction of cleaning must be in the way as indicated inthe picture below.
Before touching the lens it is advised to clean thesurface of the lens by blowing clean air over it.This to avoid that little particles make scratches onthe lens.
INSTRUCTIONS ON CD PLAYABILITY
1-6
5EYE-PATTERN SIGNAL – JITTER MEASUREMENT
Measure the signal on the input of the Signal processorusing an analog oscilloscope. Please find the exactmeasuring point in your Service Manual.
See below examples of the signal. Amplitude should read atleast 700mVpp using SBC444A.
good
badIf the oscilloscope shows a signal like the ‘bad’ one, and/orthe amplitude decreases within 1 minute - the CD drive hasto be replaced.
6CD DRIVE – LASER CURRENT MEASUREMENT
The laser current can be measured as a voltage drop on aresistor. The resistor is marked in every Service Manual.The value depends on the type of CD drive.
typical value most probably defectVAMxxxx : 150-230mV ≥350mVMCDxx : 170-230mV ≥300mVDA1x : 210-250mV ≥350mVDA2x : 175-200mV ≥250mVUse SBC444A (CD-DA) for measurement.
7CD DRIVE – OFFSET MEASUREMENT
The photodiodes of the CD-drive may have an offset. Theseoffsets have to be compensated by the signal processor.High offsets can lead to poor playability of some CDs(skipping tracks).
To measure the offset values, start the Service TestProgram - section “Focus Test” without a CD.
The offsets can be measured with a DC Millivoltmeterdirectly on the connector (see drawing below). Pinnumbering varies from drive to drive.
The values from diode A-D should read 0±10mV.Diodes E and F are less critical.
If one of the offsets is higher than ±10mV the CD drive hasto be replaced. Otherwise replace the Signal Processor.
Sanyo DA12T3CD Drive
AA
F
C
B
E
C
D
E
VCC
B
VREF
F
D
9
10
11
12
13
14
15
161800
+5V_HF
VrefCD10
A
D
E
B
C
FGND 8
E
D
A
B
C
F
Laser power control
100n
2878
470n
2876
3821 1R
1K
3823
2880
33p
+5V
BC807-407879
3817
47R
3820
4R7
47R
3819
1n2879
2877
47u
1
8
4
7811-ALM358D
3
2
10K
3822
47R
3818
2841
100n
47n
2869
+5V_HF
LASER DIODE
U >250mV->Laser damaged !
4,6V
3V3,3V
3,9V
2V
0,17V
0,17V
SanyoDA12T3
HF-Amplifier
D3
D2
D1
Drive detection
680R
3905
3903
3K3
BC847B7877
47n
2818
1K5
3902
5
7
4
2
1
6
3
64
8
9
10
11
470R
3893
+3.3V
2K2
3908
10K
3923BC847B7878
BC847B7876
4n7
2813
3896
100R
220u
2885
2881
560p
47n
2887
560R
3901
2883
470n
2817
4u7
3n3
2814
3898
220R
3895
27K
470n
2884
+3.3V
3909
820R
3907
100R
3920
33K
3897
2882
82p
3K3
3904
2K7
38993906
470R
+5V_HF
HFIN
VrefCD10
100p
2815
2816
22n
LDONto 3826,3827
VREF GE
VDDA1
VRIN
VSSA1
ISLICE
LDON
D1
D2
D3
D4
HFIN
HFREF
IREF
CD_DA: 0V / CD_RW: 3V
Σ (A-D)
800mVpp
TB = 0.5µs/div
EYE-PATTERN
1,8V
1,2V
2,4V
2,6V0,65V
INSTRUCTIONS ON CD PLAYABILITY
1-7
2-1 2-1
SET BLOCK DIAGRAM
SET WIRING DIAGRAM
3-1 3-1
4-1 4-1
