Its probably a little high because the I/O bus is unloaded.
I've seen some variation on this supply voltage on my machines, but
all of them work fine.
( I currently have 7 working 2113's, as well as a pair of 2116's, two
2115's, and a 2115 as well).
Let me know if you need a hand getting the machine to boot some
useful software. I can supply you with EPROM's (or EEPROM's)
with bootable software, and information on how to build a simple
paper tape reader emulator that reads them.
You can also boot your 2113 from a PC's serial port with the
right loader ROM and a BACI serial interface board on the HP.
----- Original Message -----
From: "Peter Brown" <peterbrown10(a)hotmail.com>
To: <cctalk(a)classiccmp.org>
Sent: Tuesday, November 16, 2004 9:46 PM
Subject: Re: HP 2113B service manual / schematics
Hi Bob and Jay,
Thanks for replying to my post. I now have a pile of schematics to try to
understand!
Bob: Thanks for the info on the -2 volt rail - I'm not going to be running
any 2116 hardware so I guess I should be OK.
I'm still intrigued as to why my rail should be out of spec (the service
manual is pretty precise about the rail limits). If any one has access to
the schematic for the standard power supply for the 2113B (i.e. without
the battery back up option) then I'd be very interested in getting hold of
a copy.
Cheers
Peter Brown