Philips MX3900D Service Manual page 87

VOLUME CONTROL SURR., CENTER & SW AND CONTROL MULTIPLEXER CIRCUIT (For pcb layout ... 35006)
1234 E11 2303 C8 2309 A6 2313 B3 2319 B2 2324 F10 2328 G7
2128 C8 2304 B7 2310 D6 2314 C3 2320 C2 2325 F8 2329 G9
2301 B8 2305 B8 2311 B3 2317 E8 2321 C2 2326 F8 2330 G9
2302 B8 2308 D8 2312 B3 2318 F8 2322 D2 2327 G8 2331 E6
1 2 3
A
3312
1K
# 4341
+9V4
GND_S DVD_SUR
B
GND_S
3313
1K
DVD_SL 3318 2319 3314
6K8 470n 1K
GND_S
2314
2320
DVD_SR 3320 3315
DVD_SUR
1n
C
6K8 1K
470n
2321 3316
DVD_SUR
LINE_L
470n 1K
2322 3317
LINE_R
470n 1K
D
# 4342
GND_S GND_S GND_S GND_S
DVD_CS
GND_C
3337
1K
E
+9V4
+4V7_Ref
GND_C
3338 1K
F
2341
DVD_C 3340
22K 1K
1u
3339
2339
DVD_CS
DVD_SUB 2342 GND_C
3343 3342
1n
6K8 1K
1u
3341
G
+4V7_Ref
47K
DVD_CS
2343 3334
LINE_L 1K
1u
2344 3335
LINE_R 1K
1u
H
GND_C GND_C GND_C
1 2 3
9-6a
2332 H7 2336 F3 2340 C8 2344 H2 2353 G8 2390 D3 2394 H3
2333 H6 2337 F3 2341 F2 2349 A14 2380 G8 2391 D3 2395 H3
2334 H6 2338 F3 2342 G2 2351 C8 2381 G8 2392 D3 2396 H3
2335 H6 2339 G3 2343 G2 2352 C8 2382 D11 2393 D3 2397 H3
4 5 6
GND_S
3310
7330
TDA7468
1K
7 8 9 10 11
27
VOLUME I TREBLE BASS
1
POWER SUR.
SUPPLY
LEFT LEFT LEFT
28
3
4
SOURCE
5
SELECTOR
LOGIC
6
2
23
24
VOLUME I TREBLE BASS
25
SUR.
RIGHT RIGHT RIGHT
26
22 21 20 19 18
3311
1K
GND_S
LINE_C
GND_C
3333
7304
1K
TDA7468
7 8 9 10 11
27
VOLUME I TREBLE BASS
1
POWER SUR.
SUPPLY
LEFT LEFT LEFT
28
3
4
SOURCE
5
SELECTOR
LOGIC
6
2
23
24
VOLUME I
TREBLE BASS
25
SUR.
RIGHT RIGHT RIGHT
26
22 21 20 19 18
2334
GND_C
GND_C
4 5 6
3135 H7 3305 B8 3310 A6 3314 B3 3318 B1 3322 F8 3327 F8
3302 G9 3306 C8 3311 D6 3315 C3 3319 C1 3324 F10 3328 F8
3303 G8 3307 C8 3312 A3 3316 C3 3320 C1 3325 F10 3329 F8
3304 B8 3308 D8 3313 B3 3317 D3 3321 C1 3326 F9 3330 G8
7 8 9
VOL_Ls
2301
VOLUME II
3305
12 470n
LEFT 68R 470n
2302
2304
16
BASS ALC
GND_S
470n
3306
14
IIC BUS
1K I2C_CLK2
15
3307
REC
13
I2C_DATA
1K
100n
GND_D
2303 GND_S
VOLUME II
3336 2352
17
470n
RIGHT 68R
2351
470n
VOL_Rs GND_S
VOL_C
2317
470n
VOLUME II
3322 2318 AMP_C
12
7301
LEFT 68R
470n
3326
1K
470n
BC847B
16
BASS ALC
2326
GND_C
3329
14
IIC BUS I2C_CLK3
1K
15
3328
REC 13
1K I2C_DATA
100n
GND_D
GND_C
2353
VOLUME II 2329
3303 3330
17
RIGHT 1K2 1K2 470n
4330
GND_C
330n
VOL_Sub
7 8 9
9-6a
3333 E6 3337 E3 3341 G3 3347 F1 3357 C12 3370 C14 4382 D11 T335 C11
3334 G3 3338 F3 3342 G3 3349 H6 3359 B11 4330 G8 7301 F9 T336 C11
3335 H3 3339 F3 3343 G1 3355 C12 3368 B14 4341 A1 7302 F10 T337 C11
3336 C8 3340 F1 3344 G1 3356 A13 3369 B14 4342 D1 T334 C11 T338 D11
10 11 12
13 Y0
Pscan_DET
14 Y1
S_Video_DET
+5V
15 Y2
HP_DET
12 Y3
MIC_DET
+5V
1 Y4
DI_LOCK
3355
680R
5 Y5
NTC
T334
2
AMP_LS Y6
10
T335
GND_S
9
T336
4
AMP_RS Y7
GND_D
8
T337
AMP_ON_S
3 Z
7
T338
AMP_SUB
MUX_DET
6
2382
T339
GND_C
4382
5
470n
AMP_ON_C
4
3
T341
FREQ_HOP
2
7352 : TRUTH_TABLE
NTC
1
A2
FE-BT-VK-N
1234
LOW
LOW
LOW
LOW
HIGH
HIGH
HIGH
HIGH
+5V_MUTE_1
3324 MUTE_C
1K
GND_D
10 11 12
T339 D11
T341 D11
13 14
+5V
2349
A
7352
100n
74HC4051D
16
GND_D
VDD
A0 11 3368
A0
100R
B
3369
A1 10
A1
100R
LOGIC
1-of-8
LEVEL
DECODER
CONVERSION
3370
A2 9
A2
100R
C
6
E_
GND_D
VEE VSS
7 8
GND_D GND_D
D
A1 A0 MUX_DET
LOW LOW Pscan_DET
LOW HIGH S_Video_DET
HIGH LOW HP_DET
HIGH HIGH MIC_DET
E
LOW LOW DI_LOCK
LOW HIGH NTC
HIGH LOW GND
HIGH HIGH GND
F
G
H
3139 113 35006_04 dd wk0405
13 14