Toshiba DP1200, Service Manual

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6. Printing process
(1) Functional diagram
(Basic operation cycle)
Exposure
Main high voltage unit
Saw tooth
Charge
Drum
Cleaning
Cleaning blade
Waste toner box
Paper release Fusing Separation
Heat roller
Heater lamp
Transfer
Transfer charger
Transfer high
voltage unit
Developing
Toner
Developer
Print process
Paper transport route
Semiconductor laser
Manual feed
PS roller
Focus correction lens
Electrode
Synchronization
with drum
Cassette
paper feed
To face
down tray
(20microns thick)
Aluminium drum
Pigment layer
(0.2 to 0.3 microns thick)
An OPC drum is used for the photoconductor.
(Structure of the OPC drum layers)
OPC layer
Main charger
Laser beam
MG roller
Cleaning blade
Drum
Transfer unit
Resist roller
(3) Conditions of occurrence of paper misfeed
a. When the power is turned on:
PPD or POD is ON when the power is turned on.
b. Copy operation
a. PPD1 jam
1) PPD1 does not turn off within 4 sec
after turning on the resist roller.
b. PPD2 jam
1) PPD2 is off immediately after turning on
the resist roller.
2) PPD2 does not turn off within 1.2 sec
after turning off the resist roller.
c. POD jam
1) POD does not turn on within 2.9 sec
after turning on the resist roller.
2) POD does not turn off within 1.5 sec
2.7 sec after turning off PPD2.
DP1200/1500
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