Kenwood TH-D74A User Manual page 125

Problem
Received signals are not properly
demodulated.
The display darkens.
Difficult for the built-in GPS receiver
to receive signals depending on the
frequency of the transceiver.
The battery icon does not show that
it is being charged. When charging
during power OFF, nothing is
displayed on the screen.
Unable to connect to Bluetooth
device.
Bluetooth device is not found after
searching
Unable to communicate via
virtual COM port even though the
transceiver is connected to a PC via a
USB cable.
No sound from the PC even though
the transceiver is connected to a PC
via a USB cable.
The transceiver is not displayed as
a removable disk even though it is
connected to a PC via a USB cable.
Data saved on the microSD memory
card cannot be read.
The voice of receiving party is cut off
or distorted during transmission in
DV/ DR mode.
QSO is possible with Stand Alone in
DV/ DR mode but not possible with
Over the Gateway or specific stations.
Packet loss icon < > lights
up and voice is cut off during
transmission in DV/ DR mode.
FM display is blinking in DV mode.
No message is returned from the
repeater after transmission in DR
mode (S-meter also does not move).
The broadcast impossible icon
appears after transmission in DR
mode (Voice guidance indicates
error).
Unable to connect to reflector in DR
mode.
Unable to transmit using PTT in DV/
DR mode.
Transmission does not end
immediately even after [PTT] is
released in DV/ DR mode.
Probable Cause
Wrong settings for signal format
(Demodulation mode).
When receiving sound is distorted in
AM/SSB/CW, the receiving signal is too
strong.
The temperature of the transceiver is
rising.
The local circuit of the transceiver is
affecting the GPS sensitivity.
The transceiver is being charged at the
charging station.
The transceiver is not paired with the
Bluetooth device (headset etc.).
The Bluetooth device (headset etc.) is not
ready.
The USB selection setting is set to "Mass
Storage".
The USB selection setting is set to "Mass
Storage".
The USB selection setting is set to
"COM+AF/IF Output".
Data format is not supported.
Bad propagation.
The Callsign of own station is not
registered in the D-STAR management
server.
Gateway is not functioning.
・The transceiver is receiving packet loss,
indicating loss of partial data during
communication via Internet network.
The transceiver is receiving signals in FM
mode.
The access repeater selection is
incorrect.
The manually entered repeater frequency
is incorrect (or shift setting is incorrect).
Outside the repeater area (or signals are
not reaching the repeater).
The destination repeater cannot be
reached, or it is in use.
The destination repeater Callsign is
incorrect.
The access repeater does not support
reflector.
The transceiver is in data communication
mode.
"GPS Info. in Frame" is set to On.
27-3
Corrective Action
Try changing to other modes.
Set the ATT function to ON.
Turn OFF the power supply or remain in the receiving
state and place the transceiver in a cool place.
Change the frequency in band A/band B, or change the
frequency in use.
The battery icon does not show that it is being charged
when charging the transceiver at the charging station.
Nothing is displayed on the screen when charging at the
charging station during power OFF. In this case, check
the LED of the charging station for the status.
Search for the Bluetooth device and connect when found.
Wait for the Bluetooth device to be ready before
searching.
Set the USB selection setting to "COM+AF/IF Output".
Set the USB selection setting to "COM+AF/IF Output". If
you still cannot hear anything, check the PC settings.
Set the USB selection setting to "Mass Storage".
Use a microSD memory card that was formatted on the
transceiver.
Move to a location with good propagation.
If the reception still does not improve, it could be due
to bad propagation between the other station and the
access repeaters of the other station. Inform the other
station and ask them to adjust the output, or have them
move to a location with good propagation.
Register the Callsign in the D-STAR management server.
Check with the management organization of the
repeater.
Wait for a while and call again.
The transceiver may mistake the receiving of packet loss
with garbled data. In that case, "L" display will light up on
the display even in local area call.
Wait for a while and call again.
Set the correct access repeater to "FROM".
Set the repeater frequency (or shift setting) correctly.
Move to a location where the signal reaches the
repeater. Or, access another repeater where the signal
reaches.
Wait for a while and call again
Set the correct repeater Callsign.
Check with the management organization of the
repeater.
Cancel data communication mode and transmit using
[PTT].
If it is not necessary, set "GPS Info. in Frame" to Off.