Might also check the backup battery.
On Nov 6, 2012, at 9:34 AM, Carl Moreschi <n4py3@earthlink.net> wrote:
> Also, this could easily be caused by one of the pins on the cable behind the
> front panel not making good contact. I have seen this many times on
> different Orion's and you can get almost any symptom from this.
>
> Remove the front panel and remove all the connectors, spray them with a good
> contact cleaner, then plug and unplug them several times. That has fixed
> several Orion's lately.
>
> Carl Moreschi N4PY
> 121 Little Bell Dr.
> Hays, NC 28635
> www.n4py.com
>
> On 11/6/2012 9:37 AM, Robert Mcgraw wrote:
>> Most likely on the power distribution board and the -20V not coming up.
>> Likely cause, filter caps need replacement. I suggest using the same
>> value of MFD and Voltage but go to 105 degree C rated components.
>>
>> Your power up and then down and then back up and it works is the key to
>> the target issue.
>>
>> 73
>> Bob, K4TAX
>>
>>
>>
>>> Several times in the past few days my O2 (firmware 3.028) has had no
>>> transmit output, and no audio output except faint background hiss, when
>>> I first turn it on. The paddles produce a nice sidetone, but neither the
>>> Orion's nor the antenna tuner's meter moves.
>>>
>>> So far, at least, switching the Orion's power off and then back on has
>>> restored operability (e.g., the tuner's meter shows forward power 115w
>>> on 80m CW). I just checked the power supply (it's on the floor under the
>>> desk) and found its meter showing 13v --- lower than I thought but not
>>> likely the source of this problem. Obviously I'd rather not have to rely
>>> on the off-on "fix." Any suggestions?
>>>
>>> --
>>> John K3GHH
>>>
>>> _______________________________________________
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>>> TenTec@contesting.com
>>> http://lists.contesting.com/mailman/listinfo/tentec
>>
>>
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