GV 27 EURO, GV 7… EURO
Circuits imprimés et des schémas électriques / Layout of PCBs and Circuit Diagrams
GV 27 EURO, GV 7… EURO
Circuits imprimés et des schémas électriques / Layout of PCBs and Circuit Diagrams
GRUNDIG Service
4 - 31
GRUNDIG Service
4 - 32
Circuit principal – Alimentation (PS) / Chassis Board – Power Supply (PS)
4
1
3
... chip components
...V MEASURED IN PLAYBACK MODE
...V MEASURED IN RECORD MODE
…
OSCILLOGRAMS
2
for Mono
BYW98-200
L4812CV
not used
for Mono
for Stereo
for Stereo
for Mono
(Optocoupler)
(Power-Supply-Controller)
(Switching-Transistor)
(REF-Regulator)
(12V-Regulator)
(Buffer)
(9/14VM2-SWITCH)
(Buffer)
(SWITCH)
(SWITCH)
MSR25A
for Stereo
for Stereo
for Mono
for Mono
10,1V
220-240V 50/60 Hz
COLD GND
HOT GND
< 6W Standby
not < 6W Stby
from DE/DC
NP0
X7R
X7R
L
not used
not used
3394-2
3394-1
to FV
to I/O,DE/DC
to/from DE/DC
to AL,AF
to VPS/PDC,
I/O,FV,AF
to AL,FV
to VS_S,HA,DE/DC
OS,VS,FV
to DE/DC
not used
2,5V
10,6V
2,5V
0,7V
2,2V
0,1V
0V
2,4V
3,8V
2,4V
play 8,2V
Wind 14,4V
14,3V
14,3V
0,1V
0V
0,7V
12V
14,3V
for Stereo
;
not used
not used
optional
optional
* Discharge C2362 before repairing !!!
*
PS(40393)
3396 B15
3395 A15
3394 F15
3393 J12
3392 J11
3391 G20
3390 I20
3389 E14
3388 E15
3387 E14
3386 B15
3385 B14
3384 B13
3383 G10
3382 H22
3381 G20
3380 H21
3379 A14
3378 B15
3377 A15
3376 A14
3375 A13
3374 A12
3373 J 6
3370 J 7
3369 J 6
3367 C10
3365 G 9
3363 F 9
3362 G 4
3361 D 8
3360 D 8
3359 G 5
3358 G 3
3357 E 9
3356 G 2
3355 G 3
3354 G 1
3353 F 1
3352 E 2
3351 E 2
3350 C 4
2386 E 2
2385 H22
2383 H21
2381 D 7
2380 E 8
2379 E 9
2378 C14
2377 C13
2376 C15
2375 G10
2374 I12
2373 G16
2372 A14
2371 I13
2370 G15
2369 G14
2368 E13
2367 G13
2366 F10
2365 F13
2364 E13
2363 C13
2362 H 9
2361 D 9
2360 I 6
2359 E15
2358 G19
2357 H 9
2356 G 6
2355 G 4
2354 H19
2353 G 2
2352 F 2
2350 D 2
1370 J 7
1356 I15
1355 H13
1353 J 5
1352 J15
1351 H15
1350 C14
0075 H 1
6372 C16
6371 B13
6360 I 9
6359 H13
6358 G13
6357 F13
6356 D13
6355 C13
6354 F10
6353 G 8
6352 F 8
6351 E 7
6350 C10
5368 E10
5361 C10
5358 E13
5355 F15
5354 J14
7353 I19
7352 B12
7351 A10
7350 D 9
7356 I21
7354 C 5
5353 J11
5352 I 7
5351 H14
5350 F15
3999 H17
3998 F17
9998 I15
9997 I15
7357 F19
9996 H15
9995 H13
7420 F15
7359 F14
7358 D15
4
5
6
1
7
8
9
10
11
12
13
14
15
16
17
2
18
19
20
21
22
23
3
H
G
F
K
E
D
C
B
A
J
I
H
G
F
K
E
D
C
B
A
J
I
4
5
6
1
7
8
9
10
11
12
13
14
15
16
17
2
18
19
20
21
22
23
3
3396
22k
3367
3394
2k2
3373
220E
3388
1k
3387
1k
3361
47E
1%
3363
1E2
3369
39k
3370
39k
3383
220k
3365
220k
3392
