Sony VPL-ES4, Service Manual

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3-5
VPL-ES4/EX4
B
A
No
Q602 works
normally ?
Check ZD602, R655 and
R656.
Check mian board.
No
Yes
F602 Open ?
Replace F602 with new
one.
Check Q701 IC604,
Q604, Q603 or ZD603.
And then replace broken
parts.
Check if 18V
exists at c-terminal
of Q603.
Yes
Yes
Check if there
is PFC_On/Off
signal.
Yes
No
No