
MX-3114N OPERATIONAL DESCRIPTIONS 13 – 49
B. Outline of operations
This machine employs the fusing system by the belt.
The features of the belt-type fusing system are as follows:
1)
Short warm-up time
2)
Low power consumption
3)
Wide nip providing high fusing capability
C. Heater lamp driving
The surface temperature of the heat roller and the fusing belt
detected by the fusing temperature sensor is sent to the PCU. If the
temperature is lower than the specified temperature, the heater
lamp lighting signal is sent from the PCU to the heater lamp drive
circuit in the HL PWB.
When the power triac in the heater lamp drive circuit is turned ON,
the AC power is supplied to the heater lamp to light the lamp and
heat the fusing belt.
A thermostat is provided as a safety device against an abnormally
high temperature in the heat roller and the fusing belt.
When the thermostat is opened, the AC power supply to the heater
lamp is cut off.
The heater lamp is arranged to fusing roller (F1) and fusing roller
(B).
In heater lamp (HL_UM/US), two lamps are integrated into one.
Heater lamp operations
D. Fusing operation
Color toner (Y, M, C, and K) on paper is heated and pressed by the
fusing belt, fusing roller (F2), and fusing roller (B) to be fused on
paper.
Toner in the four layers on the paper is fused by heating from up
and down and both sides.
The fusing belt, fusing roller (F2) which is provided with the cushion
layer, and fusing roller (B) realize the following operations.
1)
The nip amount is increased and the heat capacity to paper is
increased.
2)
By pressing with the flexible roller, toner of many layers can be
fused without being deformed.
3)
An even pressure is applied to rough surface of toner (due to
the multi-layer composition).
Signal name
Name
Function/Operation
FUFM
Fusing cooling fan
Cools the fusing section and the paper exit section.
FUM
Fusing motor
Drives the fusing section.
HL_LM
Heater lamp (HL_LM)
Heats the fusing roller (B).
HL_UM/US
Heater lamp (HL_UM/US)
Heats the fusing roller (F1), and fusing belt.
HLPCD
Fusing pressure detector
Detects the fusing pressure state.
PRM
Fusing pressure control motor
Controls ON/OFF of the fusing roller pressure.
TH_LM_IN
Fusing temperature sensor
Detects the surface temperature of the fusing roller (B).
TH_UM_IN
Fusing temperature sensor (Main)
Detects the surface temperature at the center of the fusing belt.
TH_US_IN
Fusing temperature sensor (Sub)
Detects the suffered temperature at the edge section of the fusing belt.
TS LM
Thermostat LM
Shuts down the heater lamp (HL_LM) circuit when the fusing section is overheated.
TS UM
Thermostat UM
Shuts down the heater lamp (HL_UM) circuit when the fusing section is overheated. (Center section)
TS US
Thermostat US
Shuts down the heater lamp (HL_US) circuit when the fusing section is overheated. (Edge section)
WEBEND
Web end detector
Detects web end of the fusing unit.
No.
Name
Function/Operation
1
Fusing roller (F1)
Heats the fusing belt.
2
Fusing roller (F2)
The cushion layer of the roller forms a wide nip between the fusing belt and fusing roller (B).
3
Fusing roller (B)
Heats the back surface of paper to fuse toner on the paper.
4
Fusing web roller
Cleans the fusing roller (B) and the fusing belt.
5
HL control PWB
Drives the heater lamp.
6
Discharge brush
Discharges static electricity generated in the fusing section to the ground.
7
Separation plate
Separates the whole surface of paper. (non-contact)
8
Separation pawl
Separates fusing roller (B) when it is attached.
9
Fusing belt
Heats the front surface of paper to fuse toner on the paper.
Heater lamp
Operation
Heater lamp
(HL_UM)
Heats fusing roller (F1) and the fusing belt.
Heater lamp
(HL_US)
Heats fusing roller (F1) and the fusing belt.
Turns ON continuously when in warming up.
Heater lamp
(HL_LM)
Heats fusing roller (B). Does not turn ON while heater
lamp (HL_UM) and heater lamp (HL_US) light up.
Fusing belt
Fusing belt
Fusing roller (F2)
Fusing roller (B)
Fusing roller
(F2)
Fusing roller
(B)