HP LJ 2420 Printhead Access

1) Cartridge

2) Tray 2

3) Rear Cover/Door Assembly
> Pull the rear door fully open.
> Two M4x10mm pan head threading screws.
> Two claws within the tray 2 cavity.

4) Formatter Cage Cover
> Force it rearward a bit to free it.

5) Left Side Cover
> Two M3x8mm bright washerhead screws in the handgrip cavity.
> One forward-hooking claw inboard at the upper rear. It’s high up in a rectangular well.
> Two downward-hooking claws at the underside.
> There are two concealed, inaccessible, downward-hooking claws at the top. Tug away at the rear and pry at the top to force those two claws to unhook.

6) Mains Receptacle Bezel
> Treat as if hinged at its outboard long edge.
> There’s a single downward-hooking claw about 3 3/8" below its top edge. If the item is stubborn, slide a thin tool in behind it about 4" below its top edge and move the tool upward. You’ll unhook the claw.

7) Top Right Rear Corner Cover
> One M3x6mm black washerhead screw at the rear.

8) Top Cover
> Four M3x6mm black washerhead screws.
> NOTE that at reinstallation, the front edge of this cover must be hooked in place before lowering it into place.

9) Black Plastic Air Duct Cover P/N RC1-4128
> One claw.

10) Printhead
> Two cable connections.
> Four M3x8mm bright washerhead screws.

To open the printhead for cleaning, there's one M3x8mm pan head threading screw on top and four tabs. With the top cover off the printhead, there's a safety-interlock shutter that's free to fall out.

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