J4701/J4702/J4703; Arrival Jam - Kyocera TASKalfa 7002i Service Manual

J4701/J4702/J4703/J4704/J4705/J4706/J4707/J4708/J4709: Switchback sensor non

arrival jam

The switchback sensor does not turn on during paper feed from cassette 1-7, the duplex section or the MP
tray.
Step Check description
1 Checking the paper con-
veying parts
2 (When the paper skew
occurs) Checking the
paper path
3 (When the paper skew
occurs) Checking the actu-
ator and the spring
4 (When the paper skew
occurs) Checking the con-
veying guide
5 Checking the feedshift
guide
6 Checking exit roller B
7 Checking the switchback
sensor
8 Checking the feedshift
solenoid
Assumed cause
The roller, guide, etc. are
not properly attached or
they are dirty, deformed or
worn down.
The paper is caught with a
piece of paper, etc.
The actuator does not
operate properly.
The paper is caught with
the conveying guide.
Foreign objects such as
toner adhere on the feed-
shift guide
Exit roller B does not
rotate.
The switchback sensor
does not properly operate.
The feedshift solenoid
does not operate properly.
7-254
Measures
Clean and correct the con-
veying parts such as the
roller or the guide, and reat-
tach them. If not repaired,
replace them.
A piece of paper or the for-
eign objects are adhered on
the conveying path, or if the
parts such as the guide or
the actuator has burrs,
remove them.
The actuator or the spring is
deformed, or if not properly
operate, replace it.
Reinstall the conveying
guide. If there are burrs on
the conveying surface of the
conveying guide, remove
them. If not repaired, replace
it.
Clean the feedshfit guide. Or
replace it.
If the drive gear is deformed,
bushing is scraped, replace
the exit roller B drive parts.
Turn the switchback sensor
on and off by a hand and
check the indication at U031
[Exit Paper]. If the switchback
sensor does not properly
operate, clean and reattach it
and reinsert the connector. If
not repaired, replace it.
Execute U033 [Branch Exit]
to check the feedshift guide
operation. If the guide does
not properly operate, reattach
the feedshift solenoid and
reinsert the connector. If not
repaired, replace it.
2WA/2NJ/2RK
Reference
Detaching
and reat-
taching the
exit unit
Detaching
and reat-
taching the
exit unit
Executing
U031
Executing
U033