Dedier, I will definitely check into that. What model did you buy?
Rick Rick Sent from iPhone. > On Apr 20, 2020, at 6:24 PM, Didier Juges <[email protected]> wrote: > > Rick, > > Maybe not the solution to your particular problem but for $5.00 (on > AliExpress) or $10 (on Amazon) you can get an amazingly useful 25 MHz, 8 > channel logic analyzer. > > You can use it with sigrok, free software that comes with a large number of > protocol decoders. > > I just got one and I have used it quite a bit in the last couple of months > to troubleshoot serial data issues with a UART and I2C issues that would > have been extremely hard or impossible with my digital storage oscilloscope. > > It's not a replacement for a scope but a very useful complement and far and > away the best $5 I have ever spent on anything. > > It may not be useful when troubleshooting buses wider than 8 bits or faster > than a few MHz but everyone should have one of those. > > For a few $ more, they do have faster, 16 bit models. > > Didier KO4BB > > > >> On Mon, Apr 20, 2020, 1:33 PM Rick Bale <[email protected]> wrote: >> >> I's been a while since I last posted on my 7081. I needed to wait to >> receive new earthy CPU and DMA chips. They are cheap and easy to swap. So >> far, with Joe's help, I've replaced the earthy side PROMS. Also new is all >> the RAM, DMA and microprocessor. I also went back and rechecked all the >> power rails. I found a little extra noise on the +5v & +40v power rails. >> I corrected this by replacing C56, C57, C58 filter caps. They all measured >> about 50% or less of their original uF. The 12v filter C59 was okay. >> >> I have the same symptom of all LED stuck on and nothing on the screen. I >> feel like I need to check the data during boot up. Probably means decoding >> the logic. Maybe it's hung on a reset since all the LEDs are on. It would >> seem reasonable that they would all come on during boot up or on a reset. >> The problem is I don't have a logic analyzer or probe but mainly don't >> really know where to start in the circuit. >> >> Does anyone have any suggestions on where to start. Do you think I should >> move the conversation to the Solartron Group? >> >> Thanks, Rick >> >> >> >>> ---------------------------------------------------------------------- >>> >>> Message: 1 >>> Date: Wed, 8 Apr 2020 13:23:17 -0400 >>> From: Rick Bale <[email protected]> >>> To: [email protected] >>> Subject: Re: [volt-nuts] Solartron 7081 >>> Message-ID: >>> < >>> cad2mu-meqokcshn2ljj4ako1whteuyk2mdjurg51pyhmsgn...@mail.gmail.com> >>> Content-Type: text/plain; charset="UTF-8" >>> >>> Thank you David that is good information. This is good news is I have >> the >>> correct PROMs. My board is the 70810504X with 2564 PROMs. Joe has >>> programmed up a new set of PROM's plus I have the old ones. >>> >>> I'll reassemble the unit after doing an alcohol scrub down on all the >>> boards because there evidence of water damage on the top cover's shield. >>> It's turned the shield green and has a mildew smell. Joe saw some >> corrosion >>> on the old PROMs too. In the long run I'll need to replace the cover's >>> inside shield. I should be able order a custom one from a PCB shop as >> it's >>> just a large un-etched tin coated PCB board. >>> >>> If the cleaning doesn't work then it seems like I need to find a test >> point >>> to monitor the boot up data stream. Does that seem like a good place >>> to start since power rails are good? Is it best to watch it from the GPIB >>> connection? >>> >>> Rick >>> >>> >>> >>>> Message: 2 >>>> Date: Wed, 8 Apr 2020 14:17:52 +0100 >>>> From: "David C. Partridge" <[email protected]> >>>> To: "'Discussion of precise voltage measurement'" >>>> <[email protected]> >>>> Subject: Re: [volt-nuts] Solartron 