Panasonic FP-7818 Service Manual & Parts Manual page 115

(9) U12: Sorter with stapler
*When the stapler mode is selected, and a staple cartridge is not inserted.
(10) U13: Toner level detection
*"U13" does not reset after replacing the toner bottle.
Is the toner caked in the bottle?
NO
Is the output signal of the toner level detecting
sensor approximately 4V?
(11) U14: Waste toner bottle full
Is the waste toner bottle full?
(12) U16: Developer unit failure
Is the developer unit installed in the
copier securely?
(13) U17: Sorter transport cover failure (FA-S680)
The copier does not indicated READY TO COPY when the transport cover is closed.
Is the transport cover closed securely?
YES
Does change voltage of sorter CPU PUB J4-2 (FCVRSW)
when the cover open/close
switch is turned on or off?
YES
Sorter CPU PUB is defective.
(14) U18: Copy usage is upper limited
Please consult department key operator.
5-38
YES Shake the toner bottle well.
or
Change the toner bottle.
NO Check DC5V of CPU CN113-7, 8, 9.
NO: Check all DC5V lines.
YES: Toner level detecting sensor is
defective.
YES Replace the waste toner bottle.
NO Install the developer unit securely.
(or check the CN7 on CPU PCB connection)
NO Close the sorter transport cover securely.
NO Cover switch is defective.