72-21 (bizhub 750i)

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

When FS-539 or FS-539SD is installed

Contents

JAM type	Misfeed at FS transport section (When FS-539 or FS-539SD is installed)
JAM code	72-21
JAM detection timing	72-21: The alignment tray paper detection sensor (PS31) is not turn OFF even after the set period of time has elapsed after the start of exiting paper.
Misfeed processing location	Front door
Relevant parts	-Pre-eject drive motor (M9) -Alignment tray paper detection sensor (PS31) -FS control board (FSCB)

Procedure

Step	Action	Control signal	Location of electrical component
1	Initial check items	–	–
2	PS31 I/O check, sensor check	FSCB J12-11 (ON)	FS-539/FS-539SD 7-C
3	M9 operation check	FSCB J13-3 to 4	FS-539/FS-539SD 17-C
4	Replace FSCB. (Part# AAR4PP8201)	–	–

 When FS-540 or FS-540SD is installed

Contents

JAM type	Misfeed at FS transport section (When FS-540 or FS-540SD is installed)
JAM code	72-21
JAM detection timing	72-21: The alignment tray paper detection sensor (PS32) is not turn OFF even after the set period of time has elapsed after the start of exiting paper.
Misfeed processing location	Front door
Relevant parts	-Pre-eject drive motor (M2) -Alignment tray paper detection sensor (PS32) -FS control board (FSCB)

Procedure

Step	Action	Control signal	Location of electrical component
1	Initial check items	–	–
2	PS32 I/O check, sensor check	FSCB J21-12 (ON)	FS-540/FS-540SD 4-D
3	M2 operation check	FSCB J22<A>-3 to 4	FS-540/FS-540SD 1-D
4	Replace FSCB. (Part# AAR5PPD401)	–	–

(Link to the Field Service Manual)