7081 >>>> Message-ID: <[email protected]> >>>> Content-Type: text/plain; charset="us-ascii" >>>> >>>> There is a downloadable high quality scan of the Service Manual which I >>>> produced a while ago, that you can download from here: >>>> >>>> < >>>> >>> >> https://groups.io/g/Solartron_Schlumberger_Equipment/files/Solartron%207071 >>>> %20and%207081 >>>> < >>> >> https://groups.io/g/Solartron_Schlumberger_Equipment/files/Solartron%207071%20and%207081 >>>> >>>>> >>>> >>>> It has the schematics for both the early (7504) and late (7514) earthy >>>> processor boards, and contains numerous corrections to the text and >> parts >>>> lists. The schematics have been cleaned up and corrected where >>> necessary. >>>> >>>> You can tell which ROMS the earthy processor uses based on the board >>>> number: >>>> Board 70817504 uses 2564s while 70817514 uses 2764s. >>>> >>>> If you use the wrong ROMs - it won't work! >>>> >>>> The Test Spec document is also of interest. >>>> >>>> Keep well >>>> D >>>> >>>> -----Original Message----- >>>> From: volt-nuts [mailto:[email protected]] On Behalf Of >>>> Rick >>>> Bale >>>> Sent: 08 April 2020 13:45 >>>> To: [email protected] >>>> Subject: [volt-nuts] Solartron 7081 >>>> >>>> All, >>>> >>>> Here's an update on my 7081 that hangs during boot up >>>> >>>> >>>> >>>> >>>> ------------------------------ >>>> >>>> Message: 3 >>>> Date: Wed, 8 Apr 2020 14:29:09 +0100 >>>> From: "David C. Partridge" <[email protected]> >>>> To: "'Discussion of precise voltage measurement'" >>>> <[email protected]> >>>> Subject: Re: [volt-nuts] Solartron 7081 >>>> Message-ID: <[email protected]> >>>> Content-Type: text/plain; charset="us-ascii" >>>> >>>> Grrr why was my link split across two lines - it was sent as one line >> ... >>>> >>>> Be warned you'll need to re-constitute the link ... >>>> >>>> David >>>> >>>> -----Original Message----- >>>> From: volt-nuts [mailto:[email protected]] On Behalf Of >>>> David >>>> C. Partridge >>>> Sent: 08 April 2020 14:18 >>>> To: 'Discussion of precise voltage measurement' >>>> Subject: Re: [volt-nuts] Solartron 7081 >>>> >>>> There is a downloadable high quality scan of the Service Manual which I >>>> produced a while ago, that you can download from here: >>>> >>>> < >>>> >>> >> https://groups.io/g/Solartron_Schlumberger_Equipment/files/Solartron%207071 >>>> %20and%207081 >>>> < >>> >> https://groups.io/g/Solartron_Schlumberger_Equipment/files/Solartron%207071%20and%207081 >>>> >>>>> >>>> >>>> It has the schematics for both the early (7504) and late (7514) earthy >>>> processor boards, and contains numerous corrections to the text and >> parts >>>> lists. The schematics have been cleaned up and corrected where >>> necessary. >>>> >>>> You can tell which ROMS the earthy processor uses based on the board >>>> number: >>>> Board 70817504 uses 2564s while 70817514 uses 2764s. >>>> >>>> If you use the wrong ROMs - it won't work! >>>> >>>> The Test Spec document is also of interest. >>>> >>>> Keep well >>>> D >>>> >>>> -----Original Message----- >>>> From: volt-nuts [mailto:[email protected]] On Behalf Of >>>> Rick >>>> Bale >>>> Sent: 08 April 2020 13:45 >>>> To: [email protected] >>>> Subject: [volt-nuts] Solartron 7081 >>>> >>>> All, >>>> >>>> Here's an update on my 7081 that hangs during boot up >>>> >>>> >>>> _______________________________________________ >>>> volt-nuts mailing list -- [email protected] >>>> To unsubscribe, go to >>>> http://lists.febo.com/mailman/listinfo/volt-nuts_lists.febo.com >>>> and follow the instructions there. >>>> >>>> >>>> >>>> >>>> ------------------------------ >>>> >>>> Message: 4 >>>> Date: Wed, 8 Apr 2020 13:33:48 +0000 >>>> From: Shaun Merrigan <[email protected]> >>>> To: Discussion of precise voltage measurement >>>> <[email protected]> >>>> Subject: Re: [volt-nuts] Solartron 7081 >>>> Message-ID: >>>> < >>>> >>> >> mwhpr22mb0142778e26799873fc21114bda...