Ricoh AC205, Service Manual, Page: 161 / 188

SYSTEM LAYOUT
SM 6-7 B273
Detailed
Des
cription
s
6.2.8 NEW AIO DETECTION
Each AIO cartridge has an ID chip. The machine detects a new cartridge has been
installed when the ID chip is detected.
When a new cartridge is installed in the machine, the machine automatically
detects, via the chip, that the cartridge is new. The machine then resets the total
dot counter (TOTAL TONER COUNT) and CRU print counter (Cru Prints), and
increments the counter for counting the number of CRU replaced (Replaced Toner
Counts). Only in the case of the “Replaced Toner Counts” being at 0, the CRU
currently installed is regarded as a starter CRU. In this situation, threshold to detect
toner end is shorter than that for supply CRU.
6.2.9 TONER END DETECTION
The machine does not have a Toner End Sensor. The machine checks the amount
of toner via software. The machine counts and adds up black dots as toner
consumption. For example, the following occurs when the machine prints 5% of
black rate chart:
•
Starter cartridge: Approx. 4, 750, 000, 000 dots will be added.
•
Supply cartridge: Approx. 7, 500, 000, 000 dots will be added.
When the total number of dots reaches a pre-programmed figure (the same as for
Toner Near-End), the machine shows “TONER LOW”. After another period of dots
has been counted up, the machine finally shows “TONER EMPTY” (the same as
for Toner End), and the machine stops printing.
You can check the total dot counts from the current cartridge in the System Data
List in “TECH” Mode.