I recently picked up a Drive //c for my Apple //c, and found that it always thinks the disk is write protected. I did some research, and I see you can wire in a switch to override this. I'm not sure I want to do that at this point yet, but would like to troubleshoot a little further.
It seems like the //c drive is a bit of a hybrid of the Disk ][ and the Apple 5.25 I have for my GS. It uses a similar analog board as the Disk ][. But as I understand it, the Disk ][ used a microswitch for write protect. While this (and trhe GS 5.25) uses what appears to be an optical sensor. Based on what I saw in the instructions for adding a manual switch, the switch interrupts the orange and purple wires in the sensor circuit (the other two are brown and blue, presumably these are the power wires for the IR LED). So as a test, could I just jumper the orange and purple wires at the connector? I guess I could also verify i have power in the brown and plue wires as well. Is that LED always powered on, or only when the drive attempts to write?
Any other ideas to test/fix this, short of installing a manual switch?