Trapezoid Distortion Adjustment - Hitachi C47-WD8000 Service Manual

SERVICE ADJUSTMENTS

2.9 TRAPEZOID DISTORTION ADJUSTMENT

Adjustment Preparation
(1) PICTURE control should be set Factory Preset condition.
(2) DCU ROM CHECK should be finished.
(3) Place the set facing east.
Adjustment Procedure
2
PAL 100i MODE I C No.24
(1) Input PAL signal.
(2) Press [MENU] key.
(3) Choose [FUNCTION] and [SCAN MODE], set to [100Hz] mode.
(4) Press [MENU] key to exit from [FUNCTION].
(5) Press and hold the SERVICE ONLY switch on SIGNAL P.W.B. and [MUTE] key of handset.
DCU cross-hatch is appeared with Conv. Data cleared.
(6) Press the [TV/VIDEO] key on the side control panel, then SERVICE MENU appears.
(7) Choose TRAPEZOID item by using handset up/down cursor key.
(8) Adjust TRAPEZOID as following by using handset left/right cursor key.
(9) Press [ENTER] key of handset to write the data.
(10) After adjustment, press SERVICE ONLY switch to exit from SERVICE mode.
2
PAL 50p MODE I C No.28
(1) Input PAL signal.
(2) Press [MENU] key.
(3) Choose [FUNCTION] and [SCAN MODE], set to or [PROGRESSIVE] mode (50P mode).
(4) Press [MENU] key to exit from [FUNCTION].
(5) Adjust the same items as (5)-(10) of setting PAL 100i mode.
2
NTSC 60p MODE I
(1) Input NTSC signal.
(2) Adjust the same items as (5)-(10) of setting PAL 100i mode.
PAL HD MODE(16:9 Model only)
(1) Input PAL HD signal (1080i/50).
(2) Press [MENU] key.
(3) Choose [FUNCTION] and [SCAN MODE], set to HD mode.
(4) Press [MENU] key to exit from [FUNCTION].
(5) Set PAL HD mode setting procedure of PAL HD mode.
(6) Adjust the same items as (5)-(10) of setting PAL 100i mode.
C No.32
2
I C No.36
Vertical Screen frame line & edge of vertical
DCU cross-hatch line should be parallel con-
dition.
38