Error Messages, Codes, and Procedures 3-27
Fuser Failure - U4-1 On Time
Note
Following display of this error, leave power applied for 7 minutes, then cycle
printer power. If the error reoccurs, procede with troubleshooting procedure.
The Fuser failed to reach temperature within the warm-up period. Possible faults are:
■ During the Warm-Up period, the Control Thermistor does not detect the
Ready temperature even when the specified time has passed.
■ During the Standby period, the Control Thermistor does not detect the
required temperature even when the specified time has passed.
■ During the Standby period, the Control Thermistor does not detect the
required temperature even when the specified time has passed.
■ During idling after power-on, the Control Thermistor does not detect the
idling stop temperature even after the specified time has passed.
■ During print, the Control Thermistor does not detect the required
temperature even when the specified time has passed.
4
Check the Laser connections.
Are P/J130, P/J620 and P/J406
connected?
Go to Step 5. Connect P/J130,
P/J620 and P/
J406.
5
Check continuity between the Laser and
the Engine Logic Board.
Is there continuity on each wire
between P/J140 <=> P/J406?
Go to Step 6. Repair the wiring.
6
Check continuity between the Laser and
the Engine Logic Board.
Is there continuity on each wire
between P/J130 <=> P/J406?
Go to Step 7. Repair the wiring.
7
Check for +5 V to the Laser.
Is there +5 V across P/J140-8 (+) <=>
ground?
Go to Step 8. Replace the
Engine Logic
Board
(
page 8-89).
8
Check for +24 V to the Laser.
Is there +24 V across P/J130-5 (+) <=>
ground?
Replace the Laser
assembly
(
page 8-74).
Replace the
Engine Logic
Board
(
page 8-89).
Scanner Motor Troubleshooting Procedure (Continued)
Step Actions and Questions Yes No
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