Sharp XR-1X Serviceanleitung Seite 39

Checking the power unit
Is 6 V applied to pins (3)
and (4) of the connector
CN711?
Is 13 V applied to pin (7) of
the connector CN711?
Does the lamp turn on?
Check the main PWB.
Are connectors CN1712
and CN713 fully inserted?
Is DC voltage of 370 V
applied to both ends of
C714?
Is CP711 in the OPEN
status?
Check circuits CP711 and
after or replace CP711.
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NO
1
YES
NO
Check peripheral circuits of
IC712.
YES
NO
YES
NO Securely insert the
connectors.
YES
NO
Is pin (1) of the connector
CN702 at "H"?
YES
Check peripheral circuits
of IC711.
Is LAMP-EN/SYNC signal
properly sent to pin (1) of
NO
the connector CN1712?
(Refer to the waveform
chart 1.)
YES
NO
Check circuits CP711 and
after.
manuals search engine
NO
Check the main PWB.
YES
NO
Check the main PWB.
39
XR-1X