Hitachi CP-SX5500W, Service Manual

Page: 6 / 64

6
CP-SX5500W
4-4 CYCLE OFFSET adjustment (vertical stripe adjustment)
Signals for internal adjustment
192
/256
168
/256
144
/256
120
/256
96
/256
72
/256
48
/256
24
/256
CYCLE NO. 1 R 0 G 0 B 0
Major adjustment cycle No.
Adjustment procedure
1. Make this adjustment after completing the
adjustment in 4-3 Flicker adjustment.
2. Use DAC-P - CYCLE - R: in the Adjustment menu
to adjust so that the vertical lines spaced every 12
dots are as inconspicuous as possible.
3. In the same way, use DAC-P - CYCLE - G: in the
Adjustment menu to adjust vertical stripes of G color.
4. In the same way, use DAC-P - CYCLE - B: in the
Adjustment menu to adjust vertical stripes of B color.
4-5 White balance adjustment
GAMMA MENU (left side)
VID-AD C.UNIF. DAC-P GAMMA GAMMA
R
0
0
0
0
0
0
0
G
0
0
0
0
0
0
0
B
0
0
0
0
0
0
0
93%
86%
75%
43%
29%
14%
0%
GAMMA MENU (right side)
VID-AD C.UNIF. DAC-P GAMMA GAMMA
R
128
128
G
128
128
B
128
128
SUB CONTRAST
SUB BRIGHT
Preparations
1. Perform these adjustments after the CYCLE
OFFSET adjustment described in Section 4-4.
2. Reset gamma correction before adjustment.
Place the cursor on [GAMMA] (left side) in the
Adjustment menu, press the [RESET] key and
select [DEFAULT].
Now press the [RESET] key again and press the
[MAGNIFY-OFF] button of the Remote control
transmitter for 5 seconds or more (the confirming
to “MICRO” reset menu will appear).
Place the cursor on [GAMMA] (right side) in the
Adjustment menu, press the [RESET] key and
select [DEFAUT].
3. Whisper mode set to [Normal] in the Setup menu.
Adjustment procedure
1. First, adjust the G color.
2. GAMMA mode set to [DYNAMIC] in the lmage menu.
3. BRIGHT and CONTRAST set to in the Setup
menu.
4. Place the cursor on Slide Show in the Adjustment
menu [A/D], press the [ ] key three times to
display G monochrome and adjust the luminance
at the center of the screen. Make a note of the
setting (here assumed to be A [lx]). Press the
MENU key to return.
5. BRIGHT and CONTRAST is returned to default in
the Setup menu.
6 GAMMA mode is returned to default in the lmage menu.
7 Place the cursor on 0%, measure the illumination
at the center of the screen. Make a note of the
setting (here assumed to be B [lx].
8. Adjust Gamma, 93%, and G: in the Adjust menu so
that luminance (Y) at the center of the screen is
adjusted as follows.
Y = (A-B) x 0.680 +B ± 2% [lx]