Troubleshooting - Yaesu FT-4XE Advance Manual

Troubleshooting

If you suspect a malfunction, check the following items before requesting a repair.
● The transceiver does not turn on.
z Is the battery depleted?
z Charge the battery pack after purchase, and when the transceiver has not been used for a long time.
z Is the battery pack properly attached?
Refer to "Installing the Battery Pack" on the Operating Manual and securely install the battery pack.
● There is no sound.
z Is the squelch level (or S meter squelch) set too high?
Press the MONI/T.CALL key and verify that you can hear white noise.
Adjust the squelch level (or S meter squelch) when receiving a weak signal.
z Is the volume low?
Rotate the PWR/VOL knob clockwise to increase the volume.
z Is the tone squelch or DCS on?
When the tone squelch or DCS is on, the sound is not output until the transceiver receives a signal
containing the same tone frequency or DCS code set.
● There is no transmission of radio waves.
z Are you pressing the PTT switch properly?
z Is the PTT lock on?
z Is the Busy TX Block (Busy Channel Lockout function) on?
When the Busy TX Block (Busy Channel Lockout function) is on, transmission is inhibited when
receiving a signal, even if the PTT switch is pressed. Wait until the signal being received stops and then
press the PTT switch.
z Is the transmission frequency on a ham radio band?
z Is the voltage of the battery pack correct?
Check the remaining charge on the battery pack.
● The keys or PTT do not respond.
z Is the Keypad Lock or PTT Lock on?
● The battery pack cannot be charged or battery power depletes immediately
after charging.
z Is the battery pack being charged with a charger specified by Yaesu?
Charge the battery pack using the accessory Battery Adapter (SAD-20B/C/U/G) or the Rapid Charger
(SBH-22).
z Is the battery pack in use exhausted?
If the red blinking ("Charging Error") appears on the rapid charger cradle indicator when charging,
there is a chance the battery pack is over discharged. If the error is repeatedly displayed after charging
the battery pack several times,the battery pack may have reached its service life or be defective.
Batterypacks are consumables. Please replace an exhausted battery pack with a new one immediately.
Battery packs can be charged and reused up to approximately 300 times.
z Charge the battery pack within the temperature range from +5 °C to +35 °C (+41 °F to +95 °F).
Some specific combinations of signals may cause internal beats ("birdies") from high frequencies, caused
by the internal oscillator. This is not a malfunction.
(See the calculation formula below: "n" is for the arbitrary integer). Also, depending on the combination of
simultaneously received signals, there may be fluctuations in receive sensitivity.
z Receive Frequency = 13 MHz × n multiplicative
z Receive Frequency = 19.2 MHz × n multiplicative
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