J4411/J4412/J4413 - Kyocera TASKalfa 7002i Service Manual

J4411/J4412/J4413/J4414/J4415/J4416/J4417/J4419: Duplex sensor 2 stay jam
Duplex sensor 2 does not turn off after turning duplex sensor 1 on or off 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 Opening and closing the
conveying unit
3 Checking duplex sensor 2
4 Checking duplex motor 2
5 Checking the drive parts
6 Checking the connection
7 Replacing the relay PWB
8 Replacing the feed PWB
9 Replacing the engine PWB The engine PWB is faulty.
Assumed cause
The roller, guide, etc. are
not properly attached or
they are dirty, deformed or
worn down.
The drawer connector con-
nected to the conveying
unit is not properly con-
nected.
Duplex sensor 2 does not
operate properly.
Duplex motor 2 does not
properly operate.
The drive from duplex
motor 2 is not properly
transmitted.
The connector is not prop-
erly connected or the wire
is faulty.
The relay PWB is faulty.
The feed PWB is faulty.
7-248
Measures
Clean and correct the con-
veying parts such as the
roller or the guide, and reat-
tach them. If not repaired,
replace them.
Open the conveying unit and
close it completely. If the pin
of the drawer connector
between the conveying unit
and the main unit is dirty or
deformed, clean or repair it.
Turn duplex sensor 2 on and
off manually and check the
indication at U031 [DU2]. If
duplex sensor 2 does not
properly operate, clean and
reattach it and reinsert the
connector. If not repaired,
replace it.
Execute U030 [DU2]. If
duplex motor 2 does not
properly operate, reattach it
and reinsert the connector. If
not repaired, replace it.
Check if duplex motor 2
smoothly rotates by a hand.
Then, clean and reattach the
drive parts if necessary. If not
repaired, replace them.
Clean the terminal of the fol-
lowing wire connectors and
reinsert the connectors.
Replace the wire when it has
no continuity.• Duplex sensor
2 - Relay PWB• Duplex motor
2 - Relay PWB• Relay PWB -
Feed PWB• Feed PWB -
Engine PWB
Replace the relay PWB.
Replace the feed PWB.
Replace the engine PWB.
2WA/2NJ/2RK
Reference
Executing
U031
U030 Exe-
cution
Wiring dia-
gram
Detaching
and Reat-
taching the
engine
PWB