MX-3114N OPERATIONAL DESCRIPTIONS 13 – 38
(2) Operational descriptions
Toner is attached to electrostatic latent images formed on the OPC
drum surface by laser image beams to form toner images.
Toner and carrier in the developing unit are agitated and trans-
ported by the mixing roller.
By stirring, toner and carrier are negatively charged by mechanical
friction.
The developing bias voltage (AC component and negative DC
component) is applied to the developing roller.
Negatively charged toner is attracted to the exposed section on the
OPC drum where the negative potential falls due to the developing
bias.
If the OPC drum is not exposed, the negative potential is higher
than the developing bias voltage, and toner is not attracted.
The toner sensor detects the toner supply state from the toner car-
tridge.
In this machine, the toner density is detected by the toner sensor,
but the toner supply operation is not controlled only by the toner
density detection result. The toner density control is performed
according to the process control data.
Signal name Name Function/Operation
1TURC_1 Primary transfer separation clutch 1 Controls separation of the primary transfer unit.
BS (K, M, C, Y) Developing bias voltage (K, M, C, Y) Voltage to form toner images on the OPC drum. Controls the developing density.
DVM_CL Developing motor (CL) Drives the developing/OPC drum section (CL).
DVM_K Developing motor (K) Drives the developing/black OPC drum (BK)/transfer section.
TCS_C Toner sensor (C) Detects toner supply from the toner cartridge. Detects the toner density (C).
TCS_K Toner sensor (K) Detects toner supply from the toner cartridge. Detects the toner density (K).
TCS_M Toner sensor (M) Detects toner supply from the toner cartridge. Detects the toner density (M).
TCS_Y Toner sensor (Y) Detects toner supply from the toner cartridge. Detects the toner density (Y).
No. Name Function/Operation
1 Developing roller Attaches toner to electrostatic latent images on the OPC drum and forms toner images.
2 Stirring roller Stirs developer and toner to negatively charge toner.
3 Doctor Maintains the quantities of toner and developer on the DV roller at a constant levels.
4 Toner filter (K, M, C, Y) Prevents toner splash.
5 High voltage PWB (MC/DV PWB) Generates the main charger voltage and the DV bias voltage.
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