Rowe CD100 amp replacement

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Random thoughts. Has anyone ventured to replace the cd100 amp with something different?

Amp rebuilds are fairly pricey these days(~$350), significantly more than modern amps.

What is haven't sorted yet is the mute circuit on the amp. I've skimmed the schematics briefly but haven't dove in deep yet. I do know the speakers don't work if you pull the connector.

Can anyone dummy down the mute circuit?

Anyone replaced a cd100 amp with a modern amplifier?
 
Those amps are pretty solid, and usually not too tough to repair. I doubt it would need a full rebuild. I don't recall ever having trouble with the mute circuit on one... but I imagine it can be solved with a little persistence.

I don't know of any reasonable drop-in replacement. Seems like any attempt to fit something else in there is going to be a bigger challenge than just fixing what you've got.
 
Those amps are pretty solid, and usually not too tough to repair. I doubt it would need a full rebuild. I don't recall ever having trouble with the mute circuit on one... but I imagine it can be solved with a little persistence.

I don't know of any reasonable drop-in replacement. Seems like any attempt to fit something else in there is going to be a bigger challenge than just fixing what you've got.

I wasn't clear, I don't have an issue on the mute circuit. I don't have a clue what it is/does. That question related to the idea of replacing the rowe amp with something else and how that would be affected.

Unfortunately repair requires shipping the unit out to someone who works on
rowe amps which is quite expensive. A quick repair isn't really going to be an option without a local shop.
 
Yes. Have multiple cd100 units. Symptoms follow the bad amp

Hmm. Well, if you want to learn to repair amps yourself, you're in a great position to do so, because this a very well-designed and built unit... and you've got other working units, making it easy to compare readings/swap parts. Checking the fuses and the power transistors is a great place to start... followed by the power supply voltages within the amp.

If you don't want to do that, I guess your best option is to pay someone else to do the work. Or just sell the jukebox as-is to someone who wants a good DIY project.
 
Hmm. Well, if you want to learn to repair amps yourself, you're in a great position to do so, because this a very well-designed and built unit... and you've got other working units, making it easy to compare readings/swap parts. Checking the fuses and the power transistors is a great place to start... followed by the power supply voltages within the amp.

If you don't want to do that, I guess your best option is to pay someone else to do the work. Or just sell the jukebox as-is to someone who wants a good DIY project.
I'm definitely going to dive into the schematics a bit more when time allows. I am far more knowledgeable with pinball machines than these monsters.

I did pull apart the amp and do a visual inspection and some preliminary basic testing. Nothing jumping out. No burnt resistors, swollen/burst capacitors or any conventional failures
 
I did pull apart the amp and do a visual inspection and some preliminary basic testing. Nothing jumping out. No burnt resistors, swollen/burst capacitors or any conventional failures

They are almost bulletproof. Most failures came from external speakers being wired up incorrectly, overloading one or both channels... or other operator error.

I've also replaced the bridge rectifier on a couple of occasions. I think those just die sometimes.

Check those fuses for continuity and correct type/value.
 
Im going to make an attempt to repair this amp. Any input or ideas on the symptom? Video with audio below.

Amp Fault
As soon as the amp is plugged in, it starts to make this terrible noise. Different amp in the same machine works fine.

This amp worked fine until a storm that lead to a power outage a few weeks back. Every other component in that machine is working fine.
 
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