2-50 Service Manual
4025-XXX
Attendance Message - Toner Low
The EP Cartridge is low on toner and should be replaced.
Logic Control on the MCU PWB sensed that at Main Motor start-up the Toner Sensor was
on for longer than the specified time.
Attendance Message - Insert Print Cartridge
The EP Cartridge is not installed or is not installed correctly.
Logic Control on the MCU PWB sensed that the CRU Interlock Switch was not actuated.
Step Actions and Questions Yes No
1 EP CARTRIDGE REPLACEMENT
Replace the EP Cartridge with a new one.
Does the error code still appear?
Go to step 2 Problem
solved
2 TONER SENSOR TEST
Enter Diagnostic Mode, Base Sensor Test, Toner Empty.
Open the Upper Left Cover.
Install, then remove, a new
EP Cartridge.
Does the Operator Panel LCD display CL when you install
the Cartridge into the printer, and then display OP when
you remove the Cartridge?
Go to step 3 Replace the
“Toner
Sensor” on
page 4-63
3 MCU PWB REPLACEMENT
Replace the “Engine Board (MCU PWB)” on page 4-92.
Does the error code appear?
Go to step 4 Problem
solved
4 The following printer FRUs and areas are associated with this
specific problem. One or more of these FRUs or areas may
have failed partially or completely. If you cannot isolate this
problem using the steps in this Service Check, replace each
FRU or troubleshoot each area listed below, one at a time, until
you isolate and solve the problem.
• Wiring and connectors linking the FRUs
• I/O PWB - Go to “I/O PWB” on page 4-89.
Step Actions and Questions Yes No
1 EP CARTRIDGE CHECK
Open the Front Cover.
Remove, then reinstall the EP Cartridge.
Does the error code still appear?
Go to step 2 Problem
solved
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