General Troubleshooting 4-11
Paper Size Switch Assembly
Paper size and tray installation is detected by a combination of ON/OFF statuses of
the upper, middle, and lower switches of the Switch Paper Size Assembly. Inability of
the printer to detect the paper size loaded, or to detect the presence of the paper tray
can be the result of a bad switch.
3
Turn off the printers power for a full 5
minutes then re-run the engine only test
print.
Does the Test Print run successfully?
Complete. Go to Step 4.
4
Check print engine operation.
Troubleshoot a defective engine, then
troubleshoot the LVPS, Motor Driver
board, or a motor / clutch connected to
the engine.
Refer to the Wiring Diagrams, while
unplugging the various motors, clutches,
and solenoids until the fan stays running
and the LVPS maintains its outputs.
Is the LVPS outputs restored?
Replace the
component isolated
during testing.
See "Fault
Isolation" on
page 4-9.
Paper size Switches
Upper Middle Lower
LEGAL14" ON ON ON
LEGAL13" ON ON OFF
EXECUTIVE ON OFF ON
B5 ON OFF OFF
A4 OFF ON ON
A5 (for reference only, supported in Tray 1 only) OFF ON OFF
LETTER OFF OFF ON
No Tray OFF OFF OFF
Troubleshooting Procedure Table (Continued)
Steps Action and Questions Yes No
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