Philips FWM996 Service Manual page 28

CIRCUIT DIAGRAM - SUB AMP BOARD
(in subwoofer box)
Q31
+ 22-27V
R31 R37
BC847C
270R 270R
R33 R34
1K 1K
C31 C32
470UF35V 470UF35V
ZD31 ZD33
18V 12V
GND
ZD32 ZD34
C33 C34
18V 18V
470UF35V 470UF35V
C6
R35 R36
22UF50V
1K 1K
- 22-27V
R32 R38
Q33
270R 270R
BC857C
Q1
BUK7535
D5 12V
D6 12V
D7
R10
2.7K
24V
R3
R13
47K
680
C3
R9
22UF/50V
2R11 Q3
2R7
100K
22K BC847C
R15 D4
D3
1N4003
150
C4
1N4003
22UF/50V
R6 C1 C2
D1
22K 22UF/50V R8
22UF/50V 1N4003
22K
D2 C933
1N4003
R4
C911 C915 4700UF/35V
D914 D916
C927
104 104
1N5402 1N5402
47K
104
C912 C916
D915 D917
104 1N5402 1N5402 104
F905
T5AL/250V
CN903
1
F904
2
AC IN 3
T5AL/250V
2
AC27V IN
C0N602
1 FWM996
6 1
5 CN602
AC JACK SW2
4 2
6
3
5
2 3 11
SW2 A 4
1
3
4 10
SW2 CN6/3.96 2
1
5 9
CN6/3.96
SW2 B
5 5
6
4 4
T901
3 3
2 2
F908
T5AL/250V 1 1
CN5/3.96 CN5/3.96
CON601 CN601
CN898
CN689
9
1
8
2
7
3
6
4
5
5
4
6
3
7
2
8
1
8 HEADER
9PIN DIN
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11 - 1
R306 68k
C302 150P
U301A
NJM4558
R302
R301 2
C305
-
R307
Q34 1
6.8k
1k
8050 +12V 3
+
10UF/25V
-12V
C399
R610
C44 10UF/25V C301
20K
220UF/25V
C308
104P
104
GND
VOL ALC
C45
220UF/25V
2Q610 2D612
2R632
1N4148
5.6K
-12V
2R611 +
Q32 C611 C612
2.4K
8550
OPEN
100UF/50V
20V+
+ 25-27V
Q2
BUK7535
- 25-27V R210
10K
Z201
D201 1N4148 Q203
R203
4.7K*
5.0V-5.2V
220K
R2 R211
10K
+ R212
D8
2C204 100K
2R205 2R213
24V
33UF/25V
15K 100K
R1
10K R14
22K
680
Q4
BC857C Q5
R12 BC857C
R16 Q212
100K R5
R816
MUTE
150
47K
GND
4.7K
3904
+ C324
22UF/50V
R315
R316
CN689
C303 10P
4.7k
FAN
8
7
U302B
6 NJM4558
5 FP 6
-
4
NC
3 R321 5
+
15k
2
C312
1
823P
8 HEADER
R325
82k
CN603 C376
82k
R303 R391 24k
1 S L Lin
682P
2
3
R392 24k
S R Rin
AC27V OUT
R304 82k +12V
R311 R312
56k 56k
15k 15k
SW IN
U802D U802F
FP
FP
8 9 12 13
IC_74HCT04 IC_74HCT04
SL
GND
SR
POWER ON
FP
AMP MUTE
GND
FAN ON
R328 120k
C317
20V+
+12VA
472P
IC301B
NJM4558
R322 R323
6
-
7
R327 22k
18k 10k 10k
5
+
R308 C314 C315 C316 R305
+12V
474 104 1K
47k 474
C311
104
R329
10K
R611
OPEN
D613
1N4148
R218
+20V
39K
R290
R216
+
C207 power mt
560 560
IC501MUTE
R204 4.7K
330UF/25V
R289
IC501MUTE
R217 560
47K
Q205
VSSP
3904
3904
Q208
C209
Z202
3906 D204 1N4148
224
5.6V
