Re: DSC 1575 : trouble light for AC power stays on

["Jon Aichberger" <jon.aich@xxxxxxxxxxx>]

Sounds like the bridge rectifier to me. i have had a number of dsc panels
show the same problem. a new bridge would cost less than $5 if you want to
replace it yourself.
"R.H.Campbell" <rh.campbell@xxxxxxxxxxxxx> wrote in message
news:4Iv%f.4406$fo1.192321@xxxxxxxxxxxxxxxxxxxxxxxx
> Rob, check the voltage level coming in from the panel transformer at the
> actual panel terminals. Sometimes if the AC voltage coming in the home is
> too high, the end voltage going in the to panel will end up being too high
> (or low) as well, and the panel will give a false "AC trouble" message.
> Voltage below 12 v AC or above 20 volts AC at the panel might cause this.
>
> The other possibility is the rectifier on the board has blown and your
> board is toast.
>
> A last resort (although I very much doubt it will help) is to hardware
> default the panel and reprogram.
>
> There may be other causes but those are a couple of the ones I have
> discovered that cause weird AC trouble failures.
>
> R.H.Campbell
> Home Security Metal Products
> Ottawa, Ontario, Canada
> www.homemetal.com
>
>
>
> "gjertsen" <gjertsen@xxxxxxxxxx> wrote in message
> news:1144947817.491857.136430@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
>> I've been troubleshooting this DSC 1575 system for my wife's house.
>> The system had been dead for quite a while when I looked at it, so I
>> replaced the battery first. Then I replaced the transformer (no
>> continuity on the output terminals) and the system powered up
>> OK.
>>
>> I had to reset the system clock to turn off one trouble code.
>> The problem is that the trouble light stays on and indicates
>> another trouble code: AC power loss (get a 2 after "* 2" sequence).
>> I'm trying to figure out if there is a reset/clear that I need  to do,
>> or if perhaps there are other issues here. I removed the battery
>> temporarily for a quick sanity check and the system was
>> definitely getting power. Any pointers?
>>
>> Thanks,
>>
>> --Rob
>>
>
>