Sharp Notevision XR-1X, Service Manual

Page: 39 / 142

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