I remember many questions about model 2900 on this forum and now I have a head scratcher, well for me anyway. I’m trying to figure out why relay RY5 located in the amplifier burns up. I have -29.5vdc across it (calls for -28v) and all the voltages around it seem to be very close as well. When I take an AC measurement across RY5 I get 15vac, not sure if that’s significant? It’s been recapped but C35 (3000@50v) is original and tests good with an esr meter. Any thoughts on what might be causing this relay to overheat? I’ve never worked in a model 2900. Thanks, Mauro
Sent from my iPhone
It "burns up"? Do you mean it got fried and the new one is running very hot? If you check it's resistance when cold, then when it's very hot, does the resistance go down? That would indicate the windings are starting to short out. Without a schematic in front of me I can't say, but you may need to remove the wire(s) from one of the terminals to get an accurate reading.
How fast is it getting hot? Was it "smoking" hot? It is quite common for relays that stay energized to get hot.
On 4/5/2025 3:24 PM, M De Simone via Jukebox-list wrote:
I remember many questions about model 2900 on this forum and now I have a head scratcher, well for me anyway. I’m trying to figure out why relay RY5 located in the amplifier burns up. I have -29.5vdc across it (calls for -28v) and all the voltages around it seem to be very close as well. When I take an AC measurement across RY5 I get 15vac, not sure if that’s significant? It’s been recapped but C35 (3000@50v) is original and tests good with an esr meter. Any thoughts on what might be causing this relay to overheat? I’ve never worked in a model 2900. Thanks, Mauro
Yes, it actually burned up 2 coils and this was my friend’s last one from a parts chassis. He asked me to look at it as he was frustrated with it. With the amplifier powered on my bench it is very hot to touch within 2-3 minutes and it will burn up after 1 or 2 plays. I will check the resistance today and post it. Thanks,
Sent from my iPhone
On Apr 5, 2025, at 7:00 PM, Tony Miklos via Jukebox-list jukebox-list@lists.netlojix.com wrote:
It "burns up"? Do you mean it got fried and the new one is running very hot? If you check it's resistance when cold, then when it's very hot, does the resistance go down? That would indicate the windings are starting to short out. Without a schematic in front of me I can't say, but you may need to remove the wire(s) from one of the terminals to get an accurate reading.
How fast is it getting hot? Was it "smoking" hot? It is quite common for relays that stay energized to get hot.
On 4/5/2025 3:24 PM, M De Simone via Jukebox-list wrote: I remember many questions about model 2900 on this forum and now I have a head scratcher, well for me anyway. I’m trying to figure out why relay RY5 located in the amplifier burns up. I have -29.5vdc across it (calls for -28v) and all the voltages around it seem to be very close as well. When I take an AC measurement across RY5 I get 15vac, not sure if that’s significant? It’s been recapped but C35 (3000@50v) is original and tests good with an esr meter. Any thoughts on what might be causing this relay to overheat? I’ve never worked in a model 2900. Thanks, Mauro
-- Tony Miklos Tony's Jukebox Repair
Jukebox-list mailing list -- jukebox-list@lists.netlojix.com To unsubscribe send an email to jukebox-list-leave@lists.netlojix.com %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s Searchable Archives: http://jukebox.markmail.org/
I disconnected and measured the resistance of the coil in RY5, 39 ohms. Not sure that’s good or bad as I don’t know the original specs but it seems to pull in properly, just overheats.
Sent from my iPhone
On Apr 6, 2025, at 7:17 AM, M De Simone via Jukebox-list jukebox-list@lists.netlojix.com wrote:
Yes, it actually burned up 2 coils and this was my friend’s last one from a parts chassis. He asked me to look at it as he was frustrated with it. With the amplifier powered on my bench it is very hot to touch within 2-3 minutes and it will burn up after 1 or 2 plays. I will check the resistance today and post it. Thanks,
Sent from my iPhone
On Apr 5, 2025, at 7:00 PM, Tony Miklos via Jukebox-list jukebox-list@lists.netlojix.com wrote:
It "burns up"? Do you mean it got fried and the new one is running very hot? If you check it's resistance when cold, then when it's very hot, does the resistance go down? That would indicate the windings are starting to short out. Without a schematic in front of me I can't say, but you may need to remove the wire(s) from one of the terminals to get an accurate reading.
