![background image](http://html1.mh-extra.com/html/viewsonic/vx700-3/vx700-3_service-manual_1020017053.webp)
!
62!
5. No Sound (Test signal: 1r.m.s sine waveform)
YES
YES
NO
Check that ICA3 Pin 7 is approximately 12V
Check that ICA1 Pin 3 is
approximately 9V
Check that Q306 Pin 4 is
Low voltage
YES NO
Check Q306
Pin5, 6, 7, 8 is12V
Failure point
1.JA1 failure
2.IC400 pin123 failure
Check ICA2 pin11
Pin15 signal is
FIG 17.
Check ICA1 pin2
is about 12V
NO
YES
YES
NO
Check ICA5,ICA6 pin 4 is
about 5V
Failure point
1. QA6 or QA7 failure
2. ICA3 failure
YES
NO
Check ICA3 pin 4, 6
is FIG18.
Failure point
1.ICA1 failure
2.IC400 pin 123 failure
ICA5 or ICA6 failure
IC400 pin 125 failure
YES
NO
NO
Q306 failure
ViewSonic Corporation
Confidential – Do Not Copy
VX700-3
Содержание VX700-3
Страница 32: ...41 Treble press or to adjust treble ViewSonic Corporation Confidential Do Not Copy VX700 3...
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