19
20
N Problem Solution
N Problem Solution
C.The IC U101 of phase lock loop is
broken.Please change IC.
5 The red
transmission
Indicator lights
but no sound
is heard.
3 No talkback
4 No receiving
signal
A.The frequency is not right. Please reselect
the channel of the same frequency.
B.The CTCSS/DCS code is not the same.
Please reset it.
C.Please check the TX/RX signalling system
of both.
D.It is out of the effective communication
range.
E.The FM IC U101 is broken. Please
change IC.
A.The power-amplifier tube Q23/Q25 is
broken, resulting in no power output.
Please change it.
B.The microphone is broken. Please change
it.
o.
o.
D.The battery is out of power. Please charge
or change it.
E.CPU is broken, Please change the IC.
2 Phase lock
loop
unlocked
(Beeping)
A.The crystal X1 of phase lock loop is broken.
Please change it.
B.The oscillator tube is broken. Please
change it.
A.The antenna is not in good contact. Please
fasten the antenna head.
B.The high-frequency amplifying tube Q26 is
broken. Please change it.
C.The squelch level is set to high Please
reset the squelch level.
D.The mixed tube Q21 is broken. Please
change it.
The green
receiving dicator
lights but no
sound is heard.
C.The power amplifier U201 is broken.
Please change it.
A.The speaker is broken. Please change it.
B.The audio power amplifier U11 is broken.
Please change IC.
6
14. Major Specifications
Frequency Range: 136MHz--174MHz 350MHz--400MHz
400MHz--470MHz 450MHz--520MHz
Channel Number: 128 (divided into 16 zones and
at most 16 channels per zone)
Channel Spacing: 25 kHz (wide band)/ 20 kHz (medium band)
/12.5 kHz (narrow band)
Operating Voltage: 13.6V DC
10%