How fast is it getting hot? Was it "smoking" hot? It is quite common for relays that stay energized to get hot.
On 4/5/2025 3:24 PM, M De Simone via Jukebox-list wrote:
I remember many questions about model 2900 on this forum and now I have a head scratcher, well for me anyway. I’m trying to figure out why relay RY5 located in the amplifier burns up. I have -29.5vdc across it (calls for -28v) and all the voltages around it seem to be very close as well. When I take an AC measurement across RY5 I get 15vac, not sure if that’s significant? It’s been recapped but C35 (3000@50v) is original and tests good with an esr meter. Any thoughts on what might be causing this relay to overheat? I’ve never worked in a model 2900. Thanks, Mauro
-- Tony Miklos Tony's Jukebox Repair
Jukebox-list mailing list -- jukebox-list@lists.netlojix.com To unsubscribe send an email to jukebox-list-leave@lists.netlojix.com %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s Searchable Archives: http://jukebox.markmail.org/
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That's really odd. The right voltage and the right coil, I'm stumped.
On 4/6/2025 10:10 AM, M De Simone via Jukebox-list wrote:
I disconnected and measured the resistance of the coil in RY5, 39 ohms. Not sure that’s good or bad as I don’t know the original specs but it seems to pull in properly, just overheats.
Sent from my iPhone
On Apr 6, 2025, at 7:17 AM, M De Simone via Jukebox-list jukebox-list@lists.netlojix.com wrote:
Yes, it actually burned up 2 coils and this was my friend’s last one from a parts chassis. He asked me to look at it as he was frustrated with it. With the amplifier powered on my bench it is very hot to touch within 2-3 minutes and it will burn up after 1 or 2 plays. I will check the resistance today and post it. Thanks,
Sent from my iPhone
On Apr 5, 2025, at 7:00 PM, Tony Miklos via Jukebox-list jukebox-list@lists.netlojix.com wrote:
It "burns up"? Do you mean it got fried and the new one is running very hot? If you check it's resistance when cold, then when it's very hot, does the resistance go down? That would indicate the windings are starting to short out. Without a schematic in front of me I can't say, but you may need to remove the wire(s) from one of the terminals to get an accurate reading.
How fast is it getting hot? Was it "smoking" hot? It is quite common for relays that stay energized to get hot.
On 4/5/2025 3:24 PM, M De Simone via Jukebox-list wrote:
I remember many questions about model 2900 on this forum and now I have a head scratcher, well for me anyway. I’m trying to figure out why relay RY5 located in the amplifier burns up. I have -29.5vdc across it (calls for -28v) and all the voltages around it seem to be very close as well. When I take an AC measurement across RY5 I get 15vac, not sure if that’s significant? It’s been recapped but C35 (3000@50v) is original and tests good with an esr meter. Any thoughts on what might be causing this relay to overheat? I’ve never worked in a model 2900. Thanks, Mauro
-- Tony Miklos Tony's Jukebox Repair
Jukebox-list mailing list -- jukebox-list@lists.netlojix.com To unsubscribe send an email to jukebox-list-leave@lists.netlojix.com %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s Searchable Archives: http://jukebox.markmail.org/
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Where did the replacements come from? 2900s or newer models?
In the 3300 I seem to recall there is a resistor in series with the RY-5 coil. I do not remember any in series with the coil in the 2900. So maybe if it came from another model, a resistor would be required in series with the coil?
Shankar Singh
On Apr 6, 2025, at 17:52, Tony Miklos via Jukebox-list jukebox-list@lists.netlojix.com wrote:
That's really odd. The right voltage and the right coil, I'm stumped.
