Repair Analysis Procedures
Phaser® 3500 Laser Printer Service Manual
2-15
Close Top Cover
Fuser Failure, Engine Fuser Low Heat Error, or Engine Fuser
Over Heat Error
Laser Failure
2.
1. Verify the sensor and actuator on the
Fuser is operating correctly.
Replace the Main
Board.
Replace the Fuser.
Replace the SMPS.
Step Action and Questions Yes No
1.
1. Visually inspec the top cover and the
top cover actuator.
2. Is the top cover or actuator damaged?
Replace the Top
Cover.
Go to Step 2.
2.
1. Use diagnostics to test the cover open
sensor.
2. Does the sensor function properly?
Replace the Main
Board.
Replace the Sensor.
Step Action and Questions Yes No
1.
1. Does the error report Fuser Failure? Go to Step 2. Go to Step 3.
2.
1. Check the thermistor.
2. Is the circuit open?
Replace the Fuser. Replace the Main
Board.
3.
1. Check the line voltages across the
thermostats.
2. Are they open?
Replace the Fuser. Go to Step 4.
4.
1. Is the Fuser getting power? Replace the Fuser. Replace the SMPS.
Replace the Main
Board.
Step Actions and Questions Yes No
1.
1. Reseat the connections to the laser
and visually inspect the laser unit for
damage.
2. Did this correct the problem?
Complete Go to Step 2.
Step Action and Questions Yes No
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