Sharp MX-6500N / MX-7500N (serv.man24) Service Manual ▷ View online
MX-7500N DISASSEMBLY AND ASSEMBLY 10 – 61
d. Primary transfer belt
1)
Remove the primary transfer cleaner unit.
2)
Remove the screw, and remove the separation pawl unit.
Remove the screw, and remove the guide rail.
Remove the screw, and remove the guide rail.
CAUTION: When removing and installing, be careful not to scratch
the transfer belt with the separation pawl.
CAUTION: When putting the separation pawl unit on a flat surface,
put is with the separation pawl facing upward in order to
prevent against damage on the lead edge of the sepa-
ration pawl.
prevent against damage on the lead edge of the sepa-
ration pawl.
3)
Remove the screw on the front side of the primary transfer
unit. Turn the bearing 90 degrees.
unit. Turn the bearing 90 degrees.
4)
Remove the screw, and slide the plate.
5)
Fold the primary transfer unit 90 degrees to remove the pri-
mary transfer belt.
mary transfer belt.
CAUTION: Handle the primary transfer belt with care so as not to
damage it.
CAUTION: Install the Primary Transfer Belt so that the printed lot
number is at the rear side.
CAUTION: When installing, check to confirm that both ends of the
primary transfer belt are not positioned over the transfer
guide.
guide.
CAUTION: After replacement of the primary transfer belt, perform
the following procedures.
1)
With the primary transfer cleaner unit removed, apply Yellow
toner (CKOG-0345DS51) to the whole surface of the primary
transfer belt.
toner (CKOG-0345DS51) to the whole surface of the primary
transfer belt.
2)
Attach the primary transfer cleaner unit.
3)
Manually rotate the transfer belt drive gear to remove starting
powder from the primary transfer belt clearly.
powder from the primary transfer belt clearly.
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MX-7500N DISASSEMBLY AND ASSEMBLY 10 – 62
e. Primary transfer belt drive roller, Primary transfer belt
follower roller, Primary transfer belt tension roller, Primary
transfer belt idle roller
transfer belt idle roller
1)
Remove the primary transfer belt.
2)
Clean the primary transfer belt drive roller, the primary transfer
belt follower roller, the primary transfer belt tension roller, and
the primary transfer belt idle roller.
belt follower roller, the primary transfer belt tension roller, and
the primary transfer belt idle roller.
f. PTC-opposing roller, registration backup roller, Y support
roller
1)
Remove the primary transfer belt.
2)
Turn back the primary transfer unit.
Clean the PTC-opposing roller, the registration backup roller,
and the Y support roller.
and the Y support roller.
g. Primary transfer roller
1)
Remove the primary transfer belt.
2)
Turn back the primary transfer unit.
Remove the screw, and remove the primary transfer roller.
Remove the primary transfer roller from the holder.
Remove the primary transfer roller from the holder.
h. Primary transfer belt drive gear
1)
Turn the coupling lock 90 degrees, pull out the pin and remove
the primary transfer belt drive gear.
the primary transfer belt drive gear.
(2)
PTC unit
a. PTC cleaner B, PTC cleaner, Charger wire
1)
Remove the front side cover of the PTC unit.
2)
Remove the PTC cleaner B, and remove the PTC cleaner.
CAUTION: When removing and installing, be careful not to catch
the PTC cleaner with the charger wire.
CAUTION: When installing the PTC cleaner B, check to confirm
that the pawl of the PTC cleaner is securely engaged.
CAUTION: After installation, check to confirm that the charger wire
is at the center of the cleaner pad.
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MX-7500N DISASSEMBLY AND ASSEMBLY 10 – 63
3)
Remove the rear side cover of the PTC unit.
4)
Loosen the screw, and remove the round terminal of the char-
ger wire from the mounting plate. Remove the spring, and
remove the charger wire.
ger wire from the mounting plate. Remove the spring, and
remove the charger wire.
CAUTION: To handle the charger wire, hold the round terminal and
do not touch the wire section directly. Be careful to keep
the wire free from dirt, oil.
the wire free from dirt, oil.
Do not twist or bend the wire.
(3)
Registration sensor unit
a. Image registration/Density sensor
1)
Open the shutter, and clean the image registration and the
density sensor.
density sensor.
(4)
Secondary transfer unit
a. Secondary transfer belt follower roller, Secondary transfer
belt, Secondary belt cleaning roller
1)
Remove the screw, and remove the electrode holder.
CAUTION: When attaching the electrode holder, check to confirm
that the roller shaft is inserted into the bearing.
2)
Remove the screw, and remove the positioning shaft and
remove the spring.
remove the spring.
3)
Remove the sholder screw, and remove the secondary trans-
fer belt unit.
fer belt unit.
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MX-7500N DISASSEMBLY AND ASSEMBLY 10 – 64
4)
Unhook the lock for the cleaning roller and remove the clean-
ing roller.
ing roller.
5)
Remove the screw, and remove the holder. Remove the bear-
ing.
ing.
6)
Remove the secondary transfer belt follower roller and the sec-
ondary transfer belt. Remove the bearing of the frame.
ondary transfer belt. Remove the bearing of the frame.
Clean the secondary transfer belt follower roller and the sec-
ondary transfer belt.
ondary transfer belt.
CAUTION: When handling the transfer belt, use enough care to
keep it free from scratches and dirt.
CAUTION: When installing, be careful not to bring the transfer belt
in contact with the frame, etc., and not to break the
transfer belt.
transfer belt.
CAUTION: When attaching the secondary transfer belt follower
roller, insert it from the vicinity of the secondary transfer
belt follower roller.
belt follower roller.
CAUTION: After replacement, apply yellow toner (CKOG-
0345DS51) to the whole surface of the belt.
b. Secondary transfer belt drive roller, Secondary transfer belt
backup roller, Secondary transfer blade contact roller
1)
Remove the secondary transfer belt.
2)
Clean the secondary transfer belt drive roller and the second-
ary transfer backup roller.
ary transfer backup roller.
3)
Clean the secondary transfer blade contact roller.
c. Secondary transfer roller
1)
Remove the secondary transfer belt.
2)
Remove the bearing and the spring, and remove the second-
ary transfer roller.
ary transfer roller.
d. Secondary transfer toner reception seal
1)
Remove the secondary transfer belt unit.
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