On 4/6/2025 10:10 AM, M De Simone via Jukebox-list wrote:
I disconnected and measured the resistance of the coil in RY5, 39 ohms. Not sure that’s good or bad as I don’t know the original specs but it seems to pull in properly, just overheats. Sent from my iPhone
On Apr 6, 2025, at 7:17 AM, M De Simone via Jukebox-list jukebox-list@lists.netlojix.com wrote:
Yes, it actually burned up 2 coils and this was my friend’s last one from a parts chassis. He asked me to look at it as he was frustrated with it. With the amplifier powered on my bench it is very hot to touch within 2-3 minutes and it will burn up after 1 or 2 plays. I will check the resistance today and post it. Thanks,
Sent from my iPhone
On Apr 5, 2025, at 7:00 PM, Tony Miklos via Jukebox-list jukebox-list@lists.netlojix.com wrote:
It "burns up"? Do you mean it got fried and the new one is running very hot? If you check it's resistance when cold, then when it's very hot, does the resistance go down? That would indicate the windings are starting to short out. Without a schematic in front of me I can't say, but you may need to remove the wire(s) from one of the terminals to get an accurate reading.
How fast is it getting hot? Was it "smoking" hot? It is quite common for relays that stay energized to get hot.
On 4/5/2025 3:24 PM, M De Simone via Jukebox-list wrote:
I remember many questions about model 2900 on this forum and now I have a head scratcher, well for me anyway. I’m trying to figure out why relay RY5 located in the amplifier burns up. I have -29.5vdc across it (calls for -28v) and all the voltages around it seem to be very close as well. When I take an AC measurement across RY5 I get 15vac, not sure if that’s significant? It’s been recapped but C35 (3000@50v) is original and tests good with an esr meter. Any thoughts on what might be causing this relay to overheat? I’ve never worked in a model 2900. Thanks, Mauro
-- Tony Miklos Tony's Jukebox Repair
Jukebox-list mailing list -- jukebox-list@lists.netlojix.com To unsubscribe send an email to jukebox-list-leave@lists.netlojix.com %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s Searchable Archives: http://jukebox.markmail.org/
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-- Tony Miklos Tony's Jukebox Repair
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Thanks for the information, the answer may well be to add a resistor, as he is not sure exactly which chassis the replacement came from. It’s just odd that the original one burned up. I’m going to check the schematic from a 3300 and see what I need to add, and then try it out again. Thank you,
Sent from my iPhone
On Apr 6, 2025, at 10:14 PM, Shankar Singh via Jukebox-list jukebox-list@lists.netlojix.com wrote:
Where did the replacements come from? 2900s or newer models?
In the 3300 I seem to recall there is a resistor in series with the RY-5 coil. I do not remember any in series with the coil in the 2900. So maybe if it came from another model, a resistor would be required in series with the coil?
Shankar Singh
On Apr 6, 2025, at 17:52, Tony Miklos via Jukebox-list jukebox-list@lists.netlojix.com wrote:
That's really odd. The right voltage and the right coil, I'm stumped.
On 4/6/2025 10:10 AM, M De Simone via Jukebox-list wrote: I disconnected and measured the resistance of the coil in RY5, 39 ohms. Not sure that’s good or bad as I don’t know the original specs but it seems to pull in properly, just overheats. Sent from my iPhone
On Apr 6, 2025, at 7:17 AM, M De Simone via Jukebox-list jukebox-list@lists.netlojix.com wrote:
Yes, it actually burned up 2 coils and this was my friend’s last one from a parts chassis. He asked me to look at it as he was frustrated with it. With the amplifier powered on my bench it is very hot to touch within 2-3 minutes and it will burn up after 1 or 2 plays. I will check the resistance today and post it. Thanks,
Sent from my iPhone
On Apr 5, 2025, at 7:00 PM, Tony Miklos via Jukebox-list jukebox-list@lists.netlojix.com wrote:
It "burns up"? Do you mean it got fried and the new one is running very hot? If you check it's resistance when cold, then when it's very hot, does the resistance go down? That would indicate the windings are starting to short out. Without a schematic in front of me I can't say, but you may need to remove the wire(s) from one of the terminals to get an accurate reading.
