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KV-27EXR20/27EXR25
RM-Y103
RM-Y104
(4) Screen-corner Convergence
a-d: screen-corner
misconvergence
Affix a Permalloy
ass'y corresponding to the
misconverged areas.
d
Permalloy assembly
3-3. FOCUS
1. 'Tune in an off-air signal.
2. PICTURE control to 80%.
3.
Adjust
the focus VR
on A board
so that the
focus at the center of the screen is optimum.
A magenta ring will appear if the focus is
adjusted only in the center of the screen.
Adjust evenly throughout the entire screen.
_
FOCUS
3-4. G2 (SCREEN) AND WHITE
BALANCE
ADJUSTMENTS
1. G2 (SCREEN) ADJUSTMENT(RV701)
Set the PICTURE and BRIGHTNESS
to normal.
Confirm G1 voltage is within 30.0+5V.
Apply DC voltage of 180V to the cathodes of R,
G and B from DC stabilized power source.
While watching the picture, adjust the G2 control
(RV701) to the just the retrace line disappears.
(Using the Remote Commander)
2. WHITE
BALANCE
ADJUSTMENTS
1)
2)
3)
4)
5)
6)
9)
1)
2)
3)
4)
Set to service mode.
Press
[VIDEO
|—
[RESET]
to
normal
and
if
"TRINITONE"
set to "LOW"
by [+
necessaries
or [=] .
Input an entire white signal.
Set the PICTURE to minimum.
Select
S BRT
with /1| and |4] , and then set the
level to minimum with |3] and ie}
Select G CUT and B CUT with[l|and [4].
And adjust the level with |3) and (6 for the best
white balance.
Set the PICTURE to maximum.
Select
G AMP
and B AMP
with 1 and 4, and
adjust the level with |3| and ig] for the best white
balance.
Write into the memory by pressing |MUTING|—
then
3. SUB BRIGHT ADJUSTMENT
Set to service mode.
Input a staircase signal of black and white from
the pattern generator.
BRIGHTNESS --- RESET
PICTURE
-:::--+-
minimum
Select S BRT with [i] and [4] , and adjust SUB
BRIGHT level with [3] and [6] so that the stripe
second from the right is dimly lit.
white
— 20—
second
from
the
right
f
black
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