ViewSonic PJ513D-1 Service Manual page 89

Check primary
circuit.
Fuse Broken ?
Yes
Check Q601
damages ?
Yes
PinD & PinS of
Q601 are shorted.
Replace new
MOSFET.
Check IC601.
Check Pin8 if
shorted to GND.
Output Pin shorted to
GND ? (Pin8)
Yes
Replace with new
IC L6561D and
D611, D612, and
D613
ViewSonic Corporation
Proceed to "Check
No
IC601".
Check BD601
No
damages ?
Yes
Inside diodes of
BD601 are
shorted. Replace
new bridge diode.
Check 15VPFC
No
Votage.
86
Proceed to "Check
No
IC601".
Confidential - Do Not Copy
PJ513D-1