Tk-730 display flashes
Moderator: willbartlett
-
Stan Wright
- Posts: 7
- Joined: Sun Oct 23, 2005 11:49 am
- Location: Bedford, IN
Tk-730 display flashes
I have a TK-730 that flashes on three of 30 programmed channels. The channels that flash are well within the advertised frequency range. I even read the frequencies back to verify them. Any ideas?
I've seen the display flash and give the error tone under the following 3 conditions:
-The RX synthesizer is out of lock. Are the 3 channels all at one end of the band or the other? Even if the frequencies are within range of the advertised frequency span, the VCO might be out of adjustment and may not be locking at one edge of the band or the other. Does the radio give an error on RX or TX? (or both?) If the three lowest frequency channels or the three highest frequency channels are giving errors, it's a pretty good sign that you have a synthesizer problem.
-The radio personality is referencing a dual-radio setup and the second radio is not present or not powered up.
-The radio personality is corrupted. This doesn't happen often, but I've seen it happen. IIf you have the FPU software, save the old personality and then write a new test personality with the three problem frequencies only and see if you get the same result. Sometimes the information stored in the control head gets corrupted and doesn't match the information in the radio EEPROM or vice versa.
There could also be some kind of odd mismatch..say...a 16K EEPROM in the radio and a 4K EEPROM in the head. The radio could have the wrong firmware (single head radios should have FAA firmware). If the radio personality was written for a G-series radio and is flagged as narrow band, and then you put the personality in a non-G radio which does not have narrow band hardware, you could get that error also.
-The RX synthesizer is out of lock. Are the 3 channels all at one end of the band or the other? Even if the frequencies are within range of the advertised frequency span, the VCO might be out of adjustment and may not be locking at one edge of the band or the other. Does the radio give an error on RX or TX? (or both?) If the three lowest frequency channels or the three highest frequency channels are giving errors, it's a pretty good sign that you have a synthesizer problem.
-The radio personality is referencing a dual-radio setup and the second radio is not present or not powered up.
-The radio personality is corrupted. This doesn't happen often, but I've seen it happen. IIf you have the FPU software, save the old personality and then write a new test personality with the three problem frequencies only and see if you get the same result. Sometimes the information stored in the control head gets corrupted and doesn't match the information in the radio EEPROM or vice versa.
There could also be some kind of odd mismatch..say...a 16K EEPROM in the radio and a 4K EEPROM in the head. The radio could have the wrong firmware (single head radios should have FAA firmware). If the radio personality was written for a G-series radio and is flagged as narrow band, and then you put the personality in a non-G radio which does not have narrow band hardware, you could get that error also.
-
Stan Wright
- Posts: 7
- Joined: Sun Oct 23, 2005 11:49 am
- Location: Bedford, IN
-
luckydog465
- Posts: 2
- Joined: Fri Oct 20, 2006 7:02 pm
Re: Tk-730 display flashes
Try looking at the eprom it is almost always the problem.Stan Wright wrote:I have a TK-730 that flashes on three of 30 programmed channels. The channels that flash are well within the advertised frequency range. I even read the frequencies back to verify them. Any ideas?