ViewSonic E70F Service Manual - Page 13

12.5 MOIRE PATTERNING 12.5.1 FOCUS MUST BE ADJUSTED AS 12.4. 12.5.2 APPLY A FULL WHITE PATTERN SIGNAL. 12.5.3 ADJUST BRIGHTNESS CONTROL FOR A RASTER JUST AT THE THRESHOLD OF EXTINCTION. 12.5.4 AS THE CONTRAST CONTROL IS ROTATED TO ACHIEVE ANY DISPLAY INTENSITY AT 12 FL PRIMARY MODE: NO MOIRE PATTERN MAY BE VISIBLE. OTHER MODE: A AREA ON MOIRE VISIBLE, B AREA HAS SLIGHT MOIRE. 12.6 BRIGHTNESS UNIFORMITY 12.6.1 APPLY A FLAT WHITE FIELD SIGNAL.AT 1024 * 768 85Hz MODE. 12.6.2 BRIGHTNESS VARIATION DUE TO CRT CHARACTERISTICS MUST BE MONOTONIC FROM THE DISPLAY CENTER TO ANY DISPLAY EDGE, WITH THE DISPLAY CENTER AT 20 FEET LAMBENT THE MAXIMUM CENTER TO CENTER LIGHT FALL OFF SHOULD BE NO MORE THAN 25% OF THE AVERAGE OF THE FOUR CORNERS AND WITH NO ONE CORNER MORE THAN 25% LESS THAN THAT OF THE CENTER . 12.7 ARCING CORONA 12.7.1 NO MORE THAN 2 ARCS ARE PERMITTED DURING AN 8 HOURS PERIOD OF NORMAL OPERATION. INCLUDING ARCS INDUCED BY TURN-ON AND TURN-OFF. 12.7.2 NO ARCING OR CORONA MAY OCCUR BETWEEN METAL PARTS AT ANY TIME INCLUDING TURN-ON AND TURN-OFF. 13. X-RAY PROTECTION TEST 13.1 SHUTDOWN CIRCUIT CHECKS. 13.1.1 INPUT VGA 31.5KHZ SIGNAL, PATTERN: SIGNAL A. 13.1.2 SET BRIGHTNESS 50%, CONTRAST 100%. 13.1.3 WHEN THE ZD405 PARALLEL WITH 27K RESISTOR, THE MOITOR MUST BE SHUTDOWN AND NO SPOT. 13.1.4 TURN POWER OFF, AFTER TURN ON AGAIN, MONITOR MUST BE OPERATED NORMAL. NOTE: THIS TEST MUST BE PERFORMED ON ALL SETS BEFORE THE BACKCOVER IS INSTALLED. 14. VIDEO TEST 14.1 WHITE BALANCE CHORMATICITY & COLOR TRACKING & AVERAGE LIGHT O/P (TEXT/SPEADSHEET MODE) 14.1.1 APPLY SIGNAL 69KHz/ 85KHz, PATTERN: FULL WHITE PATTERN. 14.1.2 SET BRIGHTNESS 50%, CONTRAST 100% 14. 1.3 SET ULTRABRITE FUNCTION TO TEXT/SPEADSHEET MODE. 14.1.3 COLOR TEMPERATURE MUST BE: 9300°K o x = 0.283 ± 0.012; y = 0.297 ± 0.012 6500°K o x = 0.313 ± 0.012; y = 0.329 ± 0.012 5000°K o x = 0.349 ± 0.012; y = 0.359 ± 0.012 14.1.4 LIGHT OUTPUT MUST BE BETWEEN 28-32 FL. 14.1.5 COLOR TRACKING ERROR ( ONLY 9300°K ) 14.1.6 APPLY FULL WHITE PATTERN ADJUST CONTRAST FROM 30FL TO 10FL AND CHECK THE CHROMATICALLY MEET FLOWING SPEC. | x (AT CONTRAST, 30) - x (AT CONTRAST, 25.75) | ” 0.007. | y (AT CONTRAST, 30) - y (AT CONTRAST, 25.75) | ” 0.003. | x (AT CONTRAST, 25.75) - x (AT CONTRAST, 10) | ” 0.007. | y (AT CONTRAST, 25.75) - y (AT CONTRAST, 10) | ” 0.006. 14.2 CONTRAST RANGE 14.2.1 APPLY SIGNAL 69KHZ/ 85Hz, PATTERN: 70x70mm WINDOW BLOCK. 14.2.2 SET BRIGHTNESS 50%. 14.2.3 SET COLOR TEMPERATURE 9300oK 14.2.4 WITH CONTRAST AT MAXIMUM, 45 + 3FL FOR TEXT SPREADSHEET MODE 85+5 FL FOR GRAPHICS/GAME MODE 150+5 FL FOR VIDEO/MOVIE/DVD MODE ViewSonic Corporation Confidential - Do Not Copy E70f+SB-3 10