Philips MC-M570/21 Service Manual page 50

1004 E1 2400 B3 2408 D1
2404 C3 2412 E4 2416 D8
1014 G1 2401 C3 2405 C4 2409 D3 2413 E1 2417 F4
1400 D13 2402 B5 2406 D1 2410 D5 2414 F2 2418 H2
1401 E9 2403 C1 2407 D3 2411 E3 2415 E8 2419 H2
1 2
2
COMBI BOARD
A F & L P
UDIO REQUENCY OGIC ART
A
HEADPHONE AMPLIFIER
B
3401
2403
1 VOL_LEFT
470R
1u
+12V_A
C
V_MID
5.2V
3
GND_A
D
3413
2408
1 VOL_RIGHT
470R
1u
provisional
2413
E
100n
1
1004
3418
SUB_W
2
470R
3
YKC21-3416
7403
BC817-25
F 7404
BC817-25
MUTE
1014
HP_DET
HP_DET
4
HP_RIGHT
3
G
GND_A
2
HP_LEFT BC817-25 0.8V
1
7407
FE-BT-VK-N
H
A
1
1 2
11-9
3415 E3
2420 H5 3402 C5 3406 C4 3410 D5 3421 F3
2421 H14 3403 C2 3407 D2 3411 D7 3418 E2 3422 F4
3400 B3 3404 C2 3408 D2 3412 D8 3419 F2 3423 F5
3401 C3 3405 C2 3409 D2 3413 D3 3420 F3 3424 G2
3 4 5 6
3400
27K
2400
100p
6
2402
5.2V
AMP_LEFT
7
5 100u
7400-B
8
NJM4556AM
3406
6405
11.5V
+12V_A
3
10R BAS316
7400-A
3
NJM4556AM
2410
1 AMP_RIGHT
100u
2 5.2V
4
GND_A
2411
100p
3415 27K
2K2
AMP_MUTE 3
3420
7405
BC857BW
4.8V
+5V
2K2
3421
3423
4.6V MUTE_SW
10K
39R 39R
3425 3426 39R 39R
3429 3430
0.8V
BC817-25
7408
MUTE 7410
BC857BW +5V
4.8V
4.8V
3439
4.1V MUTE_HP
4.1V = MUTE 10K
4.8V = ACTIVE
3 4 5 6
3433 G4 3437 H8
3425 G4 3429 G5 6400 D8 7400-B C3
3426 G4 3430 G5 3434 G10 3438 H10 6401 G14 7402 D8
3427 G11 3431 G9 3435 H14 3439 H5 6402 H8 7403 F3
3428 G11 3432 G3 3436 H5 3440 H7 7400-A D3 7404 F2
7 8 9
FAN CONTROL
Fan runs permanently.
2
Higher volume increases the speed.
+12V_M
11.5V
FAN_CONT 4K7
8.2V..11V 7402
5
BC337-40
3411
7.5V..10.3V
1401
1
+
FAN
2
-
EH-B
BC807-25W(COL)
1N4148
2R2
4.4V
7411
4.7V
+5V6
+5V_CD 3440 6402
for 3DTC versions only
for 5DTC versions a wire bridge is stuffed instead of 6402
5K6
0V
3.9V
3431
7409
BC817-25W(COL)
7 8 9
11-9
7405 F4 7409 G9 9268 G8
7406 F12 7410 G4
7407 G2 7411 H8
7408 G3 8302 E12
10 11 12
7406
M62320FP
AMP_OFF
4 AMP_OFF
D0
MUTE_SW
D1
HP_DET
D2
MUTE_HP
D3
D4
3 OZ_SW
D5
5 AMP_RELAIS
D6
D7
3434
0.7V
2K2
10 11 12
13 14
A
B
C
D
E
PORT EXPANDER
F
1
14
+5V +5V6
CS2
15
G
CS1 +5V6
+5V
16 1N4148
CS0
6401
8 13 3 2
4.1V
H
GND_D
Power2003 100W Class D Combi-Audio Frequency Part 2003 02 10
13 14