C1103 (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

Trouble type	C1103: Alignment motor/Fr drive malfunction (When FS-539 or FS-539SD is installed)
Rank	B
Trouble detection condition	-The alignment plate home sensor/Fr (PS12) is not turned OFF (unblocked) after the set period of time has elapsed after the plate drive starts from the home position. -The alignment plate home sensor/Fr (PS12) is not turned ON (blocked) after the set period of time has elapsed after the alignment motor/Fr (M7) is energized when the plate returned to the home position. -The alignment plate/Fr does not reach the specified position within the set period of time.
Trouble isolation	–
Relevant electrical parts	-Alignment motor/Fr (M7) -Alignment plate home sensor/Fr (PS12) -FS control board (FSCB)

Procedure

1. Check the connector between M7-relay CN13-FSCB J4 for proper connection and correct as necessary.
2. Check the connector of M7 for proper drive coupling and correct as necessary.
3. Check the connector between PS12-FSCB J4 for proper connection and correct as necessary.
4. PS12 I/O check, sensor check
   • Control signal: FSCB J4<B>-4 (ON)
   • Location of electrical component: FS-539/FS-539SD 14-C
5. M7 operation check
   • Control signal: FSCB J4<A>-5 to 8
   • Location of electrical component: FS-539/FS-539SD 13 to 14-C
6. Replace M7. (Part# A3EPPP5500)
7. Replace FSCB. (Part# AAR4PP8201)

 When FS-540 or FS-540SD is installed

Contents

Trouble type	C1103: Alignment motor/Fr drive malfunction (When FS-540 or FS-540SD is installed)
Rank	B
Trouble detection condition	-The alignment plate home sensor/Fr (PS9) is not turned OFF (unblocked) after the set period of time has elapsed after the plate drive starts from the home position. -The alignment plate home sensor/Fr (PS9) is not turned ON (blocked) after the set period of time has elapsed after the alignment motor/Fr (M14) is energized when the plate returned to the home position. -The alignment plate/Fr does not reach the specified position within the set period of time.
Trouble isolation	–
Relevant electrical parts	-Alignment motor/Fr (M14) -Alignment plate home sensor/Fr (PS9) -FS control board (FSCB)

Procedure

1. Check the connector between M14-relay CN5-FSCB J18 for proper connection and correct as necessary.
2. Check the connector of M14 for proper drive coupling and correct as necessary.
3. Check the connector between PS9-relay CN5-FSCB J18 for proper connection and correct as necessary.
4. PS9 I/O check, sensor check
   • Control signal: FSCB J18-10 (ON)
   • Location of electrical component: FS-540/FS-540SD 6-D
5. M14 operation check
   • Control signal: FSCB J18-1 to 4
   • Location of electrical component: FS-540/FS-540SD 5-D
6. Replace M14. (Part# A87HPPAD00)
7. Replace FSCB. (Part# AAR5PPD401)

(Link to the Field Service Manual)