[TenTec] Orion problems

[Steve]

Voltages are good at the A( board but I will scope them this morning.  It
has been recapped.  I checked the input to the Logic card of the both the
main and sub receivers and can see them when I apply a 14.250 Mhz signal
to the input.  However, the Sub Rx input level is quite a bit higher than
the main Rx input level.

I too am trying to find the signal path thru the logic board to find out
why the boot sequence will not see the V2 mod.  The V2 Mod is one wire
and two cuts.  I have checked it and the mod is there and correct.  .
Probably should follow the signal path from the mod to the DSP's.  The
previous owner told me he woke up one morning and the radio would no
longer work...

Steve NU0P

-----Original Message-----
From: TenTec [mailto:tentec-bounces at contesting.com] On Behalf Of Jeff
(W4DD)
Sent: Tuesday, September 26, 2017 4:53 AM
To: Discussion of Ten-Tec Equipment <tentec at contesting.com>
Subject: Re: [TenTec] Orion problems

I would start by confirming voltages on the A9 board.  Also scope them.

Then confirm they are getting to the dsp's.

As I recall, the v2 mod is a single strap, but don't recall the details.
I would focus on why the cpu can't read the strap.  I'll try take a look
at the schematic tonight.

Not sure if anyone has ever pubished the boot sequence but that would be
handy.

On Sep 25, 2017 11:57 PM, "Steve" <sswhite at mchsi.com> wrote:

The A9 board has been updated.  Since there is output from the rcvr to
the Logic board and no audio out of any kind it makes me wonder about the
DSP and CODECS on that board.  I went and loaded Ver 1 software but that
made no difference either.

Steve

-----Original Message-----
From: TenTec [mailto:tentec-bounces at contesting.com] On Behalf Of Peter
Frenning [OZ1PIF]
Sent: Monday, September 25, 2017 5:15 PM
To: Discussion of Ten-Tec Equipment <tentec at contesting.com>; Steve
<sswhite at mchsi.com>
Subject: Re: [TenTec] Orion problems

Den 25-09-2017 kl. 22:31 skrev Steve:
> Orion 1..Battery is good too...I wonder if I can put a 14 Khz 
> unmodulated signal into the DSP input  (J20) and find out if the whole 
> DSP chain is working..
>
> Steve
Has anybody suggested checking out the A9 board? Any of a whole box of
Gremlins can emerge from troubles there. When mine (O2) started acting
erratically I updated the thre 470uF electrolics to lower ESR/higher temp
ones, and all my troubles went away, many other similar experiences has
been related here over time.

--
Vy 73 de OZ1PIF/5Q2M, Peter

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