- BENQ DLP PROJECTOR SERVICE MANUAL
48
Check IC601.
Check primary
circuit.
Is the PW M waveform of
Pin6 of IC601 is correct ?
Check BD651 damages ?Check Q601 damages ?
Fuse Broken ?
Inside diodes of
BD601 are shorted.
Replace new bridge
diode.
PinD & PinS of Q601
are shorted. Replace
new
R612,Q601,R611,ZD
602,IC601 and Fuse.
Replace IC601.
Replace ZD601 and
IC603.
Open R612 and inject
12V to Pin7 of
IC601.
Proceed to "Check
IC601".
Proceed to "Check
IC601".
Yes
Yes
No
No
Yes
No
Yes
No