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56
ViewSonic Corporation
Confidential - Do Not Copy
VA2226w-1
6.4. Output power is unstable
Unstable power
Check sampling
Circuit
Check R822,
R823, R824
Change R822,
R823, R824
Check the R pin
voltage of IC803
Check R819, R820
Check R818, D804,
C807 if short
Change
R818,
D804,
Check pin2
of IC802
Check pin1 of
IC802 voltage
b l
1V
Change R808, R
809, R810, R 811,
R815,
END
Check the C
pin voltage of
IC803 if 3V
Change
IC803
Содержание VA2226w-1
Страница 5: ...2 ViewSonic Corporation Confidential Do Not Copy VA2226w 1 4 Handling and Placing Methods...
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Страница 50: ...47 ViewSonic Corporation Confidential Do Not Copy VA2226w 1 Disassembly Procedure BASE HINGE COVER STAND...
Страница 51: ...48 ViewSonic Corporation Confidential Do Not Copy VA2226w 1 Front Cover Back Cover...
Страница 52: ...49 ViewSonic Corporation Confidential Do Not Copy VA2226w 1 Keypad Board Chassis...
Страница 53: ...50 ViewSonic Corporation Confidential Do Not Copy VA2226w 1 Power Board Key Power Cable LVDS Cable...
Страница 54: ...51 ViewSonic Corporation Confidential Do Not Copy VA2226w 1 I F Board...
Страница 60: ...57 ViewSonic Corporation Confidential Do Not Copy VA2226w 1 6 5 Backlight can t be turned on...
Страница 61: ...58 ViewSonic Corporation Confidential Do Not Copy VA2226w 1 6 6 Black Screen and backlight turn on...
Страница 63: ...60 ViewSonic Corporation Confidential Do Not Copy VA2226w 1 6 8 Bad Screen...
Страница 64: ...ViewSonic Corporation Confidential Do Not Copy VA2226w 1 7 Block Diagram 61...
Страница 70: ...67 ViewSonic Corporation Confidential Do Not Copy VA2226w 1 9 PCB Layout Diagrams...
Страница 71: ...68 ViewSonic Corporation Confidential Do Not Copy VA2226w 1...
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Страница 74: ...71 ViewSonic Corporation Confidential Do Not Copy VA2226w 1 10 Exploded Diagram and Exploded Parts List...