[CQ] WC7775; High frequency banding

[Ianizer]

Here's my issue, in brief. I'll expound later as requested or as I think of anything...

HF (approx. 8 lines per mm) K only digital banding, edge-to-edge (extends outside of image write area). Appears as uniform background to the naked eye.

IQ issue presents very light after about 40-60 Letter sized sheets; copy, print, simplex, duplex, color or b&w; gets progressively darker through 100 click test runs. Very uniform progression (looking at fanned stack edges looks like grayscale fade).

Steps taken
Reseated several connectors; 2nd BTR, LVPS, drum motors, developer bias, etc... The standard stuff.

Swapped transfer belt hv unit.

Currently waiting for parts: K developer, dev. housing & drum.

Thoughts?
-I

[xcopytech]

Re: WC7775; High frequency banding

Replace black-cyan ROS (laser)

[4copyprint]

Re: WC7775; High frequency banding

try interchanging ym laser with ck laser for testing purpose only. if problem shift to magenta replace k laser. black will not come proper bcaz of ym ros it print in strips not complete patch from inboard to outboard due to change in design of both the laser.

[Ianizer]

Okay... Huh?

K/C ROS is shaped differently than M/Y ROS... Thus, it no fit in da hoal! How me sposeda test??

Anyway, I've got a new ROS to drop in tomorrow (and a dev. housing as a long shot).

Wish me luck.

-I

[RockETop]

Re: WC7775; High frequency banding

Getcha a K DV drive unit too......

[Ianizer]

Getcha a K DV drive unit too......

Usta carry one. Generally manifests a little differently. I'm looking squinty-eyed at the dev. drive for this particular issue... Sell me.

On the way to customer now... Crossing all that's crossable.

-I