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KV-X297
I
Y FILTER ADJUSTMENT I
.1. Input a PAL RED pattern.
2. Connect an oscilloscope to pin
CD
of CN0403
(R
OUT) on C board.
3. Enter into service mode and press 3,8.
4. Adjust data by
6.
or \l
to
minimize the chroma
element at CN0403 pin
CD.
I
SUB BRIGHTNESS ADJUSTMENT
I
l.
Input a Phillips pattern.
2. Enter into service mode and press 23.
3. Adjust data so that O-IRE of grey scale and
CUT-OFF 20-IRE are only slightly visible on screen.
[ SUB CONTRAST ADJUSTMENT
I
I.
Input a video that contains a small 100% area on
a Black Background.
2. Enter into service mode and press 0 [
to
have
PIC max followed by 21.
3. Connect oscilloscope to pin
CD
of CN0403
(R
OUT)
and adjust data to obtain 2.5Vp-p.
I
SUB COLOR ADJUSTMENT
I
l.
Input a PAL color bar signal.
2. Connect an osciIloscope to pin
Q)
at' CN0403
(B OUT) on the C board.
3. Enter into service mode and press 22 of
CXA1587, S SUB COLOR.
4. Adjust data so that the right sides of the waveform
are set
to
the same level.
I STEREO-SEPARATION ADJUSTMENT I
1.
Input a 1kHz stereo signal to the L-ch and a 400Hz
stereo signal to the R-ch.
')
Enter into service mode and press 19.
3. Adjust data so that sound is not detected in the
Right-ch and the Left-ch.
I
DRIVE AND CUT-OFF I
See direct test mode list attached and refer to sub
brightness or such for adjustment method.
I
I
\
'----.J
-In·_. . · . .
II II
B-OUT WAVEFORM
SAME LEVEL
- 3 4 -
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