@mwhpr22mb0142.namprd22.prod.outlook.com >>>>> >>>> >>>> Content-Type: text/plain; charset="Windows-1252" >>>> >>>> Rick, >>>> >>>> I have two 7081?s with the relevant configuration as follows: >>>> >>>> S\N 1395 with board 70817514 and 2764 ROMS >>>> S\N 415 with board 70817504 and 2564 ROMS >>>> >>>> I can also confirm that swapping ROMS between the board revisions does >>> not >>>> work. >>>> >>>> Hope this helps. >>>> >>>> Shaun Merrigan >>>> https://www.shaunmerrigan.info >>>> >>>> ________________________________ >>>> From: volt-nuts <[email protected]> on behalf of David >> C. >>>> Partridge <[email protected]> >>>> Sent: Wednesday, April 8, 2020 7:17:52 AM >>>> To: 'Discussion of precise voltage measurement' < >>> [email protected]> >>>> Subject: Re: [volt-nuts] Solartron 7081 >>>> >>>> There is a downloadable high quality scan of the Service Manual which I >>>> produced a while ago, that you can download from here: >>>> >>>> < >>>> >>> >> https://groups.io/g/Solartron_Schlumberger_Equipment/files/Solartron%207071 >>>> %20and%207081 >>>> < >>> >> https://groups.io/g/Solartron_Schlumberger_Equipment/files/Solartron%207071%20and%207081 >>>> >>>>> >>>> >>>> It has the schematics for both the early (7504) and late (7514) earthy >>>> processor boards, and contains numerous corrections to the text and >> parts >>>> lists. The schematics have been cleaned up and corrected where >>> necessary. >>>> >>>> You can tell which ROMS the earthy processor uses based on the board >>>> number: >>>> Board 70817504 uses 2564s while 70817514 uses 2764s. >>>> >>>> If you use the wrong ROMs - it won't work! >>>> >>>> The Test Spec document is also of interest. >>>> >>>> Keep well >>>> D >>>> >>>> -----Original Message----- >>>> From: volt-nuts [mailto:[email protected]] On Behalf Of >>>> Rick >>>> Bale >>>> Sent: 08 April 2020 13:45 >>>> To: [email protected] >>>> Subject: [volt-nuts] Solartron 7081 >>>> >>>> All, >>>> >>>> Here's an update on my 7081 that hangs during boot up >>>> >>>> >>>> _______________________________________________ >>>> volt-nuts mailing list -- [email protected] >>>> To unsubscribe, go to >>>> http://lists.febo.com/mailman/listinfo/volt-nuts_lists.febo.com >>>> and follow the instructions there. >>>> >>>> >>>> ------------------------------ >>>> >>>> Subject: Digest Footer >>>> >>>> _______________________________________________ >>>> volt-nuts mailing list >>>> [email protected] >>>> http://lists.febo.com/mailman/listinfo/volt-nuts_lists.febo.com >>>> >>>> >>>> ------------------------------ >>>> >>>> End of volt-nuts Digest, Vol 125, Issue 1 >>>> ***************************************** >>>> >>> >>> >>> ------------------------------ >>> >>> Subject: Digest Footer >>> >>> _______________________________________________ >>> volt-nuts mailing list >>> [email protected] >>> http://lists.febo.com/mailman/listinfo/volt-nuts_lists.febo.com >>> >>> >>> ------------------------------ >>> >>> End of volt-nuts Digest, Vol 125, Issue 2 >>> ***************************************** >>> >> _______________________________________________ >> volt-nuts mailing list -- [email protected] >> To unsubscribe, go to >> http://lists.febo.com/mailman/listinfo/volt-nuts_lists.febo.com >> and follow the instructions there. >> > _______________________________________________ > volt-nuts mailing list -- [email protected] > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/volt-nuts_lists.febo.com > and follow the instructions there. _______________________________________________ volt-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/volt-nuts_lists.febo.com and follow the instructions there.
