4 - 16
GRUNDIG Service
Platinenabbildungen und Schaltpläne / Layout of PCBs and Circuit Diagrams
TVR 37…, TVR 51…, TVR 55…
1301
0,1V
50
51
2,4V
1,3V
2,5V
2,5V
0,5V
2,6V
2,6V
0,3V
2,5V
14,5V
13,5V
3V
2,7V
315V
290V
IN
BECAUSE A HOT GROUND IS PRESENT IN THE POWER SUPPLY CIRCUIT, AN ISOLATION
TRANSFORMER MUST BE USED. ALSO, IN ORDER TO HAVE THE ABILITY TO INCREASE
THE INPUT VOLTAGE SLOWLY, WHEN TROUBLESHOOTING THIS TYPE OF POWER SUPPLY
CIRCUIT, A VARIABLE ISOLATION TRANSFORMER IS REQUIRED.
HOT GND
COLD GND
Degaussing Coil
OUT
HOT PART
Ubat
0,1V
3333 G 7
3331 F 9
3330 G 4
3328 I 2
3327 I 2
3324 K 2
3322 K 3
3313 C12
3312 C11
3310 B 8
3304 C 6
3300 C 3
2594 F21
2593 C26
2592 I33
2589 C27
2586 F25
2583 H22
2582 M32
2581 H21
2575 F26
2574 D25
2555 M28
2553 L30
2552 F22
2551 K30
2520 M26
2519 O25
2517 M20
2516 L24
2515 M19
2514 L20
2513 L22
2512 J27
2392 I14
2381 G13
2379 J14
2378 K14
2377 H13
2375 L14
2374 H14
2373 G15
2371 F13
2363 E14
2353 J18
2352 L15
2351 J14
2341 K 4
2338 L 9
2337 L 9
2336 J10
2335 K10
2332 F10
2331 E10
2330 H 8
2329 H 2
2328 H10
2327 H 2
2325 I 2
2324 J 2
2323 K 2
2320 K 5
2317 E 9
2316 D 7
2314 C10
2312 C12
2309 H 7
2308 G 7
2305 D11
1926 J33
1925 B19
1924 B 9
1923 L33
1922 O20
1921 B15
1371 G13
1311 D 5
1300 C 7
1001 D 2
1000 C 3
4
5
1
6
7
8
9
10
11
2
3
N
M
L
K
J
I
H
G
F
E
D
C
B
A
P
O
4
5
1
6
7
8
9
10
11
2
3
220n
2316
2309
4n7
2308
1n
220p
2336
4n7
2330
470p
2332
2331
10n
1n
2324
2329
330p
470p
2327
2341
2n2
1n
2314
1n
2305
680p
2328
4n7
2338
100n
2337
2323
4n7
1n
2312
2325
560p
24k
3345
5k9
3363
20k
3362
3300
4M7
33
3
270k
3331
330E
3359
180k
3348
10k
3342
33k
3328
1k
3339
6k8
3327
10k
3330
100k
3324
18k
3322
3304
270E
11k
3356
20k
3357
0E47
3334
3337
2E
68E
3333
3312
3M9
100E
3347
BAT85
6348
BYD33J
6332
BAV21
6334
BAV21
6335
1N4006GP
6315
1N4006GP
6313
1N4006GP
6314
1N4006GP
6316
BYD33D
6336
9309
9303
9308
1311
T4AH
2317
47u
2u2
2320
100u
2335
5313
CU15D
3310
1
2
3
1924
1
2
39E
3338
5E6
3341
5350
80E
5354
80E
5331
1
3
4
5
6
7
2
8
STP4NA60FI
7330
1300
1000
1
2
3
4
1001
2
1
4k7
3358
7310
MC44603P
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
CAUTION : LETHAL POTENTIALS AT PRIMARY
DO NOT OPERATE WITHOUT CASE
ISOLATION TRANSFORMER WHEN SERVICING
HOT CIRCUIT , BE CAREFUL AND USE AN
52
Leistungs-Chassis / Power Chassis TVR 37… (GSPD)
