This old guy was going out the door for donation when it died for boot diagnostic fail. The 20 yo batteries inside the Dallas modules have died. It's an old friend so one repair attempt is granted.

Open her up and remove the board.

Old modules removed, board ready for replacements.

Unlikely they will ever need replacement again but the new modules on order will go into sockets.
https://www.mouser.com/datasheet/2/256/DS1230AB-DS1230Y-1513026.pdf

 

The new NVRAM modules are here.

Yes, they are in sockets.

First boot self-test. OMG! That's normal with good but invalid memory locations.

Boot self-test after a few cold boots, self cal and external amplitude calibration (remove jumper 156 on the board) at 0.2, 2.0 and 20.0 volts.

Sweet. Works but needs a full calibration.
http://w140.com/tekwiki/wiki/2432

 

Sad, the old guy became a FORD today. The 5A fuse is toast on power-up. It had a good long life doing what it was made for. You can't ask for more than that.

 

Took a look at the PS section. The magic is gone.



She had a good life. It's time to order a replacement.

 

What a shame!
I could use those knobs.

 

What a shame!
I could use those knobs.

After the first repair there was a do-not-resuscitate (DNR) order signed, but I had to look.

Knobs?
That can happen, PM me a post address.

 

That can happen, PM me a post address.

I was just joking, though I can use some Tek knobs. It would be cheaper for me to 3D-print the knobs I need.

 

I was just joking, though I can use some Tek knobs. It would be cheaper for me to 3D-print the knobs I need.

Sure but these are 'real' Tek plastic.

 

The "real thing" knobs make fetch a few or many bucks; post in the Tek groups and I'll bet many people will be happy to take the knobs.

 

The "real thing" knobs make fetch a few or many bucks; post in the Tek groups and I'll bet many people will be happy to take the knobs.

I just looked in the trash bin, they are gone already. The dumpster divers are quick.

 

I just looked in the trash bin, they are gone already. The dumpster divers are quick.

I think the dumpster divers know their most favourable territory.