How fast is it getting hot? Was it "smoking" hot? It is quite common for relays that stay energized to get hot.
On 4/5/2025 3:24 PM, M De Simone via Jukebox-list wrote:
I remember many questions about model 2900 on this forum and now I have a head scratcher, well for me anyway. I’m trying to figure out why relay RY5 located in the amplifier burns up. I have -29.5vdc across it (calls for -28v) and all the voltages around it seem to be very close as well. When I take an AC measurement across RY5 I get 15vac, not sure if that’s significant? It’s been recapped but C35 (3000@50v) is original and tests good with an esr meter. Any thoughts on what might be causing this relay to overheat? I’ve never worked in a model 2900. Thanks, Mauro
-- Tony Miklos Tony's Jukebox Repair
Jukebox-list mailing list -- jukebox-list@lists.netlojix.com To unsubscribe send an email to jukebox-list-leave@lists.netlojix.com %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s Searchable Archives: http://jukebox.markmail.org/
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-- Tony Miklos Tony's Jukebox Repair
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On 4/7/2025 12:42 PM, M De Simone via Jukebox-list wrote:
Thanks for the information, the answer may well be to add a resistor, as he is not sure exactly which chassis the replacement came from. It’s just odd that the original one burned up. I’m going to check the schematic from a 3300 and see what I need to add, and then try it out again. Thank you,
Sent from my iPhone
On Apr 6, 2025, at 10:14 PM, Shankar Singh via Jukebox-list jukebox-list@lists.netlojix.com wrote:
Where did the replacements come from? 2900s or newer models?
In the 3300 I seem to recall there is a resistor in series with the RY-5 coil. I do not remember any in series with the coil in the 2900. So maybe if it came from another model, a resistor would be required in series with the coil?
Shankar Singh
On Apr 6, 2025, at 17:52, Tony Miklos via Jukebox-list jukebox-list@lists.netlojix.com wrote:
That's really odd. The right voltage and the right coil, I'm stumped.
On 4/6/2025 10:10 AM, M De Simone via Jukebox-list wrote: I disconnected and measured the resistance of the coil in RY5, 39 ohms. Not sure that’s good or bad as I don’t know the original specs but it seems to pull in properly, just overheats. Sent from my iPhone
On Apr 6, 2025, at 7:17 AM, M De Simone via Jukebox-list jukebox-list@lists.netlojix.com wrote:
Yes, it actually burned up 2 coils and this was my friend’s last one from a parts chassis. He asked me to look at it as he was frustrated with it. With the amplifier powered on my bench it is very hot to touch within 2-3 minutes and it will burn up after 1 or 2 plays. I will check the resistance today and post it. Thanks,
Sent from my iPhone
On Apr 5, 2025, at 7:00 PM, Tony Miklos via Jukebox-list jukebox-list@lists.netlojix.com wrote:
It "burns up"? Do you mean it got fried and the new one is running very hot? If you check it's resistance when cold, then when it's very hot, does the resistance go down? That would indicate the windings are starting to short out. Without a schematic in front of me I can't say, but you may need to remove the wire(s) from one of the terminals to get an accurate reading.
How fast is it getting hot? Was it "smoking" hot? It is quite common for relays that stay energized to get hot.
> On 4/5/2025 3:24 PM, M De Simone via Jukebox-list wrote: I remember many questions about model 2900 on this forum and now I have a head scratcher, well for me anyway. I’m trying to figure out why relay RY5 located in the amplifier burns up. I have -29.5vdc across it (calls for -28v) and all the voltages around it seem to be very close as well. When I take an AC measurement across RY5 I get 15vac, not sure if that’s significant? It’s been recapped but C35 (3000@50v) is original and tests good with an esr meter. Any thoughts on what might be causing this relay to overheat? I’ve never worked in a model 2900. Thanks, Mauro
-- Tony Miklos Tony's Jukebox Repair
That is an odd one. Be sure to let us know what you do.
