GRUNDIG Service
3 - 27
GV 900…, GV 940…
Fehlersuchdiagramme / Troubleshooting / Schémas de dépistage d‘erreurs
I2C
(I2C)
Tuning
VPS / PDC
Audio/CTL
Head
IC 701
IC 201
Euro-A
V 1
(TV)
SE-L
IC 6301
ZF / IF (IC 1602)
CTL
IF / ZF
5,74MHz /
B.B. OUT
TUNER AUDIO
7
9
OUT
11
LINE 3
52
49
47
Y-Noise Reduct.
Drop-Out
C-Combfilter
28
31
Keyboard
VIDEO OUT
16
21
LINE 1
Linear Audio
SP; LP; EP
System Controller
DISPLAY-Driver
Extension-Port
R/C Receiver
IC 801
Motor Driver
RMC
801
Megalogic
Euro-AV
Voltage-
Control
(opt. 16:9)
IC 2501
AV
SWITCH SELECT
OR (36 Pin)
2-Audio-
Heads
Power Supply
Shuttle SW
DRUM- u.LOADING MOTOR
IC 5301
14;20;30;36;51
ATR ENV IN
IC 5301 (20 Pin)
M12V/20V
24
FV
-Pulse
POWER FAIL
24
78
50
5
23
V-H.SW
.P
Head-Amplifier
Head-Select
A-H.SW.P
26
CAPSTAN UNIT
74;75
I2C
I2C-Bus
Interface
17; 18
Seriell Bus
Interface
56; 57
2 / 4 V
ideo-
Heads
PAL
MESECAM
NTSC
62; 63
Logic
MPX_DET
FM-Demod.
I2C
Logic
I2C
8 (AGC)
8
10
8
(RF Video In)
4
9
5
7
9
1; 2
3;5
10
4/5
18
LINE 2
30
19
18
23
36
FRONT IN
8
TUNER IN
AUX IN
AUX_AUDIO
14
5
AUDIO OUT
3
29
28
20
1
7
35
R2529
R2820
R2813
11
54
48
2
58
33
56
A_OUT.R
A_OUT.L
52
61
30
31
R2513
Modulator
6
57
R2514
TUNER_VIDEO
20
20
19
19
25; 26
R6322
R6320
(R)
(L)
6
2
Tuner R-CH
Tuner L-CH
53
IO-Selector
Head-
Amplifier
1
3
1
3
6
2
44
6
OSD_VIDEO_2V
Stereo
Stereo
OSD_VIDEO_1V
Euro-A
V 2
(Decoder)
E1
E1
Front
84
PC9V
STBY 10,5V
10
17
STBY 5V
PC5V
61;57;90;96
60
PC5V
2,8V 95
13
2,4V
(BLANK)
4
12
69
AT5V
73
2,5V
Back Up 5V
Q703 /704
PC33V
STBY 5V
PC 9V
PC 5V
M12V
STBY-25V
REF
REF
AT5V
PC 5V
8
3
51
PC5V
OSD-
Processor
7(PC5V)
PC 5V 14
Q1601
3
STBY-25V
STBY5V
18
16
STBY 10,5V
STBY 10,5V
Mono only
81
51
31; 32
35
(100 Pin)
(64 Pin)
(100 Pin)
Q210
2; 4
50
CSYNC
Q305
11
EE (L)
Deck-Controller
Servo Processor
Q708
IC 702 (30 Pin)
Clock / Date
Timer
Ref.
Power Supply
Controller
I / O Control
Sync.Sep.
2
RF Audio In
(44 Pin)
54
73
4,43MHz
Q501
Sync.Sep.
99
62
STBY5V
REC-Mute
33
HI-FI CTL
20
A-Mute (H)
8
IC 701/26
32
FSC
PDC_VIDEO
17
FM-(De-)
Modulator
79
98
REC Y+C-OUT
PB C-OUT
ENV.
DET.
IC1901 (S- IF 5,74MHz)
IC1951 (Decoder, Matrix)
IC1701 (Demod.+Decoder)
IC1702 (Amplifier)
A2:
NICAM / A2:
VIDEO
OUT
Audio I/O
Video I/O
Q1605
Q1612
CF1601
Trap
11
RJ205
Q1615
Tuner
18
+
C
Y
Chroma
Luminanz
Sub Carrier
L
R
L
R
L
R
L
R
+5V
SAT_
REMOTE
7
SF
1602
SF
1601/3
CF1607/9)
13
Stereo Decoder Module:
16; 4 (PC33V)
AFT_S-Curve
P1501
2
PLL DEMOD.
1
4
3
2
SAT_REMOTE
Q7801
13
SAT_OUT
FULL_ERASE_CTL (Pin 63)
A_ERASE_BIAS_CTL (Pin 29)
Erase
Oscil.
FM-Audio
16
Q2903
R; G; B
29
63 (DUB)
76
PB_CTL_OUT
P201
Auto-
Track.
STBY+CTL
Port
(AV1 CTL)
Stereo
16
Q205
Mechanism-Sensors
ROM
Video/Chroma/Audio
Vidéo/Chroma/Audio
S. / P.
IC201
4-26
IC202
4-26
IC651
4-25
IC701
4-22
IC702
4-21
IC703
4-22
IC704
4-22
IC705
4-22
IC801
4-21
IC901
4-28
IC902
4-28
IC1601
4-33
IC1602
4-29
IC1701
4-36
IC1801
4-22
IC1901
4-35
IC1951
4-35
IC2501
4-24
IC5301
4-31
IC6301
4-24
RMC801 4-21
Tuner
4-30
