8. Troubleshooting
A. The battery and the radio are not reliably connected. Please reinstall the battery.
B. The fuse of the power supply is burnt out. Please change it.
C. The power switch is in failure. Please change it.
D. The battery is out of power, please recharge it or change it.
E. The CPU is broken, please change it.
A. The channel frequency setting is out of range, please reset the channel data.
B. The crystal oscillator of phase lock loop is broken, please change it.
C. The oscillating tube is broken, please change it.
D. The phase lock loop IC is broken, please change it.
A. The frequencies of both users are not the same. Please select the same
frequency channel again.
B. The CTCSS/DCS signals of both users are not the same. Please reset it.
C. The radio is out of effective communication range.
A. The antenna is in poor contact. Please fasten the antenna head.
B. The HF amplifier is broken, please change it.
C. The squelch level is so high that the squelch cannot be opened. Please reset the
squelch level.
D. The mixer tube is broken, please change it.
E. The FM processing IC is broken, please change it.
A. The power module is broken, so there is no power output. Please change it.
B. The microphone is broken, please change it.
A. The speaker is broken, please change it.
B. The audio amplifier is broken, please change it.
Causes and Solutions
Causes and Solutions
Problem
Problem
The radio cannot
be switched on or
no display after
being switched on.
No signal
The transmitting
red light is on, but
no voice is heard.
The receiving green
light is on, but no
voice is heard.
Phase lock loop
unlocked (Beeping)
Cannot transmit
No signal
No.
No.
1
4
2
5
3
4
6
9. Specifications
General Specification
Frequency
Number of channels
PT578
136-174MHz, VHF
400-450MHz, UHF
420-470MHz. UHF
16
15
16
