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Good, then we finally agree on the same logic.
For the 445, I will keep the 9-pin connector for the remote write-in side, and use K4-4 on the 12-pin connector only as a clean STOP feedback for the ESP32.
That should keep the CPU away from the active K4-1 write-in circuit.
Thanks for the cross-check.
Regards,
Patrick
von - by
PatLen
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Alles rund um Musikboxen
Hello Jürgen,
Thank you, that makes sense now.
I agree with your explanation: the pin numbers may differ between models or drawings, but the wire colors and functions seem to match much better.
For my 445, I now understand the 9-pin receiver connector this way:
* YEL-RED / PINK-WHT = Write-In Relay path
* RED-BLK / RED-WHT = Stop Relay path
* GRY-RED / GRY = K4-1 NO / STOP feed path
von - by
PatLen
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Alles rund um Musikboxen
Hello Jürgen,
Thank you for the correction. I understand your point about trying to avoid the 12-pin connector if the 9-pin connector can provide the required write-in path and STOP feedback.
I will attach the Power Distribution & Write-In Unit schematic of my Rock-Ola 445 so you can see the exact wiring we are looking at.
On my 445, the 9-pin receiver connector is traced as follows:
von - by
PatLen
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Alles rund um Musikboxen
Hello Jürgen,
You are right to ask the question.
On my 445, according to the wiring we have traced so far, K4-1 does not seem to be available on the 9-pin receiver connector.
The 9-pin connector has the jumper functions for write-in / stop relay / accumulator reset / ground return, but K4-1 appears on the 12-pin receiver connector:
* 12-pin pin 9 = BLU-YEL = K4-1 line
* 12-pin pin 7
von - by
PatLen
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Alles rund um Musikboxen
Hello Jürgen,
The weather here is hot and stormy, 39°C. Fortunately my house is air-conditioned, so I can think quietly and clearly.
Thank you very much for your detailed analysis. Your “simplified remote write-in” approach is very interesting and it is very close to the direction we are now considering.
I bought the complete Rock-Ola 1769 Receiver Unit manual. It includes the functional
von - by
PatLen
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Alles rund um Musikboxen
Hello Albert,
Just a quick update: you can forget my previous request for the 1769 schematic.
I finally found the Rock-Ola 1769 Receiver Unit manual available for download, so I bought it and now have the complete document.
Thank you very much for your help and for the schematic you already sent earlier. It was very useful and helped us confirm that we were looking in the right direction
von - by
PatLen
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Alles rund um Musikboxen
Hello Albert,
Thank you again for the 1769 stepper schematic you already sent.
After discussing the project further, we think the most useful document for us would be the electrical wiring diagram of the 1769 stepper, especially the part showing the connector outputs going to the jukebox.
If you have it, could you please send a clear copy or high-resolution scan of the 1769 wiring diagra
von - by
PatLen
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Alles rund um Musikboxen
Thank you very much, this makes things much clearer.
You are right, I was thinking too much in terms of “keyboard emulation”, but the important point is the final code generated for the write-in selector disc.
For the Rock-Ola 445, I now understand the idea as:
* 5 segment lines for number pairs: 1/2, 3/4, 5/6, 7/8, 9/0
* 10 stop positions
* 2 lines for A/B side, inner or outer selecto
von - by
PatLen
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Alles rund um Musikboxen
Hello Jürgen,
Thank you for your explanation, it helps a lot.
I have one question about the relay approach. Maybe I misunderstood your idea.
On my Rock-Ola 445, we have 100 selections, so in a simple approach we could simulate the keyboard/selector contacts with something like 10 letter lines and 10 number lines.
But in our concept, the ESP32 wallbox interface already knows the final
von - by
PatLen
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Alles rund um Musikboxen
Hi Jurgen,
Thank you very much for your explanation and for offering to share the wallbox decoding part from your 507 MP3 Arduino project. That could be very useful for us.
Our future concept is not to reproduce the original mechanical stepper in every detail, but to build a more modern electronic system.
The idea is to use an ESP32 with a 480x480 touchscreen as the wallbox/user interfac
von - by
PatLen
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Alles rund um Musikboxen
Hi Albert,
Thank you very much, this is very helpful.
The scan is good enough to understand the general stepper/write-in architecture, but for tracing wire colors, terminal numbers and connector functions, a higher resolution version would be very useful.
If possible, please send the highest resolution scan you have.
Best regards,
Patrick
von - by
PatLen
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Alles rund um Musikboxen
Thank you for your comments.
After studying the 1765 documentation, I am starting to believe that the operating sequences are probably very similar between the different Rock-Ola receivers.
What I am now trying to understand are the actual electrical and wiring differences between:
* 1765
* 1765-2
* 1767
* 1768
* 1769
Does anyone have:
* a schematic of a 1767, 1768 or 1769 rece
von - by
PatLen
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Alles rund um Musikboxen
Hello Swen,
Thank you for your reply.
I am not actually planning to install a 1765 receiver in a Rock-Ola 445.
My goal is to understand how the Rock-Ola 17xx receivers were connected and operated, so that I can reproduce the receiver logic electronically.
I already have the complete 1765 receiver documentation and I am currently comparing it with the Rock-Ola 445 schematics.
What I
von - by
PatLen
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Alles rund um Musikboxen
Additional information:
While comparing the receiver documentation with the jukebox schematics, I found that many functions appear to be common between the receiver and the jukebox itself.
Examples include:
* Stop Relay
* Write-In Relay
* Accumulator Reset Coil
I have also identified most of the 12-pin receiver connector connections:
* AC supply from the signal transformer
* Com
von - by
PatLen
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Alles rund um Musikboxen
Hello,
I am restoring a Rock-Ola 445 jukebox and I am trying to understand the original receiver connection used with a wallbox.
I already have:
* the complete Rock-Ola 445 service manual
* the complete Rock-Ola 1765 receiver manual
* photos of adapter harnesses 2131/32 and 2145
From the documentation, it appears that the 2131/32 and 2145 are only wiring adapter harnesses.
I am l
von - by
PatLen
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Alles rund um Musikboxen
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