C224 blank pages

[copyman]

If the developer wasn't turning would machine still give a good level history reading? The OP said level was good at 6%. This is why I ruled out dev unit not turning.

[mrfuser]

It was indeed sd4 solenoid. First one I have seen die

[copyman]

Thanks for update. Good to know. Looks like it was a common problem and surprised I never saw it. I was servicing quite a few of the 4 & 4e series a few years back and never had that sol go bad.

Does this only happen to higher volume machines? Does it happen with the 8 series or Kon Min fix it?

Was there a bulletin on this? I've scanned the TSB's hundreds of times and don't recall seeing that.

[mrfuser]

First I’ve ever ran into this also in my 35 years. Annoying little repair

[copyman]

First I’ve ever ran into this also in my 35 years. Annoying little repair

May I ask what was meter on this machine?

[kingarthur]

If the developer wasn't turning would machine still give a good level history reading? The OP said level was good at 6%. This is why I ruled out dev unit not turning.

Yes, which is the annoying thing, no errors are usually displayed.

[KMFLT3CH]

Does this only happen to higher volume machines? Does it happen with the 8 series or Kon Min fix it?

Was there a bulletin on this? I've scanned the TSB's hundreds of times and don't recall seeing that.

Yes, I've replaced SD4 on a few 8 series, both low and high meter. It seems more common on the 4 series but we only have a few of these in the field now.
No bulletin exists on this that I know of.

[mrfuser]

Meyer was about 150,000 total

[adfgdf]

Unfortunately, in all KM copiers and printers (and not only those) the solenoids might cause problems.
Usually, the (black) insulating material used to prevent noise - melts, causing the metal arm to stick and not return properly as the electro-magnet is not strong enough.
Sometimes you can fix that with a patent, by lowering the distance between the metal arm and the electro-magnet.