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8. Geometric check : check and make sure geometric meets spec.
9. Get into OSD select EE-USER item, press ENTER till OSD disappear then turn off power, disconnect JP1,
turn on power again, make sure all of the alignment parameters has been stored properly, make H-SIZE adjust
range can OVER SCAN and -5%, PHASE adjust range >15mm, V-SIZE adjust range can OVER SCAN and
-6%, V-CENTRE adjust range >20mm and make sure TILT adjust works properly.
J. Power Adjustment
J-1. Adjust the VR980 so that the +15Vs rail is 15.3v
J-2. Check voltages below:
C974 :
C947 :
C946 :
C940 :
J-3. Short-circuit protection function check
the power source is 230vac input
1.
when C944 is shorted, all output voltage should be shut down and unlatch
2.
when normal condition is recovered, all output voltage should recover automatically.
3.
J-4. Side Pincushion, Tilt and Geometry Distortion Adjustment
1. Input timing 1, adjust the display be normal position and size.
2. Adjust front control key to get the best pincushion distortion and tilt.
3. Select P502 and adjust VR402~VR404 to get the best geometry distortion.
J-5. Focus Adjustment
1. Input timing 1, EXT. BRIGHTNESS move to center position. Use EXT.CONTRAST set the
brightness to 25FL.
2. Adjust Focus VR (mounting on FBT), to get best focus.
J-6. Preset Timing Adjustment
1. Input each PRESET MODE timing, and use front control key, adjust the display to the normal
position and size and wait for 5 seconds.
2. Switch to next timing repeat 1 process. Until every PRESET MODE timing has been adjusted.
J-7. Timing And Pattern
Timing mode
pattern.mdnm/
1 VESA 80k
CROSS HATCH
2 VESA 80K
2" SQUARE
3 VESA 80K
FULL WHITE
2 (MAX - MIN)
X100%
MAX + MIN
Any : <10%
Adjacent : <6%
202±3v
76 ± 2v
44 ± 1.5v
10.4 ± 1v
±
0.1v ( voltage of the C944) in timing 1.
-- 7 -
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