Kenwood KVT-915DVD Service Manual page 26

KVT-915DVD,925DVD,935DVD
KVT-945DVD,965DVD
QQ
3 7 63 1515 0
Item
3-3. GAMMER0
VR408 (X14-947) 2. Adjust GAMMER0 (VR408) so that 5th step from the pedestal is 1.3V±0.05V.
3-4. BRIGHT
VR404 (X14-947) 2. Adjust BRIGHT (VR404) so the 3step from the pedestal are 2.0V±0.05V.
CAUTION : At the beginning turn VR404 [BRIGHT] fully to the clockwise.
3-5. GAMMER2
VR407 (X14-947) 2. Adjust GAMMER2 (VR407) so that 6step from the pedestal is 3.4V±0.05V.
TE
L 13942296513
3. Adjust BRIGHT adjustment VR404 so that 1step from the pedestal is 0.8V±0.05V.
CAUTION : At the beginning turn VR404 [BRIGHT] fully to the clockwise.
3-6. CONTRAST
VR401 (X14-947) 2. Adjust CONTRAST (VR401) so that 9step from the pedestal is 2.9V±0.05V.
3-7. R sub BRIGHT
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VR406 (X14-947) 2. Adjust R sub BRIGHT (VR406) so that VR and VG pedestal signal is same level
.
26
ADJUSTMENT
Adjustment method / Adjustment value
1. Connect the oscilloscope to TP272 between GND line.
3.4V
1. Connect the oscilloscope to TP272 between GND line.
After that volume adjustment are counterclockwise.
3.4V
1. Connect the oscilloscope to TP272 between GND line.
3.4V
3.4V
After that volume adjustment are counterclockwise.
1. Connect the oscilloscope to TP272 between GND line.
3.4V
1. Connect the oscilloscope to TP272 and TP272 between GND line.
x ao
y
(level difference±0.1V).
i
8
1.3V±0.05V
2.0V±0.05V
Q Q
3 6 7 1 3
3.4V±0.05V
0.8V±0.05V
2.9V±0.05V
u163
.
2 9 9 4 2 8
Conditions
• Input : AV1
• Input signal : 10step signal
(NTSC composite video
signal)
• Oscilloscope : 0.5V/DIV AC
1 5 0 5 8 2 9 9 4
m
co
9 9
2 8 9 9