Post by nearbeer2001 on Apr 17, 2021 15:39:50 GMT
Thank you for taking the time to view my post.
I have a 1969 or 1970 Wurlitzter Statesman that I picked up back in September. The seller stated that when plugged in he heard a loud humming noise through the speakers; he bought it from a friend who had it in a storage unit since the mid-80’s.
I do not have a background in electronics or electrical based mechanisms but I am willing to learn; I don’t know how to trouble shoot circuits to determine if they are passing the correct voltage/amperage to the follow on circuit.
I took the power supply to an electronics repair shop who specialized in repairing obsolete electronics for industry and they gave it the once over and replaced some capacitors.
I hooked everything back up and put a few quarters through the coin mechanism and nothing happened. I opened up the top and noticed that the turntable was spinning at a slow speed but left well enough alone for the day and turned the jukebox off.
A few days later I was poking around and noticed next to the record carousel there is a three-position lever and another lever labeled “OFF/ON.” I moved the first lever all the way to the right (“Run” position) and the second lever to “On.” Immediately a record was placed on the platter and started playing although I could tell right away that the speed was off.
i.imgur.com/BOwKqyi.mp4
<a href="https://imgur.com/BOwKqyi"><img src="https://i.imgur.com/BOwKqyi.mp4" title="source: imgur.com" /></a>
Once the record completed playing, the stylus arm did not retract; I suspect that the microswitch that the arm comes into contact with at the end of the record is bad. Here is a video of the record not stopping play:
i.imgur.com/0jRbKNd.mp4
<a href="https://imgur.com/0jRbKNd"><img src="https://i.imgur.com/0jRbKNd.mp4" title="source: imgur.com" /></a>
I left the jukebox alone for a few more weeks while I waited for a service manual to arrive. Once the manual arrived, I read through it to see if there is a way to conduct a general reset of the jukebox but could not determine how to do so.
After looking at the diagrams of the coin mechanism, I manually pressed some of the contactors that are moved whenever a coin is inserted and could tell that they were making good contact; I saw a brief spark of electricity whenever the contacts closed.
However, when I attempted to make a selection using the buttons like you normally would, nothing happened.
Here is what works:
• The carousel spins
• The arm that puts the record onto the platter works
• The motor that spins the platter works
• The amplifier and power supply seem okay
• Coins pass through the coin mechanism okay but I have not taken the time to see if a coin trips the little contacts at the bottom of the mechanism.
Tools I have: Fluke digital multimeter; Tektronix vintage oscilloscope
Documents I have: Original wiring diagrams, copy of the parts and service manual
Any suggestions on what component of the jukebox to troubleshoot first? I thought about starting at the coin mechanism to see if there is continuity in the circuit but I am open to suggestions. How do I go about checking the circuits?
I have a 1969 or 1970 Wurlitzter Statesman that I picked up back in September. The seller stated that when plugged in he heard a loud humming noise through the speakers; he bought it from a friend who had it in a storage unit since the mid-80’s.
I do not have a background in electronics or electrical based mechanisms but I am willing to learn; I don’t know how to trouble shoot circuits to determine if they are passing the correct voltage/amperage to the follow on circuit.
I took the power supply to an electronics repair shop who specialized in repairing obsolete electronics for industry and they gave it the once over and replaced some capacitors.
I hooked everything back up and put a few quarters through the coin mechanism and nothing happened. I opened up the top and noticed that the turntable was spinning at a slow speed but left well enough alone for the day and turned the jukebox off.
A few days later I was poking around and noticed next to the record carousel there is a three-position lever and another lever labeled “OFF/ON.” I moved the first lever all the way to the right (“Run” position) and the second lever to “On.” Immediately a record was placed on the platter and started playing although I could tell right away that the speed was off.
i.imgur.com/BOwKqyi.mp4
<a href="https://imgur.com/BOwKqyi"><img src="https://i.imgur.com/BOwKqyi.mp4" title="source: imgur.com" /></a>
Once the record completed playing, the stylus arm did not retract; I suspect that the microswitch that the arm comes into contact with at the end of the record is bad. Here is a video of the record not stopping play:
i.imgur.com/0jRbKNd.mp4
<a href="https://imgur.com/0jRbKNd"><img src="https://i.imgur.com/0jRbKNd.mp4" title="source: imgur.com" /></a>
I left the jukebox alone for a few more weeks while I waited for a service manual to arrive. Once the manual arrived, I read through it to see if there is a way to conduct a general reset of the jukebox but could not determine how to do so.
After looking at the diagrams of the coin mechanism, I manually pressed some of the contactors that are moved whenever a coin is inserted and could tell that they were making good contact; I saw a brief spark of electricity whenever the contacts closed.
However, when I attempted to make a selection using the buttons like you normally would, nothing happened.
Here is what works:
• The carousel spins
• The arm that puts the record onto the platter works
• The motor that spins the platter works
• The amplifier and power supply seem okay
• Coins pass through the coin mechanism okay but I have not taken the time to see if a coin trips the little contacts at the bottom of the mechanism.
Tools I have: Fluke digital multimeter; Tektronix vintage oscilloscope
Documents I have: Original wiring diagrams, copy of the parts and service manual
Any suggestions on what component of the jukebox to troubleshoot first? I thought about starting at the coin mechanism to see if there is continuity in the circuit but I am open to suggestions. How do I go about checking the circuits?
