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2. Unstable Power
Unstable power
Check sampling
Circuit
Check R822,
R824, R825,
R822, R824, R825,
R826,
Check the R pin
voltage of IC803
about 2 5V
Check R832, R820
Check D803 ,C807 if
short
Change D803
C807
Check pin2 of
IC802 voltage is
3V
Check pin5 of
IC802 voltage
below 1.4V
Change R33, R 834
R835, R 805,
END
Check the C pin
voltage of IC803 if
3V
Change
IC803
Summary of Contents for G2220HD - 21.5" LCD Monitor
Page 17: ...17 Power Off 1W Off...
Page 21: ...21 5 Stick the foil 6 Stick the foil 7 Plug in the keypad cable 8 Assemble the back cover...
Page 22: ...22 9 Assemble the stand and screw the screws 10 Assemble the base...
Page 25: ...25 5 Remove the keypad cable 6 Pull out the lamp wire 7 Remove the foil 8 Remove the foil...
Page 26: ...26 9 Pull out the LVDS 10 Remove the chassis 11 Remove the keypad 12 Remove the panel...
Page 27: ...27 5 4 Block diagram Power Board...
Page 28: ...28...
Page 29: ...29...
Page 30: ...30...
Page 31: ...31 IF Board...
Page 32: ...32...
Page 33: ...33...
Page 34: ...34...
Page 35: ...35 5 5 Lay out 5 5 1 IF board lay out...
Page 36: ...36...
Page 37: ...37 5 5 2 P I Board lay out...
Page 47: ...47 6 Dimmession Drawing...