Heaters; Paper Preheater - Tektronix Phaser 340 Service Manual

8
Field Replaceable Unit Disassembly/Assembly

Heaters

Paper preheater

8-20 Phaser 340 Color Printer
Tools required
Magnetic screwdriver
Needle-nose pliers
5/16-inch nut driver
Warning Even when the printer is turned off, AC line voltages may be
present at the printer heaters while the printer is plugged into AC
power.
1.
Turn off the printer and remove the power cord.
2. Remove the top, left -side and right-side covers as explained in the
earlier topic, "Cabinet panels and covers" on page 8-4.
3.
Open the front door and remove the drum maintenance tray.
4. Older printers feature a paper preheater shield held in place with
three screws; remove it. Newer printers feature two ground wires
instead. Remove the two screws securing the two ground wires in
place.
5.
If the printhead is not in its print position next to the drum, rotate the
process motor counter-clockwise to move the printhead to its print
position. Make sure that the tilt cam gear is engaged to the tilt cam
solenoid.
Caution If you remove the process motor drive belt without the printhead
in the print position, the printhead will quickly travel to the print
position and may damage the drum and printhead.
6. Left side: Loosen the process motor drive belt tensioner and remove
the drive belt.
a. Loosen the transfix gear position sensor.
b.
Remove the E-ring securing the transfix gear in place. Then
remove the gear.
c. Remove the screw (below the transfix gear's shaft) securing the
left side of the paper preheater to the engine frame.
d.
Remove the paper preheater drive belt from the left end of the
paper preheater's feed roller.
T-20 TORX tip
T-15 TORX tip