Konica 7145 Drum Installation Issues

[darry1322]

Hello, I am installing a new drum and blade for the 7145 and when I took the Charge Corona Assembly off a small 3/4 inch spring fell out from the front. It is not one of the two imbedded ones, and I cannot see where it could possibly go. The instructions do not mention it. When reassembling it does not appear to be needed, since the two imbedded springs seem to be providing enough pressure. But I am wondering if not installing will be a problem. Can any one direct me? Thanks.

Check out the parts manual for the drum unit and look at the cleaning rod assembly for the charge wire cleaner and you should see the spring you found.

[tech28]

Thats the spring that hold's tension on the corona block, goes in front of corona, the corona cleaner that you took off holds that in. I would post a picture from the service manual. but unfortunately, I cant do that, sorry.

[Synthohol]

here ya go, see if its on these pages.

[darry1322]

here ya go, see if its on these pages.

Interestingly, I don't see the spring I was referring to listed there. It should be there, but I don't see it.

[Synthohol]

a picture would be helpful.

[tech28]

It's not on the charge unit, it's part of the drum unit itself. When you put the corona back, toward the front of the corona where you slide the corona wire cleaner, its goes right between the corona and drum unit.

[patterson70]

Thank you tech28 and others. I am posting a pic - there is not a seat for the lone spring I assume - you just place it in that area between the drum and the corona fits against it when it is placed into the two spring loaded holes? Seems kind of an after-thought by the designer?

[patterson70]

Oops , here are the pics

[tech28]

Goes where the corona cleaner shaft is inserted, shaft hols spring in place, everything said and done, you dont need it, machine will work just fine, even without the corona cleaner, customers that use that wire cleaner create more problems, we just take em off and do a corona cleaning when servicing machines. Still have a bunch out, have tons of parts, boards, gears, everything needed for those machines. Oldy but a very good running copier/printer/scanner(only b/w) but just one good piece of machine. Have some with a million plus, and still purring.

[patterson70]

Ok, thank you again and for this additional clarification! And for the additional information about this machine, great to know! I am now more impressed than ever with it.