Toshiba e-STUDIO 2555C Service Manual page 695

[C4E0] Fuser pressure roller release abnormality
[C4E1] Fuser pressure roller contact/semi-contact abnormality
Classification
Fuser unit related service call
Check item
Pressure roller contact/release
detection sensor (S27, S28)
Pressure roller contact/release motor
(M13)
Fuser unit
LGC board
Replace parts
Pressure roller contact/release
detection sensor
Pressure roller contact/release motor
LGC board
[C4E2] Fuser belt rotation detection sensor abnormality
Classification
Fuser unit related service call
Check item
Fuser unit
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The releasing behavior of the pressure roller cannot be
detected/the abnormality of the sensor of the fuser unit (rear/
color of harness: blue) (C4E0)
The contacting/semi-contacting behavior of the pressure
roller cannot be detected/the abnormality of the sensor of the
fuser unit (front/color of harness: blue) (C4E1)
• Sensor check
(Perform the input check: 03-[FAX]ON/[2]/[G], 03-
[FAX]ON/[2]/[H])
• Connector check (J1116, J1117)
• Harness check
• Motor check
(Perform the output check: 03-272)
• Connector check (CN353)
• Harness check
• Drawer connector check
• Thermostat check
• Unit check
• Connector check (CN355, CN356)
• Board check
The fuser belt does not rotate or does so incorrectly/the
abnormality of the sensor of the fuser unit (front/color of
harness: yellow)
• Fuser belt rotation detection sensor check
(Input check: 03-[ALL]OFF/[6]/[A])
• Connector check in the fuser belt rotation sensor
• Harness check in the fuser belt rotation sensor
• Rotation detection plate (rotor) check
• Grease check in the gear (shaft / tooth flank)
• Fuser belt check
• Check if the bushing of fuser belt drive shaft is worn.
• Fuser unit installation check (Check that the levers fixing
the fuser unit are lifted up.)
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Error item
Measures
Remarks
Error item
Measures
e-STUDIO2555C/3055C/3555C/4555C/5055C
ERROR CODE AND TROUBLESHOOTING
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