Staple Jam Service Check; Transfer Belt Up/Down Service Check - Lexmark C920 Service Manual

5056-XXX

210 Staple jam service check

FRU
1 Stapler
Staple cartridge holder
2 Stapler
Finisher control board
Stapler cable

Transfer belt up/down service check

FRU
1 Belt up/down sensors
Belt up/down actuator
2 Belt up/down clutch
3 Belt up/down lift cams
4 Printer controller board
2-62
Service Manual
Action
Check for jammed staples in the stapler. Clear the staple jam, go
into diagnostic mode, and run a staple test. If the problem recurs,
replace the staple cartridge holder. If this does not resolve the
problem, replace the stapler.
If the error occurs and there is no staple jam, check to ensure that
connectors CN5 on the stapler and PJ1 on the finisher control
board are properly connected. Make sure that the finisher set
switch is activated. Measure for +5 V dc between pins 11 and 12
on stapler connector CN5. If +5 V dc is not present, check for
continuity on the stapler to finisher control board cable. If there is
no continuity on any pin position, replace the cable. If there is
continuity, replace the finisher control board. If +5 V dc is present,
replace the stapler.
Action
Check the transfer belt up/down sensor. Be sure that connector
CN15 is firmly connected to the printer controller board. Replace
the transfer belt unit. Check for a fluctuation between 0 V and +5 V
between pins 7 and 8 while actuating the sensor.
Be sure connector CN11 is firmly connected to the CK1 daughter
board. Replace the belt up/down clutch if necessary.
Check and replace the belt up/down unit if damaged.
If there still is a problem, replace the printer controller board.