17 January, 2003
PRINTER ENGINE SERVICE MODE
5-39
Service
Tables
3
Mode No.
(Class 1, 2, and 3)
Function / [ Setting ]
[Forced Tnr Ref]
Forced Toner Refresh
Perform forced toner refresh mode.
When the developer has deteriorated or when prints are made in a very low humidity
condition, dirty background may appear continuously.
When this kind of dirty background appears, check whether or not the development
gamma is within the target (SP3-120 and 121). If the development gamma is not within the
target, do this SP mode.
The machine automatically does the toner refresh mode in the following sequence.
1. Consumes toner in the development unit without toner supply until toner end is
detected
2. Starts toner recovery mode.
3. Starts process control self-check.
NOTE:
If toner is drastically consumed for a short time, this may cause carrier to flow out.
To prevent this, toner is consumed over a long period of time. (It takes about 20 minutes to
complete this toner refresh mode).
1 Bk
921
2 All
Color
[OPC Refresh2]
922
1 Mode Set
*BCU Specifies when the OPC refresh is executed for
CMY drums, which forcibly creates a temporary
15mm-wide toner line on the drum surface by
applying the development bias (200V) and turning
on the development clutch at the end of a job.
Note that this OPC refresh is a separate process
from the one controlled by SP 3-920 and 3-921.
[ 0
∼
2 / 1 / 1 /step ]
0: Disable (OPC refresh is not executed.)
1: Low coverage (OPC refresh is executed after
an output of low coverage ratio.)
2: Every time (OPC refresh is executed after every
job.)
[P Ctrl Result]
Process Control Self-check Result
975
1 P Ctrl Result
*BCU Displays the result of the latest process control
self-check.
[ 0 to 9999 / - / 1/step ]
All colors are displayed. The results are displayed
in the order “K Y C M”
e.g., 1 1 9 1: The self-check for Cyan failed but
the others were successful
See the troubleshooting section for details.