Grundig GV400 Servicehandbuch Seite 40

www.freeservicemanuals.info
Netzteil / Power Supply (MSM1)
Primärseite mit TDA4605-3 / Primary Side with TDA4605-3
1 2 3
A
1
B
AC
230V
1101
2
T2A
C
3104
470E
D
3122
270k
3123
680k
1.7V 7110
E
4
VG min
Vref VGA
3121 3
ref.
3k3
voltage
typ. 3V
2118 2
1n8 0.1V
F
1
1
V2B
3124
3k3
Vu
VSt
0.3V
low voltage
protection
G
regulating
& overload
amplifier
TDA4605-3
H
I
HOT CIRCUIT , BE CAREFUL AND USE AN
ISOLATION TRANSFORMER WHEN SERVICING
J
DO NOT OPERATE WITHOUT CASE
CAUTION : LETHAL POTENTIALS AT PRIMARY
K
.. OSCILLOGRAMS
1 2 3
GRUNDIG Service-Technik
Platinenabbildungen und Schaltpläne / Layout of PCBs and Circuit Diagrams
4 5 6 7
3109
3E3
5103
2x47m
2
1.7V
6116
output stage
supply 5
and
voltage current
1N4148
limit
monitor
6
9.2V
VGE VG max
7
primary 1.3V
3
current
reproducer 8
logic
starting
7135
impulse
BUZ90A
generator
6115
stop
1N4148
comparator
zero
transit
detector
2115
VR
220n
1.3V
3126
10k
5
VOLTAGES ARE MEASURED IN RECORD MODE
4 5 6 7
8 9 10
SMPOWERTRANS
5114
6201
14
BYD73C
6
13 6203
MUR410
10 6204
7
MUR410
8
6206
12
BYD73C
9
11
5207
16
22u
4
6
3127
3209
33E
15
4E7
4
6210
18
SB340
17
3
6.3V 5.4V
4 1
CNX82A
6
3
7210
5 2
9.4V
4.3V
COLD GND
HOT GND
8 9 10
4 - 5 GRUNDIG Service-Technik
Platinenabbildungen und Schaltpläne / Layout of PCBs and Circuit Diagrams
11 12 13 14
7
8
5203
33u
5204
0.33u
2212
100n
5210
22u
5209
22u
3203
470E
3.6V
2217
100n
3208 3206
220E 1k0
3
7253
2.5V
1
TL431
2
11 12 13 14
It`s Free
15 16
1101 C 2
2101 B 3
2103 C 3
2105 B 4
2107 C 4
2108 B 5
A
2112 C 7
2113 C 8
2114 G 7
SM1
2115 G 6
2116 D 8
2117 I 7
GNDA
2118 F 2
15
2119 H 8
2121 J 7
GNDD
2201 B11
14
2204 C11
+5V2D
B 2206 D11
13
2207 C11
2209 E11
HELO
2210 F11
12
2211 F11
+5A
2212 F12
11
2214 G11
2215 G11
HEHI
10 2217 I12
3102 C 4
+5A
3103 D 4
C
9
3104 C 3
3106 B 5
+33V
3109 A 6
8
3112 C 6
GNDM1
3119 D 6
7
3120 G 2
3121 E 2
GNDM2
6
3122 D 3
3123 D 3
+8M2
3124 F 2
D
5
3125 G 8
3126 H 7
+14M1
4 3127 F 8
3129 D 7
-28V
3130 D 7
3
3131 F 7
3132 F 7
+14A
3203 H12
2
3204 I13
GNDA
3205 I12
E
1
3206 I12
SM111
3207 J13
3208 I11
3209 G11
to Deckelectronic F1 3210 I13
5103 B 4
5114 A 9
5203 C12
5204 D12
F 5207 F11
5209 G13
5210 G13
6110 B 6
6111 B 6
6112 B 7
6113 B 7
6114 E 8
6115 G 7
6116 E 7
G 6201 A11
6203 C11
6204 D11
6206 D11
6210 G10
7110 E 3
7135 F 6
7210 J 8
7253 J11
SM111 E16
H
I
J
MSM1(TDA)_9310 K
N.A. 9318
15 16
4 - 5