Shift838 Posted February 16, 2017 Share Posted February 16, 2017 (edited) I am having difficulty find what the PCB pins are for the connector as far as what pin to the firehouse connector is. does anyone have a detail of what the 44 pins in the picture inside the red box map to firehose connector or even the 99/4a side port ?. My continuity testing is not going well, probably because of the PCB inside the firehose cable. Edited February 16, 2017 by Shift838 Quote Link to comment Share on other sites More sharing options...
Shift838 Posted February 16, 2017 Author Share Posted February 16, 2017 (edited) i think I found it or at least the schematic of the flex connector on the firehose to the 99/4A side port. HERE but I still need the what pins are what on the flex PCB connector in the picture in the original post. Edited February 16, 2017 by Shift838 1 Quote Link to comment Share on other sites More sharing options...
+helocast Posted February 16, 2017 Share Posted February 16, 2017 i think I found it. HERE Actually, you'll need to go one more schematic sheet to the right if you want to see the pin numbers of the PEB terminator signal. I worked through alternatives for replacing the fire hose. The same 44 line designations leaving the console's i/o port change after passing through the first connector of the PEB and then change again expanding to 60 at the other end. Granted, there are a lot of pins ganged for unregulated +8, -8, +16, -16, and gnd connections, so focus more on each line's designation/function rather than pin number. Good luck. Quote Link to comment Share on other sites More sharing options...
+helocast Posted February 16, 2017 Share Posted February 16, 2017 Forum was being stupid tonight with Chrome not attaching pictures, so here's a numbered picture of the P2 end (in case your card isn't marked or worn away over the years): 1 Quote Link to comment Share on other sites More sharing options...
Shift838 Posted February 16, 2017 Author Share Posted February 16, 2017 Forum was being stupid tonight with Chrome not attaching pictures, so here's a numbered picture of the P2 end (in case your card isn't marked or worn away over the years): But are these going to be a one to one connection. So will pin 1 on the P2 connector go to pin 1 on the 99/4a sideport, 2 to 2, 3 to 3, etc ? Quote Link to comment Share on other sites More sharing options...
+helocast Posted February 16, 2017 Share Posted February 16, 2017 But are these going to be a one to one connection. So will pin 1 on the P2 connector go to pin 1 on the 99/4a sideport, 2 to 2, 3 to 3, etc ? Not a 1:1 straight numerical correlation if I get what you are asking. Examples: Pin #37 of I/O actually becomes Pin #28 of the P2 or termination of the PEB flex. Pin #40 of I/O actually becomes Pin #29 of the P2 or termination of the PEB flex. Pins #1,2,13,28,41,43 of the I/O won't be connected at all since they terminate in the speech synthesizer. And of course 21,23,25, and 27 (gnd) of I/O would only get connected to Pin #3,7,9,25,27,32, OR 37 of the P2 or termination of the PEB flex. Hope I haven't confused you ;-] Quote Link to comment Share on other sites More sharing options...
Shift838 Posted February 16, 2017 Author Share Posted February 16, 2017 Not a 1:1 straight numerical correlation if I get what you are asking. Examples: Pin #37 of I/O actually becomes Pin #28 of the P2 or termination of the PEB flex. Pin #40 of I/O actually becomes Pin #29 of the P2 or termination of the PEB flex. Pins #1,2,13,28,41,43 of the I/O won't be connected at all since they terminate in the speech synthesizer. And of course 21,23,25, and 27 (gnd) of I/O would only get connected to Pin #3,7,9,25,27,32, OR 37 of the P2 or termination of the PEB flex. Hope I haven't confused you ;-] Then what I am seeing if I have not been utterly confused is a total of 35 pins will need to be connected instead of 44 ? Quote Link to comment Share on other sites More sharing options...
+helocast Posted February 16, 2017 Share Posted February 16, 2017 Then what I am seeing if I have not been utterly confused is a total of 35 pins will need to be connected instead of 44 ? I count 36 (don't forget the loner "ready" line, #12 > #40 at the bottom. Geez, it's too late and these old eyes with small font aren't helping the counting either ;-] Quote Link to comment Share on other sites More sharing options...
Shift838 Posted February 16, 2017 Author Share Posted February 16, 2017 I count 36 (don't forget the loner "ready" line, #12 > #40 at the bottom. Geez, it's too late and these old eyes with small font aren't helping the counting either ;-] Thanks for the help. I did miss counting the ready line! Quote Link to comment Share on other sites More sharing options...
+helocast Posted February 16, 2017 Share Posted February 16, 2017 I count 36 (don't forget the loner "ready" line, #12 > #40 at the bottom. Geez, it's too late and these old eyes with small font aren't helping the counting either ;-] Thanks for the help. I did miss counting the ready line! You're welcome. I forgot that in your short hop of your project you aren't including all the PEB circuitry/transceiver/resistors because of the short distance in your modded case. I agree with your 35 NOW after seeing that RDBENA.A (inverted) is driven from the PEB. Told you it was late! Quote Link to comment Share on other sites More sharing options...
Shift838 Posted February 16, 2017 Author Share Posted February 16, 2017 You're welcome. I forgot that in your short hop of your project you aren't including all the PEB circuitry/transceiver/resistors because of the short distance in your modded case. I agree with your 35 NOW after seeing that RDBENA.A (inverted) is driven from the PEB. Told you it was late! correct I noticed that line too was driven from the PEB. I believe I got it all down so I can start putting my card together tomorrow. Attached is what I mapped so it's easy for me to read and refer to. I have made my own connector for the flex card to mount on the PCB with some standard headers. I was able to pull every other header out of the plastic housing and it fits perfect. I will use some standard dupont header cables to get it working. Stuart suggested to hook up a couple of wires at a time and power up the system. If the 99/4A freezes then I have a wire wrong and it will be easier to identify by using a couple at a time. 2 Quote Link to comment Share on other sites More sharing options...
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