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I would try adjusting the Dev Bias as a test. Factory is -550 drop it down to -900 to see if it prints darker. If the prints are darker but the copies are still light next I would adjust scanner gamma. All workarounds we had to come up with working for a company that insisted on using Katun drums and type28 developer on these. But be warned the drum cavity will get dirty real quick and toner will build up around mag roller if you have to adjust the Dev bias that low. Parts also won't reach yield
Clean the machine's air/ozone filters, and the ID sensors. Do a forced toner supply till the image looks like you want it, then reset developer again. If the forced toner supply does not increase the image density, then your problem may be a toner supply, or drum ground issue.
You did not say...were the prints ok before you did this work ?
And I'm going to throw this out there...did you put the developer drive gear back on the rear side of the PCU ? And check that the drive (spring loaded) on the copier side is moving in and out freely.
And I'm going to throw this out there...did you put the developer drive gear back on the rear side of the PCU ? And check that the drive (spring loaded) on the copier side is moving in and out freely.
I have had the damned coupling fall off while sliding the PCDU back into the machine.
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