[Error Code] Error T17-020 on a risograph RN2150

[Risolina]

Hello RISO users!
We just finished printing a huge job on our Risograph RN2150, many colors, many pages.
After we finished, the black drum was inserted for another print, when all of a sudden the display went dark and only the little green light of the start button remained on. Restarting didn't seem to work, so I decided to let it sit a while. After 15 min I tied again and it turned on! BUT with an error code T17-020... After some research I discovered this refers to the solenoid counters (masters or prints). To check these I must remove the drum and see if there is anything obstructing the counter, BUT the drum is locked and will not release!

So my question is twofold: How can I release the drum? (I have tried in testing mode to run the release action to no avail)
and What must I check to determine the extent of the T17-020 problem? (I've understood that I may need to replace it or just check that it is correctly connected, is that right?)

Any and all suggestions are greatly appreciated!!
Thanks in advance!
J.

[Iowatech]

Re: Error T17-020 on a risograph RN2150

For what it is worth, you might try holding down the "Reset" key while turning the machine on. And holding the key down for a few moments longer. That might help if there has been a recent disruption in your local utility's supply of power (maybe there was an energetic storm or some construction nearby).

[Risolina]

Re: Error T17-020 on a risograph RN2150

...try holding down the "Reset" key while turning the machine on...

Hi Iowatech, thanks for the suggestion, alas it did not make the error go away!

Update on the situation: I have managed to manually release the drum lock so I removed the drum. Now I just need to figure out where to look!

J.

[Risolina]

Re: Error T17-020 on a risograph RN2150

UPDATE #2
I have managed to open the front panel cover and access the two solenoid counters, nothing apparent is wrong with them.
I have also tried running 095 in Test Mode (Solenoid counter enable/disable setting) setting it to 0 (off) and then switching into normal mode (without an on/off). Nothing.

Any help diagnosing the problem is much appreciated!!!!

[jermyth]

Re: Error T17-020 on a risograph RN2150

I've had this happen on a RP, it was actually the drum connector on the drum was worn out not making good contact. Check you black drum and try swapping in a color. And restart the machine with the reset power up that Iowatech stated.
Good luck.

[Iowatech]

Re: Error T17-020 on a risograph RN2150

I'm guessing that when you removed the drum it was locked into place like when you normally remove the drum. On the other hand, if it wasn't locked you might want to check the drum drive coupling in the machine to make sure it is positioned correctly.

[Risolina]

Re: Error T17-020 on a risograph RN2150

...it was actually the drum connector on the drum was worn out not making good contact. Check you black drum and try swapping in a color...

I've tried swapping out drums, but, if my reasoning is correct, the problem must be on the machine-side (not the drum itself) since I get the error even with no drum mounted.

Iowatech, thanks for the advice. In the end I figured out how to manually disengage the drum lock so I can freely change drums even with the power off.

At this point I'm thinking the most likely culprit is the machine-side drum-connector so I'm tempted to assume replacing it would help. BUT: from what I can see it has many wires coming from it directly (see image attached) making it impossible to disconnect it and thus replace it.

drum connector.jpg

I have also cleaned the inside of the connector with alcohol but still no results.

I'm hoping a solution is out there!!!

[Iowatech]

Re: Error T17-020 on a risograph RN2150

I've tried swapping out drums, but, if my reasoning is correct, the problem must be on the machine-side (not the drum itself) since I get the error even with no drum mounted.

Iowatech, thanks for the advice. In the end I figured out how to manually disengage the drum lock so I can freely change drums even with the power off.

At this point I'm thinking the most likely culprit is the machine-side drum-connector so I'm tempted to assume replacing it would help. BUT: from what I can see it has many wires coming from it directly (see image attached) making it impossible to disconnect it and thus replace it.

[ATTACH=CONFIG]25547[/ATTACH]

I have also cleaned the inside of the connector with alcohol but still no results.

I'm hoping a solution is out there!!!

