Lexmark E310 Service Manual - Page 35

Cover Open Switch Service Check, Make sure a toner cartridge is installed and the cover closes

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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 Models E310 & E312 Cover Open Switch Model E310 HVPS Engine/LVPS Board Action 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. 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. Diagnostic Information 2-13

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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.