PT3600 Service Manual
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e) Pre-charge time limit: 15Min.
f) Constant charging current: 400mA ± 40mA.
g) Max. charging voltage for Li-poly battery: 8.32 – 8.42V;
Max. charging voltage for Ni-MH battery: 9.6 ± 0.1V.
9.2 Function Description
1. KBC-31A is an intelligent charger which is safe and reliable,
and has fast charging speed and high charging saturation.
2. Status indication function: In the pre-charge process, the red
LED will flash; in the charging process, the red LED will light; if
the radio is fully charged, or no battery is inserted into the charger
slot, or the battery is in the protection status, the green LED will
light; if the battery output is in short circuit, the yellow LED will
flash.
3. External port of KBC-31A can identify Li-poly battery and
Ni-MH battery.
4. Short circuit protection: If the positive and negative terminals
of the charger are in short circuit, the yellow LED will flash, and
the charging current will be cut off. After the fault is removed, the
charger will resume normal operation.
5. Fully charged battery identification: If the user recharges a
Ni-MH battery that has been fully charged, the charger will still
charge the battery, and will judge if the battery is fully charged
according to normal –
Δ
V; if the user recharges a Li-poly battery
that has been fully charged, the charger will detect the voltage of
the battery. If the voltage is higher than 8.25V, the charger will not
charge; if the voltage is lower than 8.25V, the charger will charge
the battery again.
6. Temperature protection: For Li-poly battery, when the
temperature is higher than 55
℃
, the charger will stop charging,
and the yellow LED will light; when the temperature comes back
to 45
℃
, the charger will start charging again. For Ni-MH battery,
when the temperature is higher than 60
℃
, the charger will stop
charging, and the yellow LED will light; when the temperature
comes back to 50
℃
, the charger will start charging again.
7. When the radio is in the standby mode, if it is inserted into the
charger slot, the charger will charge it automatically if the battery
voltage is lower than 8.2V.
8. If the charger is in the automatic protection state, the yellow
LED will light. After the fault is removed, the charger will resume
normal operation.
Red LED: Charging indication
Green LED: Power indication or charging completion indication
Yellow LED: Abnormal charging indication
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
E
2
PROM: Electrical 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
