January 2000 © TOSHIBA TEC 2 - 9 FC-22 PREVENTIVE MAINTENANCE
* Notes on the Preventive Maintenance Checklist
∗ 1. Doctor blade cleaning
(a) Cleaning every 30K
Note: This cleaning should be done prior to “automatic removing of developer material”.
(1) Open the front covers, and turn the lever to
the right to make the transfer belt unit move
down.
(2) Remove the toner cartridges (Y, M, C, K).
(3) Remove the processing unit (EPU) and place
it on a flat table.
Note: Make sure there are no projections or parts
such as screws on the table.
(4) Pull out the drum thermistor.
(5) Disengage 4 latches of the developer unit
cover gently and lift the cover up slowly.
Note:Be careful not to allow the developer mate-
rial deposited on the back of the cover to
drop into different-color developer units. (T o
avoid this problem, put paper over the other
developer units not being cleaned now.)
(6) Insert the doctor blade cleaning jig between
the doctor blade and the sleeve, and move
the jig along the blade edge back and forth;
make 3 return movements to clean the doctor
blade.
(7) Reinstall the developer unit cover and the
drum thermistor.
(8) Do steps (4) to (7) for developer unit K or units
Y, M and C.
(9) Reinstall the EPU into the machine, and raise
the transfer belt unit.
(10) Perform the automatic removing of developer
material (adjustment mode 05-392:K, 391: Y,
M, C).