C9401 (bizhub C754e/C654e)

Contents

Trouble type	Exposure LED lighting failure / ROM contents error (MSC)
Trouble code	C9401
Rank	A
Detection timing	• The output from the CCD sensor is a predetermined value or less during CCD sensor gain adjustment. • The wrong model of firmware is detected in the MFP board when the main power switch is turned ON. • The machine type information (Machine, Type) registered to the machine differs from the actual machine type.
Trouble isolation	Scanner
Relevant electrical parts	• LED exposure unit (LA201) • Flat cable (LED exposure unit) • CCD board (CCDB) • Scanner drive board (SCDB) • MFP board (MFPB)

 (2)Procedure

Step	Action	Control signal	Location of electrical components
1	Check the machine type information registered and re-enter as necessary.For details the machine information, see J.2.4 Entering the machine type information.
2	Check the connection between SCDB and LA201, and correct if necessary.	–	–
3	Check the connection between SCDB and MFPB, and correct if necessary.	–	–
4	Check that the connection between CCDB and MFPB, and correct if necessary.	–	–
5	Replace the LED exposure unit (Part# A161M31001Old or Part# A2X0M31000)	–	–
6	Replace the CCD unit (Part# A2X0R72111)	–	–
7	SCDB F1 conduction check	–	–
8	Replace SCDB (Part# A2X0H01A01Old or Part# A2X0H01A12)	–	–
9	Replace MFPB (Part# A2X0H02015)	–	–

• Link to the layout drawings for related parts by each trouble code (S.108. C9401, C9402)

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

K.3.13.1 (Link to the Field Service Manual)