| Electronics > Repair |
| I need help, I got connectors with the wrong Pitch for my board. :( |
| (1/4) > >> |
| bassmothership:
Hi. Absolute beginner here (I can only solder :)). I'm learning how to replace components on a 4-track multitrack cassette recorder (from the early 90's). Its two main boards were tied with little space between each other with these connectors (in the picture) which cannot be detached (I don't know what they're called, do you know their name?). So I disassembled and desoldered all of these headers to separate the two boards and access all components. I saw someone mentioned JST-XH connectors as replacement for these machines on YT :palm: , so I bought them (Housing: XPH-#-##, Header: B#B-XH-A and Connector: SXH-001T-0.6). I did it without knowing that there's something called PITCH size. :palm: again... The JST-XH connectors I've received come in 2.5mm pitch size and my board's pitch is 1.98mm. It seems the JST-XH connector's pitch is only 2.5mm, I don't find any other size. Now, I have no clue how to know what connector is the right one for these boards. Please, help. :) |
| HwAoRrDk:
The term for connectors that are soldered to the board but are not disconnectable is "board-in" connectors. They're an ease-of-manufacturing and reliability thing; more robust and easier-to-assemble than soldering wires directly to the PCB. These look like they may be IDC (insulation displacement) "board-in" connectors, where the cables are punched in to the connector rather than having individual terminals crimped to each conductor wire and then inserted into the connector. If you want to replace them with JST-style connectors that have 2mm pitch (and it probably is 2.0mm, as 1.98 is a very odd figure) then you want JST PH-series, not XH. |
| coromonadalix:
theses if not mistaken are push in types, why did you remove all of them |O bad thinking behaviour ... and you as a newbie should have observed how they are made :palm: where they really defectives ???, this many ??? never had any problems with theses, the flex cables where or are to rigid, if you play a lot / move a lot the flex may get damaged ... |
| bassmothership:
--- Quote from: HwAoRrDk on May 31, 2024, 08:09:54 am ---The term for connectors that are soldered to the board but are not disconnectable is "board-in" connectors. They're an ease-of-manufacturing and reliability thing; more robust and easier-to-assemble than soldering wires directly to the PCB. These look like they may be IDC (insulation displacement) "board-in" connectors, where the cables are punched in to the connector rather than having individual terminals crimped to each conductor wire and then inserted into the connector. If you want to replace them with JST-style connectors that have 2mm pitch (and it probably is 2.0mm, as 1.98 is a very odd figure) then you want JST PH-series, not XH. --- End quote --- Thank you so much for clarifying. About crimping PH contacts. I've found some documentation about JST saying: "As a rule, applicable wires for crimping connector are tin-plated annealed copper stranded wire". Are the wires in my machine applicable for crimping onto? (see the photo) I've ordered this tool: https://www.iwiss.com/products/iws-2820m-mini-micro-open-barrel-crimping-tools-works-on-awg28-20-jam-molex-tyco-jst-terminals-and-connectors Will it work? |
| bassmothership:
--- Quote from: coromonadalix on May 31, 2024, 02:08:01 pm ---theses if not mistaken are push in types, why did you remove all of them |O bad thinking behaviour ... and you as a newbie should have observed how they are made :palm: where they really defectives ???, this many ??? never had any problems with theses, the flex cables where or are to rigid, if you play a lot / move a lot the flex may get damaged ... --- End quote --- Nothing defective. I've already mentioned in my post the reason I removed them: [... I disassembled and desoldered all of these headers to separate the two boards and access all components...] More specifically, I need to have access to the other side of the board where the faders and pan pots are, for obvious reasons. So these board-in connectors must go. But thanks for the warning about damaging the cables. I'll handle them carefully. |
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