Kyocera TASKalfa 7002i Service Manual page 1158

J7710: BF vertical conveying sensor stay jam
Object: 4000-sheet finisher with the folding unit
The BF vertical conveying sensor does not turn on after passing the certain time since it turned on.
Step Check description
1 Checking the paper con-
veying parts
2 Checking the BF vertical
conveying sensor
3 Checking the BF paper
entry motor
4 Checking the drive parts
5 Checking the BF main
PWB
6 Checking the DF main
PWB
Assumed cause
The parts such as the roller
or the guide are not prop-
erly attached, or they are
dirty, deformed or worn
down.
The BF vertical conveying
sensor does not properly
operate.
The BF paper entry motor
does not properly operate.
The drive from the BF
paper entry motor 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.
7-298
Measures
Clean and correct the con-
veying parts such as the
roller or the guide, and reat-
tach them. If not repaired,
replace them.
Turn the BF vertical convey-
ing sensor on and off manu-
ally and check the indication
at U241 [Booklet] > [Vertical
Feed]. If the BF vertical con-
veying sensor does not prop-
erly operate, clean and
reattach it and reinsert the
connector. If not repaired,
replace it.
Execute U240 [Booklet] >
[Feed In]. If the BF paper
entry motor does not properly
operate, reattach it and rein-
sert the connector. If not
repaired, replace it.
Check if the BF paper entry
motor smoothly rotates man-
ually. Then, clean and reat-
tach the drive parts if
necessary. 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