Just be careful when you manually release the drum. If the drum is not locked in the home position when you do that, it will only come out of the machine a little bit, and then you will have to rotate the drum by hand until it locks into place, which can be messy and time consuming. Also, the drum drive coupling will not be in the default position, and you will have to rotate that by hand as well.
Still, have you checked the connections for the solenoid counters? Sounds like that would be somewhat easier than replacing the machine side drum connector.
Besides, that is one of the cleanest machine side drum connectors I've seen on an RN series machine lately, and the plate the connector is mounted on has no obvious signs of damage.
By the way, thanks for the pictures, that actually helps a lot.

[Risolina]

Re: Error T17-020 on a risograph RN2150

Just be careful when you manually release the drum. If the drum is not locked in the home position when you do that, it will only come out of the machine a little bit, and then you will have to rotate the drum by hand until it locks into place, which can be messy and time consuming. Also, the drum drive coupling will not be in the default position, and you will have to rotate that by hand as well.
Still, have you checked the connections for the solenoid counters? Sounds like that would be somewhat easier than replacing the machine side drum connector.
Besides, that is one of the cleanest machine side drum connectors I've seen on an RN series machine lately, and the plate the connector is mounted on has no obvious signs of damage.
By the way, thanks for the pictures, that actually helps a lot.

Thanks for the pointers Iowatech, although the drum lock is the least of my problems! Luckily the machine gave the error when the drum was already in the home position so removing it was not at all difficult.

As of this moring, the T17-020 error persists...

I'm attaching another image of the Solenoid Counters in the hopes that it may inspire some ideas!

solenoid counters.jpg

I'm going to try to switch the counters out with those from another machine just to diagnose the problem more specifically. Wish me luck...

Staying hopeful...

[Iowatech]

Re: Error T17-020 on a risograph RN2150

Good luck!
An off the wall suggestion, as long as you have the front cover off, I think you will find a circuit board on the right hand side of the drum cavity. If so, you might try reseating the connectors there if time permits. I'm pretty sure that's where the other end of the solenoid counter's wiring harness is.
(Sorry, it's been a while since I've had the front cover off of a machine of the RN line, and not many service calls required that back in the day.)

[Risolina]

Re: Error T17-020 on a risograph RN2150

...a circuit board on the right hand side of the drum cavity. If so, you might try reseating the connectors there...

Hi Iowatech,
thanks again for the diagnostic advice! Still nothing though...
I'm attaching another image for clarity, in it you can see some highlighted connectors.

front panel 2.jpg

the connectors circled in white are ones I have disconnected and re-connected.
The one in red I did not touch as it has some kind of lock I didn't want to force.
The area highlighted in yellow is the solenoid counter's houseing which can be removed, this is what I'm hoping to replace with one from another machine in order to diagnose the problem.
The counters' wires go up the right side of the board and seem to connect at the top-most purple wired connector.

I'm still hoping that swapping out the counters will help!

[20gaugeO/U]

Re: Error T17-020 on a risograph RN2150

If you have ever had an inking hose break on any of the drums the ink likes to leak onto that black connector. Have you also cleaned the male connector on the drums and checked them for any problems (ink or a tiny piece of paper wedged in there)?
Don't be to gentle while putting the drum in. It can take a good slam. Also with the front cover off you have to trigger the door being shut before hitting reset.
You may want to take the back cover off also and start reseating connectors on the main boards back there.

Sounds like a fun problem. Good Luck

[Risolina]

Re: Error T17-020 on a risograph RN2150

BIG NEWS: SOLUTION FOUND!

much stupider than I thought. I'm more familiar with mechanical problems as opposed to electrical ones so I had completely overlooked a BURNT FUSE in the right-side circuit board.

I replaced it, and immediately found that inserting the black drum caused a short circuit again. SO, I decided to replace only the drum-side connector on the black drum and while taking it apart I noticed a wire that had somehow got a 'bite' in it. This was most likely the cause of the short circuit.

Now I have replaced the entire wiring for the black drum, and VOILA! our beast has risen from the flames (sorry but I'm excited).

Be aware of those clipped wires and burnt fuses! Much easier to deal with than the solenoid counters. I only wish the error code hadn't sent me on this goose-chase in the first place.

RISO ON.

[Iowatech]

Re: Error T17-020 on a risograph RN2150

Glad you got the machine fixed!
And thanks for sharing the solution.