Rgb Su B Bright & Sub' Contrast Adjustment - Panasonic PT-M1083U Service Manual

Crt projector shassis s4
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15. Press the STORE
button
twice on the remote control.
16. Adjust the RASTER SIZE on the remote control so that
the
vertical
size is 1736mm.
17. Confirm that the DAC value of
vertical
is 160 ::t 10.
18. Adjust the RASTER SIZE on it SO that the horizontal
size is 2314mm.
Confirm
that the DAC
value
of
horizontal ;s 128 :t 50.
19. Press the STORE
button
1Wice on it.
20. Remove the lens
caps
from the red and blue lenses.
<RED CONVERGENCE ADJ.>
21. Adjust red convergence by pressing the buttons
on the
remote controller in the order
as shown In Fig. 17
below.
22. Press the ZONE
button
on the remote control.
23. Adjust
zone
convergence
by using
ZONE 1 to ZONE
21.
24. When 1 span in the left end of
vertical
line can not be
adjusted
by all means,
adjust R4377 and R4381 on the
V.P.C.8oard.
<BLUE CONVERGENCE ADJ.>
25. Do the same
adjustment as red convergence
adjustment described
on Steps 21 to 23.
26. When 1 span in the lell end of
vertical
line can not be
adjusted by all means. adjust R4379 on the v-
P.C.8oard.
.7~~::\~:4 ::-. U .
~ ~
Note:
1. Confirm
that the skew (V) DAC values of the red,
blue and green
picture segments are 128 :t 10.
" they are beyond the said numerical value.
readjust inclination of DV.
2. Confirm that differences between the red, blue and
green segments and DAC values of ZONEs 10 - 21
do not
exceed
128 :t 50.
If they
are beyond
the said
value.
readjust
convergence.
3. Confirm that differences between the red, blue and
green segments
and DAC values
of ZONEs
18
-
21
do not.
27. Press the STORE button twice on it.
RGB
SUB
BRIGHT
& SUB
CONTRAST
.-
....-..-..-
ADJUSTMENT
(L Y/LC-P.C.Board)
1. EQUIPMENT TO BE USED
Digital Voltmeter
Oscilloscope
Programmable Signal Generator
2. INITIAL CONDITION (on screen value)
BRJGHT
"""""'"
128
CONTRAST
MAX
3. ADJUSTMENT PROCEDURE
1. Input a crosshatch
pattern signal (fH;;;31.5kHz,
N=60Hz) to RGBIN 1.
2. Connect a digital
voltmeter between TPLC11 (+) and
TPLC10 (-).
3. Connect an
oscilloscope
to TPLC7 and GND.
Programable
R
SIgnal Generator
G
RGB IN 1 B
C=:J
H
V
Digital Voltmeter
LC-P.C.Borad
I
I
TPlC11
+
TPLC10
-
Oscilloscope
TPLC7
: rn
Chassis
ground
Fig. 18
~
"'.,.

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