UNIDEN 400 PR27GB Problem

Place to come if youre having technical issues, including mic wiring
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TheMagnum
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Joined: Mon Nov 06, 2017 2:36 pm

Hi all, I bought one of these off eBay and it looks in VCG cosmetically and inside the board is in good clean condition. I replaced the protection diode as a matter of course and testing it the removed diode was working fine so no signs of cross connection. no signs of 24v damage and no signs of butchery.

The problem is when switched on the TX and RX lights both illuminate and there is no channel display... no sound, in fact nothing TX'ing on the mic the RX light goes off but it isn't on any channel, almost like it is in PA mode type thing. The board is different to the Audioline 341 and I have no circuit diagram. The board is a PA-198 AB. May be more than one fault? any ideas?? :cry:
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carlos73
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Mines is doing exactly the same did you find out what the problem was ?
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stampman
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Joined: Mon Apr 24, 2006 3:36 pm
Location: lancaster

reads like it has been fried needs a good repair man to sort it


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NoName
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Switch cleaner on the CB/PA switch?
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rhythmstick
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NoName wrote: ↑Mon Mar 08, 2021 2:19 pm Switch cleaner on the CB/PA switch?
Or try temporarily bypassing/eliminating the switch?
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