Fusing Heater Lamp (Fusing Heater 3 (Us)(Ec)) - Brother HL-3450CN Service Manual

CHAPTER 7 DISASSEMBLY & RE-ASSEMBLY
4.7.3

Fusing heater lamp (Fusing heater 3 (US)(EC))

(1) Remove the fixing screw ST3x6 (2 pcs.) and slide the F cover (B) to the right to remove
it.
(2) Remove the fixing screws with washer M3x6 (2 pc.) from securing the two heater
harnesses. (1st and 3rd harnesses from the left hand side.)
(3) Remove the fixing screws ST3x6 (4 pcs.) to remove the heater support (HR/BR) at the
right hand side.
(4) Remove the screw with washer M3x6 from the heater electrode plate of each lamp.
(5) Pull out the fusing heater lamps from the inside of the back-up roller and fuser roller.
Terminal (L)
Heater
support (HR)
F cover (B)
N
Do not touch the surface of the heater lamp with your hands, the small traces of oil you
leave on the lamp will affect the life of the lamp.
N
The wattage of the heater lamp is different between the fuser roller and the back-up roller.
The wattage is marked on the insulator of the lamp electrode.
Fuser roller:
Back-up roller : 420W
NOTE:
When installing the new fusing unit into the printer, you have to wait approximately for 30
minutes after the unit is installed to allow the fusing oil to circulate in the unit.
Heater support (BR)
Heater harness
560W
Fusing heater lamp
Fig. 7-86
PRECAUTION
7-56
Heater electrode
plate