Why does the tx light flash on my ftdx5000?

hi
Yes, if the tx/rx LED light flashing at the same time, i recommend bring it to the radio shop,
thanks!!!

regards,
jack

tx is the word for transmit and rx is for receive
if you press the talk button, the unit goes into transmit mode and is received in the receiver of the other unit/s
now that your statement has been clarified what was the question?

On most models this would indicate activity on your frequency. The fact your radio is not receiving (Rx) could be because the transmitting (Tx) radio is just beyond your range; your radio has a different PL code than the Tx radio, or your radio has a problem.

Likely a bad battery. Radios take more power to transmit than receive.

Check output transistors for short, change emitter resistors

Error codes for iR2016i,2020i for other machines codes you need to get the specific manual, these manuals can be downloaded from Ebay, look for user ID ultimate_sacrifice A seller on Ebay.
No. Tx/Rx Description
##0100 [Tx] at time of transmission, the procedural signal has been transmitted more than
specified.
##0101 [Tx/Rx] the modem speed does not match that of the other party.
##0102 [Tx] at time of transmission, fall-back cannot be used.
##0103 [Rx] at time of reception, EOL cannot be detected for 5 sec (15 sec if CBT).
##0104 [Tx] at time of transmission, RTN or PIN is received.
##0106 [Rx] at time of reception, the procedural signal is received for 6 sec while in wait for the
signal.
##0107 [Rx] at time of reception, the transmitting party cannot use fall-back.
##0109 [Tx] at time of transmission, a signal other than DIS, DTC, FTT, CFR, or CRP is
received, and the procedural signal has been sent more than specified.
##0111 [Tx/Rx] memory error has occurred.
##0114 [Rx] at time of reception, RTN is transmitted.
##0200 [Rx] at time of reception, no image carrier is detected for 5 sec.
##0201 [Tx/Rx] DCN is received outside the normal parity procedure.
##0220 [Tx/Rx] system error (main program out of control) has occurred.
##0232 [Tx] encoding error has occurred.
##0237 [Rx] decoding error has occurred.
##0261 [Tx/Rx] system error has occurred.
##0280 [Tx] at time of transmission, the procedural signal has been transmitted more than
specified.
##0281 [Tx] at time of transmission, the procedural signal has been transmitted more than
specified.
##0282 [Tx] at time of transmission, the procedural signal has been transmitted more than
specified.
##0283 [Tx] at time of transmission, the procedural signal has been transmitted more than
specified.
##0284 [Tx] at time of transmission, DCN is received after transmission of TCF.
##0285 [Tx] at time of transmission, DCN is received after transmission of EOP.
##0286 [Tx] at time of transmission, DCN is received after transmission of EOM.
##0287 [Tx] at time of transmission DCN is received after transmission of MPS.
##0288 [Tx] after transmission of EOP, a signal other than PIN, PIP, MCF, RTP, or RTN has
been received.
##0289 [Tx] after transmission of EOM, a signal other than PIN, PIP, MCF, RTP, or RTN has
been received.
##0290 [Tx] after transmission of MPS, a signal other than PIN, PIP, MCF, RTP, or RTN has
been received.
##0670 [Tx] at time of V.8 late start, the V.8 ability of DIS front the receiving party is expected
to be detected, and the CI signal is expected to be transmitted in response; however,
the procedure fails to advance, and the line is released because of T1 time-out.
##0671 [Rx] at time of V.8 arrival, procedure fails to move to phase 2 after detection of CM
signal from caller, causing T1 time-out and releasing line
##0672 [Tx] at time of V.34 transmission, a shift in procedure from phase 2 to phase 3 and
thereafter stops, causing the machine to release the line and suffer T1 timeout.

There are buttons on the transmitter/receiver and the mouse(small red on bottom). Turn off the mouse. Plug in the USB Tx/Rx and hold down the button. Then press the red button on the mouse and hold for one second. Do this until the rapidly flashing light on the Tx/Rx slows down. The unit's frequencies are then encoded/decode and can communicate.

sounds like a bad pll.that will have to go to a shop that knows what they're doing.good luck

Ok this problem is caused by the spring mic jack
Getting rusty

Had it ever worked, or are you setting it up for the first time?
Have you ASSIGNED the digital input in the menu?