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JVC R-K22 Receiver won't keep AM/FM presets

 
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raymondjiii



Joined: 17 Jun 2006
Posts: 1

PostPosted: Sat Jun 17, 2006 2:45 pm    Post subject: JVC R-K22 Receiver won't keep AM/FM presets Reply with quote

FM/AM presets will stay as long as the machine is on but if left off (AND still plugged in) for about a day or so they are lost.

This machine has a Toshiba chip which controls the radio functions. I would guess a capacitor is not holding a charge to this chip? Or the chip itself (Toshiba TC9147AP)? There does not appear to be any on-board battery.

Thank you.
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PostPosted: Sun May 28, 2017 11:06 pm    Post subject: Jvc r-k22 Reply with quote

My daughter just blew the transformer in my r-k22, 33 years old, bought after saving all my money at 15 years old. Fixed radios in Marine Corps, so was able to test and it's the transformer. Any idea where to get replacement? Besides the fact that this cranks my outdoor Bose speakers, it has sentimental value...
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jts1957



Joined: 24 Nov 2008
Posts: 2453
Location: Far, Far Away

PostPosted: Mon May 29, 2017 1:30 am    Post subject: Reply with quote

http://imgur.com/a/d4OeQ

'TH FUSE' internal to the transformer's primary may have opened. Many times carefully dissecting the transformer to get to primary wiring may reveal the terminals. Then is just a matter of 'bypassing' the THermal FUSE.

Of course, the transformer will NO LONGER have any thermal protection.
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rothana



Joined: 09 Jul 2017
Posts: 5

PostPosted: Sun Jul 09, 2017 12:37 am    Post subject: Reply with quote

JVC R-K22 Receiver won't keep AM/FM presets ... FM/AM presets will stay as long as the machine is on but if left off (AND still plugged in) for ...

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