Lexmark E323 Fuser Replacement

Fuser replacement in the E323 is complicated somewhat by the need to remove the charge roller for access to the fuser. Also, the thermistor cable is strung clear across the machine underneath. The bottom pan must be removed to get at it.

1) Cartridge

2) Top Cover
> Two M3x10mm pan head threading screws.

3) Right Side Cover
> Two finger-operable claws in front.

4) Left Side Cover
> One M3x10mm pan head threading screw.
> Two claws in front.

5) Controller PCA Cover
> Four M3x6mm YZD hex washerhead screws.

6) Thermistor Cable at Controller PCA
> Two-conductor cable connection at J14. (Lexmark's service manual claims that there are two thermistors in the E323. The second thermistor allegedly connects to a 'J22'. We know of no such second thermistor.)
> Free the cable from the clamp.

7) Bottom Pan (to free the thermistor cable entirely)
> Set the printer on its back.
> One M3x6mm YZD hex washerhead screw at the left rear.
> Three M3x10mm YZD washerhead threading screws.
> Drop the pan.
> Extract the thermistor cable and temporarily reattach the bottom pan for now. You'll need to open it up again to restring the new fuser's thermistor cable.

8) Controller PCA w/Enclosure
> Thirteen cable connections. Free the cables from the enclosure.
> Three M3x6mm YZD hex washerhead screws outboard of the enclosure.
> Two M3x10mm YZD washerhead threading screws at the upper edge of the PCA.

9) Fan
> Two M3x18mm YZD hex washerhead threading screws.
> Let the fan dangle.

10) Fuser Top Cover
> Two M3x10mm bright pan head threading screws.
> Pry gently in back of the two torsion springs to free the cover.

11) White Charge Roller Clips
> Remove the clips to free the charge roller from the door-mounted levers. Let the charge roller swing over and rest behind the fuser.
> NOTE the different-coloured torsion springs; the brass-coloured spring is at the left.

12) Torsion Spring Ends
> Unhook them to relax their tension somewhat.

13) Charge Roller Pivot Retainers
> One claw at each. Pull them off.

14) Charge Roller Assembly
> It's now possible to free the left side pivot arm, and then the entire assembly.
> Note the pre-tensioned installation of the torsion springs.

15) Fuser Heater Wires
> Two spade terminals.

16) Fuser Ground Wire
> One M3x10mm YZD washerhead threading screw.

17) Fuser
> Free the thermistor cable from the cable clamp nearest the fuser.
> Two M3x10mm YZD washerhead screws.
> Two claws in front.

You'll need to remove the top cover from the replacement fuser before installing it.

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