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