Rock-Ola 429 Overcome Mute

[TCW]

I am looking for a way to use a toggle switch to overcome the mute circuit to play some Bluetooth through the amp. I couldn't follow whammoed's example: jukeboxaddicts.proboards.com/thread/2853/fitting-bluetooth-receiver-jukebox

Mute Assumptions: Adding a ground using a switch to the other side of the Mute relay contacts. This alone didn't work me.
Do one of the Micro Switch's need to be overcome as well?

Input Assumptions: A couple of Female RCA pigtails to solder into the volume control. Grounds all together with right to Red and Left to Green?
I haven't tried this yet.

Manufacturer ‎Esinkin
Bluetooth Audio Adapter
ASIN# ‎B016NUTG5K
Amazon $23.99

[jukenorman]

Hi Tom,
I think you're barking up the wrong tree here, you shouldn't need to do anything with the mute relay. I'm assuming that you wish to use your bluetooth adaptor when the jukebox has completed playing selections? In which case, what you need to be switching is the AC supply to the amplifier. At rest the play control relay is de-energised. When a selection is registered, the play control relay is energised - this switches AC to the amp and turntable and also the 28VDC. So the amp is powered and also muted at the same time. If the jukebox is at rest, the mute relay is de-energised so no need to do anything with it.

Norman.

[whammoed]

I've done this exact thing to a 464. I no longer have this juke but I disabled the mute relay by putting a switch inline with the purple wire I believe. I used a Bluetooth module that switched automatically between a source and the bluetooth signal so I tapped in before the volume, sent the signals into the module, and the module output back to the volume. The module put a preference on the Bluetooth where I like the preference to be on a record playing but it worked quite well.
This appears to be an updated version:

www.ebay.com/itm/165638700209

**Edit: not sure what would be different on a 429.  My amplifier was a 48350-1A.

[whammoed]

On mine for the signal wires going to volume pot Green is right channel and Orange-Green is left. Ground is chassis ground.

[jukenorman]

Hi Darren,
The 429 and 464 are quite different with regard to amplifier power and muting. The 464 amp has DC supplied from the power supply and it's not switched by the play control relay. The mute relay will also always be energised when the jukebox is not playing a record. The 429 operates as I described above in my reply to Tom.

Norman.

[whammoed]

Thanks Norman. Definitely clearer after re-reading your reply. Needs to get power to the amplifier instead of disabling the relay. Guessing tapping into the signal wires before the volume should remain similar though no idea if the wire colors between the models was consistent at all. Still sounds easier than what I had to do to my Wurlitzer to add background music.

[TCW]

Dec 19, 2022 17:07:01 GMT jukenorman said:

Hi Tom,
I think you're barking up the wrong tree here, you shouldn't need to do anything with the mute relay. I'm assuming that you wish to use your bluetooth adaptor when the jukebox has completed playing selections? In which case, what you need to be switching is the AC supply to the amplifier. At rest the play control relay is de-energised. When a selection is registered, the play control relay is energised - this switches AC to the amp and turntable and also the 28VDC. So the amp is powered and also muted at the same time. If the jukebox is at rest, the mute relay is de-energised so no need to do anything with it.

Norman.

Norman,

I put a switch in paralleling the AC contacts on the Play Relay to supply power to the Amplifier/Turntable. Something I noticed right away. I had just finished having this play a record and tested the volume by dragging my fingerprint across the needle. After it returned the record I put it in the new "Override" condition and dragging my fingerprint across the needle it was noticeably quieter (75%?). I'm uncertain as to why the amp isn't driving as hard now. Do you have any thoughts as to why this is? If I leave the Bluetooth operating and cue a record and just as the needle sets down (I prevent the needle from playing on the record) the volume is suddenly MUCH improved but at full volume is still only at maybe 50 - 60% of a record playing at full volume. Oh, and I have my phones volume at 100%.

[jukenorman]

Hi Tom,
I don't know tbh! If you plug the amplifier into an unswitched AC outlet (eg one of the lighting supplies), does it return to normal volume?

Norman.

[TCW]

Just before I had started the Bluetooth this thing would periodically not stop at the home position. I of course started at the switch making sure it was positioned properly. That wasn't the issue because it still wouldn't find home. After multiple iterations of this problem I just now found that the wobble plate was dragging because of pour fitment were it attaches on the wobble plate solenoid plunger and was consequently was getting stuck. Is this missing something like a washer or is this how it is held on?

[jukenorman]

I really don't know! Does your manual have a parts list you can refer to? The nearest that I have is a 435 part list.

Norman.

[TCW]

It doesn't show any additional clip or washer. I looked up a photo of the newer Mod 474 Rock-Ola with a new design. The steady the movement of the wobbler plate arm by attaching it to the microswitch plunger with a screw/washer. This way it doesn't rub and jam against the opening in the back plate like mine does. When this happens it looks for a selection to read-out that isn't there.