HP262x keyboard voltage

[Rik Bos]

Does a HP125 do the trick ?
If so I'll make a measurement for you.

-Rik 

> -----Oorspronkelijk bericht-----
> Van: cctalk-bounces at classiccmp.org 
> [mailto:cctalk-bounces at classiccmp.org] Namens Tony Duell
> Verzonden: donderdag 2 april 2009 21:56
> Aan: cctalk at classiccmp.org
> Onderwerp: HP262x keyboard voltage
> 
> Does anyone have an HP262x (2621, 2623, etc) terminal (with a 
> DA15 keyboard connector) and a voltmeter to hand? 
> 
> If so, could you please open up the keyboard (4 screws on the 
> bottom), plug the keyboard into the terminal, power up, and 
> measure the voltage either between ; 
> 
> Pin 16 (+ve) and pin 8 (-ve) of any of the 3 chips in the keyboard
> 
> Or 
> 
> Across the electrolytic capacitor on the keyboard PCB to the 
> left of the 'Tab' key'
> 
> Alternatively, measure the voltage between pins 12 (+ve) and 
> 10 (-ve) of the DA15 socket on the terminal (temrinal powered 
> up, it doesn't matter whether the keyboard is plugged in or not)
> 
> All 3 should be the same voltage. I am guessing it's 12V, but 
> it might be 5V.
> 
> Tnakis in advance for any help.
> 
> -tony
> 
>