Service manual

4.1. 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.
4.2. MAIN ADJUSTMENTS
NO. FUNCTION DESIGNATION
1. EEPROM Initial Function Key
2. White Balance Function Key
4.3. ALIGNMENT PROCEDURES
Adjustment Conditions and Precautions:
(A). Power supply voltage:
AC 110/120V±10% 60 Hz±5%, AC 220/240V±10% 50 Hz±5%.
(B). Warm up time:
The display must be power 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. EEPROM Initial:
A. Timing : 1024x768@60Hz.
B. Pattern : Cross hatch.
C. Switch off the power and press the “▲” and “enter “ key simultaneously, and switch
on the power. At this time we can enter into the factory mode.
D. Select the “EEPROM INIT” item and press “enter“key to reset the EEPROM.
2. White Balance Adjustment :
A. Timing : 1024x768@60Hz.
B. Pattern : 16 gray.
C. Set CA110 color analizer at the center of screen and along a perpendicular to the
screen at 20cm from the display.
D. Press menu key select the OSD page on INPUT SELECT and select MAIN:VGA.
E. Press menu key change the OSD page to adjust page.
F. Press “▼” key to select the “ WHITE BALANCE” item in the factory mode and
press “enter “key, then the white balance will be auto dadjusted .
G. Color temperature verification :
Warm /SRGB x=0.313±0.03 y=0.329±0.03
USER x=0.283±0.03 y=0.298±0.03
COOL x=0.271±0.03 y=0.278±0.03
Y
≥
380 cd/m
2
8
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Do Not Copy N3250w-G
4. Adjustment Procedure