3M3
3393
3M3
3384
100E
3385
3k3
3386
330E
3395
22k
0075
1
qpsblech
GND
3390
220k
3380
1k
3381
100k
3391
220k
3357
4k7
3999
0E
3998
0E
3389
2k2
3354
2k2
3353
10k
3356
22k
1%
3350
10k
3352
5k6
3360
68E
3351
22k
3377
4k7
3376
0E
3378
2k7
3375
1k
3358
82k
3355
8k2
3374
270E
3359
470E
3382
10k
3362
4k7
16V
470u
2374
16V
220u
2385
16V
470u
2371
16V
100u
2370
50V
47u
2363
25V
220u
2364
50V
47u
2361
400V
22u
2362
50V
1u
2356
16V
470u
2365
25V
220u
2367
16V
220u
2373
50V
10u
2376
10u
5350
22u
5351
20%
330n
5355
10u
5354
22u
5361
BYD33D
6353
BYD33D
6352
BAT85
6351
SBYV27-200
6357
BAV21
6350
1N5062
6354
BYD33D
6356
BYD33D
6355
BYV27-200
6358
SB340
6359
BYD33D
6371
BC847B
7356
BC847B
7359
GNDD
50V
470p
2386
25V
100n
2354
50V
4n7
2379
50V
1n
2381
50V
1n
2380
50V
47n
2383
25V
220n
2372
25V
100n
2369
50V
1n
2355
2%
50V
470p
2350
50V
1n
2352
25V
100n
2353
25V
220n
2359
25V
100n
2358
6372
BZX79-F33
275V
68n
2360
400V
10n
2375
250V
1n
2357
5%
2kV
47p
2366
10%
500V
470p
2377
500V
1n
2368
400V
10n
2378
9998
9995
9997
9996
T1A
1355
T1A
1356
T500mA
1351
T100mA
1350
T500mA
1352
T1,25A
1353
CSW
9/14VM2
-28V
HEHI
HELO
33V
14VM1
12VA
5VA
5VD
ISTBY
5VASW
12SW
1370
BD438
7358
FB
5368
FB
5358
5VD
33V
12SW
STD17N06
7353
STD17N06
7357
5353
4
6
10
11
12
13
14
15
16
17
18
1
7
SOC1012T
7351
1
2
3
4
5
6
L78M12CV
7420
DF06M
6360
MC44603P
7354
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
(REDUCED FREQUENCY)
AMP
ERROR
FOLDBACK
MANAGEMENT
OSCILLATOR
Iref
DEMAGNETICATION
Vdem out
STANDBY
2.5V
P
F
T
FOLDBACK INPUT
E/A OUT
R standby
Sync
R standby
VOLTAGE
C
FEEDBACK
Vdem in
CURRENT SENSE INPUT
Vosc
REFERENCE
Vref
BLOCK
Iref
enable
Vref
CURRENT
SENSE
Vosc prot
Iref
Dmax & SOFT-START
INITIALIZATION BLOCK
Set
Latch
Reset
SHUTDOWN
THERMAL
CONTROL
SUPPLY &
Q
Rref
Soft Start & Dmax
Iref
Vovp out
Vref
BUFFER
OVERVOLTAGE
MANAGEMENT
UVLO1
Vref
OVERVOLTAGE
PROTECTION
UVLO1
Vcc
Vcc
OUTPUT
GND
18V
Vc
STP3NA60FI
7350
2
1
TL431CLP
7352
R
A
K
CAUTION : LETHAL POTENTIALS AT PRIMARY
DO NOT OPERATE WITHOUT CASE
ISOLATION TRANSFORMER WHEN SERVICING
HOT CIRCUIT , BE CAREFUL AND USE AN
470E
3379
UF1922V4
5352
Reference
Oscillograms ....4-38
AF....................4-29
AL ....................4-25
DC ...................4-35
DE ...................4-33
FV....................4-21
FM ...................4-24
HA ...................4-30
IO.....................4-27
OS ...................4-24
PS....................4-31
QMB ................4-15
QNIC ...............4-36
VP....................4-24
VS....................4-25
VS-S ................4-28