Hitachi CP-S830W - Page 10

CP-S830W
CP-S830E
4-2 White balance adjustment
Preparations for adjustment
1. Setting of condition
@ Apply heat-running for 10 minutes or more before
adjustment.
@ Project 40 inches size image with zoom set to the
widest.
2. Adjustment common voltage (flicker) .
Refer to the attached drawing.
@ Input 16 steps monochrome green with a timing
signal of SVGA VESA(60).
Adjust R748 so that brightness at about 30% part
of 16 steps Is the darkest.
@ Input 16 steps monochrome red with a timing signal
of SVGA VESA(60).
Adjust R848 so that brightness at about 30% part
of 16 steps is the darkest.
Adjustment Procedure
1. Adjustment of white balance.
@ Input 16 steps monochrome green at 0.7Vpp with a
timing signal of SVGA VESA(60).
@Adjust R665(W SUB CONTRAST) and R668(W
SUB BRIGHT) so that brightness of 16 steps is
best,....visual check.
@ Input white at 0.7Vpp with a timing signal of SVGA
VESA(60). And set CONTRAST , BRIGHT to
maximum.
@Major the normally white chromaticity. And note
these number. (x:xw,y:yw)
© Input gray pattern at 0.52Vpp with a timing signal of
SVGA VESA(60).
@Adjust R870(R SUB BRIGHT) and R970(B SUB
BRIGHT) so that the chromaticity at the center of
the picture is x=xw-0.0320.01,y=yw-0.034
0.01 (middle-brightness white balance)
About 30% part of 16 steps is here.
@Press the RESET button of the remote control
transmitter to set picture adjustment to NORMAL.
@Input 16 steps monochrome blue with a timing
signal of SVGA VESA(60).
Adjust R948 so that brightness at about 30% part
of 16 steps is the darkest.
@ Input horizontal green line (gray/black) signal with a
timing signal of SVGA VESA(60).
Adjust R748 so that flicker is the lest.
Adjust it so that flicker is the lest.
GAR
@ Input gray pattern at 0.21Vpp with a timing signal of
SVGA VESA(60).
®Adjust R862(R SUB CONTRAST) and R962(B
SUB CONTRAST) so that the chromaticity at the
center of the picture is x=xw-0.05+0.01,y=yw-
0.05+0.01 (iow-brightness white balance)
@ Repeat (5) to (8) and adjust middle-brightness and
jow-brightness white balance.
note When majoring and adjustment using Minolta
CL-100.
-~10-