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The bell box is 1 year old and I believe that the timer is set for 20 minutes. The peak value of the rectified half cycle is greater thatn the mean value of 10.5 volts that is being measured by the meter and is also greater than 12 volts and it is this peak, which is only present for part of...

The alarm panel has been in use for 19 years so I do not really believe that the components were necesarily 'borderline' in their duty. Compare this service with failures in the power supplies of some entertainment type set-top boxes where capacitors often break down after not much longer that...

The manager of the company called today to take a measurement of the charging voltage. He recorded a charging voltage of 10.55 volts and a battery voltage of 13.28 volta. He said that he had come across this problem before with Optima panels and that usually it was caused by a diode going...

Thanks spsrkymarka. This helps me to decide which replacement alarm panel to have installed, should this become necessary. Alan

I thought that the XM would have a coventional type of power supply rather than a switched one, however as it was mentioned I had to ask anyway. As regards the engineer and his meter I was happy with his work but afterwards I did wonder about his meter, however he measured the battery...

Is the power supply in the Optima XM of the 'switching type'? My concern is that there has been a drop of sabout 2.6 volts in 12 months. Alan.

Thanks for that information, I thought that the power supply may be on a separate board to the main panel and could then be checked out easily but clearly I was wrong. If I do have problems with the intruder alarm then I intend to have a replacement panel installed, ether Optima or Texaom, as...

Many thanks for the replies. I asked the engineer how the charger could be charing the battery and he tried to explain to me tht the 10.3 volts was sufficient to provide some charge. I said that I would be surprised if this was the case but he insisted that this was the case. I do...

Thanks for that. I queried this with the engineer before he lecft and he insisted that it was OK . I wondered if this was a forewarning that the panel may need replacing in the not too distant future. It is almost 19 years old, however everything is working OK. Is it possible to refurbish...

Hi - This is my first posting and I wonder if anyone can advise me please. I have an Optima XM6 intruder alarm panel which had its annual service last week. The engineer's report states that the battery voltage was 13.03 volts and the charging voltage was 10.53 volts. These readings compare...