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I didn't catch that. it is indeed a lowercase "b" and not a 6. so, what is a b-31-916?

have a Riso RZ 390. error code 6-31-916 pops up immediately after a print run or if the machine sits idle. can only get rid of it by turning the machine off. don't know if it's related, but the lower...

What's the best course of action if the RF fails? I've got a 3/4-full cartridge that won't work in either machines.

Just got 2 RZ 390s. Just found out the ink cartridges have RF tags.

What info do these communicate? I'm guessing to let the drum know it's in position yes/no.

Anything else?

Success! It took a while to figure out how to get a grip on that gear behind the P disk to turn it, and getting the P disk oriented without also moving the pressure disk was tricky until I jammed a...

Thanks, RRodgers and joelsa12. Joel, I assume you're pulling for Butler in the big game tonight.

RR, about those alignment holes in the P disc: there are two of them, and which one you choose...

Thanks for responding, joelsa12.

The pressure solenoid tests good. No wire fatigue evident.

Paper sensor likewise tests properly.

The two disks are where it gets interesting. As I said,...

Thanks for responding.

Sorry, but I don't know how to check the timing (wish I did). I'm not a tech, just a guy with a screwdriver and a flashlight. And a junked GR machine. And a set of Riso...

Riso FR2950. Had been making good prints. Stopped three sheets into last press run and is still down.

Found that the hook lever has proper up-down action but will not move forward to catch the...

Have a Riso FR 2950ui. Good machine, excellent prints. Master count: 8,220. Prints: 1.7 million.

Problem: leading edge of master sheet won't advance because the loading motor won't activate as...