ViewSonic A90f+-1 VCDTS23307-2R Service Manual page 23

c). Brightness at center, contrast at maximum.
d). Adjust R827 for the voltage to 82V of D816 .
7-2 High voltage
a). Apply Chroma 2225 signals with 31.47kHz / 60Hz (640 x 480) Mode and full white pattern to the
monitor.
b). Connect AC input and power on the monitor.
c) ..Brightness at center, contrast at maximum.
d) .Adjust R176 for Normal high voltage = 25.9 kV
7-3 Full brightness setting (Timing Mode 13)
a) .Apply Chroma 2225 signals with full white pattern to the monitor.
b). Connect AC input and power on the monitor.
c). Brightness at center, contrast at maximum.
d). Adjust preset Horizontal and vertical size.
e). Set R, G, B bias and Gain (follow color temp. adjustment procedure)
f). Adjust R167 to get 29+/-1FL
7-4 OSD Adjustment (See the table below), (Enter Factory preset OSD Menu)
Turn on the monitor by pressing power switch and OSD on/off key at the same time, release power
switch and continue to press enter key, then release the enter key after display appears.
ViewSonic Corporation
20
Confidential – Do Not Copy
A90f+-1