C1115 (bizhub C750i)

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When FS-539SD is installed

Contents

Trouble type	C1115: Center fold knife motor malfunction (When FS-539SD is installed)
Rank	B
Trouble detection condition	The center fold knife home sensor (PS108) is not turned OFF (unblocked) or ON (blocked) even after the set period of time has elapsed after the center fold knife motor (M109) is energized.
Trouble isolation	Center Stapling/Half-Fold/Tri-Fold
Relevant electrical parts	-Center fold knife motor (M109) -Center fold knife home sensor (PS108) -SD control board (SDCB)FS control board (FSCB)

Procedure

1. Check the connector between M109-SDCB J11 for proper connection and correct as necessary.
2. Check the connector of M109 for proper drive coupling and correct as necessary.
3. Check the connector between PS108-relay CN26-SDCB J7 for proper connection and correct as necessary.
4. PS108 I/O check, sensor check
   • Control signal: SDCB J7-3 (ON)
   • Location of electrical component: FS-539/FS-539SD 6 to 7-P
5. M109 operation check
   • Control signal: SDCB J11-11 to 20
   • Location of electrical component: FS-539/FS-539SD 2-L
6. Replace M109. (Part# A3ERPP4S01)
7. Replace SDCB. (Part# A3ERPP6J03)
8. Replace FSCB. (Part# AAR4PP8201)

 When FS-540SD is installed

Contents

Trouble type	C1115: Center fold knife motor malfunction (When FS-540SD is installed)
Rank	B
Trouble detection condition	The center fold knife home sensor (PS108) is not turned OFF (unblocked) or ON (blocked) even after the set period of time has elapsed after the center fold knife motor (M109) is energized.
Trouble isolation	Center Stapling/Half-Fold/Tri-Fold
Relevant electrical parts	-Center fold knife motor (M109) -Center fold knife home sensor (PS108) -SD control board (SDCB)FS control board (FSCB)

Procedure

1. Check the connector between M109-SDCB J11 for proper connection and correct as necessary.
2. Check the connector of M109 for proper drive coupling and correct as necessary.
3. Check the connector between PS108-relay CN29-SDCB J7 for proper connection and correct as necessary.
4. PS108 I/O check, sensor check
   • Control signal: SDCB J7-3 (ON)
   • Location of electrical component: FS-540/FS-540SD 6-P
5. M109 operation check
   • Control signal: SDCB J11-11 to 20
   • Location of electrical component: FS-540/FS-540SD 2-K
6. Replace M109. (Part# A3ERPP4S01)
7. Replace SDCB. (Part# A3ERPP6J03)
8. Replace FSCB. (Part# AAR5PPD401)

(Link to the Field Service Manual)