TroubleshootingProcedures
WFM90D and WFM91D ServiceManual 6-51
Usethis proc edure when the graticule
andmenu are bad, but the PI X mode is
ok(moderate to s evere vertical flutter).
No
Yes
Performthe Ras ter VCO
adjustment, if possible, in
theAdjustment procedures.
Checkthe R aster VCO control
signal:
(J9is on the Top board.)
J9-6= Approximately 10mVDC
Isthe
RasterVCO
controlsignal
OK?
Replacethe
Topboard.
Replacethe Bott om board.
Figure6 -26: Flowchart for bad grat iculesand m enus