Trapezoid Distortion Adjustment - Hitachi C43-FD5000 Service Manual

SERVICE ADJUSTMENTS
2.9

TRAPEZOID DISTORTION ADJUSTMENT

Adjustment Preparation
(1) VIDEO control should be set to Factory Preset condition.
(2) HORIZONTAL SIZE adjustment should be completed.
(3) Place the set facing east.
Adjustment Procedure
PAL 100i MODE
(1) Input any PAL signal.
(2) Press [MENU] key.
(3) Choose FUNCTION and SCAN, and set to 100i mode.
(4) Press [MENU] key twice to exit from FUNCTION.
(5) Press and hold the SERVICE ONLY SW. on CONV./FOCUS P.W.B. and [MUTE] key of Handset.
Green DCU cross-hatch are appeared with Conv. Data cleared.
(6) Press the input selector, 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 "MUTE" key of handset to write the data.
(10) After adjustment, press SERVICE ONLY SW. for exit from SERVICE mode.
PAL 50Hz PROGRESSIVE MODE
(1) Input any PAL signal.
(2) Press [MENU] key.
(3) Choose FUNCTION and SCAN, and set to 50P mode.
(4) Press [MENU] key to exit from FUNCTION.
(5) Adjust the same items as (5)-(10) of setting PAL 100i MODE.
NTSC 60Hz PROGRESSIVE MODE
(1) Input any NTSC signal.
(2) Adjust the same items as (5)-(10) of setting PAL 100i MODE.
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2
I C No.16
2
I C No.20
2
I C No.24
20
Vertical Screen frame line & edge
of vertical DCU cross-hatch line
should be parallel condition.