Grundig M 28-C Servicehandbuch Seite 64

Schaltpläne und Druckplattenabbildungen / Circuit Diagrams and Layout of PCBs
Schaltplan DPL-Platte M 48-DC / Circuit Diagram DPL Board M 48-DC
1 2 3 4 5 6
A
1502
4 +12
+12
+11,5V
2531
7585
100µ
3589
BC548B
+9
B +9,3V
3586
2585 2564
+11,2V 470E +10V
100µ 100µ
2586 6567
100µ BZX79/
B10
NG
+5
C +5,1V
NGA
2587
2555 2553
3588 7586 NGB
47µ 47n 100n
1k5 BC548B
+5,7V
D D
3587
2588
100µ +5,6V
6568
D
BZX79/
5V6
Left total 2501 3501
1
L t 470E
470n
3503
2
E
VREF
A
+4,1V
2502 3502
3 Right total
R t 470E
470n
3504
F
6
VREF
A
+4,1V
2609 3600 3665 3613
Left out 5903 9505
7
G
L 0E 0E 0E
4 µ7
2610 3599 3664 3612 3619
5 Right out 5904
R 0E 0E 0E 0E
4 µ
7
To 54 AF
H
page 4-49
I
1504
J
7513
4 BC858B
MUTE MUTE
EXPANDER
+5,1V
+5
3514
K 16
VDD
7555
PCF8574P
13 AUTO 4 NG
P0
RESET
5 NGA
P1
6 NGB
L 1
P2
Read
11 CM1 (on/off)
2 2 P6
INPUT I C-BUS I/O
FILTER CONTROL Write PORTS 10 CM2 (norm.)
P5
3
7 L/R
P3
2
12 C/S
D
P7
M 8 Bit
2615
SHIFT 9
22n
P4
REGISTER
3632
VSS
15 14 8 +5
+5,1V
N
3616
3 DA1
DA1 1k
3615
1 CL
CLK 1k
O To 21 Front
page 4-19
1 2 3 4 5 6
Bauteile X Y 2506 E 12 2519 D 19 2532
2507 D 13 2520 D 19 2534
Components
2508 E 13 2521 E 19 2535
2509 B 15 2522 E 19 2536
1502 A 1
2510 B 15 2523 J 12 2537
1503 I 30
2511 B 17 2524 J 9 2541
1504 J 1
2512 B 17 2525 J 11 2542
1505 J 28
2513 B 17 2526 K 8 2543
1507 H 5
2514 B 18 2527 J 12 2544
2501 D 4
2515 B 16 2528 J 17 2545
2502 F 4
2516 B 16 2529 J 11 2546
2503 D 12
2504 E 12 2517 C 19 2530 H 19 2547
2518 D 19 2531 B 2 2548
2505 D 12
4 - 53
M 18-C ... M 48-DC
7 8 9 10 11 12 13
+11,5V
+12
37
DECODER
VCC
7501
+2,7V 28 M69032
+4,1V 27
NOISE
SEQUENCER
+4,1V 26
2534 2536
2535
3525
µ
22µ 4n7 10
VREF
3509
+4,1V
23 15k
3511
24
NOISE
15k
SEQUENCER
25
2503 2505 3505
17 18
1 47k
100n 100n
16 2507
INPUT
3507
BUFF. 680p
AUTO-
BALANCE
15
VCA
VREF
+4,1V
2504 2506 3506
+4,1V 14
19
47k
AUTO-
2537 100n 100n
BALANCE
2508
3526
µ 13 SERVO 3508
10
680p
VREF VREF
VREF
+4,1V +4,1V 22
+4,1V
3510
AUTO-
15k
BALANCE
21 3512
VCA
INPUT
15k
BUFF.
