Accenta 6 Alarm System

[nigew01]

Can anyone Help?
This alarm was installed (1997) before we moved in...
Alarm has stopped working for no reason. The whole system seems to be dead and has no power to it whatsoever...I've checked the 3 fuses in the main Box and the have not blown..but there seems to be no power to the PIR's, Key Pad...etc
Any Ideas?
Cheers
Nige

 

[sparkymarka]

2 things has it ever had a battery ? If not there is a large resistor on the pcb is it burnt out ? And how did you check the fuses ?

 

[nigew01]

There is a large Grey oblong Battery in the Main Box, it has not been replaced as far as I know? (Where can I get a replacement if this is the cause of the problem?
There are 3 fuses (Silver tops, glass housing) on the pcb, one top left & 2 next to each other bottom left...I removed them and checked if the fuse wire was still in tact, all three seemed to be OK

 

[sparkymarka]

Post a picture of the pcb in the main box, you can get a battery from screw fix just looking at the fuse may not be 100% accurate.

 

[nigew01]

Cheers...will try to get one posted tomorrow
Many thanks
Nige

 

[nigew01]

Not sure if these are clear enough to assess?

View media item 66588 View media item 66589 View media item 66590 View media item 66591

 

[Europlex]

If it is, a 15 year old battery could cause your problems, just surprised it has not done this sooner.

It looks like there has been some sort of short circuit at some time.

Note the burnt area around the first two diodes to the right of the pair of fuses.

 

[nigew01]

Thank you...Does this mean I need to replace the whole board?...I'm not an expert in this area

 

[sparkymarka]

Normally the large resistor R47 above the large blue capacitor would be burnt that looks ok the heat marks around the diodes are pretty standard, first check transformer output ac disconnected from main board 17-21 v ac if ok re check when connected back, then check aux volts (dc) on pcb with cables disconnected, 13.80 dc and bell + disconnected. Have had a panel where an issue with the bell was pulling the aux volts down to 2 v but not blowing fuse.

 

[Europlex]

New battery

 

[nigew01]

Hi,
New Battery Installed, and did find a blown fuse located next to the mains power feed so all seems to be working and there is power to the alarm...except now have a new problem - I have tried to reset the alarm using the key pad but it looks like the original installer may have set a unique engineer reset code when it was installed 15 years ago (No longer trading) which is not on any of the paperwork we have
Any ideas?

 

[sparkymarka]

Do factory reset.

 

[nigew01]

Thank you...Sorry to appear thick...How do I do that, I'm not really a techy,
just muddle through!