VHF1 (136
‐
174 MHz)
Circuit Description
13
5. Circuit Description
5.1
Front Panel
Front panel includes components such as Power On/Off key and fan. The function diagram is shown
above.
Power Supply
The front panel is powered by the main board via Q5017, which is used as power supply for LED
indicator and USB devices. The fan is powered by the main board via Q2017, Q1 and U2016.
Keys
There is only one Power On/Off key on the front panel.
MMC Interface
Please refer to
for definition of the MMC interface.
Audio Output
The front panel provides one audio output: SPK±. SPK± is output by audio PA U3002 as audio signal for
the speaker of the palm microphone.
Содержание MD652
Страница 1: ...DIGITAL MOBILE RADIO...
Страница 5: ...UHF1 400 470 MHz...
Страница 9: ...Product Controls UHF1 400 470 MHz 2 Bottom View No Part Name No Part Name 1 Label 3 Fan 2 Fan Cover...
Страница 15: ...Exploded View and Packaging Guide UHF1 400 470 MHz 8 3 2 Packaging Guide...
Страница 53: ...43 9 PCB View Front Panel PCB View Top Layer X...
Страница 54: ...44 Front Panel PCB View Bottom Layer...
Страница 55: ...45 Main Board PCB View Top Layer...
Страница 56: ...46 Main Board PCB View Bottom Layer...
Страница 106: ...VHF1 136 174 MHz...
Страница 110: ...Product Controls VHF1 136 174 MHz 2 Bottom View No Part Name No Part Name 1 Label 3 Fan 2 Fan Cover...
Страница 116: ...Exploded View and Packaging Guide VHF1 136 174 MHz 8 3 2 Packaging Guide...
Страница 154: ...43 9 PCB View Front Panel PCB View Top Layer...
Страница 155: ...44 Front Panel PCB View Bottom Layer...
Страница 156: ...45 Main Board PCB View Top Layer...
Страница 157: ...46 Main Board PCB View Bottom Layer...
Страница 207: ...1616300000360 11 2014 L07157 2014 Hytera Communications Corporation Limited Hytera Communications Corporation Limited...