JVC AV-27D203/R, Service Manual

Page: 24 / 63

No.51940
AV-27D303
AV-27D203
23
ADJUSTMENT OF WHITE BALANCE
Item
Measuring
instrument
Test point Ad justment part Description
WHITE
BALANCE
(Low Light)
adjustment Signal
generator
R CUTOFF (S11)
G CUTOFF (S12)
B CUTOFF (S13)
BRIGHT(S01)
SCREEN VR
[ in HVT]
1. Receive the blac k and white signal ( color off ).
2. Select the [LOW LIGHT] MODE from the SERVICE MENU.
3. Set the initial setting value of “R CUTOFF”, “G CUTOFF”
“B CUTOFF” and BRIGHT.
1. Display a single horizontal line by pressing the
① ① ① ①
key of the
remote control unit.
5. Turn the screen VR all the way to the left.
6. Turn the screen VR gradually to the right from the left until
either one of the red, blue or green colors appears faintly.
7. Adjust the two colors which did not appear until the single
horizontal line that is displayed bec omes white using the ④
④ ④
④ to
⑨
⑨ ⑨
⑨
keys of the remote c ontrol unit.
8. Turn the screen VR until the single horizontal line is displayed
faintly.
9. Press the
②
② ②
②
key to cancel the single horizontal line mode.
10. Adjust the BRIGHT lev el to become the blac k c omponent
shines white slightly.
11. Confirm that whether the color ingredient of R,G,or B is visible
to the black component, which shines white slightly
12. When the color ingredient can be s een, two colors other than a
vis ible c olor are adjusted, and it is made to look white.
13. Return the value of BRIGHT to initial s etting value.
●
The
③ ③ ③ ③
EXIT key is the cancel key for the WHIT E BALANCE.
[LOW LIGHT]
BRIGHT
***
***
***
1 2 3
6
9 8 7
5 4
RE M OTE CONTRO L UNIT
H.LINE ON EXIT H.LINE OFF
R CUTOFF B CUTOFF G CUTOFF
R CUTOFF B CUTOFF G CUTOFF
No Setting item
Variable
range
Initial setting
value
S11 R CUT OFF 0
～
255 50
S12 G CUT OFF
0 ～ 255
50
S13 B CUT OFF
0
～
255
50
S01 BRIGHT
0 ～ 127
64