[Electrical] ir 2420l dark black copy problem

[wellrajive]

I am also interchange hvt pcb of another ir 2420l but same peoblem. Any idea of H. V. T pcb repairing. help me please. Sample copy attached. 14352951812191556384393.jpg14352953491321243295062.jpg

[teckat]

Re: ir 2420l dark black copy problem

I am also interchange hvt pcb of another ir 2420l but same peoblem. Any idea of H. V. T pcb repairing. help me please. Sample copy attached. [ATTACH=CONFIG]29605[/ATTACH][ATTACH=CONFIG]29606[/ATTACH]

u tested a good HVT & had same issue

[bineeshgeorge]

Re: ir 2420l dark black copy problem

Drum

[DAG COPIERS & COMPUTERS]

Re: ir 2420l dark black copy problem

Developing unit.

[joaoalfaiate]

[allan]

Re: ir 2420l dark black copy problem

I call that snake skin. Normaly if that hapens there is a current leak between the dev bias and the drum earth somewhere.

Sometimes you will see banding with that pattern.

[teckat]

Re: ir 2420l dark black copy problem

Background Pattern That Looks Like Tree Bark or Tire Tread Tracks


DRUM ISSUE

DRUM.jpg

[Canuck]

Re: ir 2420l dark black copy problem

Broken dev spacer or the like(dev shorted to drum). Used to see this on np1020 (not this extreme though)