Hytera PNC550 - Bottom Microphone Circuit

B9
Troubleshooting Flowchart
31
6.1.9 Bottom Microphone Circuit
Is t he earpiece board M ic
normal? [1]
Does the
wate rproo f an d brea tha ble
Film o r silicon rub be r ca se block
th e Mic?
Yes
No
Remove th e o bsta cle, re-sold er or
rep la ce t he Mic.
No
Rep la ce the main b oard.
Re-at tach or rep lace the wat erproo f
an d brea tha ble film o r the silico n
rub ber ca se.
Yes
St art
End
Rep la ce the earp iece board. Is
th e b ott om micro pho ne no rmal?
Rep air or rep lace the ea rpiece
bo ard.
Yes
Rep la ce the
main-deputy board FPC.
Is t he botto m mi croph on e
normal?
Rep air or rep lace the main-de puty
bo ard FPC.
Yes
No
No
Description of normal situation:
[1] The earpiece board Mic is not blocked and is soldered properly.