DP405 Service Manual
U21
LT1901A
MCU
IC200
24LC512
E2PROM
,
saves channel frequency data, feature parameters and
modulation parameters
U3
TDA8547TS
Receiver audio power amplification
Q500
RD07S2B
TX final power amplification
Q4
DTA144EE
APC output switch
Q507
3SK318
Receiver power amplifier
Q200
DTC144EE
Red LED driver
Q201
DTC144EE
Green LED driver
Q501
RD01MUS1
Transmitter power amplifier drive
Q601
DTC144EE
Audio power amplifier control switch
IC100
XC6204B50
2MR
5R,5T voltage output
IC102
MP2359
3.5V voltage DC-DC output
U20
MCP4802
DA chip, used for modulation of power and frequency stability
Q602 Q603
ST3400SRG Audio output control switch
IC302
NJM2904
Operational amplifier IC, used for MIC signal amplification
Q502
2SC5108
Transmitter 1st amplification
Q503
2SC3356
Transmitter 2st amplification
4. Feature Description and Parameter Setting
4.1.
Kill and Remote Monitor
Kill
Check this option to receive Kill command and the radio will be disabled.
Kill Decode
Check this option to receive Revive command and the radio will be restored to normal.
Remote Monitor
When the radio receives Remote Monitor command, it will automatically turn on the transmitting and the
monitoring party can listen to the surroundings around the monitored radio.
12
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