How to Extend an RS232 Cable
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Bronze Member Username: Flu_guyPost Number: 35 Registered: Aug-07 | Dear All What with the bins changing so much these days, I decided today to make an extension for my RS232 uploading cable. Now I can leave the FLU where it is, under the TV, and program it without disconnecting anything. All you need are a couple of 9pin D connectors, 1 male and one female and some 4 conductor phone wire, (the solid core stuff, sometimes called "Quad"). I made mine about 25 feet, but longer would probably still work. You only need 3 conductors, just interconnect pins 2, 3 & 5, and leave the spare wire open. Use it to extend your existing cable, (doesn't matter which type), and plug the far end into the STB, now do your upload in the usual way. I used this with my FLU tonight, and it worked perfectly, it was so much easier I cannot think why I didn't do this before! All the best Htiek |
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Bronze Member Username: NcxPost Number: 66 Registered: Dec-07 | Good thinking  |
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Gold Member Username: NydasPost Number: 7026 Registered: Jun-06 | You can also buy an extension cord DB9 M/F straight RS232 of length of your choice. |
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Bronze Member Username: The_codersPost Number: 34 Registered: Jan-08 | the 4th wire you didn't connect should be used for the case ground (metal oval ring around pins) |
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Bronze Member Username: Flu_guyPost Number: 36 Registered: Aug-07 | The Coders: Good point, but I don't think it usually matters... htiek |
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Gold Member Username: NydasPost Number: 7047 Registered: Jun-06 | Could one of you guys help with non-functioning serial port? Thanks. https://www.ecoustics.com/electronics/forum/home-video/433385.html |
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Silver Member Username: KirankumarKenya Post Number: 821 Registered: Oct-07 | htiek, you said you had 1 male and 1 female connector,i thought we need both to be the same , i might be wrong |
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Gold Member Username: NydasPost Number: 7052 Registered: Jun-06 | He made an "make an extension for my RS232" An extension cord is always M/F. |
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Silver Member Username: KirankumarKenya Post Number: 823 Registered: Oct-07 | oh ok that makes sense.thanks |
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Bronze Member Username: Free_tverPost Number: 22 Registered: Jan-08 | anyone have any ideas for a non-functional serial port on my 2700a??? |
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Silver Member Username: ScabzKnoxville, Tn Us Post Number: 289 Registered: Oct-07 | I used a usb extension that Ive had for about 4 years now. |
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Bronze Member Username: Flu_guyPost Number: 37 Registered: Aug-07 | Free TVer: Tell me more ... How do you know that it is the 2700A that is faulty? Htiek |
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Bronze Member Username: Flu_guyPost Number: 38 Registered: Aug-07 | African: The nice thing about making an extension is that it will work with any kind of RS232 connection, be it Null-Modem or Straight-Through. You can even chain them together, if one isn't long enough. htiek |
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Silver Member Username: KirankumarKenya Post Number: 840 Registered: Oct-07 | Thanks, i need one |
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Bronze Member Username: Free_tverPost Number: 24 Registered: Jan-08 | i have two other boxes that will update the bin just fine. this box will not respond to any command via the serial port, wether its with another pansat or my computer. |
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Bronze Member Username: Flu_guyPost Number: 39 Registered: Aug-07 | FREE TVer: Hmm ... Presumably the 2700A is alive in all other respects and the other boxes are the same type, (not a wrong cable type issue)? htiek |
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Bronze Member Username: Free_tverPost Number: 25 Registered: Jan-08 | yes cable is good and the one stb that i am refering to works in all other aspects that one would expect of a pansat 2700 except for the serial port to load the bin. |
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Bronze Member Username: Flu_guyPost Number: 40 Registered: Aug-07 | FREE TVer: Okay Check the RS232 connector for busted or bent pins. Take the box apart and check that the connector is properly soldered to the PCB and that there are no dry joints or cracked tracks. Buzz out the connections with an ohmmeter if you have one. There should be tracks from pins 2, 3 which probably go to some resistors and then on to the RS232 tranceiver IC, check these circuits with the ohmmeter too. Look closely for other signs of damage or chips that are abnormally hot, (compare with other box). If you cannot see anything obvious, then perhaps the tranceiver IC is fried. htiek |
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Bronze Member Username: Flu_guyPost Number: 41 Registered: Aug-07 | FREE TVer: Okay Check the RS232 connector for busted or bent pins. Take the box apart and check that the connector is properly soldered to the PCB and that there are no dry joints or cracked tracks. Buzz out the connections with an ohmmeter if you have one. There should be tracks from pins 2, 3 which probably go to some resistors and then on to the RS232 tranceiver IC, check these circuits with the ohmmeter too. Look closely for other signs of damage or chips that are abnormally hot, (compare with other box). If you cannot see anything obvious, then perhaps the tranceiver IC is fried. htiek |
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Bronze Member Username: Flu_guyPost Number: 42 Registered: Aug-07 | FREE TVer: I had another thought, it's a long shot but I have been caught by it before. If the ground conductor in the cable is open, (pin 5) it may still work in certain circumstances, (if both boxes are grounded via the AC cord and the digital grounds are internally connected to the chassis), so check the cable out any way. Pins 2,3 and 5 should be connected, end to end. htiek |
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Bronze Member Username: Flu_guyPost Number: 43 Registered: Aug-07 | Sorry, I posted twice by accident. htiek |
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