Ricoh FT7770 Service Manual page 88

30
April, '89
Toner Supply Amount
in Detect Mode:
- Toner End Detection -
The CPU uses
This method is
If the ratio of
CPU determines that it is time to replace the
Toner indicator then starts flashing. When this
supply clutch stays on continuously.
After the indicator starts flashing, the operator
If a new toner cartridge is not added within that 50 copy interval, the-Add
Toner indicator stops flashing and stays continuously on. Also, copying is in-
hibited.
The toner end condition is reset by opening and closing the left door.
Supply Amount
The factory setting is 30 %.
the image density sensor to detect a toner end condition.
effective in both detect and fixed supply modes.
V p to Vsg (Vsp/Vsg x 100) becomes greater than 18.8%, the
S
SP1O-3
toner cartridge.
condition exists, the toner
can make up to 50 copies.
2-32
SP1O-4
-
The Add