Toner Sensor Service Check - Lexmark T632 Service Manual

Stapled sheets are not transported to the output tray.
FRU
1 Sol 2 (stapler gearbox
assembly)
Stapler card assembly
POST incomplete—stapler cycles several times
FRU
1 Stapler assembly

Toner sensor service check

Service tip: Check the print darkness menu setting before checking the toner sensor.
This service check is intended to be used when a 929 Service Error displays.
FRU
1 Developer drive assembly
2 Front harness cable
3 Toner sensor
Action
Disconnect Sol 2 cable from J8 on the stapler card and measure the
resistance of the solenoid across the cable connector. It should
measure approximately 48 ohms (cold). If incorrect, replace the
stapler/finisher option assembly. If correct, replace the stapler card
assembly.
Action
Replace the stapler assembly.
Note: When replacing the stapler assembly, observe the location of
the ground lead from the stapler assembly and the finisher frame,
and make sure the ground lead is correctly reattached.
(Flag or spring off stapler unit)
Will also happen when pin 7 of J3 is open.
Action
Incorrect operation of the developer drive assembly can cause the
printer to display a 929 error code (Toner Sensor). Check the
developer drive assembly for correct installation, any sign of worn,
loose, or broken parts.
Check the toner sensor portion of the front harness cable to make
sure it is properly seated into the toner sensor. If correct at both the
sensor and system board (J22), check the continuity of the cable. If
incorrect, replace the cable.
The toner sensor cable is part of the front harness and part of
connector J22 on the system board. Check the voltage at J22-11. It
reads approximately +5 V dc. If incorrect, replace the system board.
If correct, check the voltage at J22-12. It reads approximately +5 V dc
with the system board removed from the printer. If incorrect, replace
the system board. If correct, replace the toner sensor assembly. A
bad ground connection between J22-13 on the system board and pin
3 on the toner sensor results in a 929 service error.
4060-xxx
Diagnostic information
2-93