d-Color MF4003/MF3303
L TROUBLESHOOTING > 3. TROUBLE CODE
L-37
Trouble isolation
-
Relevant electrical parts
• Fusing unit
• C3722: Heating roller thermistor/Edg (TH1)
• C3725: Heating roller temperature sensor (TEMS)
• C3726: Heating roller thermistor/Ctr (TH2)
• DC power supply (DCPS)
• CPU board (CPUB)
• Base board (BASEB)
Procedure
1.
Check the fusing unit for correct installation (whether it is secured in position).
2.
Check the open/close operation of the right door.
3.
Check the connector between the fusing unit-relay CN3-BASEB CN10E for proper connection and correct as necessary.
4.
Check the connector between the fusing unit-relay CN2-DCPS CN2 for proper connection and correct as necessary.
5.
Check CPUB for proper installation and correct as necessary.
6.
7.
8.
9.
3.9.4 C3731
Contents
Trouble type
C3731: Fusing abnormally high temperature detection (hard protector)
Rank
A
Trouble detection condition The hard protector signal malfunction is detected for a predetermined continuous period of time or more.
Trouble isolation
-
Relevant electrical parts
• Fusing unit
• Heating roller thermistor/Edg (TH1)
• Heating roller temperature sensor (TEMS)
• Heating roller thermistor/Ctr (TH2)
• DC power supply (DCPS)
• CPU board (CPUB)
• Base board (BASEB)
Procedure
1.
Check the fusing unit for correct installation (whether it is secured in position).
2.
Check the open/close operation of the right door.
3.
Check the connector between the fusing unit-relay CN3-BASEB CN10E for proper connection and correct as necessary.
4.
Check the connector between the fusing unit-relay CN2-DCPS CN2 for proper connection and correct as necessary.
5.
Check CPUB for proper installation and correct as necessary.
6.
7.
8.
9.
3.9.5 C3825, C3826
Contents
Trouble type
• C3825: Fusing abnormally low temperature detection (Main of the heating roller)
• C3826: Fusing abnormally low temperature detection (Center of the heating roller)
Rank
A
Trouble detection condition
• C3825: The heating roller temperature sensor (TEMS) continues to detect a temperature lower than a
predetermined one for a predetermined period of time.
• C3826: The heating roller thermistor/Ctr (TH2) continues to detect a temperature lower than a predetermined
one for a predetermined period of time.
Trouble isolation
-
Relevant electrical parts
• Fusing unit
• C3825: Heating roller temperature sensor (TEMS)
• C3826: Heating roller thermistor/Ctr (TH2)
• DC power supply (DCPS)
• CPU board (CPUB)
• Base board (BASEB)
Procedure
1.
Check the fusing unit for correct installation (whether it is secured in position).
2.
Check the open/close operation of the right door.
3.
Check the connector between the fusing unit-relay CN3-BASEB CN10E for proper connection and correct as necessary.
4.
Check the connector between the fusing unit-relay CN2-DCPS CN2 for proper connection and correct as necessary.
5.
Check CPUB for proper installation and correct as necessary.
6.
7.
8.
9.
DCPS F102 or FU181 conduction check.
Y119930-3
Service Manual
Содержание d-Color MF 4003
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