Kenwood KVT-915DVD Service Manual page 27

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Item
3-8. R sub
CONTRAST
VR402 (X14-947)
3-9. B sub BRIGHT
VR409 (X14-947)
3-10. B sub
CONTRAST
VR403 (X14-947)
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4. VCOM amplitude
VR400 (X14-947)
5. Flicker
VR203 (X35-428)
6. DVD VIDEO OUT
LEVEL
VR700 (X14-947)
Note : When the LCD ASSY or the touch panel switch ASSY is replaced, X14- and X35- Circuit, Touch panel and Start position is adjusted together
for test mode.
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ADJUSTMENT
Adjustment method / Adjustment value
1. Connect the oscilloscope to TP272 and TP272 between GND line.
2. Adjust R sub CONTRAST (VR402) so that VR and VG 10step signal is same level
(level difference±0.1V).
1. Connect the oscilloscope to TP272 and TP273 between GND line.
2. Adjust B sub BRIGHT (VR409) so that VB and VG pedestal signal is same level
(level difference±0.1V).
1. Connect the oscilloscope to TP272 and TP273 between GND line.
2. Adjust B sub CONTRAST (VR403) so that VB and VG 10step signal is same level
(level difference±0.1V).
1. Connect the oscilloscope to TP316A (X35-428) between GND line.
2. Adjust VCOM (VR400) so that amplitude level is 6.73V±0.05V.
1. Confirm there is no flickering (display mode : zoom).
2. If the flickering is recognized, adjust VR203 so that the flicker level will be the
minimum.
1. Connect the oscilloscope to video output terminal for hideaway unit (video output is
75Ω resistor termination to GND).
2. Adjust VIDEO (VR700) so that amplitude level is 1.0Vp-p±0.05V when play for test
disc for 100% white raster.
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KVT-915DVD,925DVD,935DVD
KVT-945DVD,965DVD
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Conditions
• Input : AV1
• Input signal : 10step signal
(NTSC composite video
signal)
• Oscilloscope : 0.5V/DIV AC
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• Input : AV1
• Input signal : 10step signal
(NTSC composite video
signal)
• Oscilloscope : 1.0V/DIV AC
• Input : AV1
• Input signal : Gray
(30~50% white)
• Display mode : Zoom
• Input : DVD
• Input signal : White 100%,
Gray (30~50% white)
• Display mode : Zoom
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