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No
PROBLEM
.
The
A. The power amplifier tube Q11 is broken and
indicator
there is no power output and please change it with
lights red
a new tube.
when in
B. The microphone is broken, and please change it
transmitti
5
with a new one.
ng but no
C. The operational amplifier IC3 is broken, and
voice can
please change it with a new one.
be heard.
The
A. The speaker is broken, and please change it
indicator
with a new one.
lights
B. The audio amplifier IC8 is broken and please
green
change it with a new one.
when in
C. The switch tube Q36 and Q35 is broken, and
6
receiving
pleas change it with a new one.
but no
D. The operational amplifier IC6 is broken, and
voice can
please change it with a new one.
be heard.
Cannot
A. Make sure the programming cable is well
program
connected.
the radio
B. The computer RS-232 serial port output is
7
parameter
unmoral, and please fix the computer.
s
C. The MIC is not well connected with the SPK
normally.
socket. Check the socket and if it is unable to work
normally please change it with a new one.
Chapter 9 KBC-58L Charger
9.1 Charger Specifications
A) Idling Input Current:
B) Charging Terminal Maximum Idling Voltage:
C) Constant current charging: 200 270mA
D) Maximum Charging Time: 7 hours
E) Maximum Charging Voltage Limit: 8.45 0.1V
9.2 Charging and Charging Indicator
A) When DC inputs power voltage 14~20V, the indicator lights
yellow.
B) When the battery is inserted into the charger, the red and
yellow indicator lights. (The battery power is lower than 8.1 0.1 V. )
(When the voltage is lower than 6.0V, the red indicator become light
slowly after about 20 seconds.)
C) When the battery voltage is lower than 8.1
charger charge the battery with constant current. (Charging current
is 200
270mA. It needs 3~4 hours to charge a battery that has
been discharged completely.)
D) When the battery voltage is higher than 8.1
charging current will decrease gradually; when the battery voltage is
8.2
8.4V, the charging current will decrease quickly; when the
battery voltage is 8.4
8.5V, the charging current will close to zero
(then the charger begins constant voltage output) and charging
stops. This course takes about 2~3 hours.
E) When the battery voltage is 8.2
green indicator lights. When the battery voltage is 8.3
red indicator becomes dime and the green and yellow indicator light.
SOLUTION
30mA
8.8V
0.1 V, the
0.1 V, the
8.4V, the red, yellow and
8.5V, the
PT4200
LED red: Charging indication
LED yellow: Power indication
LED green: Charging completion
Note: After putting the battery pack that has been discharged
completely into the charger, its red indicator needs about 1~2
minutes to turn light.
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
2
E PROM electrically erasable programmable read-only memory
HPF
high pass filter
IDC
instantaneous deviation control
IF
intermediate frequency
LED
Light-Emitting Diode
LNA
low noise amplifier
LPF
low pass filter
MCU
micro control unit
MIC
microphone
MOD
modulation
MONI
monitor
PLL
phase lock loop
PTT
push-to-talk
RX
receiver
SPK
speaker
TCXO
temperature compensated crystal oscillators
TX
transmitter
UL
un-lock
VCO voltage control oscillator
SERVICE MANUAL
14
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