Audio Amplifier Boards - Grundig PA 5 - Turnit Serviceanleitung

Schaltpläne und Druckplattenabbildungen / Circuit Diagrams and Layout of PCBs
Audio-Verstärker-Platten

Audio Amplifier Boards

C144 R108
+
1K
1u/25V
A A
1
P917
2
p. 3-36
3
A
C150
R122
+
1K
1u/25V
A A
T106
0V/-35V
BC546_B
R132
47K
A
-V
C144.
R108.
F
1u/25V 1K
A A
1
P916
2
p. 3-36
A
C150.
R122.
F
1K
1u/25V
A A
T106.
0V/-35V
BC546_B
R132.
47K
A
-B
3 - 39
+V
1
10 5 IC105
0V 09238-197.01
+
L101
3
LM3876
0V
9
-
8
4
7
0V
A
-V
C146
R111
C126.
+
K
22K A
1u/100V
22n
R112
27K
C125
R113
K
27K
47p/5%
+V
A
C127.
1
IC104
0V 10 5
09238-197.01
+ K
L102
3 22n
LM3876
0V
9
-
8
4
7
0V
A
C148
R163
-V +
A
22K 1u/100V
R118
27K
C130
R117
K
27K 47p/5%
A A
A A
+B
1
0V 10 5 09238-197.01
IC105.
+
L101.
3
LM3876
0V
9
-
8
4
7
0V
A
-B
R111. C146.
C126.
+
K
A
22K 1u/100V
22n
R112.
27K C125.
R113.
K
27K 47p/5%
+B
A
C127.
1
10 5 IC104.
0V
09238-197.01
+ K
3 L102. 22n
LM3876
0V
9
- T104.
8
BC546_B
4
7
0V
A
C148.
R163.
-B
+
A
22K 1u/100V
R118.
T105.
27K
C130. BC546_B
R117.
K
27K
47p/5%
A A
A
GRUNDIG Service
PA 5 - Turnit Schaltpläne und Druckplattenabbildungen / Circuit Diagrams and Layout of PCBs
P103. IC101
7812CT +26V
R165
BL 3 1
+12V OUT IN
2
C 100
BN
1
2
TO KEHLER TUBE
A A A A
+35V
+V
A
P104.
BL
2
BN
1
TO KEHLER TUBE
-V
-35V
A
T104
BC546_B
IC103
-26V
7912CT R155
3 2
-12V OUT IN
C 100
1
A A A A
A
T105
BC546_B
A
P103.
BL
AUDIO BASS BOARD
2
BN
1
TO WOOFER
+35V
+B
A
P104.
BL
2
BN
1
TO WOOFER
-B
-35V
A
STANDBY_BASS
A
(0.5V / +12V)
DC_PROT_BASS
A
+12VR
MUTE_BASS
P112.
P918
p. 3-38
3 - 40
P907
p. 3-38
P112
MUTE_TREBLE
DC_PROT_TREBLE
A
STANDBY_TREBLE
(0.5V / +12V)
RL106
D120 SI102
2 1
1N5401
T4AL
P110
D119
1
EEE Transf.
1N5401
2
F
D118 p. 3-36
A 3
0u1 A
A
1N5401
D124 SI103
4 3
1N5401
T4AL
6 5
1N4148 1N4148
D112 D114
RL106.
D120. SI102.
2 1
1N5401
T4AL
P110.
D119.
1
1N5401 2 Transf.
D118.
A 3
p. 3-36
A
1N5401
D124. SI103.
4 3
1N5401
T4AL
6 5
1N4148 1N4148
D112. D114.
PA 5 - Turnit
21/01/98
GRUNDIG Service