Kirisun DP480 Service Manual

DP480 Service Manual
32
2
Communication fails
A. Make sure the channels the both radios communicate on are of
the same frequency.
B. The radios use different CTCSS/DCS signaling codes. Set the
same one via PC.
C. Out of communication range.
3
Cannot receive
signals
A. The antenna has bad contact. Screw up the antenna connector.
B. Sensitivity is low. Fine tune the “debugging mode”.
C. The squelch level is too high, so that squelch cannot be enabled.
Set a lower level via PC.
D. The Q3 does not work well. Replace the 2SC3356.
4
Red light on during
transmitting,
but receiver hears
no voice
A. The tube power amplifier outputs no power. Replace with a new
amplifier.
B. The microphone does not work well. Replace with a new
microphone.
5
Green light on
during receiving,
but cannot hear
voice
A. The speaker does not work well. Replace with a new speaker.
B. The audio amplifier IC5 does not work well. Replace with a new
TDA8547.
6
Programming fails
Check wiring.
7
Low voice
Check the settings of volume and MIC gain via the PC Tool.
Appendix 1 Abbreviations
AMP Amplify, amplifier
ANT Antenna
APC Automatic power control
BPF Band-pass filter
CTCSS Continuous tone control squelch system
DCS Digital code squelch
DEMOD Demodulation
E2PROM Electrically Erasable Programmable Read-Only Memory
HPF High-pass filter
IDC Instantaneous deviation control

Kirisun DP480 Specifications

General

Brand	Kirisun
Model	DP480
Category	Two-Way Radio
Language	English