ViewSonic P90F Service Manual page 26

9-2 High voltage
a). Apply PC signal 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 = 26.2kV
9-3 Full brightness setting (Timing Mode 91kHz /85Hz 1280 x 1024 mode)
a). Apply Chroma 2250 pattern generator or PC 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 proper Horizontal and vertical size.
e). Set R, G, B bias and Gain (follow color temp. adjustment procedure)
f). Adjust R167 to get 30FL.+/- 1FL
9-4 OSD Adjustment (See the table below)( Enter 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 until display appears.
Note: For autosizing function, each preset mode adjustment must be stored into MCU by pressing
the "Head" Icon on preset OSD menu.
Item
(1) Horizontal
Raster Center
(2) Vert. Linearity
C Correction
Adjustment
S Correction
Adjustment
ViewSonic Corporation
Adjustment Description
* Mode : Mode 11 (1600x 1280 @85Hz)
* Pattern : Black (Background)
* Brightness : Raster visible
* Adjust R454 for raster position
* Mode : Mode 9(1024 x 768 @ 85Hz)
* Pattern : 8 x 6 Crosshatch
* Brightness : Center
* Contrast : Max
* Open OSD , enter "FS" and select "LB"
Adjust until square height of top is equal to
bottom
* Open OSD, enter "
" "
Adjust until square height of top and bottom
are
equal to center.
" and select
22
Confidential – Do Not Copy
SPEC.
BEZEL RASTER
B
A
|A-B|=0.5—1mm
Ymax - Ymin
<= 4%
Ymax + Ymin
P90f-1