DerBaum wrote on 2023-11-08, 22:39:Is it possible that you measure some connections for me?
just beep out some things. nothing fancy […]
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CharlieFoxtrot wrote on 2023-11-02, 18:36:
I have one 7193-U and it is manufacterd in 1993.
Is it possible that you measure some connections for me?
just beep out some things. nothing fancy
2023-11-08 23.14.57.jpg
1 is the Pad on the test connector
2 and 3 are the missing pads
4, 5 and 6 are vias.
I made a small chart of the measurments i need.
Screenshot 2023-11-08 233237.png
1 to 2,3,4,5,6
2 to 3,4,5,6
3 to 4,5,6
4 to 5,6
5 to 6
Thanks in advance.
I expect:
1 to 6
2 to 5
3 to 4
I can report success!
Charlie sent me over the measurments:
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Thank you very much! That was the last piece of the puzzle.
It confirms my predictions and i am now sure it wont fry anything.
I soldered wires to the points
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covered everything with white paint and connected it to my test pc...
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The Teac drive is working again!!
AND i can confirm that the missing pins are indeed needed.
To test if the pins do something i covered them up with capton tape and tested the drive again.
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Now the speed selection doesnt work anymore, it always spins at 360rpm and does not go down to 300 if , for example IMD tells it to spin slower.
And that is the feature that makes these drives great. Dual speed operation.
This confirms :
A. Pins needed
B. Repair successful
Thanks to all involved vogonians 😀