G2 (Screen) And White Balance Adjustments - Sony TRINITRON KV-27XBR351 Service Manual

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a.
AN ITEM OF ADJUSTMENT
R E F E R E N C E
NAME
DATA
19
GAMP
VP GREEN AMP.
VP BLUE AMP.
BAMP
9
GCUT
8
V P
BCUT
6
V P
SBRT
40
V P B R I G H T
b . METHOD OF CANCELLATION FROM SERVICE
MODE
Set the standby condition (Pressmlbutton
the commander) in the next place, press (POWER\
button again, hereupon it becomes TV mode.
1) Set to Service Mode.
2) Press m (UP) and i (DOWN), select an item of
adjustments.
3) Pressm]button indicate WRITE
(
R
on screen.
4) Press(ENTERlbutton
to write for memory.
1) After adjustment, pull out the plug from AC
outlet, and next place, plug in AC outlet again.
2) Turn the power switch ON and set to Service
Mode.
3) Call the adjusted items again, confirm they were
adjusted.
ITEM \
19'
SERVICE &MP
REGISTER
GREEN CUT OFF.
BLUE CUT OFF
on
E
D
)
METHOD
3-4. G2 (SCREEN) AND WHITE BALANCE
ADJUSTMENTS
1. G 2 (SCREEN) ADJUSTMENT(RV 701)
1) Set the PICTURE and BRIGHTNESS to normal.
2) Confirm G 1 voltage is within 30.0 + 5 V.
3) Apply DC voltage of 180 V to the cathodes of R,G
and B from DC stabilized power source.
4) While watching the picture, adjust the G2 control
(RV 701) to the just the retrace line disappears.
(Using the Remote Commander)
2. WHITE BALANCE ADJUSTMENTS
1)
Set to service mode.
2) Press STANDARD to normal and if necessaries
"TRINITONE" set to "LOW" by
3)
Input an entire white signal.
4)
Set the PICTURE to minimum.
5)
Select S BRT with a and 1, and then set the level
to minimum with wand H
6) Select G CUT and B CUT withaanda.
And adjust the level with B and 1 for the best
white
balance.
7) Set the PICTURE to maximum.
8) Select G AMP and B AMP with 1 and H and
adjust the level with H and m for the best white
balance.
9) Write into the memory by pressing\-+
3. SUB BRIGHT ADJUSTMENT
1) Set to service mode.
2) Input a staircase signal of black and white from
the
pattern
generator.
3) BRIGHTNESS *a- RESET
PICTURE -****-***
minimum
4) Select 'SBRT with m and M , and adjust SUB
BRIGIIT level with m and m so that the stripe
second from the right is dimly lit.
white
q
orm .
second
from
the
right

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