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Re: [volt-nuts] Solartron 7071 beeping about twice a second

Bill Ezell

Wed, Jan 30, 2013 10:58 PM

Joe, Looks like you win the prize for remote diagnosis! Disconnecting

PL2 which goes to the keyboard, and it all comes up nicely. What I can
do about that though I am not at all sure ...

That is a remarkable catch.

You can disassemble the front panel quite easily. It could be as simple
as a bad bypass cap, an intermittent short, or, yes, a sticky switch. If
the last, you do have a bit of problem. It might be possible to just
work it a bit and get it to unstick. I don't remember the construction
of the switches, but I have a vague recollection that the flexible
silk-screen button is separate from the actual switch. If so, you can
probably find something that will work. Note also that there are a
number of ICs on the front panel PCB. You could have a bad IC. If, for
example, interrupt is being continually asserted, that could certainly
keep the self-test from completing. (happened to me on a 7061)

--
Bill Ezell

They said 'Windows or better'
so I used Linux.

> Joe, Looks like you win the prize for remote diagnosis! Disconnecting PL2 which goes to the keyboard, and it all comes up nicely. What I can do about that though I am not at all sure ... That is a remarkable catch. You can disassemble the front panel quite easily. It could be as simple as a bad bypass cap, an intermittent short, or, yes, a sticky switch. If the last, you do have a bit of problem. It might be possible to just work it a bit and get it to unstick. I don't remember the construction of the switches, but I have a vague recollection that the flexible silk-screen button is separate from the actual switch. If so, you can probably find something that will work. Note also that there are a number of ICs on the front panel PCB. You could have a bad IC. If, for example, interrupt is being continually asserted, that could certainly keep the self-test from completing. (happened to me on a 7061) -- Bill Ezell ---- They said 'Windows or better' so I used Linux.

David C. Partridge

Thu, Jan 31, 2013 1:10 AM

Regards,
David Partridge
-----Original Message-----
From: volt-nuts-bounces@febo.com [mailto:volt-nuts-bounces@febo.com] On Behalf Of Bill Ezell
Sent: 30 January 2013 22:59
To: volt-nuts@febo.com
Subject: Re: [volt-nuts] Solartron 7071 beeping about twice a second

Joe, Looks like you win the prize for remote diagnosis! Disconnecting

PL2 which goes to the keyboard, and it all comes up nicely. What I can do about that though I am not at all sure ...

That is a remarkable catch.

You can disassemble the front panel quite easily. It could be as simple as a bad bypass cap, an intermittent short, or, yes, a sticky switch. If the last, you do have a bit of problem. It might be possible to just work it a bit and get it to unstick. I don't remember the construction of the switches, but I have a vague recollection that the flexible silk-screen button is separate from the actual switch. If so, you can probably find something that will work. Note also that there are a number of ICs on the front panel PCB. You could have a bad IC. If, for example, interrupt is being continually asserted, that could certainly keep the self-test from completing. (happened to me on a 7061)

--
Bill Ezell

They said 'Windows or better'
so I used Linux.

volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
and follow the instructions there.

All the "stuff" on the PCB and the PCB itself are only used for the display. The keyboard is completely independent and is completely stupid (just a row/column arrangement of switches inside the front panel which are connected to PL2). The front panel and keys are AFAIK a sealed unit with no possibility for repair. Regards, David Partridge -----Original Message----- From: volt-nuts-bounces@febo.com [mailto:volt-nuts-bounces@febo.com] On Behalf Of Bill Ezell Sent: 30 January 2013 22:59 To: volt-nuts@febo.com Subject: Re: [volt-nuts] Solartron 7071 beeping about twice a second > Joe, Looks like you win the prize for remote diagnosis! Disconnecting PL2 which goes to the keyboard, and it all comes up nicely. What I can do about that though I am not at all sure ... That is a remarkable catch. You can disassemble the front panel quite easily. It could be as simple as a bad bypass cap, an intermittent short, or, yes, a sticky switch. If the last, you do have a bit of problem. It might be possible to just work it a bit and get it to unstick. I don't remember the construction of the switches, but I have a vague recollection that the flexible silk-screen button is separate from the actual switch. If so, you can probably find something that will work. Note also that there are a number of ICs on the front panel PCB. You could have a bad IC. If, for example, interrupt is being continually asserted, that could certainly keep the self-test from completing. (happened to me on a 7061) -- Bill Ezell ---- They said 'Windows or better' so I used Linux. _______________________________________________ volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.