Panasonic DP-8025, Service Manual

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241
DP-8032/8025
2008 Ver. 1.2
6. F-
θ
Lens
This amorphous plastic, molded lens is designed to provide parallel laser light across the surface of the
drum, providing a constant scanning speed.
7. Cover Glass
This prevents a particle of dust invading into the LSU.
6.6.3. Fuser Operation
The paper passes through the Fuser Roller (1026) and is subjected to heat and pressure in the Fuser Unit.
Pressure between the Fuser Roller (1026) and Pressure Roller (1027) fuses or bonds the toner into the
paper.
Fuser Roller (1026)
A Teflon coated roller supplies heat for bonding the toner to the paper. The temperature of the surface is
kept constant at approximately 190
°
C (± 10
°
C) (or 374
°
F).
Fuser Lamps (1043, 1044)
Located in the Fuser Roller (1026) are 2 Fuser Lamps (1043, 1044) that serve as the heat source for the
Fuser Roller (1026).
Thermistor Assembly 1 & 2 (1041, 1042)
A heat sensitive resistor, in contact with the Fuser Roller (1026), monitors the surface temperature and
keeps the temperature at the specified level by controlling the Fuser Lamps (1043, 1044).
Thermostat (1038) and Thermal Fuse (1040)
The Thermostat (1038) and the Thermal Fuse (1040) are installed in the Fuser Roller (1026), providing
an extra overheat protection.
Printer Motor (901)
The Main Motor (907) provides the driving force to the Fuser Roller (1026) through the Fuser Roller
Gears.
Pressure Roller (1027)
Upper Finger (1067)
Pressure Roller (1027)
Fuser Lamps (1043/1044)
Fuser Roller (1026)
Cleaning Web Roller
(1083)
Thermostat (1038)
Thermal Fuse (1040)
Thermistor Assembly
(1041)
Exit Roller (1028)
Recording Paper