Philips FWM143 Building instructions

3141 785 31993
Service AIDS & CD playability ......................................1
Specifications ................................................................2
Connection & Controls ...................................................3
Disassembly Instructions ...............................................4
Block & Wiring diagrams ................................................5
RADIO BOARD ..............................................................6
AMP & POWER BOARD ...............................................7
MCU BOARD ..................................................................8
EXPLODE DIAGRAM ....................................................11
SERVICE PARTLIST .....................................................12
CASS BOARD ................................................................9
CD BOARD ...................................................................10
VERSION LIST ..............................................................13
3

1-1
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
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
SERVICE AIDS
GB WARNING
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.
ESD
CLASS 1
LASER PRODUCT
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 !.
Lead free

Set remains closed!
Standard repair procedure
N
Y
Play a CD
for at least 10 minutes
Y
playability
ok ?
N
playability
ok ?
add Info for customer
"SET OK"
playability
ok ?
Y
N
check playability
N
Y
playability
ok ?
check playability
check playability
EYE-Pattern
ok ?
N
Y
check "EYE-Pattern"
replace CD Drive
Laser current
ok ?
N
Y
check Laser current
CD Drive offsets
ok ?
N
Y
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 4is recommended
1- 7For description - see following pages
CD PLAYABILITY CHECK
1-2

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 t10seconds
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 t10seconds
Fingerprint t10seconds
Black dot from 01:05 to 01:25
• jump forward/backward (search) within a reasonable time
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.
3
FAST LENS CLEANING (dry brush)
Use lens cleaning CD
SBC AC300 ...........................................9082 100 00043
Insert the lens cleaning CD, press PLAY and follow the
voice guide´s instructions on the CD.
4
LIQUID LENS CLEANING
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 B4-No2”, available with codenumber
4822 389 10026.
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.
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.
CD PLAYABILITY CHECK
1-3

5
EYE-PATTERN SIGNAL – JITTER MEASUREMENT
Measure the signal on the input of the Signal processor
using an analog oscilloscope. Please find the exact
measuring point in your Service Manual.
See below examples of the signal. Amplitude should read at
least 700mVpp using SBC444A.
good
bad
If the oscilloscope shows a signal like the ‘bad’ one, and/or
the amplitude decreases within 1 minute - the CD drive has
to be replaced.
6
CD DRIVE – LASER CURRENT MEASUREMENT
The laser current can be measured as a voltage drop on a
resistor. The resistor is marked in every Service Manual.
The value depends on the type of CD drive.
typical value most probably defect
VAMxxxx : 150-230mV t350mV
MCDxx : 170-230mV t300mV
DA1x : 210-250mV t350mV
DA2x : 175-200mV t250mV
Use SBC444A (CD-DA) for measurement.
7
CD DRIVE – OFFSET MEASUREMENT
The photodiodes of the CD-drive may have an offset. These
offsets 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 Test
Program - section “Focus Test” without a CD.
The offsets can be measured with a DC Millivoltmeter
directly on the connector (see drawing below). Pin
numbering 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 has
to be replaced. Otherwise replace the Signal Processor.
Sanyo DA12T3
CD Drive
A
A
F
C
B
E
C
D
E
VCC
B
VREF
F
D
9
10
11
12
13
14
15
16
1800
+5V_HF
VrefCD10
A
D
E
B
C
F
GND 8
E
D
A
B
C
F
Laser power control
100n
2878
470n
2876
3821
1R
1K
3823
2880
33p
+5V
BC807-40
7879
3817
47R
3820
4R7
47R
3819
1n
2879
2877
47u
1
8
4
7811-A
LM358D 3
2
10K
3822
47R
3818
2841
100n
47n
2869
+5V_HF
LASER DIODE
U >250mV
->Laser damaged !
4,6V
3V
3,3V
3,9V
2V
0,17V
0,17V
Sanyo
DA12T3
HF-Amplifier
D3
D2
D1
Drive detection
680R
3905
3903
3K3
BC847B
7877
47n
2818
1K5
3902
5
7
4
2
1
6
3
64
8
9
10
11
470R
3893
+3.3V
2K2
3908
10K
3923
BC847B
7878
BC847B
7876
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
3899
3906
470R
+5V_HF
HFIN
VrefCD10
100p
28152816
22n
LDON
to 3826,3827
VREF GE
VDDA1
VRIN
VSSA1
ISLICE
LDON
D1
D2
D3
D4
HFIN
HFREF
IREF
CD_DA: 0V / CD_RW: 3V
6(A-D)
800mVpp
TB = 0.5Ps/div
EYE-PATTERN
1,8V
1,2V
2,4V
2,6V
0,65V
CD PLAYABILITY CHECK
1-4

