Service manual

System Service Mode
D127/D128 3-18 SM Appendix
2302* Transfer Current Switch Timing
2302 1 Lead Edge
[-10 to 10 / 0 / 1 mm/step]
2302 2 Trail Edge
2303*
Transfer Roller Cleaning Bias
Increasing positive or negative current that improves clear of the same
charged toner but attracts the opposite charged one.
2303 1 Positive
[0 to 20 / 10 / 1
A/step]
2303 2 Negative
2308* Transfer Voltage Upper Limiter
2308 1
0: OFF 1: ON
The switch of the limiter for transfer voltage.
2801* Developer Initialization
2801 1 Execute in the case of PCU replacement.
2802 Developer Mixing
2802 1
Initializes the developer and checks the TD sensor output (Vt). The machine
mixes the developer for 2 minutes while reading and displaying the Vt value.
The machine does not initialize the TD sensor output. If the machine has not
been used for a long period, prints may have a dirty background. In a case
like this, use this SP to mix the developer. The message "Completed" is
displayed when the program ends normally.