Service manual

107
26. RA-6 Video Circuit Troubleshooting
84
83 48
Y
C
37,38,39
33
34
35
22,23,24
Y P
B
P
R
Y P
B
P
R
CXA2103-1
SCON,SCOL,SHUE
(ADJUST RF,VIDEO,& DVD
IC303
YCT-MAIN
CXA2103
Y
P
B
P
R
Y/CV C
Y
C
IO6
PD6482
3D-COMB
MAIN
CV : 0.9Vp-p
Y : 0.7Vp-p
C :
0.5V
Y : 0.9V
C : 0.5V
Y : O.7V
P
B
: 0.5Vp-p
P
R :
0.5Vp-p
Y : 1.2V
P
B
: 1.1Vp-p
P
R :
1.1Vp-p
BUF
(MAIN) 480i
(RF, V 1-6)
1,3,13
15
4
14
Y
P
B
P
R
2,5,12
9 10 11
SELECT
PINS
Y P
B
P
R
Y : 1.1V
P
B
: 1.0Vp-p
P
R :
1.0Vp-p
IC3090 PIN 9
L: 2,5,12
M : 1,3,13
[MAIN] 480i
(V5,6) DVD
22,23,24
Y P
B
P
R
Y : 1.1V
P
B
: 1.0Vp-p
P
R :
1.0Vp-p
[SUB]
480i
(RF,
V1-4)
[MAIN] 480i(RF,V1-6)
[SUB] @ MAIN=1080i/480P
Y
IN
C IN
CXA2103-2
SCON,SCOL, SHUE
(ADJUST RF & VIDEO)
46
48
IC301
YCT-SUB
CXA2103
3
2
1
33
34
35
41
42
43
27
28
25Y : O.5V
P
B
: 0.5Vp-p
P
R :
0.5Vp-p
Y
P
B
P
R
Y
P
B
P
R
Y
P
B
P
R
IC306
COMP.
SW.
CXA2151
Y : O.7V
P
B
: 0.5Vp-p
P
R :
0.5Vp-p
A19 Y
C16 B-Y
A17 R-Y
Y
P
B
P
R
C20 Y
C22 B-Y
C21 R-Y
88 96
IC2004
A/V
SW.
[MAIN] 1080i/480P (V5,6)
[SUB] 480i (RF, V1-4)
[MAIN] 1080i
480P,(V5,6)
Y : 0.8Vp-p
(RF)
Y : 0.8Vp-p
(V1-4)
Y : 0.4Vp-p
(RF)
Y : 0.5Vp-p
(V1-4)
Y
C
SUB
VIDEO
FROM
IC2004
A/V
SW.
VIDEO
5/6
COMPONENT
TO B
BD.
DRC
TO B
BD.
MID
IC305
YUV SW.
SN74LV4053
46
A BOARD
FIGURE 26-3 - ANALOG VIDEO PROCESSING RA-6 CHASSIS
26.3TVP14 1475 6/13/02