[time-nuts] 5372A A7 CPU board

[John Allen]

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 at 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 at 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 at 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 at 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 at 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 at 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