Philips MX3900D Service Manual page 49

VOLUME CONTROL SURR., CENTER & SW AND CONTROL MULTIPLEXER CIRCUIT
1234 D11 2302 B8 2305 B8 2310 D6 2313 B3 2319 B2 2322 D2
2128 C8 2303 C8 2308 C8 2311 B3 2314 C4 2320 C2 2324 F10
2135 A6 2304 B8 2309 A6 2312 B3 2318 E8 2321 C2 2325 F8
1 2 3
3312
A
1K
# 4341
+9V4
GND_S
DVD_SUR
GND_S
3313
B
1K
2319
DVD_SL 3318 3314
6K8 1K
470n
GND_S
DVD_SUR
2320
DVD_SR 3320 3315
6K8 1K
470n
C
DVD_SUR
2321 3316
LINE_L
470n 1K
2322
3317
LINE_R 1K
470n
D
# 4342
DVD_CS
GND_C
3337
1K
+9V4
E
GND_C
1K
3338
DVD_C 2341
3340
F
6K8 1K
1u
3339
DVD_CS
DVD_SUB
3343 2342 3342 GND_C
6K8 1u 1K
DVD_CS
G
2343
3334
LINE_L 1K
1u
3335
2344
LINE_R
1u 1K
H
1 2 3
9-6
2326 F8 2329 G8 2332 G7 2336 E3 2339 F3 2342 F2 2349 A14
2327 F8 2330 G8 2333 G6 2337 E3 2340 C8 2343 G2 2352 C8
2328 F8 2331 E6 2335 H6 2338 E3 2341 F2 2344 G2 2353 G8
4 5 6
GND_S rename to 3310
on pt .4 board
2135
7330
TDA7468
7 8 9 10
27
VOLUME I TREBLE BASS
1
POWER SUR.
SUPPLY
LEFT LEFT LEFT
28
3
4
SOURCE
5
SELECTOR
LOGIC
6
2314
2
1n 23
24
VOLUME I
TREBLE BASS
25
SUR.
RIGHT RIGHT RIGHT
26
22 21 20 19
3311
GND_S
GND_C
3333
7304
TDA7468
7 8 9 10
27
VOLUME I TREBLE BASS
1
POWER SUR.
SUPPLY
LEFT LEFT LEFT
28
3
4
SOURCE
5
SELECTOR
LOGIC
6
2339
2
1n 23
24
VOLUME I TREBLE BASS
25
SUR.
RIGHT RIGHT RIGHT
26
22 21 20 19
rename to 2334
on pt .4 board
GND_C
4 5 6
2380 G8 3303 G8 3306 B8 3311 D6 3314 B3 3317 D3 3320 C1
3135 H7 3304 B8 3307 C8 3312 A3 3315 C3 3318 B1 3321 C2
3136 H6 3305 B8 3308 C8 3313 B3 3316 C3 3319 B2 3322 E8
7 8 9
VOL_Ls
1K
11
VOLUME II
3305 2302
12
LEFT 68R 470n
2304
16
BASS ALC
GND_S
470n
3306
14
IIC BUS
1K I2C_CLK2
15
3307
REC 13
I2C_DATA
1K
100n
GND_S
GND_D 2303
VOLUME II
3336 2352
17
RIGHT 68R
470n
18
VOL_Rs
GND_S
1K
VOL_C
1K
11
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
1K I2C_CLK3
15
3328
REC 13
1K I2C_DATA
100n
GND_D GND_C
2353
VOLUME II 2329
3303
17
RIGHT 2K2 470n
18
VOL_Sub
GND_C Added at Prod start (rework on pt .3 copper side)
3136 330n
7 8 9
9-6
3324 F10 3327 F8 3333 E6 3336 C8 3339 F3 3343 F1 3349 H6
3325 F10 3328 F8 3334 G3 3337 E3 3340 F1 3344 G2 3355 B12
3326 F9 3329 F8 3335 G3 3338 F3 3342 F3 3347 F2 3356 A13
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
AMP_LS 2 Y6
10
GND_S
9
AMP_RS 4 Y7
GND_D
8
AMP_ON_S
3 Z
7
AMP_SUB
MUX_DET
6
GND_C
5
AMP_ON_LRCS
4
3
FREQ_HOP
2
NTC 7352 : TRUTH_TABLE
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
3357 C12 3369 B14 4342 D1 7304 E4
3359 B11 3370 B14 7301 E9 7330 A4
3368 A14 4341 A1 7302 F10 7352 A13
13 14
+5V
2349
7352
100n
74HC4051D
16
GND_D
A
VDD
3368
A0 11
A0
100R
A1 10 3369
A1
B
100R
LOGIC
1-of-8
LEVEL
DECODER
CONVERSION
3370
A2 9
A2
100R
C
E_ 6
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
LOW LOW DI_LOCK
LOW HIGH NTC
E
HIGH LOW GND
HIGH HIGH GND
F
G
H
AV circuit 3139 118 35003 sheet 3 dd wk304
13 14