[TenTec] Orion II Won't Power Up

[Gary Follett]

Doing a reset at this point will do nothing because the CPU is not getting any power if K1 is not pulling in.

Gary

W0DVN

> On Jan 18, 2020, at 9:50 PM, Bernie Skoch via TenTec <tentec at contesting.com> wrote:
> 
> I've confirmed that 12vdc is making it past the molex connector and onto the pins of the circuit board.  I've removed the power protection diode from the circuit with no change.
> Master reset goes nowhere.
> I'm flummoxed.
> 
> -----Original Message-----
> From: Bob McGraw K4TAX <rmcgraw at blomand.net>
> To: tentec <tentec at contesting.com>
> Sent: Sat, Jan 18, 2020 9:37 pm
> Subject: Re: [TenTec] Orion II Won't Power Up
> 
> Recheck all power connections from the power supply to the radio.   The 
> white Molex connector for DC power on the radio is known to be 
> problematic.  Make sure all is tight there.
> 
> If the transient diode has failed it may short to ground which should 
> blow the fuse or over current the power supply.   If the diode is open, 
> it won't make any difference.  Except you won't have transit protection 
> on the DC line.
> 
> Try a Master Reset from a Power Off condition.
> 
> 73
> 
> Bob, K4TAX
> 
> 
> On 1/18/2020 9:14 PM, Bernie Skoch via TenTec wrote:
>> In the middle of transmitting today, my O2 went stone cold dead.  We had high winds that may have briefly shorted the antenna.
>> DC power into radio is good.  Fuse good.
>> There is a component labeled 5KP15A that appears to be a transient voltage suppression diode near the 12VDC input.
>> Any clues of whether that might be what blew?
>> Thanks.
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> 
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