During the hot roller temperature control
sequence, or while the hot roller and
pressure roller were rotating, the
pressure roller center thermistor
measured a value higher than 3.3V 10
consecutive times at 600 ms intervals.
• Pressure roller center thermistor not
positioned properly
• Pressure roller center thermistor connector
loose, broken, defective
• Pressure roller center thermistor defective
• MCU defective
553
A Pressure roller center thermistor error 2
During the hot roller temperature
control sequence, the pressure roller
center thermistor measures a value
lower than 0.2V.
• Pressure roller center thermistor not positioned
properly
• Pressure roller center thermistor connector
loose, broken, defective
• Pressure roller center thermistor defective
• MCU defective
557
C
Applied zero-cross waveform error
The applied power ac frequency was
detected less than 66 Hz more than 10 times.
• Noise on the ac power supply line
559 A Fusing paper jam errors
Three consecutive paper jam errors
occurred in the fusing unit.
Note: This SC code is not issued unless
SP1159 is switched on.
• Paper jam in fusing unit
• Pick-off pawl defective
• Paper scraps in fusing unit
• Exit sensor defective
561 A Pressure roller end thermistor error 1
During the hot roller temperature control
sequence, or while the hot roller and
pressure roller were rotating, the end
thermistor on the pressure roller returned
a digital reading of more than 3.3V.
• Pressure roller end thermistor not positioned
properly
• Pressure roller end thermistor connector
loose, broken, defective
• Pressure roller end thermistor defective
• MCU defective
SC Code Descriptions
197
4
Summary of Contents for Neptune-P1
Page 1: ...Neptune P1 Machine Code G180 SERVICE MANUAL June 2007 Subject to change...
Page 103: ...1 Installation 102 1...
Page 114: ...Rear Cover 1 Rear cover x 2 A 2 Controller cover B x 1 Paper Exit Unit Common Procedures 113 3...
Page 177: ...3 Remove the SFDB A x 2 x 2 standoffs x 2 3 Replacement and Adjustment 176 3...
Page 180: ...4 Remove the cooling fan D x3 x1 Others 179 3...
Page 402: ...Toner End Recovery Flow Chart Development 401 6...
Page 449: ...6 Details 448 6...
Page 457: ...MEMO 456...