NEC Super Script 4400 Maintenance Manual page 206

7 .7 .1 Fusing Heater Lamp
Tools
Phillips Screwdriver #1, #2
Disassembly Procedures : See the layout of fuser unit parts.
1. Remove the set screw ST3X6 (1 pc.) of F. cover (L), and F. cover (L).
2. Remove the set screw ST3X6 (1 pc.) of F. cover (R), and F. cover (R).
3. Pull F. terminal (L) of fuser roller side toward you, and remove the fusing heater lamp (400W) from F.
terminal.
4. Pull out the fusing heater lamp (400W) from the fuser roller (inside).
5. Pull F. terminal (L) of back-up roller side toward you, and remove the fusing heater lamp (300W) from F.
terminal.
6. Pull out the fusing heater lamp (300W) from the back-up roller (inside).
Assembly Procedures
1. Prepare a new heater lamp (300W)/(400W). (2 heater lamps come in one set.)
2. Insert the heater lamp (300W) into the back-up roller.
3. Support the electrode of heater lamp with the F. terminal (R) and (L) at the back-up roller side.
4. Insert the heater lamp (400W) into the fuser roller.
5. Support the electrode of heater lamp with the F. terminal (R) and (L) at the fuser roller side.
6. Install F. terminal (L) and F. terminal (R).
Caution!
Do not touch the surface of heater lamp with dirty hands.
Capacity of the heater lamp is different between the fuser roller side and back-up roller side. Each capacity is
marked on the insulator of lamp's electrode.
Fuser roller side: 400W (Length: 342mm)
Back-up roller side: 300W (Length: 332mm)
Replacement Procedures for Maintenance Parts 197