- BENQ DLP PROJECTOR SERVICE MANUAL
46
No +5V output.
N o +12V O utput
Check Q702 works
norm ally ?(V ce> 10V )
Check Q705 works
norm ally ?
Check Q701 works
norm ally ?(V ce< 02V )
C heck + 5V -F ix exist ?
Check Q703 works
norm ally ?(V ce<0.2V )
C heck 12V exists ?
C heck R 730 and
layout trace.
C heck the trace of
+5V .
R eplace new P -
M O SFET.
Q 701 dam ages and
replace new
tran sisto r.
Q 702 dam ages and
replace new
tran sisto r.
Q 703 dam ages and
replace new
tran sisto r.
No
No
No
Yes
Yes
Yes
Yes
No
No
Yes
No
Yes
P roceed to "N o 12V
Output".
Proceed to "N o +5V -
Fix output".