Need A1200 Keyboard connector to keyboard matrix pinout

Stardust · 27 June 2022, 02:47

I was doing a recap on my A1200 mainboard and though I tried to be careful and used two layers of Kapton tape around the capacitor that is behind the keyboard connector. I may have damaged the keyboard connector. Or maybe the flimsy keyboard membrane is faulty.

The A1200 mainboard schematic has the keyboard connector but I don't know how the A500\A1200 keyboard matrix connects to the 31 pin A1200 keyboard connector. I need a schematic for that so I can test the one matrix line X7 that is not working.

In the meantime I have ordered a new A1200 hard pcb keyboard membrane.

Stardust · 27 June 2022, 05:07

I found a guide at http://sg.aminet.net/docs/hard/A1200KbdMtx.txt The X7 matrix line works if I use a jumper wire between pin 4 and some others on the underside of the mainboard where the keyboard connector is soldered.

27 June 2022, 02:47	#1
Stardust Registered User Join Date: Jun 2010 Location: UK Posts: 72	Need A1200 Keyboard connector to keyboard matrix pinout I was doing a recap on my A1200 mainboard and though I tried to be careful and used two layers of Kapton tape around the capacitor that is behind the keyboard connector. I may have damaged the keyboard connector. Or maybe the flimsy keyboard membrane is faulty. The A1200 mainboard schematic has the keyboard connector but I don't know how the A500\A1200 keyboard matrix connects to the 31 pin A1200 keyboard connector. I need a schematic for that so I can test the one matrix line X7 that is not working. In the meantime I have ordered a new A1200 hard pcb keyboard membrane.

27 June 2022, 05:07	#2
Stardust Registered User Join Date: Jun 2010 Location: UK Posts: 72	I found a guide at http://sg.aminet.net/docs/hard/A1200KbdMtx.txt The X7 matrix line works if I use a jumper wire between pin 4 and some others on the underside of the mainboard where the keyboard connector is soldered. Last edited by Stardust; 27 June 2022 at 05:19.

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