York 863 audio chip

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NightProwler
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York 863 audio chip

Post by NightProwler » 24 Apr 2018, 10:19

Hey all, Quick question about audio chips. I got a York 863 here and the volume is quiet, It has to be almost all the way up to hear anything and also there is no out going audio. Could this be the audio chip or do I need to look elsewhere?

Cheers everyone...Rich :thumbup:
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The Collector
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Re: York 863 audio chip

Post by The Collector » 24 Apr 2018, 11:10

It may be because of the mic' issue. When you haven't got a mic' plugged into a Cybernet-based radio, the audio is very very low. If the mic' is faulty it might not make a circuit that brings the audio alive? Try another cybernet-type mic' in it.

I'm no expert on mic's or radio internals though so I may be talking out of my bottom ;)

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Re: York 863 audio chip

Post by NightProwler » 24 Apr 2018, 11:46

The mic is fine as I tried it on another York 863 I have, The internal speaker is also fine :think:
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Re: York 863 audio chip

Post by cb4ever104 » 24 Apr 2018, 12:11

What about an external speaker Rich . Still the same ?
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Re: York 863 audio chip

Post by NightProwler » 24 Apr 2018, 12:58

Yep I tried that too
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Re: York 863 audio chip

Post by NightProwler » 24 Apr 2018, 12:59

Do audio chips act like this when they go 'bad' or is it a case of they either work or they dont, If that makes sense?
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Re: York 863 audio chip

Post by Buick Mackane » 24 Apr 2018, 13:17

Could be a faulty electrolytic capacitor in the audio chain
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Re: York 863 audio chip

Post by cb4ever104 » 24 Apr 2018, 13:43

NightProwler wrote:
24 Apr 2018, 12:59
Do audio chips act like this when they go 'bad' or is it a case of they either work or they dont, If that makes sense?
Don't know . Never had a faulty one (yet :)) . You really need a scope so that you can do some measuring .

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Re: York 863 audio chip

Post by NightProwler » 24 Apr 2018, 15:28

Buick Mackane wrote:
24 Apr 2018, 13:17
Could be a faulty electrolytic capacitor in the audio chain
Thats what I was thinking old bean :)
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Re: York 863 audio chip

Post by sickboy » 24 Apr 2018, 17:33

Here's a handy page for your bookmarks
http://www.m0ysu.com/CybernetRepairsPage-2017.html

Especially this part:
Replace audio IC (TA7205) which also sometimes affects outgoing modulation too. NB. If you rub your finger across the back of the
Audio IC with the volume up and it makes a sound chances are the IC is fine and the fault lies elsewhere. If its completely dead its
more than likely the Audio IC.
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Re: York 863 audio chip

Post by NightProwler » 24 Apr 2018, 18:36

sickboy wrote:
24 Apr 2018, 17:33
Here's a handy page for your bookmarks
http://www.m0ysu.com/CybernetRepairsPage-2017.html

Especially this part:
Replace audio IC (TA7205) which also sometimes affects outgoing modulation too. NB. If you rub your finger across the back of the
Audio IC with the volume up and it makes a sound chances are the IC is fine and the fault lies elsewhere. If its completely dead its
more than likely the Audio IC.
Ahhh Ive just tried that and it made no difference, I'll borrow an audio chip from another Cybernet radio and that should tell me. I dont really want to do that but at least I will know. Cheers Steve :thumbup:
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Re: York 863 audio chip

Post by cb4ever104 » 24 Apr 2018, 19:37

Put your tongue on the power connector terminals as well to see if the 12V is present 😀
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Re: York 863 audio chip

Post by NightProwler » 24 Apr 2018, 20:21

I'll dangle my balls over the board instead :wtf:
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Re: York 863 audio chip

Post by cubwolf » 24 Apr 2018, 20:52

Look at the caps just behind the audio chip.
C105 tends to fail.
Also while you are in there check C78 just in front of the 455 filter as almost everyone i have seen lately has started leaking.

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Re: York 863 audio chip

Post by NightProwler » 24 Apr 2018, 21:23

Just had a quick look and C102 appears to be leaking, The others look ok. I'll replace them and report back. Thanks for your help :thumbup:
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