Toner Low/Empty Sensor Service Check - Lexmark Optra C710 Service Manual

5016-001

Toner Low/Empty Sensor Service Check

Note: 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 Toner Sensor
Cable
3 Toner Sensor
Action
Incorrect operation of the developer drive
assembly can cause the printer to display a 929
error code. Check the developer drive assembly
for correct installation, signs of wear, or loose or
broken parts.
Be sure the toner sensor assembly cable is
properly seated into the toner sensor.
• If correct at both the sensor and engine board
(J10), 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 J10 on the engine board.
Check the voltage at J1-011. It should read
approximately + 5 V dc.
• If incorrect, replace the engine board.
• If correct, check the voltage at J10-12. It should
read approximately +5 V dc with the controller
board removed from the printer.
• If incorrect, replace the engine board.
• If correct, replace the toner sensor assembly.
A bad ground connection between J10-13 on the
engine board and pin 3 on the toner sensor results
in a 929 service error.
Diagnostic Information
2-97