Philips MCW770 Service Manual page 58

1 2
COMBI BOARD
2
AUDIO FREQUENCY & LOGIC
HEADPHONE AMPLIFIER
A
2403
1
VOL_LEFT
1u0 50V
+12V_A
B
V_MID
5.2V
3
GND_A GND_A
2408
1
VOL_RIGHT
1u0 50V
C
2413
Only for Subwoofwer out
100n
1004
GND_A
1 2412
F404 SUB_W
3418
2
470R 22u
D
7403
3
BC817-25W
YKC21-3416
GND_A
GND_A GND_A
7404
BC817-25W
GND_A
E
1014
GND_A
HP_DET
4
F406
HP_RIGHT
3
GND_A GND_A
2
HP_LEFT
7407 0.8/0V
1
F407
BC817-25W
BC817-25W
FE-BT-VK-N
MUTE
F
GND_A
F408
GND_A GND_A
V
EVM
...V DC voltages
measured in CD mode mute/not muted
1 2
11-6
3 4 5
3400
27K
2400
100p
7400-2
NJM4556AM
GND_A
4
5,8V
7 5,8V
6
5
3401
3
5,8V
8
470R
+12V_A
GND_A
F401
GND_A
10,9V
7400-1
NJM4556AM
3413
GND_A
5,8V 8
F403
470R
5,8V
3 1
2
5,8V
4
GND_A
2411
3402
100p
3415
3K3
27K
3K3
50V 3410
3
3420
F405
AMP_MUTE
2K2
+5V
7405
BC857BW
4.8V
-0,2V AMP_RIGHT
3421
AMP_LEFT
2K2 4.6V
3423
MUTE_SW
10K
HP_DET
3425 3426 F415
33R 33R 3429 3430
33R 33R
0.8/0V
7408
7410
BC857BW GND_D
4.8V
+5V
4.4V
4.8/0V
+5V_CD
GND_A
1
4.1/4,7V 3439
MUTE_HP
10K
3 4 5
6 7 8
FAN CONTROL
F402
Fan runs permanently.
Higher volume increases the speed.
5
F409 3411
FAN_CONT
4K7
not used
1400
1
GND_A
2
+12V_A +12V_A
3
LOW_PWR_CTRL LOW_PWR_CTRL
4
+12V_M +12_M
5
+D +D
6
GND_D
1 7
+D2 +D2
8
+5V6 +5V6
9
GND_D
10
+5V_VCD
+5V_VCD
11
VCD_ON VCD_ON
B11B-EH-A
GND_SHIELD
VCD_ON
4
F414
F413
AMP_OFF
3431
F411 F412
+5V_VCD 0V
1K0 F417
0.7V 3434
7409
BC817-25W
2K2
4.9V
GND_D
+5V6
3440
9269
GND_D
5,5V 7411 5,6V
1R0
GND_D
BC807-25W
1 3
6 7 8
11-6
9
1004 D1 7409 F7
7410 F4
1014 E1
1400 C8 7411 F6
1401 C9 9269 F7
2400 A4
9499 F6
2401 A4 F401 B3
2402 D6 F402 A6
2403 A2 F403 C5
2404 B4 F404 D1
2405 B5 F405 D4
2406 B2 F406 E1
2407 C4 F407 F1
A
2408 C2 F408 F3
+12V_M
2409 C4 F409 B8
3
2410 D5 F410 C9
2411 C4 F411 E6
2412 D3 F412 E8
2413 C1 F413 E8
2414 D2 F414 E6
2415 C9 F415 E5
2416 B8 F416 F8
2417 E4 F417 E8
2418 F1 F418 E9
11,5V
2419 F1 F419 E9
B
2420 F4 F420 E9
7402
2421 E9
BC337-40
8,7V
3400 A4
8,2V
3401 A3
3402 D3
3403 B3
1401
F410 3404 B3
1
+
3405 B3
2
-
3406 B5
B2B-EH-A 3407 B3
GND_SHIELD 3408 B3
C 3409 C3
3410 D3
3411 B8
3412 A9
3413 C3
3415 D4
3418 D2
3419 D1
3420 D3
3421 E3
+5V 3422 E4
2 3
4,8V 3423 E5
D
3424 E1
3425 E3
6401
3426 E4
3427 F5
1N4148
3428 F5
3429 E4
3430 E4
F418 2421 3431 E7
3432 F2
7406
100n
3433 F3
M62320FP
13
3434 F8
VDD 3435 D9
Φ E
0V
1
3436 F4
SO F420 4,8V
2
4,3V
4 8-BIT I/O
0 SCL I2C_CLK 3437 F6
5 EXPANDER
1
F419 3438 F7
0/4,9V 3
6
2 SDA I2C_DATA
0/ 4,7V 3439 F4
7
4,4V
3
1
0V D 16 3440 F6
9
4 0
4,4V 15
10
6401 D9
5 CS 1
4,4V 14
11
6 2 6403 B8
12
7
6404 B5
3,9V
7400-1 C4
GND GND_D
7400-2 A4
8
7402 B9
GND_D
F 7403 D3
7404 E2
7405 D4
7406 E9
7407 F2
5
7408 F3
Combi board P2003 150W class D, 03.12.03
9