Hitachi CP-S830W - Page 41

1-2 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.
@JInput 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 color correction circuit.
@ Input gray at 0.35Vp-p with a timing signal of SVGA
VESA(60).
@ Set RN34(GAIN) to minimum.
@Check the color uniformity of image.
@Continue this adjustment when color uniformity is
not good.
© Set RN34(GAIN) to maximum and RN31(HP),
RN32(HS) and RN33(VP) to mechanical center.
® Adjust RN32(HS) so that color balance of left and
right side is best,....visual check.
RN32 is control correction wave for Horizontal Saw.
About 30% part of 16 steps is here.
CP-S830W
CP-S830E
@Press the RESET button of the remote contro!
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.
@ Adjust RN31(HP) so that color balance of center
and side is best,....visual check.
RN31 is control correction wave for Horizontal
Parabola.
(© Adjust RN33(VS) so that color balance of top and
bottom is best,....visual check.
RN33 is control correction wave for Vertical Saw.