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File name AOC_Monitor Repair Tips.pdf

file:///F|/Computer_Monitors/Monitor Repair Tips-AOC.htm Monitor Make AOC AOC AOC AOC AOC AOC AOC AOC AOC AOC AOC AOC AOC AOC AOC AOC AOC AOC AOC AOC AOC AOC AOC AOC AOC AOC AOC AOC 4L 4L 4L 7H Monitor Model Problem BRIGHTNESS CONTROL INOP DEAD, FUSE OK LOSS OF HORIZONTAL SYNC EXCESSIVE BRIGHTNESS, RETRACE LINES, BRIGHTER ON ONE SIDE MONITOR IS LOUD/WHINY (AUDIBLE NOISE) WILL NOT POWER ON...POWER INDICATOR IS LIT EGA TOO WIDE EGA TOO WIDE MONITOR IS LOUD/WHINY (AUDIBLE NOISE) DEAD DEAD NO DISPLAY/VERTICAL DEAD MONITOR IS LOUD/WHINY (AUDIBLE NOISE) DEAD LOSS OF SYNC BLOWS VIDEO IC LOSS OF SYNC WHEN COLD HV TOO HIGH HOT FAILURE DEAD NO HORIZONTAL HOLD BAD SYNC LOSS OF HORIZONTAL SYNC HOT BLOWS HV TOO HIGH GARBAGE ON SCREEN HORIZONTAL DISTORTION Solution CHECK R-716 FOR OPEN CHECK A/C SWITCH FOR OPEN BAD IC201 CHECK C810 ON CRT BOARD 100UF/50V HITEMP SILICONE UP L804 REPLACE D603 AND FUSE F600 Q521, Q515, D522 (ECG552) Q521, Q515, D522 SILICONE UP L804 IN P/S CHECK D920 ECG576 (6V LINE IS DEAD) IN P/S CHECK Q901 ECG2333 AND R907 .22 1W VERTICAL YOKE SOLDER JOINTS SHORTED BY LUG ON BASE...CHECK ALL SOLDER ON YOKE IN P/S CHECK C914, C917, C919, Q901 ECG2333, R907 .22/1W SILICONE UP L804 CHECK ALL C512, C542, ZD503, Q510 2SB861, Q502 2SC4742 C512 100/50 AND ALIGN REPLACE IC301 LM1203N...ALIGN (USE M624 CHASSIS MANUAL) ADJUST VR311 TO .5VDC, ADJ VR501 FOR STABLE IMAGE, ADJ VR505 FOR STABLE IMAG IC303 BAD (ECG943M) CHECK ALL: Q502, Q510, C512, ZD503(12V), C542EC303, C515,L02 196MH .26, C528 CHECK SOLDER AND C512 ALIGN, SOLDER UP, CHECK C512 100/25V CHECK C512 AND ALIGN CHECK C312 100/16V AND ALIGN Q502, Q510, Q512, ZD503, C542, IC303, C515, L02, C528 (CHECK ALL) IC303 ECG943M CHECK IC403 LA7851, C408(C271) C812 100/16V ALL MODELS C142 CM-312 CM-312 CM-312 CM-312MG CM-333 CM-333 CM-333 CM-335 CM-335 CM-335 CM-335 CM-335 CM-335 CM-335 CM-335 CM-335 CM-335 CM-335 CM-335 CM-335 CM-335MG CM-336 1 of 3 17/05/99 10:29 AM file:///F|/Computer_Monitors/Monitor Repair Tips-AOC.htm AOC AOC AOC AOC AOC AOC AOC AOC AOC AOC AOC AOC AOC AOC AOC AOC AOC AOC AOC AOC AOC AOC AOC AOC AOC AOC AOC AOC CM-336CD CM-336CD CM-346 CM-536 CM-536 CM-735 CM-735 CM-735 CM-735 CM301TG CM301TG CM323MG CM323MG CM323MG CM323MG CM333MG CM333MG CM335 CM335 CM335 CM335 CM335 CM335 CM335 CM335 CM335 CM336 CM336 SHUTS DOWN WHEN WARM DEAD SCREEN SHIFTS LEFT WIDTH PULLED IN, PINCUSHION BAD RIGHT SIDE VIDEO POOR, BLOWS HOT REGULATION FAILURE DISPLAY FLICKERS NO HIGH VOLTAGE DEAD WITH TIC/TIC SOUND DEAD. NO RASTER DEAD. NO RASTER DEAD. NO RASTER DEAD. NO RASTER DEAD. NO RASTER HORIZIONTAL BLOWN DEAD WIDTH SHRINKING DEAD, POWER SUPPLY BURNED CONTRAST POOR, PIX DIM SYNC INOP ON LOW RESOLUTION PIX DRIFTS TO THE RIGHT AFTER WARMUP HORIZ OUTPUT TRANSISTOR SHORTED CONTRAST POOR, WON'T ADJUST HORIZ SHRINKS,VERT COLLAPSE,COMES BACK EXCESS CURRENT, H.O.T. DEAD. HORIZ SYNC INOP WHEN 1ST TURNED ON, PIX JITTERS HIGH VOLTAGE INOP DEAD C812, ADJUST HOLD DOWN TP TO 8VDC CHECK D922 IN 24V (ECG576) SOL