2 - 1
AMPLIFIER
Output power ....................................... 2 x 20 W RMS
.......................................................................... 800W PMPO
Signal-to-noise ratio .......................... *62 dBA (IEC)
Frequency response ......... 63 – 16000 Hz, ± 3 dB
Impedance loudspeakers ......................................... 8 1
Impedance headphones ................. 32 1– 1000 1
CD PLAYER
Frequency range .................................. 63 – 16000 Hz
Signal-to-noise ratio ............................................ 65 dBA
TUNER
FM wave range ................................... 87.5 – 108 MHz
MW wave range ............................... 522 – 1710 KHz
TAPE DECK
Frequency response
Normal tape (type I) ...... 125 – 8000 Hz (8 dB)
Signal-to-noise ratio
Normal tape (type I) .................................... 35 dBA
Wow and flutter ......................................... )0.4% DIN
SPEAKERS
Bass reflex system
Dimensions (w x h x d) . 190 x 292 x 182 (mm)
GENERAL INFORMATION
AC Power ............................ 110 – 127 / 220 – 240 V
....................................................... 50/60 Hz Switchable
Dimensions (w x h x d) .. 220 x 292 x 285 (mm)
Weight (with/without speakers) ..................................
............................................................... approx. 4.9 / 2.3 kg
Specifications and external appearance are
subject to change without notice.

Rear connections The type plate is located at the back of the system.
APow e r
– Before connecting the AC power cord to the
wall outlet, ensure that all other connections have been made.
– If your system is equipped with aVoltage
Selector, set the VOLTAGE SELECTOR to the local power line voltage. WARNING! – For optimal performance, use only the original power cable. – Never make or change any connections with the power switched on. 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 this happens, let the system cool down before reusing it (not available for all versions).
BSpeakers Connection
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 "-".
●Fully insert the stripped portion of the speaker
wire into the terminal as shown. Notes: – For optimal sound performance, use the supplied speakers. – Do not connect more than one speaker to any one pair of
+
/
-
speaker terminals.
– Do not connect speakers with an impedance lower than the speakers supplied. Please refer to the SPECIFICATIONS section of this manual.
speaker
(right)
speaker
(left)
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 compartment.
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.
Optional connection
The optional equipment and connecting cords
are not supplied. Refer to the operating instructions of the connected equipment for details.
Connecting external equipment
Use a cinch cable to connect AUX IN to the analogue audio out terminals of an external equipment (TV,VCR, Laser Disc player, DVD player or CD Recorder). Note: – If you are connecting equipment with a mono output (a single audio out terminal), connect it to the AUX left terminal. Alternatively, you can use a “single to double” cinch cable (the output sound still remain mono).
AUX IN
L R
L R
AUX IN
3 - 1
CONNECTION AND CONTROLS

