Drive Adjustment - Toshiba 3787DB Service Manual

ITEM ADJUSTMENT PROCEDURE
WHITE BALANCE 1. Set Contrast to 40, and brightness to +20 by picture control.
ADJUSTMENT 2. Set the TV in service mode, and get the inside W/B adjusting signal with VIDEO
button.
3. Select RCUT, GCUT and BCUT with CHANNEL A, Y buttons, to set individual
values to Initial reference data, and to set GDRV and BDRV to Initial reference
data with VOLUME 1 — /+ buttons.
4. Press[-/- -] button on the remote control and rotate Screen VR to get one slight
horizontal line on screen.
Note: Every pressing ofL/- -] button provides Horizontal line picture and Normal
picture alternately.
5. Press button to release horizontal line picture, and select the two other colors
which did not light in the above step with CHANNEL A, Y buttons. Then tap VOL-
UME J —/+ buttons so that three colors slightly light in the same level.
@ CUTOFF ADJUSTMENT
(RCUT)
(GCUT)
(BCUT)
@ DRIVE ADJUSTMENT
(GDRV)
(BDRV)
* To correct white balance in light area,
select GDRV and BDRV with CHANNEL
A, ¥ buttons to adjust.
% To correct white balance in dark area,
perform fine adjustment of RCUT, GCUT
and BCUT.
Light area check
(to show white)
Dark area check
(to show black)
= ]f-—