Combi Board - Philips MC-120 Service Manual

CIRCUIT DIAGRAM - COMBI BOARD (Part 1)
1550 A1 2501 B9 2510 E9 2518 E11 2526 F13 2534 G14
1551 B2 2502 B10 2511 D10 2519 E12 2527 B13 2535 B8
1552 B2 2503 F14 2512 F10 2520 E12 2528 H13 2550 A2
1553 C2 2505 B8 2513 C10 2521 C12 2529 C14 2551 A2
1554 D2 2506 D8 2514 G10 2522 G12 2530 G14 2552 B2
1555 E2 2507 B9 2515 D11 2523 C12 2531 C13 2553 B1
1556 G2 2508 D9 2516 F11 2524 G12 2532 G13 2554 G4
2509 C9 2517 D11 2525 C13
2500 A8 2533 C14 2555 H3
1 2 3

COMBI BOARD

Source Selection / Sound Control part
2550
A
22n
1550 4
T551 3551
2
39K
T552 3552
1
AUX
39K
3
2553
B
22n
1551
(MC148)
T553
-8V2
-CMOS 1552
7
T556 3556 22K
TAPE_R
6
6
5552 2u2 (MC118)
+5V6_S
+5V6 +12A
9551
5 5 +12V_AF
T554
(MC148)
TAPE_L
4 4 T555
3555 22K
GND
3 3 REC_R
T558
C
REC_R
from
2 2
T557
3585, 3586
REC_L
1
1
REC_L
FE-BT-VK-N FE-BT-VK-N
(MC118)
+CD_MTF_MOTOR
1553
9552
T559
+Motor
9553
2
+12V
GND (MC148)
1
EH-B
D
1554
T561 3557
1
CD_L
33K
2
GND
3558
T562
3
CD_R
33K
4
CD_+5
+5V
T563
5
GND
6
+CD_MTF_MOTOR
+SERVO
E T564
FE-BT-VK-N
1555
T565 3561
1
LEFT
15K T567
2
GND
T566 3562
3
RIGHT
15K T568
4
VCC
5 T569
TU_EN / MPX
F 6 T570
TU_DATA
7 T571
TU_CLK
8 T572
/STEREO
FE-BT-VK-N
1556
+5V6_S
T573
+RDS
16
TU_EN / MPX
15
G
TU_DATA
14
TU_CLK
13
/STEREO
12
T574
STANDBY
BKLT_ON
11
T575
AU_STR
10
T576
AU_DATA
9
T577
AU_CLK
8
H
T578
MUTE
7
T579
PWM to 6500
PWM
6
D_GND
5
T580
+5V6
+5V6
4
T581
/PWRDWN
3
T582
/BKLT
2
+12V
+A
1
I T583
FE-BT-VK-N
PWRDWN
from
Supply Part
1 2 3
10 - 1
2557 G6 2566 D6 3501 B9 3510 E9 3518 E12 3526 H12
2558 I6 2567 B7 3502 B10 3511 C10 3519 E12 3527 B12
2559 I6 2568 D7 3503 B10 3512 G10 3520 E12 3528 H12
2560 I7 2569 B7 3505 C8 3513 D11 3521 E13 3529 C12
2561 G5 2570 D7 3506 E8 3514 F11 3522 E12 3530 G12
2563 B5 2571 G7 3507 C9 3515 D11 3523 D12 3531 C12
2564 D5 2573 A4 3508 E9 3516 E11 3524 F12 3532 G12
2565 B6 3500 A7 3509 C9 3517 D12
3525 B12 3533 C13
4 5 6
SOURCE SELECTOR
+VS
from 7552
+VS
A1 A0
2573
100n 16 9 10
VDD
MSB LSB
LOGIC
7551
HEF4052BP
3577
TAPE_L 1 LL 470R
2565
TUNER_L 5
LH H
100p
HL L
AUX_L 2 3
CD_L 4
HH
TAPE_R 12
LL
TUNER_R 14 LH H
AUX_R 15 13 +VS
HL L
CD_R 11 HH
VSS VEE
8 7 6 3578
470R
T550
2566
100p
Source Selection
Logic Table
Source A1 A0
TAPE 0 0
AUX 1 0
TUNER 0 1
CD 1 1
9554 (forseen only)
5550
to 1551 or 1552
470n
5551
7553
+12V_AF
470n
BC327-40
CD_+5 +5V6
9555 (forseen only)
CD on = Low
3563 T585
+VS
+5V6_S
100R +5V6
MUTE
3568
7550
+12V
BC817-25
1K
T584
BACKLIGHT
10R
3567
4 5 6
3534 G13 3542 I14 3552 A3 3560 E3 3572 G7 3580 D6
3535 C14 3543 B14 3553 B3 3561 E2 3573 H8 3581 C6
3536 G14 3544 H14 3554 B3 3562 F2 3574 F6 3582 E6
3537 A13 3545 C13 3555 C3 3563 G4 3575 C5 3583 B7
