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2-31 4059 Service Manual
4059-XXX
Cover Open Switch/Cable Service Check
FRU Action
1 Toner Cartridge Check the toner cartridge to make
sure it is correctly installed and that
the right and left hand 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.
2 Cover Open Switch/Cable
Assembly
Check the cover open switch for
proper mechanical operation. If
incorrect, repair as necessary.
Disconnect the cover open switch
cable from J4 at the engine board
and measure the voltage at J4-3. It
measures approximately +5 V dc. If
the voltage is incorrect, replace the
engine board. If the voltage is
correct, check the voltage at J4-1. If
the voltage measures greater than
+1.0 V dc, replace the engine board.
If the voltage is correct, check the
continuity between J4-1 and J4-3 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 engine board.
Note: It is easier to check the
voltages on J4 with the controller
board removed.