I have the CPU board 05372-6007 out of my 5372A this evening to replace the battery. While looking at it, I see jumpers for 64/256K and 512k/2M. I suspect the 64/256 is for the RAM as it is located next to the (non socketed) RAM. Does anyone have a schematic or listing of what all the jumpers are for? Thanks! Bob

Hi Bob - I have a OCR'd service manual with schematics. There is also one on the KO4BB site http://www.ko4bb.com/getsimple/index.php?id=manuals I can post mine if that one isn't sufficient. Regards, John K1AE, Bolton, MA -----Original Message----- From: time-nuts [mailto:time-nuts-bounces@febo.com] On Behalf Of Bob Bownes Sent: Monday, January 02, 2017 8:13 PM To: Discussion of precise time and frequency measurement Subject: [time-nuts] 5372A A7 CPU board I have the CPU board 05372-6007 out of my 5372A this evening to replace the battery. While looking at it, I see jumpers for 64/256K and 512k/2M. I suspect the 64/256 is for the RAM as it is located next to the (non socketed) RAM. Does anyone have a schematic or listing of what all the jumpers are for? Thanks! Bob _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

I took a lot ok through the service manual, but didn't see the A7 schematic. Is it someplace non obvious? Thanks! > On Jan 2, 2017, at 23:00, John Allen <john@pcsupportsolutions.com> wrote: > > Hi Bob - I have a OCR'd service manual with schematics. There is also one on the KO4BB site > http://www.ko4bb.com/getsimple/index.php?id=manuals > > I can post mine if that one isn't sufficient. > > Regards, John K1AE, Bolton, MA > > -----Original Message----- > From: time-nuts [mailto:time-nuts-bounces@febo.com] On Behalf Of Bob Bownes > Sent: Monday, January 02, 2017 8:13 PM > To: Discussion of precise time and frequency measurement > Subject: [time-nuts] 5372A A7 CPU board > > > I have the CPU board 05372-6007 out of my 5372A this evening to replace the battery. While looking at it, I see jumpers for 64/256K and 512k/2M. > > I suspect the 64/256 is for the RAM as it is located next to the (non socketed) RAM. > > Does anyone have a schematic or listing of what all the jumpers are for? > > Thanks! > Bob > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > > > --- > This email has been checked for viruses by Avast antivirus software. > https://www.avast.com/antivirus > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there.

It's not there on my copy either. A7 CPU is assembly level repair. All others are component level repair. Page 6-9 of the 05272-90016 service manual says: The A7 board has eight 1 Mbit RAM ICs having a total system memory of 256K long words, each 32-bits wide. And, The program is stored in 768 Kbytes of ROM (four 128 Kbyte EPROMs and four 64 Kbyte EPROMs). Regards, John -----Original Message----- From: time-nuts [mailto:time-nuts-bounces@febo.com] On Behalf Of Bob Bownes Sent: Tuesday, January 03, 2017 12:11 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] 5372A A7 CPU board I took a lot ok through the service manual, but didn't see the A7 schematic. Is it someplace non obvious? Thanks! > On Jan 2, 2017, at 23:00, John Allen <john@pcsupportsolutions.com> wrote: > > Hi Bob - I have a OCR'd service manual with schematics. There is also one on the KO4BB site > http://www.ko4bb.com/getsimple/index.php?id=manuals > > I can post mine if that one isn't sufficient. > > Regards, John K1AE, Bolton, MA > > -----Original Message----- > From: time-nuts [mailto:time-nuts-bounces@febo.com] On Behalf Of Bob Bownes > Sent: Monday, January 02, 2017 8:13 PM > To: Discussion of precise time and frequency measurement > Subject: [time-nuts] 5372A A7 CPU board > > > I have the CPU board 05372-6007 out of my 5372A this evening to replace the battery. While looking at it, I see jumpers for 64/256K and 512k/2M. > > I suspect the 64/256 is for the RAM as it is located next to the (non socketed) RAM. > > Does anyone have a schematic or listing of what all the jumpers are for? > > Thanks! > Bob > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > > > --- > This email has been checked for viruses by Avast antivirus software. > https://www.avast.com/antivirus > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus