Silent Knight IFP-50 Fails to power on

Fire Alarm Help
1

I know this is a long shot but I figured it’s worth a try.

Recently acquired a trashed IFP-50 FACP. With the exception of the loose LCD due to missing screws, there is no visible damage to any of the boards or the can.

When 120V is sent into the transformer, you hear the infamous “hum”, but nothing else. There is around 30VAC on the secondary end of the transformer. The piezo remains silent and the display/LEDs reman off. There are no relays that kick on or anything else that shows the board is functioning.

I also measured the voltage across the battery leads without success. Let me know if you have any suggestions. If I can’t fix it, I’ll probably use the can and transformer for something else and toss the rest.

2 Likes
2

make sure none of the traces are cracked but that can be a very time waster

1 Like
3

As stated earlier, there is no visible damage to the main board or any of the other components surrounding it. This includes the traces, they are all intact.

1 Like
4

Perhaps there are some loose connections somewhere? Or even blown fuses.

1 Like