HP97 The journey begins
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04-14-2021, 07:14 AM
Post: #342
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RE: HP97 The journey begins
Hi all,
I've been delayed due to work but have managed to put together the power supply, charger input and over volt circuits. So far so good. I was hoping to make a solderless changeover, but I don't think it is possible. I cannot find replacement PCB pins for the wiring connectors to the print advance switch and battery. These are easy to remove from the failed board and re-solder to the new board. The battery charge connector is not available any more either, but is easy to swap over. I obviously cannot replace the 21 connectors between the CPU board and the printer board, so these will have to be changed over also. These may be able to be replaced with home made pins and am looking into it now - but very fiddly though. I have only managed to find a 13 way instead of 12 way connector to the card reader ribbon cable. 2.54mm connector spacing seems to be old technology now with FFC cables. The new PCB can accommodate this anyway. If someone wants a replacement CPU board and cannot solder, I am happy to change the parts over if the old board is sent to me, and I will send both boards back. I am waiting on the PIC controller chips as they have not been available until now and once delivered I should be able to finish populating the board. cheers Tony |
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