10 Aug
2020
10 Aug
'20
10:53 a.m.
That's a very interesting comment, got me to thinking.? The VR150 was
connected to a working Vax Station 3100 with the proper DEC cable and I
observed the non-working behavior.? However, the color RGB output from
the VS3100 works just fine, I boot the machine into VMS and runs just OK
(but using a different monitor and video cable).
In the VS3100, at least the one I have M78, I think the monochrome video
output is separate from the RGB outputs.? I wonder if that part of the
video circuit is not working correctly?
I understand your comment about the rate, the VR150 is a non-standard
video refresh rate.? I think it is hard wired just for the DEC video output.
Doug
On 8/10/2020 1:37 PM, Bill Degnan via cctalk wrote:
One comment...if you don't have the correct cable
and a system that is set
for the correct refresh rate, it may appear that the monitor does not
work. Be sure you have compatible equipment. This was a specialized
display.
Bill
On Mon, Aug 10, 2020 at 1:19 PM Douglas Taylor via cctalk <
cctalk at classiccmp.org> wrote:
> Josh;
>
> I have a DEC VR150 that is nearly functional; shows full screen but the
> H/V are not in any sync at all. Would love to use it with a VaxStation
> 3100.
>
> Opened it up and found it quite a complicated monitor, not like a simple
> PC monochrome monitor.
>
> Purchased a microfiche manual off ebay, but haven't been able to view it
> yet.
>
> Eager to hear how you do with your larger monitor.
>
> Doug
>
> On 8/9/2020 3:10 AM, Josh Dersch via cctech wrote:
>> Hi all --
>>
>> Picked up a non-functional but otherwise nice looking DEC VR260 (19"
b&w
>> monitor) on the cheap, hoping to use it with my VAXstation 2000. From
> what
>> I've read, these were never the most reliable displays. Curious if
> anyone
>> has any information on common failure modes, or has service docs
> squirreled
>> away somewhere. I've at least found schematics, so I have something to
> go
>> on, but it's not exactly the most straightforward design I've poked at.
>>
>> Right now when powered up I hear a repeated low hum from the transformer
>> followed by a soft ticking noise so I'm guessing I've got power supply
>> issues at the very least. Unsure what I should expect the monitor to do
> if
>> it's not being fed a valid video signal (I haven't yet tried to hook the
>> VS2000 up to it) -- whether it'll go into free-running mode or do mostly
>> nothing until it has something to sync to...
>>
>> Thanks as always,
>> Josh
>
>