JVC AV-27F577/R Service Manual page 27

4.8.4 VIDEO CIRCUIT [2.TV-Micro Service]
Measuring
Item
instrument
WHITE Signal
BALANCE generator
(LOW LIGHT)
Remote
control unit
REMOTE CONTROL UNIT
H.LINE ON
1 2
H.LINE OFF
4 5
G CUTOFF R CUTOFF
7 8
G CUTOFF R CUTOFF
TUNE 0
WHITE Signal
BALANCE generator
(HIGH LIGHT)
Remote
control unit
REMOTE CONTROL UNIT
R DRIVE
1 2
R DRIVE
4 5
7 8
TUNE 0
Test point Adjustment part
[1.Adjust]
S01: BRIGHT
S11: R CUTOFF
S12: G CUTOFF
S13: B CUTOFF
[2.White Blance]
SCREEN VR [in HVT]
3
6
B CUTOFF
9
B CUTOFF
RETURN+
[1.Adjust]
S14: R DRIVE
S15: B DRIVE
[2.White Blance]
B DRIVE
3
B DRIVE
6
9
RETURN+
Description
(1) Receive the black and white signal ( color off ).
(2) Set VIDEO STATUS to "STANDARD".
(3) Select COLOR TEMPERATURE to "LOW".
(4) Select the 2.TV-Micro Service from the SERVICE
MODE.
(5) Select the 1. Adjust.
(6) Set the initial setting value of < S11 > (R CUTOFF), < S12
> (G CUTOFF), < S13 > (B CUTOFF) and < S01 >
(BRIGHT).
(7) Return to the 2.TV-Micro Service MENU.
(8) Select the 2. White Balance.
(9) Display a single horizontal line by pressing the [1] key.
(10) Turn the SCREEN VR all the way to the left.
(11) Turn the SCREEN VR gradually to the right from the
left until either one of the red, blue or green colors
appears faintly.
(12) Adjust the two colors which did not appear until the
single horizontal line becomes white by using the [7]
to [0] keys, [TUNE] and [RETURN+].
(13) Turn the SCREEN VR until the single horizontal line
is displayed faintly.
(14) Press the [MUTING] key to memorize the set value.
(15) Press the [4] key to cancel the single horizontal line
mode.
(16) Adjust the BRIGHT level so that the black component
shines white slightly by the [VOL+] / [VOL-] key.
(17) Confirm that whether the color ingredient of R, G, or
B is visible to the black component, which shines
white slightly.
(18) When the color ingredient can be seen, two colors
other than a visible color are adjusted, and it is made
to look white.
(19) Press the [MUTING] key to memorize the set value.
• WHITE BALANCE(LOW LIGHT) adjustment should be
finished.
(1) Receive the black and white signal (color off).
(2) Set VIDEO STATUS to "STANDARD".
(3) Select COLOR TEMPERATURE to "LOW".
(4) Select the 2.TV-Micro Service from the SERVICE
MODE.
(5) Select the 1. Adjust.
(6) Set the initial setting value of < S14 > (R DRIVE) and
< S15 > (B DRIVE).
(7) Return to the 2.TV-Micro Service MENU.
(8) Select the 2. White Balance.
(9) Adjust the screen until it becomes white by using the
[2], [3], [5] and [6] keys.
(10) Press the [MUTING] key to memorize the set value.
(No.YA387)1-27