[Amps] Titan 425 will not turn on

[Mark Robinson]

I am working on my 425 right now with a similar issue. Here is another 
schematic

http://audiosystemsgroup.com/TitanPS.pdf


As you can see there is a interlock on the psu case and another 
interlock on the rf deck. In my case I can hear the relay K1 clicking on 
but my traces have been burnt away on the AC board so there is no 240V 
making it to the primary of the transformer. There are some pictures here

http://www.eham.net/ehamforum/smf/index.php/topic,111626.0.html


Can you hear the relay K1 in the PSU clicking on when you turn on the 
power on the RF deck? The schematic should make things clearer. There 
are some variations between 425 builds but the basic concept is the same 
across the builds.


73 Mark N1UK




On 25-Oct-16 2:03 AM, Jim Brown wrote:
> There is a nearly complete set of schematics on my website. 
> k9yc.com/publish.htm  I put them together about 10 years ago to help 
> myself with troubleshooting the keying logic in one of the three I own.
>
> The power switch is on the RF deck. Power is interlocked -- there are 
> one or two micro-switches at the rear of the RF deck, so the top cover 
> must be firmly in place (with the rear-most screws tight) for the 
> switches to make so the amp can turn on. I don't remember if there are 
> any in the PSU.
>
> 73, Jim K9YC
>
> On Sat,10/22/2016 3:55 PM, Ken Asmus wrote:
>> I am trying to sell some equipment from a local ham who is ill. One 
>> of the
>> items received is a Ten-Tec Titan 425 amp.
>>
>> This amp does not power up. Fuses on the external power supply are 
>> ok. The
>> High Voltage interconnect cable is ok.
>>
>> There does not appear to be a power switch on the external amp. Is the
>> external power supply controlled from the main amp or is it always on 
>> when
>> connected to AC?
>>
>> Any suggestions on where to start?
>>
>> Thanks,
>> Ken VA3KA
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