D203 1N4148 C409 C410
C411
Mt 104
104
47UF/63V 47UF/63V
R819
VDDP
R818
1K
FB101
47K
VDDP
100
FB111 100
R817
+ C324 +
R101 C101
4.7UF/50V
47K C107
10K 104
470UF/35V
VDDP
+27V
GND GND
-27V
VSSP
C108
+ 10 1/2W
470UF/35V
R102
FB110 C102
10K
104
100
FB102
VSSP
100
68k
C306
R317
2.7k
0.22UF/25V R318 68k
R319
4.7k C307
C304 10P
R320
7
2.7k
0.22UF/25V R313
U302A
+12V NJM4558 C322
2k
2 100P
-
1
C309
R324 3
104
+
15k
C313
C377
-12V
C805 R803
682P
R326
823P
33 10K
82k
L801 10UH C310
C806
X801
104
700KHZ
R801
100
C804
C807
100UF/16V
+
B+ 100 Q801
220 C880
R807
Z801 104 3904
47K
IC802G
5.6V R812 6.8K
IC_74HCT04
R811 1M
U802B
U802C
U802A 5 6 3 4 11
R802
1 2
10K R808
IC_74HCT04
R804
R805 IC_74HCT04
10K
IC_74HCT04
C801 1K 1K
R809
C802 Q802
102
3906
102
R810
R806 47K
C803
47K X802
47K C808 100
102
600KHZ
11 - 1
R213
+20V
C604 43K
R605 330 1/2W
SW601
100UF/25V
1
C601 2
R601
104
R219
FAN
1K 56R/2W
Q209
Q602
BC857 R221
BC772
R220 1K
R222
470
10K
D207 1N4148
Q207
BC817
C210
+
Z203
100UF/25V
7.5V
VDDA VDDP
VSSA
VSSP
C503
C504
C501 C505
R330
104 104 104
104
5.6K
C320
U502
474
8
VSSP IN+ BOOT1
C512
330 9
IN-
C511
OUT1
11
2C509 2C510 474 SGND1 TDA8920TH TDA8922TH
C513
R501
104
104
2
5.6K
SGND2
OUT2
5
IN2+
VDDP
4
IN2- BOOT2
C961
C518
47UF/50V
2R106
224 68
C508
VDDA C502
10 104 104 104
104
R107
VSSA
C960 VSSA VDDA VSSP VDDP VSSP
47UF/50V
VDDA VDDP
VSSP
VSSA
C403
C405
C401 C404
104
104 104
104
R314 R331
C319 5.6K
2k
OSC
100P
U502
C321
474 8
IN+ BOOT1
C414
C424
R401 C412
330 9
R332 IN-
5.6K 474 OUT1
5.6K
11
SGND1
TDA8920TH
2
SGND2
R402 C413 OUT2
5
IN2+ C425
C318
C415
5.6K
474 153
474 330 4
IN2- BOOT2
C417
C420
U802E
224 68 C406 C407
C402 C408
10 CLK
104 104 104 104
IC_74HCT04
VSSA VDDA VSSP VDDP VSSP
R683
T 47K NTC
Q681
R604
1K
R609
2.4K
R608
Q206
10K
R610
FAN
10K
VDDP VSSP
R503 R504
5.6 5.6
104
15
C521
C525
C526
153
560
SW1
560
153
16
L501
SW1
33uH
1
2L502
2
21
33uH
C524
C527
22
C528
153
C523 560
560
153
R505 R506
5.6 5.6
104
VDDP VSSP
CLK
U801B
U801A
4013
4013
R814 7 14
Gnd Vcc
22
C809
100
C889
104
VDDP VSSP
R404
R405
5.6 5.6
104
15
C418
C423
C427 C428
560
153
560
153 L401
16 S L+
22uH
L402
21 S R+
22uH
C426
C430 C429
C417
22
153
560 560
C520
R406
R407
104
5.6
5.6
VDDP VSSP