Service manual

GV 30…, GV 50… Platinenabbildungen und Schaltpläne / Layout of PCBs and Circuit Diagrams GRUNDIG Service 4 - 3 Blockschaltplan / Block Circuit Diagram – Digital
D5101
D5013
IC511
REMOCON
PS LED L
Display
Keys
Remote
Control
RC
POWER DOWN
POWER
CTL
Clock / Date
Timer
Tuning - & System Control, Show View
Megalogic 16/9 Dedection / Autostart
Key 0…3
IC301
5
26
36; 42
80
25
10
+13V
40
41
37
38
RR371
96
AV CTL
8
SWD (PS)12V
Q8651/Q8652
SEG a…p (Anoden)
GRID 1…9 G
D5102
PW-A
Back Up
Display Driver (IC371)
Keyboard Scan
ALWAYS 5V (FL)
FLD DATA IN
FLD DATA OUT
FLD CLK
25
18
24
23
15
16
14
27
22
FLD CS
ca. 6V
Q5120
9
M
MECHANISM
MODE
SWITCH
11
12
8
Cassette-Lift
SAFETY / FL SW
D3512D3511
D3510
89
88
3
4 Q3031
Q3030
PC352
PC351
TAPE END
TAPE START
SUPPLY
TAKE OFF
75
74
C-FG
MC-PWM/C-VS33
68
67
FG OUT
D-FG
PG
Drum Frequence Generator
Phase Generator
65
66
CTL+
CTL-
20 MC-F/R
(Motor Control - Forwards = L / Reverse = H)
34
Drum Control Voltage
MH-PWM/D-VS
VLOCK P / QVD
RF SW P
VD ENV (Autotrack)
YCA MUTE (H)
73
51
ALWAYS 5V (1)
ALWAYS 5V (2)
I
2
C-Bus
VA-A
Mechanism
18
50
49
47
D1001
TB-1
17
8
FSS IN
LO-MOTOR -
7
6
(ML-S)
LO-MOTOR +
CTL Head
(ML-D)
Y / C & Audio Processor
With Y-CCD and C-CCD,
Input Output Selrcter
Headamplifier Video & Audio
IC101
S3501
S3500
85
99
60
23
24
Drum Servo Head Pulse Supply
Capstan Motor
DATA
CLK
SWD (PS)13V; SWD 5V
SWD (PS)13V
Loading Motor
Driver
IC302
CN352
CN201
CN350
CN351
D5125
D5120
D5118
93
10
11
Q1007
FSC
66
Q1006
CCD
49
24
23
26
29
PB ENV (FM)
VD
(TO MCOM)
VD-OUT
81
REC H
30
62
74
SWD 5V
Capstan Servo
2
10
3
4
1
H AMP SW
Q8605
44
16
16
VD OUT (AV)
Q1302
Q1301
VD OUT (Modulator/AV)
98
ROTARY
(NP= L / LP= H)
(Video-Head Switch Pulse)
94100
ENV SW
(only for 4 Head)
(Combfilter, Phase Shifter)
TP 182
TP 183
without IC861
TC-A
IC141
VPS / PDC
VD (TO MCOM)
Q1401
TV-A
direction
speed
MC-A
Audio-
I
2
C-Bus
AF ENV84
57
56
TN DATA
TN CLK
HIFI only
8
9
R3001
CVBS
(2Vpp)
OSD &
Sync-
Generator
54
FSC
(Subcarrier 4.43MHz; 2.5V DC; 300mVpp)
LPSTBY (1Vpp)
LPSTBY (5Vpp)
(3-4V DC)
(L / PWM 55kHz / H)
(780Hz; 1Vpp)
(620Hz; 5Vpp)
(L; PWM 55kHz)
(25Hz; 5Vpp)
Drum
Motor
Q2304/
Q2305
91
NORM A CTL
(H = Audio REC+ Bias)
SWD 5V
SWD 5V
3
2
3
5
SDA
SCL
12
11
AFT C
SWD 5V
SWD (PS) 5V
SWD (PS) 5V
SWD (PS) 12V
SWD (PS) 12V
42
43
1
2
28
30
ALWAYS
5V (1)
(Record = H / PB = L) + Full Erase Head in DUB models only
SWD (PS) -23V
16
(Stop: 2,5V active: L / H)
(Stop: 4-5V active: 2,5V)
7
ca. 6V
ref.
D5119
ALWAYS 5V (FL)
16
40
58
87
SWD 5V (AD)
75
Audio
83
AFT C
(1,5 - 2,5V)
45
FSC (Audio Referenz)
12k
8.2k
R; G; B
(only 4 Head)
AF SW P
(only for HiFi)
30
AF SW P
27
IC304
RESET
C3078
Power Supply
Control
Start & Lock Switch
(only 4 Head)
FM-Sound
Detection
LP/STBY: 5V (DC)
LP/STBY: 0,5V (DC)
0V= Normal Sound, 4V= FM-Audio
1,5V
0V
3,5V
5V (Features, Mute)
0…3V NP
2…5V LP
19TV REMOCON OFF
8P IN REMOCON
94
MEGALOGIC OUT
MEGALOGIC IN
2
10
MEGALOGIC
SWD (PS)13V
PB L
AV1 SYNC
SWD 5V
LPF
Ampl.
Sieb
AUTO START
VD
(TO MCON1)
IC 307
Q3107/Q3108
1
7
3
VD
(TO MCON2)
Q1010
1Vpp
58
(only for 1 EURO-AV)
IC861
Video & Audio
I / O-Interface
(only for
EURO-AV2)
26
25
12
4
TB-1
SCL
TU601
Tuner
Modulator
Video-Demod.
Sound IF Demod.
FM-Demod.
Testpattern
EEPROM
IC305
Q1303
Q1008
2
20
14
10
15
SAT-
CTRL
13
SAT OUT
AV1 SYNC
Euro-AV 1
Euro-AV 2
Audio-Head Switch Pulse
Capstan Control Voltage
Capstan Frequency Generator
Mechanism Control
QSOUND
19
20
1
2
Power Supply Control
(VA-A)
(VA-A)
56
2
1
3
4
6
2
7/3
4
2
1
AD-6
7
8
9
10
45
43
78
35
Q SOUND SUPER
V STEREO H
AD MUTE
Q SOUND H
!
36
Stereo-
decoder
TN-3
(A2)
TN-6
(A2+NICAM)
BPF
AD-A
FM- Audio
IC231
8
32
HANPA/ZENPA
Sound Control
Normal Speed / Fast Winding
CN261
CN681