Stormtrooper of Death Posted November 4, 2016 Share Posted November 4, 2016 I and a friend are at this moment trying to solder a write protect switch. But we dont have any information about the meaning of the 4 pins of the J11 in the 1050. I tried Sams Computerfacts, but that pdf manual doesnt contain the exact meaning / info about each of the 4 pins. Any help would be welcome. Quote Link to comment Share on other sites More sharing options...
+tf_hh Posted November 4, 2016 Share Posted November 4, 2016 Hi, the pins 1 and 2 of that connector are only constant power for a IR LED used for the light barrier. Pin 2 is ground. Pin 3 and 4 (4 is also ground) is the photo detection sensor. The output is stabilized by using an NOR-gate from U11. The simplest way: Solder a switch (with 3 terminals & 2 positions) to J11. The middle terminal of that switch connected to pin 3, the other terminals to pin 1 and 2. This way will change the pin 3 voltages level between high (+5 volts) and low (ground). In one way all writes are allowed, in the other not. And it´s reversible, no damage to the drive mechanic needed. Jurgen 2 Quote Link to comment Share on other sites More sharing options...
Stormtrooper of Death Posted November 5, 2016 Author Share Posted November 5, 2016 Thanks for the fast info. Our solder job of a new writeprotect switch was a succes yesterday. Quote Link to comment Share on other sites More sharing options...
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