Sharp XG-F210X, Service Manual

Page: 41 / 140

XR-30S/XR-30X/XG-F210X
5 – 4
YES
Is 13 V applied to pins (3),
(4), (5) and (6) of the
connector P704?
YES
YES
Is DC voltage of 380 V
applied to both ends of
C740?
YES
Check circuits F705 and
after or replace F705.
YES
Is F705 in the OPEN
status?
Is pin (11) of the connector
P704 at "H"?
Are connectors P704 and
CN901 fully inserted?
NO
NO
Securely insert the
connectors.
Check peripheral circuits
of IC707.
YES
NO
NO
Is LAMP-EN/SYNC signal
properly sent to pin (14) of
the connector P704?
(Refer to the waveform
chart
.)
Are GATE waveforms of
Q901 appropriate?
(See waveform diagram
.)
NO
Does the lamp turn on?
YES
Check the main PWB.
Check the main PWB.
NO
Check the main PWB.
NO
Check the ballast PWB.
NO
Power supply PWB check
1