IN THE MANUAL IT SAYS ; THERE ARE FOUR FUSES MOUNTED ON THE CPU CIRCUIT BOARD. ALL ARE 20mm QUICK BLOW.
THE TOP FUSE MARKED KEYPAD IS RATED 1 Amp AND PROTECTS THE 13V SUPPLY.
THE 13V AND SPEAKER AND BELL AND STOBE OUTPUTS ARE EACH PROTECTED BY A 1AMP FUSE AS MARKED ON THE PCB.
THE BATTERY PLUS VE INPUT LINE IS PROTECTED BY A 1.6 AMP FUSE MARKED BATT ON THE PCB WHICH WILL BLOW IF EXCESSIVE CURRENT IS DRAWN FROM THE BATTERY OR IF THE BATTERY IS REVERVED POLARITY CONNECTED DURING INSTSALLATION.
DOES THIS HELP?
WARRIOR
November 2009