Strange problem on MPC3000 w/ SR 790 when power up from display panel stapler cycles

[delosangeles]

Hello everyone.

A clients MPC3000 connected with a SR 790 on power up from the display power botton starts the stapler unit to cycle to the home position sensor and to the front door then back and forth. On the bottom left of the touch panel the add staples flashes for maybe a quarter of a second and the beeper sounds of so I turned it off. If the client copies or sends a job with stapling envolved the machine performs the job with no problem and no longer cycles the stapler unit.

I have swaped the finisher with a know working one and new staple cartridge but the problem is not corrected. I'm thinking it's the I/O board or the BICU board, was wondering if anyone has seen this issue or have any input.

Thanks to everyone

[Jomama46]

Something shorted in the conpane?

[totoro]

Have you tried re-flashing/updating the firmware? I have had a lot of strange problems on all models that were fixed by re-flashing/updating firmware. One of them involved getting special firmware from Ricoh for the configuration of machine and finisher. It can't hurt and it's free.

[miro]

I have a few SR 790 with same problem,.... hard work, but always was problem with broken wire

[delosangeles]

?

Something shorted in the conpane?

Not sure what you mean by Conpane.

[delosangeles]

Yep

Have you tried re-flashing/updating the firmware? I have had a lot of strange problems on all models that were fixed by re-flashing/updating firmware. One of them involved getting special firmware from Ricoh for the configuration of machine and finisher. It can't hurt and it's free.

Yep I did the engine and system firmware. Just not sure where to go from there.

[delosangeles]

Harness?

I have a few SR 790 with same problem,.... hard work, but always was problem with broken wire

Really, which harness, on the main frame or one in the finnisher? I did swap the SR790 with one that works fine when connected to other machines so I'm guessing the problem lies in the MPC3000.

Thanks to all

[totoro]

This may be a shot in the dark, but what about the bridge unit? The bridge unit is the connection between the mainframe and the finisher. If not that then I would probably start with the boards you mentioned. Also, is the finisher firmware stored to the mainframe or to the finisher? I don't know if i ever thought of that before.

[Jomama46]

Hot sure what you mean by Conpane.

Sorry, Conpane = Control Panel

[delosangeles]

Really

Sorry, Conpane = Control Panel

Really something shorted on the control panel, please elaborate. Thanks.

[Jomama46]

Really something shorted on the control panel, please elaborate. Thanks.

You said that the problem starts when you turn the machine on from the control panel (display) but not from a workstation. i.e. if the power switch is shorting when pressed it may be bringing a certain voltage level down that is also being fed to the SR.

[delosangeles]

Yes

You said that the problem starts when you turn the machine on from the control panel (display) but not from a workstation. i.e. if the power switch is shorting when pressed it may be bringing a certain voltage level down that is also being fed to the SR.

From both turning on at the machine or if a print job is sent from a workstation. When the copier auto turns off (it has the fax option so no one ever really turns it off completely) and a user goes up to it and presses the "On" botton it lights up and the SR790 begins to do all it's Home Position Checks the Stapler Unit however does not stop for at least 10 to 15 times back and forth.

However if a job with stapling is sent from someones computer or right at the machine and a copy job with stapling is started the machine will perform the jobs with no jams or problem in fact once the job is complete the stapler will no longer cycle back and forth Until it Auto Shuts Off and someone turns it back On. Strange huh, what do you think?

Thanks for your help

[Jomama46]

How about if you turn the machine on at the main switch on the side of the copier, does it still go crazy then?. If so , then I would suspect the BICU (start-up sequence). If not then the trail leads back to the conpane power switch, which may, it self be shorting or the wiring from the switch or the connector at the conpane, but something to do with that switch circuitry. Good luck

[E Winter]

Since this is not a major issue I'd be interested if this symptone has been ocured since the initial installation. The SR790 exists since a while and I know that the first reveisions with an older firmware may work buggy with newer machines. I also don't know how old the other finisher is you've used for testing. You can't update the finisher over the machine via SD-Card - it has an good old Eprom on it's circuit.

Maybe you have a chance to borrow an eprom of a "new" SR790 for testing. Otherwise I could provide the SR790 firmware file but you'll need to have access to an eprom writer.

If this is definetly a new issue you can forget the finisher firmware of course.

I hope you didn't test the other finisher with the same stapler cartridge?

[delosangeles]

Yes

How about if you turn the machine on at the main switch on the side of the copier, does it still go crazy then?. If so , then I would suspect the BICU (start-up sequence). If not then the trail leads back to the conpane power switch, which may, it self be shorting or the wiring from the switch or the connector at the conpane, but something to do with that switch circuitry. Good luck

With the main swith it goes crazy less frequent most start-up sequence finish with no problem. I will recheck the machine taking in account your input. Thanks