VL-SDPOU
3. COM-Amplitude adjustment
1
Test
ooint
1
TL804
Address VCR ADJ
29
Mode
CAM
Procedure
1) Set TL800 to GND.
2) Adjust the output voltage of TL804 with the address 29
and
the
DC voltage
with
a
digital voltmeter
to the
adjustment standard value.
Adjustment
6.55
V f 50m V
ratina
I
I Examoles
I
I
4. COM-Bias adjustment
Test
point
LCD panel daisplay area
Address
VCR ADJ 33
Mode
VCR AV input
Input Signal
40% White
(or
gray scale)
signal
Procedure 1) Input white 40% signal
as
AV input.
2) Set
the
illuminometer (TOPCON IM-3)
on the
LCD
panel surface.
(Shut
off the
external
light.)
3) Minimize the ripple of output waveform of illuminometer.
Response time
:
0.6 sec.
Adjustment Minimum
rating
Set the point to
make the black portion blackest.
Examples
l
During IC702 (E*PROM) replacement.
l
During circuit board (MAIN) replacement.
l
Durina LCD oanel reolacement.
5. White Balance adjustment
Test point LCD panel daisplay area
Address VCR ADJ 84 (R), VCR ADJ 86 (6)
Mode
VCR AV input
Procedure 1) Feed 40% white signal to the AV input jacks and the standard monitor.
2) Set the Color luminance meter (TOPCON BM-5) on the LCD panel surface.
(Shut off the external light.)
3) Adjust the VCR ADJ addresses 84 and
86 until it became the same as that of the standard monitor.
Adjustment Set of the atandard W=VF-HL3-136
rating
Set of the limit R=VF-HLl-048 G=VF-HLl-050 B=VF-HLl-052
Remark Make this adjustment after 5-minute or longer aging.
Examples
l
During IC702 (E2PROM) replacement.
l
During circuit board (MAIN) replacement.
l During LCD panel replacement.
10-10
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