This is actually three separate calls, but the same core problem. Image quality remains unaffected, just noise.
It didn't take me long to pin it down to the transfer belt drive. I removed the right hand cover to see the transfer belt unit vibrating. Some finger pressure on the transfer cleaning unit stops the gear noise. The first time I replaced the MP tray drive unit and the noise was gone.
The second time was a few weeks later. The bronze bushing at the drive corner was worn at the bore. A quick swap with the front bushing resolved it for a while.
The third time was several months later, immediately after the PM. It's not very complicated, just a drive gear sticking out of a drive pack driving the gear on the transfer belt unit. After close examination I found a worn area in the rear transfer rail where that bronze bushing rides, and keeps the spacing to the drive pack. As a temporary measure I added a few shims between the bushing and the shaft to re-orient the bushing further into the rail. It bought me 6 weeks of quiet.
Today I returned with the rear transfer rail and the little mylar for the sensor wiring. Have you ever changed one of these? What fun! I've been into the main drive several times. Beyond that, the fuser drive assy must come off, and the belt sensor assy loosened and shifted to the front. With the nearly new MP drive assy out I noticed the white plastic bushings were pretty badly ovalled out. Now they're bronze. We'll see how that lasts.
To my surprise it all worked when it booted up. After 5 1/2 hours I was amazed that everything got reconnected correctly. =^..^=
It didn't take me long to pin it down to the transfer belt drive. I removed the right hand cover to see the transfer belt unit vibrating. Some finger pressure on the transfer cleaning unit stops the gear noise. The first time I replaced the MP tray drive unit and the noise was gone.
The second time was a few weeks later. The bronze bushing at the drive corner was worn at the bore. A quick swap with the front bushing resolved it for a while.
The third time was several months later, immediately after the PM. It's not very complicated, just a drive gear sticking out of a drive pack driving the gear on the transfer belt unit. After close examination I found a worn area in the rear transfer rail where that bronze bushing rides, and keeps the spacing to the drive pack. As a temporary measure I added a few shims between the bushing and the shaft to re-orient the bushing further into the rail. It bought me 6 weeks of quiet.
Today I returned with the rear transfer rail and the little mylar for the sensor wiring. Have you ever changed one of these? What fun! I've been into the main drive several times. Beyond that, the fuser drive assy must come off, and the belt sensor assy loosened and shifted to the front. With the nearly new MP drive assy out I noticed the white plastic bushings were pretty badly ovalled out. Now they're bronze. We'll see how that lasts.
To my surprise it all worked when it booted up. After 5 1/2 hours I was amazed that everything got reconnected correctly. =^..^=