When a new PCDU is set in the mainframe, this is detected by the machine as a new PCDU, and the initial µ count (the output from the µ sensor of initial developer setting) is determined after entering the TD sensor initial setting mode. The TD sensor initial setting is done as follows.
- Starting the developer initial setting
The new unit detecting mechanism performs the TD sensor initial setting. - Developer Agitation
The developer is stirred, with the development roller and the transport coil rotating (30 seconds). - Initial µ Count Detection
The machine detects the µ sensor output while mixing the developer, and stores the output as the initial µ count. The followings are the stored data location in machine types.- MP 2555 SP/3055 SP: SP3-030-062 Initial µ count (Line speed 3)
- MP 3555 SP/4055 SP: SP3-030-121 Initial µ count (Line speed 2)
- MP 5055 SP/6055 SP: SP3-030-061 Initial µ count (Line speed 1)
- Vt Calculation
The machine refers to the initial µ count with the above SP according to the machine type and calculates Vt with the difference of the present µ count. - If the initial µ count detected is out of the upper/lower output limit, the machine displays a TD sensor calibration error (SC360-01).
- After replacing an AIT and performing the initial TD sensor setting, the machine forcibly executes the process control.