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Diagnostic Information 2-13
4044-XXX
Cover Open Switch Service Check
Note: Make sure a toner cartridge is installed and the cover closes
all the way, engaging the cover open switch lever. The lever can
easily be positioned incorrectly if the top cover has been removed
and replaced.
FRU Action
Models E310 & E312
Cover Open Switch
Make sure the cover open switch
cable is properly seated in CN2 of
the HVPS. Disconnect the cable and
check the switch for continuity. Push
the cover open switch lever down to
engage the switch and close the
circuit. If the circuit does not close,
replace the switch.
Model E310
HVPS
Engine/LVPS Board
Measure the voltage at CN2-3 of the
HVPS. It measures +24 V dc. If
voltage is present at CN2-3, check
for continuity between CN2-1 and
CN1-2. If continuity does not exist,
replace the HVPS. If continuity does
exist, check the HVPS to engine/
LVPS board cable for continuity.
Replace if defective. If voltage is not
present at CN2-3, check the voltage
at CN1-1. It measures +24 V dc. If it
does, replace the HVPS. If it does
not, check the voltage at CN2-2 of
the engine/LVPS board. It measures
+24 V dc. If it does, replace the
HVPS to engine/LVPS board cable.