Developer Refreshing Mode - Kyocera FS-1900 Service Manual

(6) Developer refreshing mode

This mode is used to eliminate light printing problems. Once activated, the toner in the developer
unit is enforced to be sent onto the drum unit, collected back in the waste toner bottles. At the same
time the new toner is fed in the developer so that the developer unit is refilled with new toner. Once
activated, the printer will keep engaged in this mode and be running for an average of 60 minutes.
NOTE The amount of the (old) toner replaced and collected in the waste toner bottle
will be approximately 100 g. The waste toner bottle consequently become full
and must be replaced with a new one.
Perform in sequence:
1 Turn printer power on.
2 Make sure the printer is Ready.
(Connect the printer to the computer using the parallel interface.
3 At the DOS prompt, send the following command to the printer:
>ECHO !R!EXTP 7,92;EXIT;>PRN
4 Turn printer power off, then on. The toner refreshing mode will
begin. The old toner will be rejected in the first approximately 20
minutes, followed by another 40 minutes interval in which the new
toner is fed in the developer unit.
5 Check that the display reverts to Ready.
(If the display shows "Call service 7350", refer to
section 6-1-2 Diagnostic (Service error messages) on page 6-11.
6 Print a page to check the print density.
(If the print density is too dark (gray background), change the
"Print Density" setting in the menu selection to 1 or 2 steps lighter.
(Default is 3.) Refer to printer's User's Manual for details.
Note: To cancel the toner install
Paper size
switch
mode during in this mode first
turn power off, press and hold
all three paper size switches, and
turn power on until message
changes to Ready.
3-15
Display shows:
Ready
Please Wait
(Adding toner)
Ready
Print density
03
FS-1900