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4069-5XX/7XX
Cover Open Switch/Cable Service Check
FRU
1
Toner Cartridge
2
Cover Open Switch/Cable
Assembly
Action
Check the toner cartridge to make
sure it is correctly installed and that
the right and left cartridge tracks are
not loose or broken. Check to make
sure the cover open switch activation
tab on the toner cartridge is not
broken and that the tab correctly
activates the cover open switch
spring.
Check the cover open switch for
proper mechanical operation. If
incorrect, repair as necessary.
Disconnect the cover open switch
cable from J3 at the system board
and measure the voltage at J4-3. It
measures approximately +5 V dc. If
the voltage is incorrect, replace the
system board. If the voltage is
correct, check the voltage at J3-1. If
the voltage measures greater than
+1.0 V dc, replace the system board.
If the voltage is correct, check the
continuity between J3-1 and J3-3 on
the cable. If no change in continuity
occurs as the switch is activated,
replace the cover open switch/cable
assembly. If the continuity changes
as the switch is activated, replace
the system board.
Diagnostic Information
2-49
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