Friday, October 8, 2010

HP LJ 4350tn -- Tray 1 Pickup Assembly Removal

1) Cartridge

2) Tray 2

3) Back Door Open

4) Top Rear Cover
> Pull it straight up.

5) Right Side Rear Cover
> Pull it straight back.

6) Cartridge Engagement Arm
> Disconnect it from the toner cartridge access door.

7) Top Cover Assembly
> Four M3x8mm washerhead screws.
> Lift the cover about an inch.
> Control panel cable connection.
> Lift the cover away entirely.

8) Formatter Cage Door
> Open it and lift to remove.

9) Right Side Cover
> One large claw at upper rear.
> One claw at arrowhead in front behind tray 1 door.
> One claw at arrowhead in front just below tray 1 door.
> MIND THE SWITCH LINK'S ENGAGEMENT when reinstalling this cover.

10) Left Side Cover
> One claw at upper centre.
> One claw at arrowhead in front behind tray 1 door.

11) Tray 1 Door
> Spread the platform ways to separate the door from the platform. The door slides rightward off its hinge pins.

12) Tray 1 Platform w/Torsion Spring
> Free the upper end of the torsion spring. Lower the platform.
> Tug on the paper-out sensor's cowl to free it.
> Lower the platform to where it will slip off its left side hinge pin.

13) Wire Bail Over Fan
> Pry it free of its restraint hooks at its rear.

14) Door-Open Switch Cable Connection at J95
> Free the two-conductor cable from its trough. You may have to deal with some cable entanglement.

15) Front Right Side Cover w/Cover-Open Switch
> Three M3x12mm washerhead screws.
> One claw near the right side end of the envelope feeder slot.
> There's one stiff downward-gripping claw low down in back, accessible through a rectangular opening in the steel frame. Pry it upwards to free it.

16) Tray 1 Pickup Solenoid Cable Connection at J79
> Free the two-conductor cable from its trough. You may have to deal with some cable entanglement.

17) Tray 1 Pickup Assembly
> Envelope feeder slot cover.
> Paper-out sensor cable connection at left side.
> Two M3x8mm washerhead screws at the left side.
> Two M4x16mm pan head threading screws, left and right, low down in deep wells.
> Two M4x10mm pan head threading screws, left and right, near the ends of the envelope feeder slot.
> The item is free to come away. Mind the solenoid's cable as you remove it.

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