Electronics > Repair
I need help, I got connectors with the wrong Pitch for my board. :(
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tooki:

--- Quote from: bassmothership on June 02, 2024, 02:49:49 pm --- I just want to create means to disconnect and separate these two boards so the idea of replacing these board-in headers with the JST'S.

About harnesses, I looked it up and it seems quite confusing to know what I should look for. I don't have the schematics of my machine. What should I use as reference? How can I even buy them? I'm so clueless about this that I don't even know what the questions I should ask.

--- End quote ---
I truly do not mean this as an insult, but if you don’t understand the pinout of a simple ribbon cable, what on earth are you even doing inside this machine? If that is indeed your current skill level, I can’t envision any outcome other than disaster.

What is your goal in opening this machine, and in wanting to make it easy to separate the boards?


--- Quote from: pcprogrammer on June 02, 2024, 03:39:44 pm ---Keep in mind that JST either XH or PH might have limited mating cycles.

--- End quote ---
Well if they put male headers on both boards, then it’s just the cable that might need to be replaced eventually. No big deal.
bassmothership:

--- Quote from: tooki on June 02, 2024, 03:51:01 pm ---
--- Quote from: bassmothership on June 02, 2024, 02:49:49 pm --- I just want to create means to disconnect and separate these two boards so the idea of replacing these board-in headers with the JST'S.

About harnesses, I looked it up and it seems quite confusing to know what I should look for. I don't have the schematics of my machine. What should I use as reference? How can I even buy them? I'm so clueless about this that I don't even know what the questions I should ask.

--- End quote ---
I truly do not mean this as an insult, but if you don’t understand the pinout of a simple ribbon cable, what on earth are you even doing inside this machine? If that is indeed your current skill level, I can’t envision any outcome other than disaster.

What is your goal in opening this machine, and in wanting to make it easy to separate the boards?
--- End quote ---

No insult done at all.  :)
Fair question. The reason for opening is that this machine was left in a warehouse for years without any cover. The front panel with the faders, pan pots and tape deck was covered with dust. The ribbon cables attaching the top and bottom boards are a bit too short for me to work, so I had to remove these darn connectors to be able to get the front board and clean the dust out.
Well, since this is an old machine which isn't made anymore, I'll need to learn how to service it, replacing defective parts, etc, anyway. So here I am.

I've forgot to mention... I have more four older machines, much bigger and complex than this small one. So I want to get ready for when things start to break down.

And this is the first time I've heard the word "pinout". Looking it up now. Thanks for that.


--- Quote from: tooki on June 02, 2024, 03:51:01 pm ---
--- Quote from: pcprogrammer on June 02, 2024, 03:39:44 pm ---Keep in mind that JST either XH or PH might have limited mating cycles.

--- End quote ---
Well if they put male headers on both boards, then it’s just the cable that might need to be replaced eventually. No big deal.

--- End quote ---

I've took note on that. Thanks for the pro-tip!
bassmothership:

--- Quote from: pcprogrammer on June 02, 2024, 03:39:44 pm ---Keep in mind that JST either XH or PH might have limited mating cycles.
--- End quote ---

Mating cycles. I have no idea what that is, I'm looking it up. Lots of things for me to learn here.


--- Quote from: pcprogrammer on June 02, 2024, 03:39:44 pm ---There is such a connector in the 1013D for the power connection and during reverse engineering I disconnected it so often that it now has a crappy connection. Especially when you obtain the crimp terminals from cheaper sources.
--- End quote ---

I think here in Japan the sources are supposed to be good quality, I guess...

pcprogrammer:

--- Quote from: bassmothership on June 02, 2024, 04:58:36 pm ---
--- Quote from: pcprogrammer on June 02, 2024, 03:39:44 pm ---Keep in mind that JST either XH or PH might have limited mating cycles.

--- End quote ---

Mating cycles. I have no idea what that is, I'm looking it up. Lots of things for me to learn here.

--- End quote ---

The number of times you can connect, disconnect and reconnect again, before the connection starts to degrade due to wear, loss of retention force or corrosion due to protective layer down grading.


--- Quote from: bassmothership on June 02, 2024, 04:58:36 pm ---
--- Quote from: pcprogrammer on June 02, 2024, 03:39:44 pm ---There is such a connector in the 1013D for the power connection and during reverse engineering I disconnected it so often that it now has a crappy connection. Especially when you obtain the crimp terminals from cheaper sources.

--- End quote ---

I think here in Japan the sources are supposed to be good quality, I guess...

--- End quote ---

Depends on the manufacturer. When imported from China it can be different.
bassmothership:

--- Quote from: pcprogrammer on June 02, 2024, 06:23:17 pm ---
--- Quote from: bassmothership on June 02, 2024, 04:58:36 pm ---
--- Quote from: pcprogrammer on June 02, 2024, 03:39:44 pm ---Keep in mind that JST either XH or PH might have limited mating cycles.

--- End quote ---

Mating cycles. I have no idea what that is, I'm looking it up. Lots of things for me to learn here.

--- End quote ---

The number of times you can connect, disconnect and reconnect again, before the connection starts to degrade due to wear, loss of retention force or corrosion due to protective layer down grading.
--- End quote ---

Thank you very much for explaining. 
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