Adjusting Procedure - ViewSonic VE175-2 Service Manual

5. Adjusting Procedure

5.1. ADJUSTMENT CONDITIONS AND PRECAUTIONS
1. Approximately 30 minutes should be allowed for warm up before proceeding.
2. Adjustments should be undertaken only on those necessary elements since most of them have been
carefully preset at the factory.
3. ESD protection is needed before adjustment.
5.2. MAIN ADJUSTMENTS
NO. FUNCTION
1. WHITE BALANCE
2. GEOMETRY
5.3. ALIGNMENT PROCEDURES
Adjustment Conditions and Precautions:
(A). Power supply voltage:
AC 110/120V ¡ Ó 10% 60 Hz ¡ Ó 5%, AC 220/240V ¡ Ó 10% 50 Hz ¡ Ó 5%.
(B). Warm up time:
The display must be powered ON for at least 30 minutes at full white pattern before starting
alignments.
This is especially critical in color temperature and white balance adjustments.
(C). Signals: reference the front detail specifications and timing table.
Video: reference the front detail specifications.
1. Adjustment of White Balance:
A. TIMING: 1280x1024 64KHz/60Hz.
B. PATTERN: 5 Blocks.
C. LCD MONITOR set to 1280x1024 80K/75Hz BURN IN and warm up over 30 minutes.
D. CA110 color analizer at the center of screen and along a perpendicular to the screen at 20cm from the
display.
E. Power turn off, Press
release
F. Adjust Color Temperature:
(1) EEPROM INIT (5 BLOCKS):
Press " ¡ ¿ " key move cursor to EEPROM INIT, Press "
INIT ADC value.
ViewSonic Corporation
DESIGNATION
FUNCTION KEY
FUNCTION KEY
" ¡ ¶ " and "
" ¡ ¿ " and " "
key, Then press "
2
"
2
and turn on power at the same time after power LED is on,
" key go to factory mode. (Fig.1)
1
(Fig.1)
2
11
Confidential – Do Not Copy
" key then monitor will
VE175/b-2