Service manual

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64!
6. Show “No Signal” on screen
(Test pattern: 32 gray 1280X1024 60HZ)
7. Keypad can not work
Check the signal level of R610,
R611, R612 is FIG 5.
YES
Check the HS and VS is
FIG 6. and FIG 7.
NO
YES NO
NO
Check that the cable is
fully connected between
the Interface board and
Key board
Failure point
The cable is disconnected
Failure point
1. IC400 pin 1, 4, 42, 43, 46,
47, 125,206 failure
2. TACT switch failure
Failure point
1. The video connector is disconnected
2. Signal cable is disconnected
ViewSonic Corporation
Confidential – Do Not Copy VX700-3