Hitachi C43-FD5000 Service Manual page 37

SERVICE ADJUSTMENTS
※ COMPONENT INPUT (input Y signal to "Y" terminal of AV1& insert a connector without signal to the
"P
R"
terminal of AV1)should be used in order to reduce digital noise.
Use signal without color burst. If it is not possible, use PAL signal and turn off comb filter in User Menu.
※
(5) BLUE defocus adjustment should be finished.
(6) The vertical incident illumination on the screen should be 20 lux or less.
Adjustment procedure
A) High Light W/B adjustment:
(1) Receive signal for High Light white balance adjustment.
(2) Adjust the white balance to 14000K+0MPCD (X, Y) = (0.266,0.270) at the screen center by using JIG R/C.
Use item No. 45 (R DRV) to adjust X, item No. 46 (G DRV) to adjust Y.
B) Low Light W/B adjustment
(1) Receive signal for Low Light white balance adjustment.
(2) Adjust the white balance to (X, Y) = (0.266,0.270) by using R/C. Use item No.47 (R CUT OFF) to adjust X,
item No.49 (B CUT OFF) to adjust X &Y. Do not change the item No.48 (G CUT OFF) setting.
C) Repeat A & B two or three times.
White balance adjustment flowchart
START
Cut off Adj
BLUE defocus Adj
Sub Brightness Adj (roughly)
Check
Low light W/B
If Bluish
Adjust High light W/B
Adjust Low light W/B
sub brightness Adj
Check
Low light W/B
High light W/B
Sub brightness
If OK
FINISH
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(
Press [MUTE] button on the R/C when adjustment has completed.)
Repeat two or three times, until no
adjustment is needed
If NG
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