Grundig GV 500 SV/1 Serviceanleitung Seite 60

Platinenabbildungen und Schaltpläne / Layout of PCBs and Circuit Diagrams
Chassisplatte – Empfangseinheit / Family Board – Frontend (FV)
1 2 3
* VERSION
Pos. PAL-BG PAL-I PAL-I-IR PAL-BG/SEC-L
A
1701 UV916E U944C UV916E
G1984M
1720 J1952M J1952M
1721
1722
1740 TRAP 5,5MHz TRAP 6,0MHz TRAP 6MHz
B
1741
1745 BP 5,5MHz BP 6,0MHz BP 6MHz
1746
2706 1n 1n 1n
C
3709 0E 0E 0E
3745 560E 560E 560E
3746
270E 270E 270E
3747
3915
D
5740 15uH 15uH 15uH
TDA9800T
7720 TDA9800T TDA9800T
7721
for TDA 9800 only 2746, 3706, 3732, 3760, 3910, 3912, 3916, 3918, 3919, 3922.
for TDA 9812 only 2741, 2744, 2749, 2750, 3704, 3735, 3764, 3911, 3913, 3917, 3923, 3924, 3940
E
+12ASWS
F
6 5
VCC2 AGC
I III
GND VCO
G
I III
BPF
AGC MIX
RF
H
AGC
BPF MIX
U
I III U
VCO
I PLL
U
CL DA VCC1
13 14 12 11
J
GND GND
K
5VSWA +33V
SCL SDA
FROM DE
1 2 3
4 - 23
4 5 6 7
PAL-BG/SEC-DK
UV916E UV916E
K2955M
K6256K
L9453M
TRAP 5,5MHz TRAP 5,5MHz
BP 5,5MHz BP 5,5MHz
BP 6,5MHz
220p 1n
100E 0E
560E 560E
560E
330E 270E
0E
15uH 15uH
GND
TDA9800T
TDA9812T
* 3709
26 * 2706
5721
6 3
2
4 1
GND
*
1701
GND
IF
17
AMP
BPF
3701
16
GND
MT
GND GND
GND
CS
15
GND
...V MEASURED IN PLAYBACK MODE
...V MEASURED IN RECORD MODE
4 5 6 7
GRUNDIG Service
Platinenabbildungen und Schaltpläne / Layout of PCBs and Circuit Diagrams
8 9 10 11
H = SEC L'
SB1
L = PAL, SEC L
only for SEC-L or PAL-BG/SEC-L
5VSWA1 5VSWA1
*
1722
BA582 40.4MHz 1
4
Band 1
6825
OFW
2722 BA582
32.4MHz 2
5
1n
6826
7824 3
BC848B
GND
3832
100k
GND
7823
BC848B
2.9V
GND GND
2.9V
*
1720
1
4
OFW
2
5
3
* 1721
2.1V
GND 1 4 2.9V
OFW
5VSWA
10 5 2.9V
3 6 7 8 2
6722
2.9V
GND
BA582
5.5-9V
+12ASWS
GND GND
for PAL-BG/SEC-L
* 3704
680E
* 3706 2.6-9V
1k 680E
5VSWA
7727
BC848B
GND
GND
8 9 10 11
4 - 24
12 13 14 15
7726
DTC124EK
GND
AFC-Adj.
* 2749 * 3735
* 2750
5725
180E
2u2
220n
* 2746 * 3732
41645
390E
100n
2748
GND GND GND
8p2
6 5 22 21 20
SIF AGC
INTERCARRIER
28
SIF AMP. MIXER
AM DEMODULATOR
27
6 17 16 15
TDA9800T/V3 8p2
TRAVELING
*
7720
WAVE VCO AFC
DIVIDER
1
FREQUENCY
1
3.3V
DETECTOR
VIF AMP
VIDEO
VIDEO
AND PHASE
3.3V DEMODULATOR AMPLIFIER
DETECTOR
2
2
TUNER IF BUFFER AND
AGC
NOISE
AGC AGC
DETECTOR
CLIPPING
16 12
3 4 19 5 8 14 13
4 25 3 7 19
* *
* * *
AGC-Adj.
* *
5740
*
GND GND
5VSWA
GND GND
* 1740
1
2
2.6V
GND
7724
BC848B
* 1741
2V
1
2
GND
GND
PAL BG/SEC L
PSS
AGC
FROM DE H = PAL BG
TO DE
L = SEC L
12 13 14 15
16 17
BAND-1
Adj.
9 14 NC
TDA9812T
7721
*
9 2V
AF
1.6V 1
AMPLIFIER
1
10
FM-PLL 1
12
7
2.4V
2
8
0V
23
IRV 18
2
20
11
18 17 15 26
* 3918
* 0E
* 3916
*
0E
* 1745
*
3745
560E
1 3
2
GND
* 1746
* 3746
3
560E
1 3
2
GND
5VSWA
3
16 17
GRUNDIG Service