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© 2012 TOSHIBA TEC CORPORATION All rights reserved e-STUDIO556/656/756/856(Ver03)
OUTLINE OF THE MACHINE
3 - 83
3.15.3 Functions
(1) Cleaning web
The cleaning web is attached touching the fuser roller by means of the web pushing roller to
remove any toner or paper dust that has stuck to the fuser roller during the fusing process. It is
rolled up by the web motor (M4) with its clean surface always touching the fuser roller. It also
contains silicone oil for coating the surface of the fuser roller, which makes it easier to clean up
any toner or paper dust.
The cleaning web rolled around the roller has been made thinner and lengthened. This has
increased the web rolling up speed and improved the cleaning performance. The cleaning web's
cleaning performance is the same as that of the cleaning roller, so this equipment does not have
a cleaning roller.
3.15.4 Fuser Control Circuit
[ 1 ] Configuration
A forcible power OFF circuit is embedded in this equipment. This circuit detects the overheating of the
fuser unit with the thermistors installed on it. When the surface temperature of either the fuser roller or
the pressure roller has exceeded the specified value, the circuit sends the relay ON signal in order to
shut off the power supply throughout the unit.
Fig. 3-50
N L
IH board
LGC board
+5VB
+5VSW
Temperature
control circuit
Coil output
Fuse
AC input
Noise
filter
Breaker
Power cable
IH power source / drive circuit
Control circuit
including CPU
Photocoupler
AC line
DC line
Power supply for photocoupler
Switching signal of power setting
Duty ratio changing signal
IH status signal
IH coil energization permitting signal
Engine CPU
ASIC
IH coil
Fuser roller
Pressure
roller
Center
thermistor
Center thermostatSide thermostat
Rear thermistor
Front thermistor
Pressure roller thermistor
Switching regulator
+5VSW
Relay
+5VSW
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