PCB LAYOUT - CASSETTE BOARD
4-2 4-2
CIRCUIT DIAGRAM - CASSETTE BOARD
5-1 5-1
PCB LAYOUT - MAIN(MCU) & USB BOARD
5-2 5-2
CIRCUIT DIAGRAM - MAIN(MCU) BOARD - TUNER PART
5-3 5-3
CIRCUIT DIAGRAM - MAIN(MCU) & USB BOARD
6-1 6-1
PCB LAYOUT - CD BOARD
6-2 6-2
CIRCUIT DIAGRAM - CD BOARD
7-1A 7-1A
PCB LAYOUT - AMP BOARD FOR VERSION /55/77/79
PCB LAYOUT - AMP BOARD FOR VERSION /12/05TOP VIEW
7-1B-1 7-1B-1
PCB LAYOUT - AMP BOARD FOR VERSION /12/05BOTTOM VIEW
7-1B-2 7-1B-2
7-2A 7-2A
CIRCUIT DIAGRAM - AMP BOARD FOR VERSION /55/77/79/98
CIRCUIT DIAGRAM - AMP BOARD FOR VERSION /12/05
7 - 2B 7 - 2B
53
5543
56
5251
45
4948
44
4341
38
4240
2829
27
2625
23
22
24
212019
18171615
1412
13
11
910
876
5
4
321
3231
30
3433
3938
3536
37
4547
50
54
46
SET MECHANICAL EXPLODED VIEW
8-1 8-1
MECHANICAL & ACCESSORIES PARTS LIST
1 996510002247 CASS KEY DOOR 56 996510002240 TOP COVER1 996510004643 CASS KEY DOOR /77/79/98 A 994000004736 SLIDE SWITCH (SSV-12-8700S)2 996510002263 CASSETTE KEYS DOOR FOOT B 996500038819 CD MECHANISM SANYO DA11VF3 996510002265 CASS KEYS DOOR SPRING C 996510002243 REMOTE RECEIVER LENS4 996510002246 CASS DOOR D 996510004639 FWM185 SPEAKER 8R 30W RIGHT
4 996510004642 CASS DOOR /77/79/98 E 996510006807 SPEAKER (8R 30W) -L /985 996510002255 TUNING KNOB F 996510004640 SPEAKER BOX ASS'Y 8R 30W -L6 996510002254 VOLUME KNOB CHROME G 996510002238 SPEAKER BOX ASS'Y 8R 30W7 996510002248 VOLUME RING SPRAY SIL H ! 996510004702 APP AC CORD SET W/K-1004 /778 996510002244 FRONT LENS I ! 996510002304 AC CORD 1650mm /12/55/98
10 996510002245 CD DOOR J ! 996510002409 BS APP AC CORD SET /0510 996510004641 FWM185 CD DOOR /77/79/98 K ! 996510004651 SAA APP AC CORD L1700mm /7913 996510002258 OPEN/CLOSE KNOB L 996510002306 REMOTE HANDSET14 996510002257 STANDBY KNOB M 996510006810 AM LOOP ANTENNA14 996510004644 STANDBY KNOB /77/79/98
27 996500038820 CD LOADER WXD-8210 (COMPLETED)28 996510002242 LOOP ANT COVER30 996510002266 CASSETTE DOOR SPRING31 996510002239 FRONT CAB32 996510002267 CASS BRACKET
39 994000004727 GEAR STAND (MODE:0.8)40 996510002269 CASSETTE BOARD41 996510002305 BASE CABINET42 996510002268 SCREEN COVER Note: Only these parts mentioned in the list are48 ! 996510002303 TRANSFORM VDE-STD 230V /05/12 normal service parts.
Note: Only these parts mentioned in the list are normal service parts.
8-4
9-1
REVISION LIST
1.0 Manual 3141 785 31680Initial Service Manual released.
1.1 Manual 3141 785 31681In this version, 1) the instruction of CD playability check is added.2) Chapter 7 have been revised ---- add Schematics and PCB Layouts for version /05/12.3) Version /77 & /79 have been added. Chapter 8 Mechanical Parts List updated.
1.1 Manual 3141 785 31682In this version, 1) Version /98 has been added. Chapter 8-2 Mechanical & Accessories Parts List updated.
