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6. Detailed Function Descriptions
Toner End Detection
The machine detects toner end when the toner end sensor detects toner end 3 times in a row 3.1 seconds
after toner was supplied. At this time, "Toner end" is recorded in the ID chip.
Toner End Recovery
The machine detects that the toner bottle was replaced if one of the following events occurs during a toner
end condition:
• The top cover is opened and closed.
• The main switch is turned off and on.
The machine then starts to supply toner to the development unit. After this, the machine resets the toner end
condition.
• When "Toner near end" is detected, "Toner end recovery" is not done. If there is no "Toner end"
information in the ID chip, the machine detects that there is toner in the toner bottle and "Toner end
6
recovery" is done.
Developer Initialization
When the machine detects that a new PCU was installed, it initializes the developer.
To do this, the machine mixes the developer for a few seconds, and adjusts V
sensor) to make V
During PCU initialization, the machine automatically supplies toner because there is no toner in the toner
supply pipe at installation. Then the machine does the process control self-check.
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(TD sensor output) equal to 2.5 ± 0.1 volts. The machine stores this V
T
(control voltage for TD
CNT
as V
.
T
REF
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Table of Contents
Troubleshooting
