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Problem keyload to my radio (P7100)

nucleaireqc

Member
Joined
Dec 8, 2013
Messages
105
Hello.
I have a problem. I have a USB programming cable (TTL) and I made the modification for the 2210 ohm resistor. When uploading the key I get on the screen, Keyload Loading. And I receive an error message.
My programming cable is the one that works for an LPE-200 this cable is equipped with TX and RX it does not have CTS and RTS do these cause the problem?

Tanks
 

nucleaireqc

Member
Joined
Dec 8, 2013
Messages
105
After watching I made a new cable. It allows me to program and load encryption keys. Problems resolved
 

rescue161

KE4FHH
Database Admin
Joined
Jun 5, 2002
Messages
3,026
Location
Hubert, NC
To which pins did you add the resistor? I have an older Price Industries LPE/Prism/Jaguar cable that I use to program P7100/P7200 radios and it will not keyload the P7100. It does keyload the P7200 radios just fine.
 

nucleaireqc

Member
Joined
Dec 8, 2013
Messages
105
Nice work and nice finish. I redid my cable but I applied the resistance at all times. I can program and load keys. (the programming mode procedure is required) when the radio jump program the keyload mode is displayed later (can be avoided) by removing the cable when indicated (initializes the data)
 

rescue161

KE4FHH
Database Admin
Joined
Jun 5, 2002
Messages
3,026
Location
Hubert, NC
Mine initially stayed on KEYLOAD IDLE, but after I started the load, it started cycling back and forth. I thought I may have shorted a pin, so I took it back apart. It's still flashing KEYLOAD IDLE and back to normal when I have it in keyload mode, but it works. I just added two resistors (2 - 4.42k in parallel) across pins E8 & E10. Then I added the switch to those same pins. When the switch is open, the 2.21k is felt across those pins; when the switch is closed, it shorts the pins together. I'm happy with the result and even happier that I finally got the P7100 to play nice. I thought it was firmware related and had given up, so thank you again.

Edit: Even though I calculated the two resistors in parallel and they should be 2.21k, they are actually reading a little high at 2.220k. It still works though, so I'm alright with that.
 
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