Utax AK 740, Service Manual

Page: 55 / 207

3N0/3NK/3PD/3PG
1-4-10
Conveying
roller, feed
roller
1. Check the conveying rollers
have no paper dusts, toner,
or foreign objects
stucked.Check a variation of
the external diameter of the
roller or abrasion is not
observed with the coveying
roller.
Clean the conveying rollers or the pollyes.
If variation in the external diameter or abrasion is
observed, replace.
2. Turn the cover safety switch
on and perform U030 - Motor,
U032 - Clutch, and U240 -
Finished, check they operate
normally.
* : At checking the clutch by
U032, confirm that the
roller won't turn when the
motor is turned on.
If the conveying motor or the clutch is inoperative,
replace.
If stained, replace the clutch.
If the clutch is kept turned on due to a tensioned wire,
reroute wires.
3. Check the conveying roller
rotates without overloading.
Check the axle holder or the
roller shaft are not
contaminated.
Check that the spring has not
fallen off and is mounted so
that it is properly applying
pressure against the rollers
or pulleys.
Clean the roller axle or the axle holder.Re-assemble it
while checking the pressure of the spring.
Sensor 1. Check if it does not operate
with smoothness due to an
abnormal move or dropping
off of the actuator of the
coveying switch.
Re-assemble the actuator or the return spring.
2. Check that the surface of the
sensor and the recveptor
black felt pieces are not
contaminated with toner,
paper dusts, etc.
If dirty, clean the sensor or the black felt piece.
3. Perform U031 - Conveying
switch and U241 - Finisher
switch to check the sensors
are normal without flickering,
etc.
If U031has revealed that the sensor is inoperative,
replace the switch.
Check items Check description Corrective measures