3 - 2
CONNECTION AND CONTROLS
Controls
Controls
Controls on the system and remote control
1LCD Display
– shows the status of the system.
2iR SENSOR
– infrared sensor for remote control.
3PROGRAM (PROG)
for CD ................. programs tracks and reviews the
program.
4STANDBY-ON y(POWER y)
– switches the system to standby/on.
52;
for CD/MP3 ..... starts or pauses CD playback.
6TITILE-/+ ¡1 /2™
for CD/MP3 ..... skips to the beginning of a
current track/previous/ next track (title). (press and hold) fast searches back and forward within a track/ disc.
for clock/timer .. adjusts the hours and minutes
for clock / timer functions.
7Source selector (CD/TAPE/TUNER/AUX)
– selects the respective sound source for CD/
TAPE/ TUNER/AUX.
8CLOCK/TIMER
– sets the clock or timer function.
9Mode selector (MW/FM/AUX)
for Tuner ............. selects waveband: MW or FM. for AUX .............. selects the AUX mode.
0OPEN/CLOSE
– open/close the CD door.
!STOP 9
for CD/MP3 ..... stops CD playback or erases a
CD program.
@TUNING
– tunes to a radio station.
#DISPLAY
– display the current time.
$DBB (Dynamic Bass Boost)
– enhances the bass.
%VOLUME 3/4
– adjusts the volume level.
^n
– connect headphones.
&Tape Deck Operation
RECORD 0....... starts recording. PLAY 2................. starts playback. REW à/F.FWD á
......................................
fast rewinds/forwards the tape
.
STOP•OPEN 9/
...................................... stops the tape; opens the tape
compartment.
PAUSEÅ............ pauses recording or playback.
*REPEAT
for CD/MP3 ..... repeats a track/CD programme/
entire CD.
(SHUFFLE
for CD/MP3 ..... plays CD tracks in random order.
)SLEEP
– activates/deactivates or selects the sleeper time.
¡MUTE
– switches playback sound off and on.
™TIMER ON/OFF
– activates/deactivates the timer.
£DSC (Digital Sound Control)
– selects sound characteristics: CLASSIC/JAZZ/
POP/ROCK.
≤í/ë
for CD/MP3 ..... skips to the beginning of a
current track/previous/next track (title).
for CD/MP3 ..... (press and hold) fast searches
back and forward within a track/ CD.
for clock/timer adjusts the hours and minutes for clock/timer functions.
∞ALBUM-/+ 5 /6
for MP3 ............... selects an album.
§ALBUM+
for MP3 ............... selects an album upward.
2 & ( ™ ) ¡ % 5 #
4 3 8 $ ! £
4 1 2 % ^ 3 9 $
0 @ 5 6 ! § 8 7 &

4 - 1 4 - 1
DISASSEMBLY DIADRAMS
A. Remove CD Door
A
a.Power on the unit and open the CD door.
b.Remove the CD door cover.
A
B1
B2
B3
B. Remove Top Cabinet
B1: Remove screws MP 3x12 - 6 pcs.
B2: Remove screws MP 3x12 - 4 pcs.
B3: Remove screws MP 3x12 - 4 pcs.
C. Remove CD Loader
C1: Remove screws SP 3x8 - 2 pcs.
C2: Remove screws SP 3x15 - 2 pcs.
C3: Remove screws SP 3x10 - 1 pcs.
C1
C2
C3
C2
C3

5 - 2
5 - 2
SET BLOCK DIAGRAM

5 - 3 5 - 3
SET WIRING DIAGRAM

6 - 1 6 - 1
CIRCUIT DIAGRAM - RADIO BOARD

6 - 2
6 - 2
LAYOUT DIAGRAM - RADIO BOARD

7 - 1 7 - 1
CIRCUIT DIAGRAM - AMP & POWER BOARD

7 - 2
7 - 2
LAYOUT DIAGRAM - AMP & POWER BOARD

8 - 1 8 - 1
CIRCUIT DIAGRAM - MCU BOARD

8 - 2
8 - 2
LAYOUT DIAGRAM - MCU BOARD - TOP

8 - 3
8 - 3
LAYOUT DIAGRAM - MCU BOARD - BOTTOM

9 - 1 9 - 1
CIRCUIT DIAGRAM - CASSETTE BOARD

9 - 1
9 - 1
LAYOUT DIAGRAM - CASSETTE BOARD