Does the toner supply clutch rotate?
Yes No
Is the voltage at CN117-2 always 24V ?
Yes No
Replace the toner supply clutch.
Replace the main control board.
Is the toner bottle nearly empty?
No Yes
Install a new toner bottle.
Does the toner bottle drive motor rotate ?
Yes No
Is the voltage at CN121-2 always 24V ?
Yes No
Replace the toner bottle drive motor.
Replace the main control board.
Is the drum charge voltage correction value for the VSP pattern (SP2-003) cor-
rectly set ?
No
If the CB high voltage supply board is the original one, store the
factory setting in SP2-003. If it is not, then store 16 in SP2-003.
Is the copier in fixed supply mode?
No Yes
Change the setting of SP2-208-001 to "3".
Increase the value of the development bias correction for making VSP patterns
(SP2-203) to make the VSP pattern lighter.
FSM 6-19 FT5535/4527/4522
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