I've order 6 ICs straight away. Hitachi HM6117LP-4 6117 2K x 8 CMOS Static RAM
These look to be direct replacements. Rick On Sun, Mar 15, 2020 at 12:00 PM <[email protected]> wrote: > Send volt-nuts mailing list submissions to > [email protected] > > To subscribe or unsubscribe via the World Wide Web, visit > http://lists.febo.com/mailman/listinfo/volt-nuts_lists.febo.com > or, via email, send a message with subject or body 'help' to > [email protected] > > You can reach the person managing the list at > [email protected] > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of volt-nuts digest..." > > > Today's Topics: > > 1. Solartron 7081 (Rick Bale) > 2. Re: Solartron 7081 (Bruce Griffiths) > 3. Re: Solartron 7081 (Shaun Merrigan) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Sat, 14 Mar 2020 18:05:38 -0400 > From: Rick Bale <[email protected]> > To: [email protected] > Subject: [volt-nuts] Solartron 7081 > Message-ID: <[email protected]> > Content-Type: text/plain; charset=utf-8 > > Hey all, this list has been too quiet. I just took delivery of a Solartron > 7081. It?s starts up with all leds on with no screen, then hangs there. > First inspection revealed that two memory chips were in backwards. But > correction didn?t fix anything. 5v rail is good on every IC on the upper > logic board. > > This one will be tough for me as it looks like I need to spend a lot of > time working through the logic. Not my strong skill. > > Rick > > > > ------------------------------ > > Message: 2 > Date: Sun, 15 Mar 2020 11:24:21 +1300 (NZDT) > From: Bruce Griffiths <[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=UTF-8 > > If plugging the memory chips in backwards means their power supply > connections were reversed, those memory chips are likely toast. > > Bruce > > On 15 March 2020 at 11:05 Rick Bale <[email protected]> wrote: > > > > > > Hey all, this list has been too quiet. I just took delivery of a > Solartron 7081. It?s starts up with all leds on with no screen, then hangs > there. First inspection revealed that two memory chips were in backwards. > But correction didn?t fix anything. 5v rail is good on every IC on the > upper logic board. > > > > This one will be tough for me as it looks like I need to spend a lot of > time working through the logic. Not my strong skill. > > > > Rick > > > > _______________________________________________ > > 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: 3 > Date: Sat, 14 Mar 2020 23:17:38 +0000 > From: Shaun Merrigan <[email protected]> > To: Discussion of precise voltage measurement > <[email protected]> > Subject: Re: [volt-nuts] Solartron 7081 > Message-ID: > < > mwhpr22mb01426f76421b8001e6791b0ada...@mwhpr22mb0142.namprd22.prod.outlook.com > > > > Content-Type: text/plain; charset="utf-8" > > Rick, > > ROM images for this meter are readily available on XDevs or in the > archives of the Solartron (group on groups.io), so you can easily burn > new ROMS as you need. > There are some excellent threads on the 7081 and 7071 on the eevblog forum > which are certainly worth reading. > > Shaun Merrigan > > -----Original Message----- > From: volt-nuts <[email protected]> On Behalf Of Rick Bale > Sent: Saturday, March 14, 2020 16:06 > To: [email protected] > Subject: [volt-nuts] Solartron 7081 > > Hey all, this list has been too quiet. I just took delivery of a Solartron > 7081. It?s starts up with all leds on with no screen, then hangs there. > First inspection revealed that two memory chips were in backwards. But > correction didn?t fix anything. 5v rail is good on every IC on the upper > logic board. > > This one will be tough for me as it looks like I need to spend a lot of > time working through the logic. Not my strong skill. > > Rick > > _______________________________________________ > 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 124, Issue 1 > ***************************************** > _______________________________________________ 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.
