Hitachi C43-FD5000, Service Manual

Page: 18 / 123

18
SERVICE ADJUSTMENTS
2.7
VERTICAL SIZE ADJUSTMENT
Adjustment Preparation
(1) VIDEO control should be set to Factory Preset condition.
(2) DCU ROM CHECK should be completed.
(3) Place the set facing east.
Adjustment Procedure
PAL 100i MODE I
2
C No.13
(1) Input any PAL signal.
(2) Press [
MENU ] key.
(3) Choose FUNCTION and SCAN , and set to 100Hz mode.
(4) Press [ MENU ] key 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 V.SIZE (amplitude) item by using Handset up/down cursor key.
(8) Adjust V.SIZE (amplitude) as following by using Handset left/right cursor key.
So that the distance between the topmost horizontal line and the bottommost horizontal line of DCU’s
cross-hatch pattern is L.
(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 I
2
C No.17
(1) Input any PAL signal.
(2) Press [ MENU ] key.
(3) Choose FUNCTION and SCAN , and set to Progressive 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 I
2
C No.21
(1) Input any NTSC signal.
(2) Adjust the same items as (5)-(10) of setting PAL 100i MODE.
Unit: mm Tolerance:
±
5mm
L PAL 100i mode PAL 50p mode NTSC 60p mode
43” 525 525 560
50” 610 610 650
L
The distance between the topmost
horizontal line and the bottommost
horizontal line