Toner Near End Detection 1 - Ricoh B202 Service Manual

Toner Near End Detection 1

The controller considers the following information from the TD sensor:
1) The controller checks that the following condition is satisfied ten times
consecutively:
V
REF
NOTE: You can adjust the condition with SP2-212.
2) If the above condition is satisfied, toner is supplied to the development unit.
The messages, "Loading Toner" and "Please wait," show.
3) The controller checks the above condition again.
a) If the condition is satisfied, the controller decides that the machine is in
the toner near end status. The messages, "Toner is almost empty,"
"Replace Toner Cartridge(s)," and "Xxxxx," shows. "Xxxxx" indicates the
color, such as cyan.
b) If the condition is not satisfied, the controller decides that the machine is
not in the toner near end status. The machine resumes its normal
operation.
Toner Near End Detection 2
The controller considers the information from the operation time counter of the
following:
• Toner attraction pump
• Memory chip on the toner bottle
• Toner end sensor.
1) To calculate the toner amount remaining in the toner cartridge, the controller
considers the operation time counter of the toner attraction pump and the
initial amount of the toner (recorded in the memory chip).
2) If the amount reaches the predefined weight (default: 100 g), the controller
checks the signals from the toner end sensor.
NOTE: You can adjust the weight with SP2-212-1 and -2.
a) If the signals indicate the toner amount has fallen to a certain level
(determined by SP 2-212-12 to -15), the controller decides that the
machine is in the toner near end status. The messages, "Toner is almost
empty," "Replace Toner Cartridge(s)", and "Xxxxx," show. "Xxxxx"
indicates the color, such as cyan.
b) If the signals indicate the toner amount is not less than a certain level,
the controller decides that the machine is not in the toner near end status.
The machine resumes its normal operation.
SM
+ 0.4 V < V
T
6-17
PROCESS CONTROL
B202/B178/B180