Service Manual
29
Chapter 6- TROUBLE SHOOTING
Common Acknowledge
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If you change the M/B, be sure that the U101, U102 and U105 these three components also
changed to the new M/B because there was program inside. If not, please re-write EDID or
upload firmware into serial flash (U105) via VGA Cable. How to do please refer to the Page
19.
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If you adjust clock and phase, please do it at condition of Windows shut down pattern.
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Please confirm the R/G/B color under 32gray scale pattern.
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This LCM is analog interface. So if the entire screen is an abnormal color that means the
problem happen in the analog circuit part, if only some scale appears abnormal color that
stand the problem happen in the digital circuit part.
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If you check the H/V position, please use the crosshatch pattern.
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This LCM support 10 timing modes, if the input timing mode is out of specification, “Cannot
Display this Video Mode” will be displayed on the screen.
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If brightness uneven, repairs Inverter circuit or change a new panel.
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If you find the vertical line or horizontal line lost on the screen, please change panel.
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If the self-test pattern is moving on the screen, please check whether VGA Cable is plugged
in the Monitor or PC if select analog model on OSD or check whether DVI Cable is plugged in
the Monitor or PC if select DVI model on OSD . If the VGA or DVI Cable is plugged in well,
please change another VGA or DVI cable.
No Power and LED Off
Is there DC16V at L853?
Is there DC5V at L855?
Is the voltage at C854 in the
range of 127V~373V?
Is the voltage at pin3 of U830 18.4V?
Is the voltage at pin6 of U830 0.9V?
Is the voltage at pin7&pin8of T850 38V?
Check D856
Check RT850, F850
Check R852
Check D852, Q850
YES
YES
YES
YES
NO
NO
NO
NO
Содержание 320-7459 - S1909WXF - 19" LCD Monitor
Страница 1: ...Service Manual 0 Service Manual LCD Monitor S1909WXf ...
Страница 16: ...Service Manual 15 8 Key Parts Pin Assignments 8 1U104 TSUM56BWHK LF 2 ...
Страница 17: ...Service Manual 16 ...
Страница 18: ...Service Manual 17 ...
Страница 53: ...Service Manual 52 Attachment 3 PCB Layout power inverter bd Power inverter bd Top Layer ...
Страница 54: ...Service Manual 53 Bottom Layer ...
Страница 55: ...Service Manual 54 I F board Top Layer ...
Страница 56: ...Service Manual 55 Bottom Layer ...
Страница 57: ...Service Manual 56 Keypad Top Layer Power key Top Layer Bottom Layer ...