[HECnet] Re: [DECtec] VCB02 issues

[Cory Smelosky]

Sent from mobile device that advertises itself for no good reason

On 12 May 2014, at 23:03, Gregg Levine <gregg.drwho8 at gmail.com> wrote:

Hello!
Dave what are these grouchy examples of technology that followed Cory home?
The other two are obvious.

But the PDP-11/23 Plus seems to be an interesting critter. What's wrong
with it Cory?

Looks like the main crystal got knocked about and crushed. Haven't tested with a scope yet though

-----
Gregg C Levine gregg.drwho8 at gmail.com
"This signature fought the Time Wars, time and again."


On Mon, May 12, 2014 at 10:59 PM, Dave McGuire <mcguire at neurotica.com>wrote:

On 05/12/2014 10:01 PM, Cory Smelosky wrote:
Trying to test the est of the haul.   That means the VCB02 and VR290 at
present. ;)

Testing it ina   MicroVAX II...I'm not even to the point of VMS!   I've
read it can be used as the console...but not in my case!   The diagnostic
LEDs on the VCB02 board never change at all.   They all come on during
power-on and never go off.   The same behaviour was exhibited by ny dead
11/23+ board.

Any ideas of what I can check? It's got to be some really obvious error.
It can't be plain dead!

Don't sweat it too much.   I have lots of VCB02 board sets and can send
you whatever you end up needing.   Bear in mind that, on a KA630, it can
take quite awhile for anything to come up on the display.

Here's the LED definitions for the VCB02:

During test:
111         state on power-up
001         power-up test in progress

After test:
000         no faults detected
001         VCB02 base module fault
010         first VCB02 4-plane module fault
011         second VCB02 4-plane module fault
100         not used
101         keyboard fault
110         mouse or tablet fault
111         catastrophic fault

                            -Dave

--
Dave McGuire, AK4HZ
New Kensington, PA

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