+4,1V
20
1
L
32
33 R
30
OPERATION AND CENTER MODE CONTROL
+4,1V
7502
2532
BC558B
36
3521
220n
10k
3522
+4,1V 48
MODIFIED DOLBY B-TYPE NR DECODER
VREF VREF VREF
47
+4,1V +4,1V
LPF
+4,1V
7kHz
In
+4,1V 46 42 +4,1V 41 0V 49 +4,1V 45
2524
2529 2523 2527
3513
470p
5n6 680n 47n
3516 3517
3515 2525
15k
2526 10µ
2n2 +5,1V
+5
3637
7506
BC848B
3560
47k
MS
6555 6556
1N4148 1N4148
NOISE SEQUENCER OPERATION CONTROL OPERATION MODE CONTROL
3631 3633 3634
IC 7501
Noise Mode
pin 23 pin 24 pin 25
+5 +5 +5 Off H X X 2 Channel
+5,1V +5,1V +5,1V
L - R
Left channel L L L
3 Channel
Center channel L L H
L - R - C
Right channel L H L
4 Channel
Surround L H H Prologic
Headphone
7 8 9 10 11 12 13
H 8 2549 F 27 2569 L 21 2586 C
B 7 2550 D 27 2570 M 21 2587 C
B 8 2553 C 4 2571 K 21
2588 D
B 8 2554 H 23 2572 N 21 2609 G
E 8 2555 C 4 2573 K 21 2610 G
H 19 2561 J 24 2574 N 21 2613 J
H 20 2562 J 22 2575 J 21
2614 O 27
D 21 2563 O 22 2576 O 21 2615 M
B 22 2564 B 4 2577 J 23 2630 M 20
H 22 2565 L 20 2578 O 23 2631 L
C 21 2566 M 20 2579 J 26 3501 D
H 25 2567 L 21 2580 O 26 3502 F
F 28 2568 M 21 2585 B 4 3503 E
GRUNDIG Service
Schaltpläne und Druckplattenabbildungen / Circuit Diagrams and Layout of PCBs
14 15 16 17 18 19
+4,1V +4,1V +4,1V +4,1V
VREF VREF VREF VREF
2510 2509 2516 2515 2511 2512 2513 2514
47n 47n 22n 22n 100n 100n 100n 100n
+4,1V +4,1V +4,1V +4,1V +4,1V +4,1V +4,1V +4,1V
11 8 5 4 3 2 1 56
6
2517
55
+4,1V
220n
BPF
2518
7 54
1
+4,1V
µ
4 7
2519
2 x
53
2 x DUAL-TIME
+3,7V
4 µ7
L R 4 x LOG- CONSTANST
L R FULL WAVE DIFFERENCE AND 2520
52
RECTIFIER AMPLIFIER TRESHOLD
+3,7V
SWITCH
220n
BPF
2521
10 51
1
+3,7V
220n
2522
50
+4,1V
220n
9 2 x
POLRITY
SPLITTER
8 x
VCA
2530 3541
4 x
COMBINING 8k2
S' 39
NETWORKS
10µ
2541
5n6
IREF VREF
L R L R S C
31 35 34 +1,5V 40 12 43 +4,1V 44 29 38
2528
3520 3611 3610
VREF 220µ
+4,1V
Center 3662
0E
Left signal path
Center signal path
Surround path
Surround delay path
3663
Surround
0E
CENTER CHANNEL OPERATION MODE CONTROL DC LEVELS
IC 7555 IC 7501 IC 7555
≤
Center mode H = min 3,9V max 5,5V
pin 7 pin 12 pin 31 pin 9 pin 10 pin 11
≥
L = max 0,8V
Off (1) X X L
H L L X = don't care
Normal H L H
Z = open input (typecal 2....3V)
(2)
L H Z Wide L H H
Phanton H H H
H H H
(1)
= Only in versions with Center "on/off" mode option
(2)
L L L = Only in versions with "Wide" option
14 15 16 17 18 19
3 3504 F 5 3517 J 10 3548 E 27
4 3505 D 13 3520 J 15 3549 E 27
3506 E 13 3521 H 7 3550 E 28
3
3 3507 D 13 3522 I 8 3551 G 23
3 3508 E 13 3525 B 7 3553 F 21
