Panasonic UF-5500 Service Manual page 60

UF-5500 / 4500
6.12.9.2. Drum Detection
Detection Flowchart
The drum unit should be judged whether
it is old or new;
• when Power is ON.
• when exchanging the drum unit.
Is the drum unit installed?
YES
Turn the Engine Motor ON.
Judging the unit old or new
Is the toner
detection signal varied within
4.0 sec?
YES
The unit is old.
The fixed number is added to
the counting.
Is the paper
counted up to 5,500 or
the rotation counted up to
8,700?
NO
Return to the start.
NO
"INFO CODE=045" is displayed.
Is the toner
NO
detection signal varied within
4.0 to 7.4 sec?
The unit is new.
Restart the counting.
Return to the start.
YES
"DRUM LIFE LOW REPLACE SOON" is displayed.
Is the paper
counted up to 6,000 or
the rotation counted up to
9,500?
Return to the start.
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*1 When the power is turned ON,
the initial operation should be done.
If the cover is open when the power is turned ON,
the initial operation should be done after the cover
is closed.
*2 When the power is ON, the initial operation should be
done only in case that the drum unit is exchanged.
When the signal is not varied for over 7.4 sec;
NO
"INFO CODE=045" is displayed.
YES
<When the unit is new>
After the unit is found new, how often
HI/LOW switched (the number of rotations
Reset the counter.
of the paddle) and the number of printed
papers are counted.
(They are capable of being printed in the
service history.)
The counting starts all over again after
resetting the counter.
<When the unit is old>
The unit keeps counting continuously.
*The display is showed at all times,
yet it can be disappeared.
YES
"REPLACE DRUM" is displayed.
NO
The display is showed at all times.
*The unit does not execute the
compulsory STOP.
*The display can be
disappeared.