Just wanted to bring this thread to competition, Shankar’s suggestion was the answer! I couldn’t see a difference in the relay coil and there was no red dot on it to signify newer style coil but I placed a 50 ohm 5W resistor in front of the coil and fastened it to the chassis so it acts as a heat sink. Now the coil runs at a normal temp and resistor heats up pretty good, if left on for a while, but nothing burns up. Thanks to all the members that replied and assisted, Mauro
Sent from my iPhone
On Apr 7, 2025, at 12:42 PM, M De Simone via Jukebox-list jukebox-list@lists.netlojix.com wrote:
Thanks for the information, the answer may well be to add a resistor, as he is not sure exactly which chassis the replacement came from. It’s just odd that the original one burned up. I’m going to check the schematic from a 3300 and see what I need to add, and then try it out again. Thank you,
Sent from my iPhone
On Apr 6, 2025, at 10:14 PM, Shankar Singh via Jukebox-list jukebox-list@lists.netlojix.com wrote:
Where did the replacements come from? 2900s or newer models?
In the 3300 I seem to recall there is a resistor in series with the RY-5 coil. I do not remember any in series with the coil in the 2900. So maybe if it came from another model, a resistor would be required in series with the coil?
Shankar Singh
On Apr 6, 2025, at 17:52, Tony Miklos via Jukebox-list jukebox-list@lists.netlojix.com wrote:
That's really odd. The right voltage and the right coil, I'm stumped.
On 4/6/2025 10:10 AM, M De Simone via Jukebox-list wrote:
I disconnected and measured the resistance of the coil in RY5, 39 ohms. Not sure that’s good or bad as I don’t know the original specs but it seems to pull in properly, just overheats. Sent from my iPhone
On Apr 6, 2025, at 7:17 AM, M De Simone via Jukebox-list jukebox-list@lists.netlojix.com wrote:
Yes, it actually burned up 2 coils and this was my friend’s last one from a parts chassis. He asked me to look at it as he was frustrated with it. With the amplifier powered on my bench it is very hot to touch within 2-3 minutes and it will burn up after 1 or 2 plays. I will check the resistance today and post it. Thanks,
Sent from my iPhone
On Apr 5, 2025, at 7:00 PM, Tony Miklos via Jukebox-list jukebox-list@lists.netlojix.com wrote:
It "burns up"? Do you mean it got fried and the new one is running very hot? If you check it's resistance when cold, then when it's very hot, does the resistance go down? That would indicate the windings are starting to short out. Without a schematic in front of me I can't say, but you may need to remove the wire(s) from one of the terminals to get an accurate reading.
How fast is it getting hot? Was it "smoking" hot? It is quite common for relays that stay energized to get hot.
> On 4/5/2025 3:24 PM, M De Simone via Jukebox-list wrote: I remember many questions about model 2900 on this forum and now I have a head scratcher, well for me anyway. I’m trying to figure out why relay RY5 located in the amplifier burns up. I have -29.5vdc across it (calls for -28v) and all the voltages around it seem to be very close as well. When I take an AC measurement across RY5 I get 15vac, not sure if that’s significant? It’s been recapped but C35 (3000@50v) is original and tests good with an esr meter. Any thoughts on what might be causing this relay to overheat? I’ve never worked in a model 2900. Thanks, Mauro
-- Tony Miklos Tony's Jukebox Repair
Jukebox-list mailing list -- jukebox-list@lists.netlojix.com To unsubscribe send an email to jukebox-list-leave@lists.netlojix.com %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s Searchable Archives: http://jukebox.markmail.org/
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-- Tony Miklos Tony's Jukebox Repair
Jukebox-list mailing list -- jukebox-list@lists.netlojix.com To unsubscribe send an email to jukebox-list-leave@lists.netlojix.com %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s Searchable Archives: http://jukebox.markmail.org/ _______________________________________________ Jukebox-list mailing list -- jukebox-list@lists.netlojix.com To unsubscribe send an email to jukebox-list-leave@lists.netlojix.com %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s Searchable Archives: http://jukebox.markmail.org/
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Nothing better than a success story. Congrats on the win.
