When a new PCDU is set in the machine, the machine automatically detects it and enters the developer initial setting mode. The machine then detects the μ count which is an output from the TD sensor (S37)(S38)(S39)(S40). The developer initial setting is done as follows.
- Starting the developer initial setting mode
The new unit detection mechanism triggers the developer initial setting mode.
If the developer initial setting for the PCDU is executed successfully, it will not, subsequently, be automatically executed. (However, it is still possible to execute it manually.) - Agitating the developer
The machine rotates the development roller and transport coil to agitate the developer for 30 seconds. - Detecting the μ count (Initial value)
While agitating the developer, the machine detects the output from the TD sensor (S37)(S38)(S39)(S40), and stores this output as the initial μ count. - Calculating Vt
The machine calculates Vt using the difference of the current μ count while referring to the initial count through SP. - Forced toner supply (only when newly installing the machine)
This step is required only when the machine is newly installed because there is no toner in the toner transport route.
When the developer initial setting is successfully completed, the machine stores the calculated Vt as Vtref. The Vtref is used as a reference the next time the machine performs an initial developer
setting.
SC360-01 through -04 appears if the results of step 3 are as follows:
- The μ count is equal or exceeds the threshold (6480 [counts]).
- The μ count does not match the target threshold (5800 – 6380 [counts]) three times consecutively.
Process Control and MUSIC are forcibly done after developer initial setting when a PCDU is replaced.