GRUNDIG Service
Xenaro – GDP 42…
3 - 12
M6
CVBS +
SVIDEO
SCAR
T
A
UDIO
TV SCART
VIDEO
SCAR
T
CONT
R
O
L
C-CB
Y-Y
CR_F
Y_F
CB_F
CVBS_F
CV1-CV
CV2-CR
CV2-CR
M1
TVFORMAT1
M1
V3.3
M1,2,3,4,5,7
SCARTAUDIOR
M7
SCARTAUDIOL
M7
SCART_BLANK
M1
Y-Y
M1
TVFORMAT0
M1
C-CB
M1
CV1-CV
M1
V5.0
M1,2,3,5
+12V
M1,5
SCARTIR
M1
IRCNTRL
M1
V5.0
V3.3
+12V
V3.3
V3.3
V3.3
V3.3
V3.3
V5.0
+12V
V3.3
FB2
R71
150R N/A
R286
22K
R280
330R
C354
1nF
C72
22pF
C57
22pF
FB4
R291
1M2
C62
22pF
C66
22pF
C71
220pF
R290
3.3K
C65
100pF
C364
1nF
R294
1K
Q17
BC547C
2
3
1
R69
150R N/A
1
3
2
VD1
Zetex ZC836A N/A
C59
220uF N/A
10V
L4
1uH
C360
22pF
R282
22K
D7
1N4148
1
2
C63
100pF
Q19
BC547C
2
3
1
L1
1uH
FB7
R292
1K
R289
100K
C81
100pF
C363
39nF
C82
22pF
D4
1N4148
1
2
R293
22K
C83
22pF
C84
220uF N/A
10V
D11
1N4148
1
2
FB54
R297
1K
D6
1N4148
1
2
C358
22pF
C70
22pF
FB5
L2
1uH
C53
220uF N/A
10V
C61
100pF
C73
330pF
Q16
BC547C
2
3
1
R70
150R N/A
R68
150R N/A
R287
75R
FB6
R296
22K
C68
22pF
R302
10K
Q21
BC557B
2
3
1
FB3
R285
22K
C355
1nF
R281
330R
C64
220uF N/A
10V
D10
1N4148
1
2
R288
10K
B
A
CK
P
A
NE
L
V
IE
W
J7
CONN SCART
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
AOR
AIR
AOL
AGND
BGND
AIL
B
SWITCH
GGND
CLKOUT
G
DATA
RGND
DATAGND
R
BLANK
VGND
BLNKGND
VOUT
VIN
SHIELD
L3
2.2uH
C58
22pF
D8
1N4148
1
2
R301
10K
C80
22pF
C356
22pF
D5
1N4148
1
2
D15
1N4148
1
2
Q18
BC547C
2
3
1
Q15
BC547C
2
3
1
4
3
2
5
ENTRY SIDE
(CHASSIS)
J6
CVBS + S-VIDEO
1
2
3
4
5
6
7
8
9
GND
GND
GND
Y
C
GND
CVBS
GND
GND
C67
100pF
R283
22K
D9
1N4148
1
2
C79
100pF
Q20
BC547C
2
3
1
TVFORMAT (1/0)
SWITCH VOLTAGE
FUNCTION
LOW / LOW
~11V
SWITCH TV TO SCART INPUT (CVBS) 4:3 ASPECT RATIO
LOW / HIGH
~6V
SWITCH TV TO SCART INPUT (CVBS) 16:9 ASPECT RATIO
HIGH / LOW
~0V
SWITCH TV TO DISPLAY INTERNAL SOURCE (SCART INPUT OFF)
HIGH / HIGH
~0V
SWITCH TV TO DISPLAY INTERNAL SOURCE (SCART INPUT OFF)
BLANKING SIGNAL
TV FUNCTION
HIGH (1-3V)
RGB ACTIVE
LOW (0V)
CVBS ACTIVE
16
17
18
19
Hauptplatte / Main Board – Video
(M6)
Reference
Block Diagrams .......... 3-2
Oscillograms .............. 3-3
Connection Overview 3-5
Main Board
– M1 ............................. 3-8
– M2 ............................ 3-9
– M3 ........................... 3-10
– M4 ........................... 3-10
– M5 ........................... 3-11
– M6 ........................... 3-12
– M7 ........................... 3-13
Power Supply ............. 3-15
Keyboard Control ....... 3-17