Kirisun DM588, Service Manual

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DM588 Service Manual
Backlight Control
9 VCC USB+ Power Output (7~12V)
10 GND Ground Power Ground
Power Supply
The main board provides two routes of power supply for the control panel: one is DC3.3V for the key
scan module and LCD module, and the other is DC13.2V for the hand microphone, LED screen and
backlight lamp.
Keys
The radio has 12 keys: programmable keys (components P4, P7 and P10), direction keys
(components S3, S5, S6 and S9), menu key (component S8), On/Off key (component S11),
Emergency Alarm key (component S1) and volume/channel knob (component S13). The information
of all the keys is sent to the master chip LT1901 that executes operation accordingly.
LED States and Backlight
The LED indicator acts according to the data from the maser chip LT1901. Green light is on when
traffic is received, red light is on when traffic is sent, and the backlight lamp is on when any key is
pressed.
Volume Control
Volume is controlled through an encoder switch. A GPIO signal is sent to the master chip LT1901 to
achieve volume adjustment. A pullup resistor is added to the signal line to increase voltage by 3.3V.
The phase of two input band codes determines the change of volume in direction, while the amount
of pulses determines the variation of volume.
5. Feature Description and Parameter
Settings
5.1.Stun, Revive and Remote Monitor
Stun
When this function is enabled, the radio can be stunned after receiving a Stun command. A stunned
radio can only receive a Revive command but cannot send or receive other signals.
Revive
When this function is enabled, a stunned radio can be revived after receiving a Revive command.
After the radio is revived, it can operate normally again.
Remote Monitor
When this function is enabled, the radio automatically transmits after receiving a Remote Monitor
command, so that the monitoring party can hear the sounds around the radio.
5.2.Scan
Enabling Scan
Press the Scan programmable key to enable Scan and listen to the traffic on other channels. You can
press the Scan key again to exit Scan.
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