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Post by stuglad on Apr 10, 2022 8:06:05 GMT
Hi All
I have an R86 that was working fine. However, after moving house, the machine will only play in low volume (the machine was packed and bolted down correctly for moving). The volume knob on the rear of the box has no effect. There is sound coming from all speakers top and bottom. You can hear the selection ok (it’s a little on the low side) but just no ability to turn up or down. All what I think are relevant connections have been unplugged and plugged back in and checked visually. Are the volume knobs known to fail or require cleaning. Or maybe an amplifier issue?
Any thoughts or advice greatly received.
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Post by Ron Rich on Apr 10, 2022 14:34:07 GMT
My GUESS is-- Your phono had a "rough ride"- You have broken the two mini lamps used for the volume control "ballast", on the PC Board. I do not recall the correct lamp number but I do know two #2182's in series, can be used for each one-- suggest you use some "RVT" to stick them to the board. Ron Rich
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Post by stuglad on Apr 11, 2022 8:16:46 GMT
Thanks Ron. Strangely, the problem has changed! When I returned to the machine to look at your suggestions the selection will now play and the volume will go up and down. However, the sound is crackling badly from all speakers.
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Post by Ron Rich on Apr 11, 2022 13:31:51 GMT
Yep-- that sounds now like the "common Rowe problems" in the sticky above-- didja read that sticky ?? Ron Rich
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Post by stuglad on Apr 11, 2022 19:53:46 GMT
Erm. Sorry to be dumb but what is RVT?? 🙈
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Post by Ron Rich on Apr 11, 2022 22:07:39 GMT
No problem-- it ain't 'dumb" to ask questions, when you don't understand ! RTV is another name for glue-- the bathtub sealant used around the tile to keep the water out--Ron Rich
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Post by stuglad on Apr 14, 2022 10:22:04 GMT
Hi Ron
Gotcha. We call it silicone sealant or mastic in the UK. That’s the confusion ! 😁
I’ve had the pay board off and all the joints look sound. It was serviced and repaired by Alan Hood (Ami man) in 2019 and it all still seems in order. Unfortunately Alan doesn’t seem to be around anymore.
It’s odd, it’s kind of ok playing at low volume but now ‘breaks up’ when volume turned up.
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Post by Ron Rich on Apr 14, 2022 11:59:54 GMT
Yes--- but "RTV" is easier to spell/type -- and I'm lazy ! Ron Rich
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Post by stuglad on Apr 14, 2022 12:33:17 GMT
Ha. No problem.
Any idea on where else to look?
I’ve been all over the pay board joints and all contacts are sound.
Thanks
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Post by stuglad on Apr 14, 2022 12:34:16 GMT
Crackling at higher volume now.
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Post by Ron Rich on Apr 14, 2022 12:53:15 GMT
Which model amp is this ? Is this the amp with the mini lamps in the volume control section ?? Ron Rich
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Post by stuglad on Apr 14, 2022 13:09:21 GMT
It’s a mk4 amplifier. Rainbow Manufacturers 1982.
I can’t seem to attach a picture to the post.
Thanks
Stuart
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Post by stuglad on Apr 14, 2022 13:10:43 GMT
And it’s back to one low volume - no crackle!🙈
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Post by Ron Rich on Apr 14, 2022 13:26:35 GMT
Hi Stuart,
OK--- This is why you, and everyone is asked to read the "Hi Newbies" post in our FAQ's section, and fill in their information in the User Introductions section posts-- ANYTHING I have told you about this amp has been nothing but a waste of time !! You did not say you were in the UK--This is NOT an AMi/Rowe built item-- It was made only for use in the UK-- I have never seen one in person-- there is a discussion below and a photo of it posted. Ron Rich
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