ViewSonic VX715 - Page 31

ViewSonic Corporation
31
6.5 No Power
Check to CN102 Pin12=12V
Check Interface board
Check AC line volt 110V or 220V
OK
N
G
OK
Check AC line
Check the voltage of C905(+)
Check F901, bridge rectified circuit
Check start voltage for the pin3 of IC901
Check R906, R907, IC901
Check the auxiliary voltage is between 10V-16V
1) Check IC901
2) Check Q901, Q902 OVP circuit
N
G
OK
Check D910, D911, ZD904
OK
OK
NG
N
G
N
G