27 3509 C 13 3526 E 8 3554 F 21
3510 F 13 3541 H 19 3559 H 22
2 3511 C 13 3542 H 20 3560 L 12
3512 F 13 3543 H 20 3561 L 20
20 3513 J 11 3544 D 20 3562 M 20
4 3514 K 2 3545 D 20 3563 L 21
4 3515 J 10 3546 B 23 3564 M 21
5 3516 J 8 3547 B 22 3565 K 20
4 - 54
20 21 22 23 24 25
DELAY
3547
15E
2544
+5,1V +5,1V
3546
+5 +5
68n
+2,6V 20 +2,6V 21 24 1
VCC VDD
7541
4k7
M65843P
ADM
MODULATOR
+0,9V 18 AUTO 16k
MOD RESET
RESET SRAM
2546
100n
OP1
D
DATA OUT 1
3544
23
18k
DATA IN
+2,6V
2543
470p
LPF1
3545
22 MAIN
5k6
CONTROL
+2,6V
8
LOGIC
4 REQ
5 CLK
DELAY
TIME
6 DAD
CONTROL
DATA OUT 2 DEM
3553 3554
CLK
+5
MODE
+5,1V
MODE
CONTROL
DIG. GND
+2,6V 19 7 +2,2V 2 +2,2V 3 9 10 +0,9V 17 11
3551
D D D
1M
3542
15k
2545 2554 5510 2547
3559
3543 µ
47µ 4 7 100n
15k 10V 2MHz
2542
D D
5n6 +5
+5,1V
SOFAC
2579
3567 2575 +4,7V
+4,7V
4k7 1
+9,3V
2562 2577 2561
470n
+9
47µ 5n6 10n
2573
31 6 19 +4,7V 5 3 4 12 16 15 13 11
µ
0 47
VCC Ripple in Rear Front Input Input Input Input
A B C D
Center Center Center Center
3565 2571
7
BASS TREBLE VOLUME 2
4k7 MUTE
CENTER CENTER CENTER
220n
+4,7V
2565 3561 2567
9
22k
0 µ
8n2 47
2631 VOLUME 1
3563
100p LOUDN.
7561
CENTER
2569 TEA6321T/V1
8
µ
0 22 LOGIC SOURCE
2566 3562 2568 CONTROL SELECTOR
24
22k
8n2 0 µ 47
2630
VOLUME 1
3564
100p LOUDN.
SURR.
2570
25
µ
0 22
3566 2572
26
BASS TREBLE VOLUME 2 2
4k7 I C
SURR. SURR. SURR.
220n
Input Input Input Input
+4,7V
A B C D
2574
Ripple in Rear Front DA CL Surr. Surr. Surr. Surr.
µ
0 47
2 27 21 +4,7V 28 30 29 1 32 17 18 20 22
2580
3568 2576 2563 2578
+4,7V
4k7
100µ 5n6
1µ
470n +4,7V
20 21 22 23 24 25
3566 N 20 3615 O 2 3647 O 26
3567 J 20 3616 N 2 3648 O 27
3568 O 20 3619 G 5 3649 N 27
3586 B 2 3631 N 7 3662 L 19
3587 D 3 3632 N 7 3663 M 19
3588 C 2 3633 N 7 3664 G 4
3589 B 2 3634 N 8 3665 G 4
3599 G 3 3635 L 16 5510 H 23
3600 G 3 3636 L 16 5903 G 2
3610 J 18 3637 K 12 5904 G 2
3611 J 18 3644 J 26 6555 L 12
3612 G 4 3645 J 27 6556 L 12
3613 G 4 3646 J 27 6557 L 17
M 18-C ... M 48-DC
26 27 28 29
A
B
C
D
LPF2
13
2550
3550
470p
14
18k
+2,6V
3549
E
OP1
3548
15
15k
+2,6V
2549 2548
68n 3n3
16
+2,6V
F
ANG. GND
G
12
H
I
1503
3644
1
470E Center
µ J
2613
3645
100p
3646
1k
14
7509
Input
BC848B
Mono
K
Linear
Out C
10
L
2
MUTE
A
Linear
Out S M
23
N
3649
1k
7510
BC848B
3647
3
470E Surround
2614
3648
100p
To 1351 Power O
page 4-73
9703
26 27 28 29
6567 C 3 7585 B 3
6568 D 3 7586 C 3
7501 A 11 9505 G 5
7502 H 8
7504 L 15
7505 K 16
7506 K 12
7509 K 28
7510 N 28
7513 J 2
7541 C 21
7555 K 3
7561 L 24
GRUNDIG Service