GRUNDIG Servicetechnik
GRUNDIG Servicetechnik
12
11
Platinenabbildungen und Schaltpläne / Layout of PCBs and Circuit Diagrams
Platinenabbildungen und Schaltpläne / Layout of PCBs and Circuit Diagrams
Chassisplatte – Empfangseinheit / Family Board – Frontend (FV)
28
27
26
.. OSCILLOGRAMS
..V
..V
MEASURED IN PLAYBACK MODE
MEASURED IN RECORD MODE
13.36
13V
7.4V
5.3V
14.5V
14.8V
12V
4.6V
1.2V
2.9V
3.1V
2V
2V
2.6V
2.3V
1.1V
1.4V
1.9V
1.8V
2.6V
1.9V
1.6V
2.7V
2.7V
2.6V
5.1V
3.4V
3.4V
1.2V
6.2V
0V
12V
0V
12V
11.9V
11.9V
0V
12V
12V
12V
12V
1.1V
12V
5.1V
5.2V
0.5V
5.2V
12V
OUTPUTVOLTAGES IC7701 SHOULD BE 0V OR 11.9V
TUNED TO UHF APPROX. CH 26
30.6V
2.9V
2.3V
1.8V
0.5V
0.5V
0.6V
0.6V
TO VS/IO
TO VS/IO
A.N. 9408.1
N12-FV
AGC-ADJ.
AFC-ADJ.
IN CASE OF REPLACEMENT SEE FRONT END ADJUSTMENTS
AFV
PLL
SFSH5.5MDB
UV916E
SFSH6,5MDB
TPS6.5MB-TF21F
K2950M
SEC DK
PAL BG
not used
not used
not used
not used
deleted for eco
PLL
VST
VST
VST
HYP
UV916E
SFSH5.5MDB
TPS5.5MB-TF21F
G1966M
PAL BG
SFSH5.5MDB
(POS 1723/1724)
(POS 1722)
U943
UV917
UV917
TUNER
SFSH6,5MDB
SFE6,0MB
SFSH5.5MDB
TPS6.5MB-TF21F
TPS6.0MB-TF21F
TPS5.5MB-TF21F
K2950M
J1952
G1966M
SEC DK
PAL I
BANDPASS
TRAP
OFW
SYSTEM
PAL BG
1%
1%
TO DE
1%
1%
1%
1%
OFW
PAL BG
2%
2%
2%
BANDPASS
TRAP
0E for PLL
only
for VST only
for PLL only
for PLL only
for PLL only
for PLL only
pal_BG only
for sec_DK and
delete for pal_BG
for vst only and delete for pal-I
PLL
U944C
SFE6,0MB
TPS6.0MB-TF21F
J1952
PAL I
HYP
7703 I14
7702 C12
7701 H 4
7700 F 8
7700 I 8
6702 H14
5722 E12
5721 A 9
5720 C 6
5703 A12
5701 G12
3954 D 7
3953 E 5
3761 E10
3760 J 6
3757 H13
3756 H14
3755 G15
3754 H15
3753 I14
3752 H13
3751 I12
3750 H12
3747 H10
3746 G10
3745 F 4
3744 E 6
3743 E 7
3742 F 7
3741 F 8
3740 F13
3739 F 4
3736 G 1
3735 G 2
3733 E15
3732 D14
3731 E13
3730 E12
3729 B14
3728 A14
3725 A11
3724 E 9
3723 D 8
3722 D 7
3721 D 7
3720 D 8
3708 K 9
3707 J 9
3706 J 7
3705 I 6
3704 I 5
3703 E 3
3702 E 4
3701 K 9
3700 F 8
2760 F 4
2750 H14
2733 E 5
2732 H12
2730 K 4
2729 C14
2728 B15
2727 A11
2726 E11
2725 E11
2724 D 7
2723 A10
2722 A10
2721 C 8
2720 C 8
2707 E 5
2705 I 8
2704 I 5
2703 A 2
2702 J 7
2701 I 7
2700 J 6
1724 F13
1723 E13
1722 E12
1721 C 7
1720 B 4
1701 K 2
7714 E 7
7713 E 6
7712 D 7
7711 G 1
7710 F 1
7709 F 3
7708 G 2
7707 H14
7706 G15
7705 D15
7704 F 8
4
5
1
6
7
8
9
10
11
12
13
14
15
16
2
3
H
G
F
K
E
D
C
B
A
J
I
H
G
F
K
E
D
C
B
A
J
I
4
5
1
6
7
8
9
10
11
12
13
14
15
16
2
3
1k2
3747
1k
3753
470E
3752
4k7
3751
18k
3750
470E
3757
1k2
3746
100k
3761
SCL
SDA
AGC
SDA
PWM
STROBE
SCL
AFC
+14A
5VAS
+33V
VFV
AFV
100E
3703
100E
3702
0E
3953
1k
3720
4k7
3745
82k
3760
22k
3756
560E
3725
47k
3736
47k
3735
2k2
3707
68k
3706
22k
3705
18k
3704
10k
3700
13k
3701
3729
18k
22k
3722
6k8
3721
0E
3954
2k2
3733
2k2
3732
3728
18k
330E
3730
560E
3731
560k
3708
10E
3755
330E
3754
470E
3740
22k
3739
3k9
3741
18k
3742
4k7
3743
1k
3744
5VAS
+12AS
+12AS
+12AS
+12AS
+12AS
5VAS
+12AS
+12AS
+12AS
5VAS
+12AS
+33V
5VAS
+12A
+33V
+12AS
100n
2707
220n
2760
100n
2727
100n
2722
2721
2720
100n
2701
220n
2700
100n
2726
100n
2703
10n
2705
10n
2704
22n
2702
100n
2728
100n
2733
6u8
5701
6u8
5721
15u
5722
1u
5720
7710
DTA124EK
LM358DT
7700
2
3
1
4
8
5
6
7
7700
LM358DT
BC858B
7711
BC858B
7705
BD436
7706
BC857B
7713
7712
BC848B
7708
BC848B
7709
BC848B
7707
BC847B
7714
1723
1
2
3
1724
1
2
3
6702
470n
2730
10u
2724
100u
2732
22u
2723
2u2
2729
2u2
2725
4u7
2750
PLL
3723
22k
3724
1701
7
1
2
3
4
5
6
8
TL431CLP
7703
2
1
3
7704
HEF4104BP
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
LEVEL
CONVERTER
7701
HEF4094BP
10
9
3
2
15
4
5
6
7
14
13
12
11
1
16
8
E0
VDD
O5
O7
O3
O6
O0
O1
O2
O4
VSS
CP
D
STR
SHIFTREGISTER
1720
UV917
10
11
12
13
14
15
16
17
5
6
7
8
MT1
MT2
I
III
U
I
I
I
III
I
U
U
I
+12V
M
M
G
G
5703
1
2
3
4
6
7702
TDA9800/V3
10
11
12
13
14
15
16
17
18
19
1
20
2
3
4
5
6
7
8
9
VIDEO
AGC
VCO
IF
AGC
WAVE
DIVIDER
DETECTOR
TRAVELING
DETECTOR
FREQUENCY
AND PHASE
DEMODULATOR
AGC
DETECTOR
TUNER
VOLTAGE
INTERNAL
REFERANCE
3-stage
IF-amplifier
8p2
BUFFER AND
AFC
CLIPPING
NOISE
AMPLIFIER
VIDEO
AMPLIFIER
FM-PLL
AF
1721
3
1
2
4
5
1722
1
2
3
