ViewSonic PJ503D-1 - Page 93

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ViewSonic Corporation Confidential - Do Not Copy PJ503D-1
Check IC651.
Check primary
circuit.
Output Pin shorted to
GND ? (Pin8)
Check D6551~D6554
damages ?
Check Q651 damages ?
Fuse Broken ?
Inside diodes of
D6551~D6554 are
shorted. Replace new
bridge diode.
PinD & PinS of Q651
are shorted. Replace
new MOSFET.
Check 18VPFC
Votage.
Replace with new
6561 and ZD651,
D6534
Check Pin8 if shorted
to GND.
Proceed to "Check
IC651".
Proceed to "Check
IC651".
Yes
Yes
No
No
Yes
No
Yes
No