4. No Sound (Test signal: 1rms sine waveform)
YES
YES
NO
Check that ICA3 Pin 7 is approximately 12V
Check that ICA1 Pin 3 is
approximately 9V
Check that ICA4 Pin4 is
Low voltage
YES NO
Check ICA4
Pin5, 6, 7, 8 is12V
Failure point
1.JA1 failure
2.ICM10 failure
Check ICA2 pin11
Pin15 signal is
FIG 19.
Check ICA1 pin2
is about 5V
NO
YES
YES
NO
Check ICA5, ICA6 pin4 is
about 5V
Failure point
1. QA6 or QA7 failure
2. ICA3 failure
YES
NO
Check ICA3 pin4, 6
is FIG20.
Failure point
1.ICA1 failure
2.ICM10 failure
ICA5 or ICA6 failure
ICM10 failure
YES
NO
NO
ICA4 failure
ViewSonic Corporation
Confidential
– Do Not Co
py
VX500+-1
4
3
Содержание VX500PLUS-1
Страница 42: ...FIG 13 AUDIO SINE SIGNAL OUT ViewSonic Corporation Confidential Do Not Copy VX500 1 39...
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Страница 60: ...ViewSonic Corporation Confidential Do Not Copy VX500 1 57 11 BLOCK DIAGRAM...
Страница 67: ...ViewSonic Corporation Confidential Do Not Copy VX500 1 64 13 PCB LAYOUT DIAGRAM...
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