This celluloid-like calibration disk had huge clots of ink on it.Which explained why the line feed banding was occurring in regular intervals - as the obscured portions passed under the sensor, the printer could not calibrate it's feedFortunately, I ...
Last night - while reviewing the service manual - I discovered the existence of the "timing slit disk"Over the years, overspray of ink had gotten all over mine. Several cleanings with q-tips, pads and windex fixed itDid a recalibration of line-feed (...