Sharp VL-SW50U Service Manual page 51

VL-swsou .
3. B-W/B adjustment
Measuring point TL817 (G-OUT) TL818 (B-OUT)
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1 Address
142
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1 Mode
1
VCR AV input
Adjusting method l)AV input: Nonsignal.
2) TL817 (G-OUT): Oscilloscope CHI
3) TL818 (B-OUT): Oscilloscope CH2
4)Adjust P-P of TL818 become bigger O.lV than TL817.
Adjustment standard + 0.1 Vp-p
j Remarks
4. VCO adjustment
Measuring point
Address
TL808
43
Mode
1
VCR AV input
Adjusting method l)AV input : NON Signal
2)Connect the frequency counter to TL808, and adjust the frequency.
1 Adjustment standard
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15734kHz + 1 OOHz
j Remarks
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5. H-position adjustment
1 Measuring point
1 Add ress
Mode
TL808
44
.VCR AV input
Adjusting method 1) Input the white 100% signal as an AV input.
2)Connect the oscilloscope to TL808; and adjust the pulse width.
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Adjustment standard 3.4psec + 0.1 Spec
Remarks
6. COMMON PULSE adjustment
Measuring point TL821
Address 22
Mode
VCR AV input
Adjusting method l)Set the data of address 47 at the address 80.
2) Input the white 100% signal as an
AV
input.
3)Connect the oscilloscope to TL821
p
and adjust the pulse width.
Adjustment standard 6.6 Vp-p
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Remarks
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7. COM-BIAS adjustment
Measurina point LCD panel display surface
45
VCR AV
input
Address
Mode
Adjusting method 1)lnput the white 40% signal as an AV input, and set data of address 47 at the address 80.
2)Set the illuminometer (TOPCON IM-3) on the LCD panel surface (do not allow entry of external
light).
3) Connect the illuminometer to the oscilloscope.
4)Make an adjustment so as to minimize the ripple of output waveform.
Response time: 0.6 set
5) Adjust again if longitudinal stripe appears evidently.
* Or set to the point where the black is settled deepest with the grey scale signal.
Minimum 'Adjustment standard
Remarks Make an adjustment after aging for 5 minutes or more.
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