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blown fuse?

which fuse would I have blown, there only appears to be two on the PCB and one of those is for the battery. The other one hasn't blown, what should \i be looking for?
Wayne, June 2010
As you guys obviously help people out in these sort of situtations and I appreciate you have many years of experience but the answer a "blown a fuse" does not help to my original question which acorn answered to "I have a fault on my system" because you did not say which fuse had blown (That would have been really helpful). I have spoken to Nick who was more than helpful over the phone in regards to this.
However the "blown fuse" question did not link to my original request which acorn answered, but no need for sarccy comments.
Ps I did use a multi meter, I have over 10 years experience in fire alarms but not Intruder systems so the basic knowledge of components is there, but we are not all experts.

Wayne, June 2010
Once again Acorn well said, The amount of people who ring me and say, i know a fuse hasnt gone because im looking at it.
People you are reading two reply's from very able burglar alarm engineers with over 50 years experience between us,
You cannot see a blown fuse with your eyes, and i dont care how good your eye sight is.
We use multi-meters, and even if you have one, you would need to understand what the reading's mean in ohms, oh yes for those reading this, ohms is a measurment of resistance.
If you dont understand what you are doing, simple dont touch it.
Regards
Nick 07842 480037

Nick, June 2010
"what should I be looking for?"

Absolutely no idea because you don't supply even the basic information

Why are you looking for a 'blown' fuse?
What panel is it?
How do you know one of those two fuses is blown?
What makes you think one of these is blown?
How are you checking these fuses, looking does not do it?

acorn, June 2010