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Electrical Component Defects
Sensors
No.
Sensor Name/
Sensor Board Name
Active
CN No./
Pin No.
Condition
Symptom
1
Drum Phase Sensor
(CMY)
H
CN108/2
Open
SC381
Shorted
2
Drum Phase Sensor
(K)
H
CN107/2
Open
SC380
Shorted
3
Toner End Sensor (K)
Toner End Sensor (M)
Toner End Sensor (C)
Toner End Sensor (Y)
L
CN115/18
CN115/21
CN115/24
CN115/27
Open
Toner end cannot be
detected.
Shorted
Toner end is detected.
4
Transfer Belt Contact
Sensor
L
CN128/21
Open
SC442
Shorted
5
Paper Transfer Roller
Contact Sensor
L
CN128/8
Open
SC452
Shorted
6
TD Sensor (K)
TD Sensor (M)
TD Sensor (C)
TD Sensor (Y)
A
CN108/19
CN109/17
CN108/8
CN109/25
Open
SC372 (K)
SC373 (M)
SC374 (C)
SC375 (Y)
Shorted
7
ITB Rotation Sensor
A
CN128/18
Open
• Automatic line
position adjustment
error: Transfer belt
unit speed cannot
be detected,
causing image
skew.
• SC285
Shorted
6. Troubleshooting
628
Summary of Contents for SP C440dn
Page 1: ...Model Z P2 Machine Codes M257 Field Service Manual April 2015...
Page 2: ......
Page 30: ...1 Product Information 28...
Page 73: ...9 Install the securing holder E 10 Reassemble the machine Tray Heater 71...
Page 86: ...3 Preventive Maintenance 84...
Page 92: ...5 Left cover B Right Cover 1 Open the duplex unit A 4 Replacement and Adjustment 90...
Page 128: ...5 Open the upper cover A 4 Replacement and Adjustment 126...
Page 131: ...4 The left stay A x 4 5 Rear holder bracket A x 2 Image Transfer 129...
Page 139: ...3 Remove the two screws 4 ID sensor board bracket A x 1 Image Transfer 137...
Page 141: ...4 Exit the SP mode Image Transfer 139...
Page 146: ...2 Temperature Humidity sensor A x 1 x 1 4 Replacement and Adjustment 144...
Page 187: ...3 Bracket A x 1 4 Release the paper feed unit A x 1 Paper Feed 185...
Page 201: ...5 Inner left upper cover page 94 6 Paper exit unit holder A x 1 Paper Exit 199...
Page 211: ...6 Release the left arm A x 1 Duplex Unit 209...
Page 215: ...3 Duplex lower guide plate A 4 Duplex upper guide plate A x 7 Duplex Unit 213...
Page 220: ...8 Right and left arms A x 2 each 4 Replacement and Adjustment 218...
Page 221: ...9 Duplex By pass motor bracket with the frame A x 6 10 Guide plate A x 4 Duplex Unit 219...
Page 230: ...Controller Box Removal E HVPS CB Board Right Cover Open F BCU 4 Replacement and Adjustment 228...
Page 245: ...5 Disconnect the connector 6 Disconnect the six connectors x 1 Electrical Components 243...
Page 254: ...4 Replacement and Adjustment 252...
Page 564: ...5 System Maintenance Reference 562...
Page 637: ...Model Z P2 Machine Codes M257 Appendices February 2015...
Page 638: ......
Page 640: ...2...
Page 648: ...1 Appendix Specifications 10...
Page 652: ...MEMO 14...
Page 653: ...MEMO 15...
Page 654: ...MEMO 16 EN...