C6501 - K Write Unit Code (C-4721)

[jma676]

Anything else and finally to end with these quotes:

MPC Control - Service Manual:


Image Stabilization Control

Vm adjustment

(1) Purpose

* To achieve stabilized intermediate exposure potencial regardless of drop in sensitity of photosensitive materials or the stain of the wrinting system.

(2) Operation

* While the drums are irradiate whit a PWM128 intensity laser beam, the electric potencial on the drums are detected by the drum potencial sensor /Y (DPRS/Y), /M (DPRS/M), /C (DPRS/K). According to the detected results, the laser MPC Value is Corrected.



I hope you is not the case using the following method: Writing Init. Pos Memory ( Printer Adjustmen )

[jma676]

back a touch of reputation

[Avalon]

Did you set up the laser after you fitted it ? The manual does not tell you of any adjustments after replacing the laser but do a search in the service manual for the LD bias adjustment. Had to replace a magenta unit on a C6501 last month that was only 5 weeks old !

[jma676]

Ok, so pay special attention to the installation methods

[907tec]

yeah, definitely check out page 1757 of the SM for the calibration/setup sequence. It tells you which adjustments to do and which order to perform them, slightly different for K write unit than for CMY units. That being said, I had no problems at all with installation. Previous tech had removed the lock screw from the K write unit tilt adjust, knocking it out of alignment. Even got lucky with that one and adjusted it by eye with perfect skew afterwards.

[jma676]

Ok I'm glad you could solve it.