BPT intercom not communicating

[Johnelh]

Hi
I have a fairly old BPT system installed: H200 entry panel; E310 PSU; XP/3 handsets (3 of them).
It has worked pretty well for 10+ years, but following a fairly close lightning strike the H200 and one of the handsets have failed.

I was advised to change the H200 audio module (this fix worked after a previous lightning strike). Done, and no change.

There is no beep at the H200 when the call button is pressed, but 2 of the interior handsets beep. There is no audio other than that.
The panel light of the H200 is also not working.
I have tried plugging one of the working handsets into the non-working unit, with no result.

Is it possible that the E310 is damaged? How can I check this?

 

[sparkymarka]

Check voltages at psu ….as it is multi output ….better to first check with items disconnected as one of these may be shutting down the psu ..

 

[sparkymarka]

Check at these pairs

 

[Johnelh]

Thanks. Will check this afternoon.

 

[Johnelh]

I disconnected the mains power for 60s before testing
Before re-connecting, disconnected the + power feed to the HA200 and the handsets
Tested:

Pair B7/8: 12.07v
Pair B9/11: 18v
Pair B 10/11: 0v
Pair C 1/5: 12v

Re-connected the + feeds and re-tested the PSU. Got the same values.

Forgot to mention initially that the gate motor triggers correctly from all of the handsets