Kyocera TASKalfa 7002i Service Manual page 1155

J7500: Lower BF side registration jam
Object: 4000-sheet finisher with the folding unit
After the lower BF side registration guide shifts in the BF side registration sensor 1 ON direction, the BF side
registration sensor 1 does not turn on when passing the certain time.
Step Check description
1 Checking the lower BF
side registration guide
2 Checking BF side registra-
tion sensor 1
3 Checking BF side registra-
tion motor 1
4 Checking the drive parts
5 Checking the BF main
PWB
6 Checking the DF main
PWB
Assumed cause
The BF width adjustment
lower guide is not properly
installed or it is dirty,
deformed or worn down.
BF side registration sensor
1 does not properly oper-
ate.
BF side registration motor
1 does not properly oper-
ate.
The drive from BF side
registration motor 1 is not
properly transmitted.
The connector is not prop-
erly connected or the wire
or PBW is faulty.
The connector is not prop-
erly connected or the wire
or PBW is faulty.
7-295
Measures
Check if the BF width adjust-
ment lower guide moves
manually and if not moving
smoothly, reinstall it.
Turn BF side registration sen-
sor 1 on and off manually and
check the indication at U241
[Booklet] > [Width Up HP]. If
BF side registration sensor 1
does not properly operate,
clean and reattach it and rein-
sert the connector. If not
repaired, replace it.
Execute U240 [Booklet] >
[Width Test(A3)] or [Width
Test(LD)]. If BF side registra-
tion motor 1 does not prop-
erly operate, reattach it and
reinsert the connector. If not
repaired, replace it.
Check if BF side registration
motor 1 smoothly rotates
manually. Then, clean and
reattach the drive parts if nec-
essary. If not repaired,
replace them.
Reconnect all the connector
to the BF main PWB. Then,
fix or replace the wires if they
are pinched by other part or if
they have any damage.
When the issue is not
resolved, replace the BF
main PWB.
Reconnect all the connector
to the DF main PWB. Then,
fix or replace the wires if they
are pinched by the other part
or if they have any damage.
When the issue is not
resolved, replace the DF
main PWB.
2WA/2NJ/2RK
Reference
Executing
U241
Executing
U240
Detaching
and reat-
taching the
DF main
PWB