Service manual
DRUM UNIT
2-E-1
2 UNIT EXPLANATION
DRUM UNIT
[1] Composition
[2] Mechanisms
The drum unit is an integral assembly consisting of a
drum, charging corona unit, developing unit, cleaning/
toner recycle unit, PCL, and separation claws.
*1 Auxiliary separation
• To prevent paper jamming, three separation
claws are used to separate paper from the
drum forcibly. These separation claws are
pressed against the drum or detached from it
by turning ON/OFF the separation claw sole-
noid (SD4).
• To prevent a specific part of image copied
paper from being stained and to prevent the
drum from being scratched, the swing mecha-
nism slides the separation claws about 5 mm
back and forth in parallel with the drum sur-
face.
*2 Conveyance assistance
The thick paper conveyance ability has been
improved by the use of ratchets.
Charging corona unit
Developing unit
Cleaning/toner
recycle unit
Charging corona unit
PCL
Cleaning/toner recycle unit
TSL
Transfer and separation corona unit
Developing unit
Separation claw solenoid (SD4)
Separation claws
Mechanism Method
Carriage support Fixed rail
PCL/TSL LED
*1
Auxiliary separation Separation claws
*2
Conveyance assistance Ratchet wheel
Separation claw
Separation claw solenoid (SD4)
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