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4 - 28 GRUNDIG Service
Platinenabbildungen und Schaltpläne / Layout of PCBs and Circuit Diagrams GV44…, GV45…, GV46…
+
47U/25V
2245
+
100U/10V
2250
+
47U/25V
2212
+
47U/25V
2218
+
4,7U/63V
2252
+
1U/100
V
2228
47N
2215
1,5N
2225
15N
2255
8,2N
2256
22N
2257
6,8N
2217
0,1U
2210
12N
2247
1N
2222
2,2N
2213
0,22U
2220
0,22U
2253
Y
820P
2223
5,6M
3332
20K
3337
15K
3338
8,2K
3340
6,8K
3342
4,7K
3297
820
3345
470
3347
10K
Y 3292
330
3307
200
3305
470
3330
390K
3303
16K
3302
100K
3335
1K
Y
3333
100K
3308
68K
Y 3290
6,8K
3295
BC848C
7250
67
07202-053-10
1060
AUDIO
AUDIO
RLS4148
Y
6204
4,7K
3300
RIPPLE
FILTER
DET
ALC
MUTE
MUTE
MUTE
POWER
CTL
MUTE
MUTE
REC
POWER
+
+
-
-
LA7282M
EE\PB
REC\EE
EP
EE
EE
CTL
CTL
CTL
CTL
LP
REC
REC
REC
REC
PB
PB
PB
PB
LINE
ALC
24
21
23
17
20
1516142213121018
7
19
11
9
8654231
7220
+12VD
+12VD
I
H
G
F
E
D
C
B
A
8
8
7
7
6
6
5
5
4
4
3
3
AF 2312
AF 7320/47
PB
REC
SIGNALPEGEL BEI AUFNAHME F=315Hz/SIGNAL LEVEL RECORDING F=315Hz
SIGNALPEGEL BEI WIEDERGABE F=315Hz/SIGNAL LEVEL PLAYBACK F=315Hz
~
V
~
V
MICRO
6243
A
AF 1518/9
LL
500MV
500MV
210mV
1V
55mV
39mV
210mV
...V DC Voltages measured in record
...V DC Voltages measured in playback
0,7V
0V
0,1V
0V
9V
4,2V
1,4V 0V
0V3,8V0V
0,5V
3,8V
3,8V
3,8V
3,5V 0,5V 0V 0V 0V
0,1V
0V
62
Chassisplatte – Standardton / Family Board – Standard Sound (AL)