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

[Danny D'Amico <danny@xxxxxxxxxx>]

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!

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