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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...

Thanks. Will check this afternoon.

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...