On Fri, Apr 25, 2025 at 7:01 AM M De Simone via Jukebox-list < jukebox-list@lists.netlojix.com> wrote:
Just wanted to bring this thread to competition, Shankar’s suggestion was the answer! I couldn’t see a difference in the relay coil and there was no red dot on it to signify newer style coil but I placed a 50 ohm 5W resistor in front of the coil and fastened it to the chassis so it acts as a heat sink. Now the coil runs at a normal temp and resistor heats up pretty good, if left on for a while, but nothing burns up. Thanks to all the members that replied and assisted, Mauro
Sent from my iPhone
On Apr 7, 2025, at 12:42 PM, M De Simone via Jukebox-list <
jukebox-list@lists.netlojix.com> wrote:
Thanks for the information, the answer may well be to add a resistor,
as he is not sure exactly which chassis the replacement came from. It’s just odd that the original one burned up.
I’m going to check the schematic from a 3300 and see what I need to add,
and then try it out again.
Thank you,
Sent from my iPhone
On Apr 6, 2025, at 10:14 PM, Shankar Singh via Jukebox-list <
jukebox-list@lists.netlojix.com> wrote:
Where did the replacements come from? 2900s or newer models?
In the 3300 I seem to recall there is a resistor in series with the
RY-5 coil. I do not remember any in series with the coil in the 2900. So maybe if it came from another model, a resistor would be required in series with the coil?
Shankar Singh
On Apr 6, 2025, at 17:52, Tony Miklos via Jukebox-list <
jukebox-list@lists.netlojix.com> wrote:
That's really odd. The right voltage and the right coil, I'm stumped.
On 4/6/2025 10:10 AM, M De Simone via Jukebox-list wrote:
I disconnected and measured the resistance of the coil in RY5, 39 ohms. Not sure that’s good or bad as I don’t know the original specs but it
seems to pull in properly, just overheats.
Sent from my iPhone
On Apr 6, 2025, at 7:17 AM, M De Simone via Jukebox-list <
jukebox-list@lists.netlojix.com> wrote:
Yes, it actually burned up 2 coils and this was my friend’s last one
from a parts chassis.
He asked me to look at it as he was frustrated with it. With the amplifier powered on my bench it is very hot to touch within
2-3 minutes and it will burn up after 1 or 2 plays.
I will check the resistance today and post it. Thanks,
Sent from my iPhone
On Apr 5, 2025, at 7:00 PM, Tony Miklos via Jukebox-list <
jukebox-list@lists.netlojix.com> wrote:
It "burns up"? Do you mean it got fried and the new one is running
very hot? If you check it's resistance when cold, then when it's very hot, does the resistance go down? That would indicate the windings are starting to short out. Without a schematic in front of me I can't say, but you may need to remove the wire(s) from one of the terminals to get an accurate reading.
How fast is it getting hot? Was it "smoking" hot? It is quite
common for relays that stay energized to get hot.
>> On 4/5/2025 3:24 PM, M De Simone via Jukebox-list wrote: > I remember many questions about model 2900 on this forum and now I
have a head scratcher, well for me anyway.
> I’m trying to figure out why relay RY5 located in the amplifier
burns up.
> I have -29.5vdc across it (calls for -28v) and all the voltages
around it seem to be very close as well. When I take an AC measurement across RY5 I get 15vac, not sure if that’s significant?
> It’s been recapped but C35 (3000@50v) is original and tests good
with an esr meter.
> Any thoughts on what might be causing this relay to overheat? > I’ve never worked in a model 2900. > Thanks,
> Mauro
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