3538 I13 3546 G13 3556 B3 3565 I4 3576 C5 3584 D7
3539 B14 3547 B15 3557 D3 3566 I4 3577 B6 3585 C7
3540 H14 3548 H15 3558 D3 3567 I4 3578 D6 3586 E7
3541 B14 3551 A3 3559 E3 3568 H5 3579 B6
3587 B7
7 8 9
ELECTRONIC VOLUME CONTROL
3500 T500
Vc to 7500 pin 14
820R
+VS
7555
BC847B
2569
2567
3587
T595 3K9 T501
2u2 1u
2505 2507
100p 100p
7501 3507 7503
ON4986 ON4986
15R
2509 T503
22p
7556
BC847B
2570
2568
3588
3K9
1u T596
2u2
2506 2508
100p 100p
7502 3508 7504
ON4986 ON4986
15R
2510
T504
REC_R 22p
REC_L
3589 2571
220R
470n
T586
3572
7552
10K
16
HEF4094BP
SRG8
15
EN1
uP Port Extension
1
STB
3
LOGIC TABLE
2 T587
4
Sound features
D 1 JAZZ
T588
5
POP DSC DBB
T589
6
INCR
off
CLASSIC
T590
7
BASS
on
T591 3573
14 CD
off
Rock
T592 1K
13
DBB on
T593
12
A0 off
Jazz
T594
11
on
A1
9
off
Pop
10
on
8
7 8 9
10 - 1
3588 D8 7500-B F11 7504 E9 7512 H13 7556 D6 T503 C9
3589 G7 7500-C F13 7505 D12 7513 B14 9551 C2 T504 E9
5550 E3 7500-D D13 7506 F12 7514 H14 9552 D2 T550 D5
5551 F3 7500-E D11 7507 C12 7550 H4 9553 D2 T551 A2
5552 C2 7500-F D10 7508 G12 7551 B4 9554 E3 T552 A2
6500 B11 7501 C8 7509 C12 7552 G7 9555 F3 T553 B2
6550 I4 7502 E8 7510 G12 7553 F5 T500 A8 T554 C2
7500-A F10 7503 C9 7511 B13 7555 B6 T501 B9 T555 C2
10 11 12
DIGITAL SOUND CONTROL (DSC)
POP JAZZ
PWM
6500
3502 3503
2K2 470R from 1556
1N4148
2521 3529
7507
27K
1n5
BC847B
2513
2523 3531
47p
7509
3511 27K
680p
BC847B
100K
Vc
14
12
2511 3523
13
Vc 33K
220n 7500-E
7
HEF4069UBP
7500-F HEF4069UBP
BC847B
14
HEF4069UBP 2515 3513
11 10 7505
15K
10n
7
2517 3515 3517
33K 100K
1n5
2519
220p
INCR
2520
220p
2518
3516 3518
1n5 33K 100K
Vc
Vc
14
2516
3514 4
3
7506
10n 15K
7500-A 7500-B
7 BC847B
HEF4069UBP
HEF4069UBP
14
2512 3524
1 2
33K
220n
7
BC847B
3512
7510 2524 3532
100K
27K
680p
2514
47p
BC847B
7508 2522 3530
27K
1n5
Control lines
DBB POP BASS JAZZ
0 0 0 0
1 0 1 0
POP JAZZ
1 0 1 0
1 0 0 0
0 0 0 1
1 0 1 1
1 1 1 1
1 1 0 1
10 11 12
T556 B2 T565 E2 T573 G2 T581 I2 T589 H8
T557 C2 T566 F2 T574 G2 T582 I2 T590 H8
T558 C2 T567 E3 T575 H2 T583 I2 T591 H8
T559 D2 T568 F3 T576 H2 T584 H4 T592 I8
T561 D2 T569 F2 T577 H2 T585 G5 T593 I8
T562 D2 T570 F2 T578 H2 T586 G7 T594 I8
T563 E2 T571 F2 T579 H2 T587 H8 T595 B7
T580 H2
T564 E2 T572 F2 T588 H8 T596 D7
13 14 15
A
BASS DBB
BC847B MC118 : 220k
MC148 : 150k
7511
2527
3539
10n 22K
B
BASS_ALC
7513 3547
BC847B
150K
from
Amplifier Part
2529
100n
2531 2533
C
100n 47n
3533 3535
33K 100K
2525
Vc
47p
14
L
9 8
to D
7500-D
7
Amplifier Part
E
Vc
2503
7500-C 22n
HEF4069UBP F
14
R
5 6
to
7 Amplifier Part
2526
47p
3534 3536
33K 100K
2532
2534 G
100n 100n
2530
100n
BASS_ALC
3548
7514
150K
H
from
BC847B
Amplifier Part
BC847B
2528
7512 3540
10n 22K
MC118 : 220k
MC148 : 150k
I
BASS DBB
13 14 15