Re: Alarm system transformer + power supply (would both go bad at once?)

[Tony Hwang <dragon40@xxxxxxx>]

Danny D'Amico wrote:
> On Mon, 25 Nov 2013 22:03:11 -0700, Tony Hwang wrote:
>
>> You checked the state of that Omron relay? Is it it NC or NO relay. Is
>> the contacts closed now or open, is the coil OK? Diode, and Zener...
>> If you are going after ICs, Huntron tracker comes handy.
>
> Hi Tony,
> The new power transformer solved (almost) all the problems!
>
Hi,
Good for you. From the beginning I told you to replace x-former,
check all the components on the board and test the battery with
automotive 12V bulb. Maybe you have selective
hearing or reading?, LOL! You are close to finish line now.

> As soon as it arrived, I tested its output voltage (20 VAC),
> which within the expected range:
>   http://farm6.staticflickr.com/5532/11078019855_b27612e531_o.gif
>
> The voltage from the secondary to the ground (middle screw)
> was weird (see picture where it's 3.5 volts on one side, and
> 1 volt on the other), which was wholly unexpected, but, probably
> not important.
>
> Even so, the moment I plugged in the power transformer,
> the D2212B circuit and the control panels came to life.
> There is 13.6V at the battery terminals without the battery plugged in.
>   http://farm8.staticflickr.com/7440/11078202723_a6deb1394f_o.gif
>
> I think, in the end, the only things that were bad were:
> 1. The transformer secondary blew out
> 2. The D135A capacitor seems to have been overheated
> 3. The battery is apparently bad
>
> Luckily, all those are easy to fix!
>
> I'm not sure *how* to read what the control panel is trying to
> tell me since it only says "Call for Service", but, I'm pretty
> sure it's trying to tell me the (bad) battery isn't connected.
>   http://farm4.staticflickr.com/3765/11078125064_68d907e787_o.gif
>   http://farm4.staticflickr.com/3829/11078125174_95cb163704_o.gif
>