Hytera PD362, Service Manual

Page: 89 / 141

Circuit Description
Uc (430
‐
470 MHz)
14
When \RX long press the Power On-Off/ESC key, POWER_KEY- and POWER_ON are at high level, and
the radio powers RQ . After power-on, PWR_ON goes to high level, and PWR-KEY_DET goes to low
level.
During power-off, POWER_KEY- is at low level, while PWR-KEY_DET is at high level. The system
detects power-off procedure via PWR-KEY_DET and implements the power-off procedure. Then
PWR_ON and POWER_ON go to low level, and the power is cut off.