Sony VPL-X2000U Service Manual page 123

(3) The standby power is output, but no digital circuit power (+3.3V, +5.2V, —5.2V, —2V, AUDIO+B is output even when the
power is ON.
START
Pin A6 of CN7502 is not H (5V).
NO
Is the IC link of each output open?
(PS7801 to PS7805)
NO
"Check if D7804 has short-circuited,
and replace if it has."
Is R7801 open?
NO
END
YES
No power ON signal is output from the
microprocessor side. Check the M board.
YES
Check if any of the outputs has short
-circuited with GND at the load side.
YES
Check if IC7801 is damaged.
4-5