AOC 919swa Service Manual
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Page 31
19 LCD Color Monitor AOC 919Swa 31 No picture (LED orange) No picture OK OK NG NG Measure U404 Vout=3.3V U405 Vout=1.8V Replace U404,U405,CN404 X401 oscillate waveforms are normal Replace X401 Check if the sync signal from computer is output and video cable is connected normally Input the sync signal of computer, or...
Page 32
19 LCD Color Monitor AOC 919Swa 32 White Screen White screen Measure Q404base is low level? X401 oscillate waveform is normal Check FB402,Q405 is broken,or CN405 solder? Check Correspondent component. Replace PANEL Check Correspondent component. Replace U401 OK OK OK Replace X401 OK NG NG NG NG Check reset circuit of U401 is normal
Page 33
19 LCD Color Monitor AOC 919Swa 33 9.2.2 Power Board 1. No Power Check ZD902 = 16V Check AC line volt 110V or 240V Check AC input Check the voltage of C905(+) Check bridge rectified circuit and F901 circuit Check start voltage for the pin3 of IC901 Check R904,R905,R906 and Change IC901 NG Check the auxiliary voltage 1) Check...
Page 34
19 LCD Color Monitor AOC 919Swa 34 2. W/LED No Backlight Check C812 (+) =16V NG OK Change adapter and MB Check ON/OFF signal Check main board NG OK Check IC801 pin15=16V NG OKChange Q801 Check the pin13 of IC801 have saw tooth wave NG Change IC801 Check PT801 have the output of square of wave at short Change C819,C820,C821,C822...
Page 35
19 LCD Color Monitor AOC 919Swa 35 9.2.3 Key Board OK OK OSD is unstable or not working Is Keypad board connecting normally? Is Button Switch normally? Is Keypad board normally? Check main board Connect Keypad Board Replace Button Switch Replace Keypad Board NG NG NG OK
Page 36
19 LCD Color Monitor AOC 919Swa 36 10. White- Balance, Luminance Adjustment Approximately 30 minutes should be allowed for warm up before proceeding white balance adjustment. Before started adjust white balance , please set the Chroma-7120 MEM Channel 3 to Warm (6500K) color, MEM Channel 4 to Normal (7300K) color, MEM Channel 9 to Cool (9300K) color , and MEM Channel 10 to sRGB color ( our Warm color...
Page 37
19 LCD Color Monitor AOC 919Swa 37 C. Adjust Cool (9300K) color-temperature 1. Switch the Chroma-7120 to RGB-Mode (with press “MODE” button) 2. Switch the MEM. Channel to Channel 9 (with up or down arrow on chroma 7120) 3. The LCD-indicator on chroma 7120 will show x = 313 ±30, y = 329 ±30, Y = 200 cd/m2 4. Adjust the RED of color1 on factory window until chroma 7120 indicator reached the value R=100...
Page 38
19 LCD Color Monitor AOC 919Swa 38 11. Monitor Exploded View
Page 39
19 LCD Color Monitor AOC 919Swa 39 Item Description Item Description 1 BEZEL(L19WA-8Q1A) 11 HINGE 2 LENS 12 STAND TOP 3 KEY PAD 13 STAND 4 KEY BOARD 14 BASE8S2 5 PANEL 15 FOOT 6 POWERBOARD S1 SCREW 7 MAIN BOARD S2 SCREW 8 MAIN FRAME S3 SCREW 9 SPK S4 SCREW 10 REAR COVER19
Page 40
19 LCD Color Monitor AOC 919Swa 40 12. BOM List Note: The parts information listed below are for reference only, and are subject to change without notice. Please go to http://cs.tpv.com.cn/hello1.asp for the latest information. T99LHDDBWKA1ANE Location Part NO. Description Remark 040G 58162435A P/N LABEL FOR MANUAL PE BAG 041G780061553A TCO03 CARD 050G 600 1 W WHITE STRAP...