Sharp LC-R60HDU Service Manual page 33

No. Adjusting point
14 AD input
1. Input signal: 10-step lumi-
Reference
Green/black
level adjustment
2. Group: VIDEO-3
3. Subject: VBG
4. Test point: TP1443
5. Instrument: Oscilloscope
15 AD input
1. Input signal: 10-step lumi-
Reference
Blue/black level
adjustment
2. Group: VIDEO-5
3. Subject: VBB
4. Test point: TP1446
5. Instrument: Oscilloscope
16 Sample hold 1. Input signal:ITE pattern HD
Pulse phase
checking
SH-PHASE 2. Group: VIDEO-4
3. Subject: Sampling phase
4. Test point: Onscreen
5. Instrument: Visual
17 Horizontal Feed the HD signal for adjust-
center
ing the horizontal center.
1. Input signal: ITE pattern HD
2. Group: VIDEO-4
3. Subject: H-POS
4. Test point: Onscreen
5. Instrument: Visual
18 Vertical center
Feed the HD signal for
adjusting the vertical center.
1. Input signal: ITE pattern HD
2. Group: VIDEO-4
3. Subject: V-POS
4. Test point: Onscreen
5. Instrument: Visual
Adjusting conditions
nance HD signal
COMPONENT-1
TP1442
nance HD signal
COMPONENT-1
TP1445
signal
COMPONENT-1
adjustment
R-SMP
G-SMP
B-SMP
signal
COMPONENT-1
signal
COMPONENT-1
33
Adjusting procedure
» Get the waveforms at TP1443 and TP1442 over-
lapped on the oscilloscope screen. Adjust the
voltage at TP1442 to the video signal peak.
Black level ±0.05 V
» Get the waveforms at TP1446 and TP1445 over-
lapped on the oscilloscope screen. Adjust the
voltage at TP1445 to the video signal peak.
Black level ±0.05 V
» Using the [\ |] buttons on the remote controller,
adjust the settings so that character blurring, ghost
and ringing on the ITE pattern will be minimized.
» Using the [\ |] buttons on the remote controller,
adjust the setting so that the overscan is the same
for right and left.
» Using the [\ |] buttons on the remote controller,
adjust the setting so that the overscan is the same
for top and bottom.
LC-R60HDU
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