How Can We Help?

C3903 (bizhub 958/808)

Posted
ByAdministrator Administrator
You are here:

Contents

Trouble
type		C3903: Thermostat breaks detection
RankA
Trouble
detection
condition		The motor lock signal remains HIGH for a predetermined continuous period of time while the motor is turning.
Trouble
isolation		–
Relevant
electrical parts		• Fusing unit
• Fusing belt thermostat (TS1) (bizhub 958, bizhub PRO 958)
• Heating roller thermostat (TS1) (bizhub 808/758)
• IH power supply unit (IHPU)
• Noise filter (NF1)
• MFP board (MFPB)

 Procedure

  1. Check the fusing unit for correct installation (whether it is secured in position).
  2. Check the open/close operation of the upper right door.
  3. Check the fusing unit-MFPB CN30E for proper connection and correct or change as necessary.
  4. Check the connector between NF1 CN2-IHPU CN1 for proper connection and correct as necessary.
  5. Check the connector between IHPU CN8-MFPB CN18E for proper connection and correct as necessary.
  6. Replace the fusing unit. ( 958)A796R71422 )( 808)A795R72922 )
  7. Replace IHPU. (958)( A796M40B00 )(808)( A8KNM40A02 )
  8. MFPB F3E conduction check
  9. Replace MFPB. ( A796H02003)
  10. Replace NF1. (958)( A796M40H00 )(808)( A795M40J00 )

Please search Knowledge Base articles and Bulletins as they may contain relevant information and updated Part information such as Part numbers.

(Link to the Field Service Manual) K.3.9.17.

Table of Contents