MrDrProfessorJacob
Member
- Joined
- Aug 20, 2022
- Messages
- 5
Hi all,
Longtime reader, first time poster. I recently acquired a TK-890 w/ a KRK7DB, a KCH11 remote head, and it is configured for ignition sense. Despite the dual band set up, I was able to have it reprogrammed to run as a single band unit and I acquired it from another working environment, so it didn't sit for very long before landing in my grubby little mitts. While installing in my vehicle, I've run into a major issue that I keep hitting dead ends with. At first, when I powered the unit on (using the ignition sense) the display head would light up normally but after leaving the title screen, the external speaker would begin to beep continuously and would only pause for a split second when I changed channels. The display head would appear as it would for any other working unit and there appeared to be no issue with its functionality (cycle through all the channel banks, adjust volume, etc). Additionally, the unit won't transmit or receive on any frequency. I started with the generic first step to any technical problem and powered the unit off and back on again. After doing that a few times I noticed that every 4th or 5th power cycle, the beep would stop and when I pressed PTT the red indicator light would come on but it still won't transmit or receive (this function could not be performed when the unit was beeping). And when I cycled the power again it would go right back to the continuous beep. I double checked the programming (found no issues and had it checked by two different computers), the power/antenna cables, and ensured all the grounding points were solid connections. Thinking maybe there was an issue with the connector pins for the remote head cable, I unplugged that and plugged it back in (on both ends). Now, the display head won't even power on and the continuous beep has ceased but when I press on the power button I'm able to hear the "static pop" from the external speaker, so I assume it's still receiving power to some degree. At this point, I'm thinking its an issue with the remote head cable (which I've already ordered another) but I'm hoping to get some input from the "professionals" out there just in case that fails, too.
For background context, the chassis is located in the rear of the truck with the wires and remote head run up to the front. The power is connected straight to the truck's battery with the ground cable connected to a grounding point that is shared by the truck's emergency lighting. The IGN wire is wired directly to the same relay that the vehicle's AM/FM radio sits on and the antenna is located on the driver's side of the hood with the vehicle's low band antenna, opposite the AM/FM antenna (the truck is running a completely separate low band radio, TK6110). AND I ensured that I had the correct antenna for the frequency range, 450-470 mHz and that's running off an RG8 coax cable.
Now that I've given you my life story, any suggestions y'all have for troubleshooting this thing would be greatly appreciated.
Longtime reader, first time poster. I recently acquired a TK-890 w/ a KRK7DB, a KCH11 remote head, and it is configured for ignition sense. Despite the dual band set up, I was able to have it reprogrammed to run as a single band unit and I acquired it from another working environment, so it didn't sit for very long before landing in my grubby little mitts. While installing in my vehicle, I've run into a major issue that I keep hitting dead ends with. At first, when I powered the unit on (using the ignition sense) the display head would light up normally but after leaving the title screen, the external speaker would begin to beep continuously and would only pause for a split second when I changed channels. The display head would appear as it would for any other working unit and there appeared to be no issue with its functionality (cycle through all the channel banks, adjust volume, etc). Additionally, the unit won't transmit or receive on any frequency. I started with the generic first step to any technical problem and powered the unit off and back on again. After doing that a few times I noticed that every 4th or 5th power cycle, the beep would stop and when I pressed PTT the red indicator light would come on but it still won't transmit or receive (this function could not be performed when the unit was beeping). And when I cycled the power again it would go right back to the continuous beep. I double checked the programming (found no issues and had it checked by two different computers), the power/antenna cables, and ensured all the grounding points were solid connections. Thinking maybe there was an issue with the connector pins for the remote head cable, I unplugged that and plugged it back in (on both ends). Now, the display head won't even power on and the continuous beep has ceased but when I press on the power button I'm able to hear the "static pop" from the external speaker, so I assume it's still receiving power to some degree. At this point, I'm thinking its an issue with the remote head cable (which I've already ordered another) but I'm hoping to get some input from the "professionals" out there just in case that fails, too.
For background context, the chassis is located in the rear of the truck with the wires and remote head run up to the front. The power is connected straight to the truck's battery with the ground cable connected to a grounding point that is shared by the truck's emergency lighting. The IGN wire is wired directly to the same relay that the vehicle's AM/FM radio sits on and the antenna is located on the driver's side of the hood with the vehicle's low band antenna, opposite the AM/FM antenna (the truck is running a completely separate low band radio, TK6110). AND I ensured that I had the correct antenna for the frequency range, 450-470 mHz and that's running off an RG8 coax cable.
Now that I've given you my life story, any suggestions y'all have for troubleshooting this thing would be greatly appreciated.
