Toshiba 1550, Service Manual

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Mar. 1998 © TOSHIBA 4 - 1 1550/1560 OPERATION
4. COPIER OPERATION
4.1 Operation Outline
Copier operation Operation during warm up and standby
Automatic-feed copying using Print key
Copying operation Bypass-feed copying
Interrupt copying
4.2 Description of Operation
4.2.1 During warm up
(1) Copy quantity indicator shows "0" and print-key lights up "red" lamp.
Heater lamp comes ON.
Initial position setting for the optical system ~ moves the lens and the mirror to actual-size position.
Exit fan (M8) stops and optical fans (M6/M7) stop.
(2) When the heat-roller temperature is sufficient for fixing:
The heater lamp goes OFF.
The copy quantity indicator shows "1", and the print key changes to "green" lamp.
(Paper jam release cover to be closed when there is paper in the cassette.)
Exit fan (M8) starts rotating at low speed and optical fans (M6/M7) stop.
4.2.2 Standby (ready) condition
All keys on the control panel are operable.
When there is no other key entry for a predetermined period, the machine is set automatically to a copy
quantity of "1", a reproduction ratio of 100% and automatic exposure.
4.2.3 Cassette feed copying using the print key
(1) Print key ON
Print key display changes from "green" to "red".
Main charger, transfer charger, separation charger, transfer bias, discharge lamp and LED eraser
array come ON and optical fans (M6/M7) rotate at high speed. Exit fan (M8) starts rotating at high
speed.
Main motor (M1) comes ON.
~ Drum, developer, heat roller and paper-exit roller rotate.
(2) Paper feeding from cassette
The feed roller clutch (CLT2) and the pick-up roller clutch (CLT3) come ON.
~ The pick-up roller and paper feed roller rotate.
After a pre-difined period the pick-up roller clutch (CLT3) goes OFF.