Ricoh FT4215, Руководство по обучению обслуживанию

Страница: 78 / 208

6.9 BLACK TONER END DETECTION
The image density sensor is used to detect a toner end condition in both
detect and fixed supply modes for the black toner.
6.9.1 Near Toner End Condition
When (Vsp/Vsg x 100) becomes greater than 22.5, the toner density
detection cycle changes from every 10 copies to 5 copies.
When this condition is detected three times consecutively, the toner supply
ratio becomes two times the amount of toner supply level 4. The resulting
toner supply ratio is 60%, and the ID sensor data is 236.
Then, when this condition is detected five times consecutively, the CPU
determines that it is the near end condition and starts blinking the Add Toner
indicators.
6.9.2 Toner End Condition
After the Add Toner indicator starts blinking (Near Toner End Condition), the
operator can make 50 copies. If the toner cartridge is not replaced within 50
copies, copying is inhibited and a toner end condition is determined. In this
condition, the Add Toner indicator lights.
Example:
Copy number
Toner density
detection cycle
Vsp/Vsg
x 100
Toner supply ratio
(If SP31 = 0)
Indicator
1st ~ 5th copies 1st copy 22.6 30%
6th ~ 10th copies 6th copy 22.6 30%
11th ~ 15th copies 11th copy 22.6 60%
16th ~ 20th copies 16th copy 22.6 60%
21st copy 21st copy 22.6 60%
Add Toner indicator
starts blinking (near
toner end condition)
l
l
l l
l
l l
l
l l
l
l Add Toner indicator
blinks (near toner
end condition)
71st copy — — —
Add Toner indicator
lights (toner end
condition)
FT4220/4222 2-47 STM