DM-1701 issue with internal microphone

[oh4ms]

Received DM-1701 , but internal microphone is totally silent when TX. Lucky I had monophone that suits and gave positive result audio when TX. So, do you have any same kind of experience issue and resolve the problem of case ? All advice is welcome... tnx

Tomi / oh4ms

[SA0BUX]

Received DM-1701 , but internal microphone is totally silent when TX. Lucky I had monophone that suits and gave positive result audio when TX. So, do you have any same kind of experience issue and resolve the problem of case ? All advice is welcome... tnx

Tomi / oh4ms

Most probably it's the MIC/SP connector , bad soldering to the PCB or it's broke.
My first DMR which was a Retevis RT-84 ( same PCB inside as DM-1701 ) had the same problem but I sent it back to the seller that replaced it.
I could program it with the programming cable but no sound on TX with internal microphone.

[oh4ms]

Hey ! Possibly you are right. I can fix the fault you described myself. This radio is brand new, but I noticed the problem only after the firmware update to OpenGd... so I assume that the seller is not eager to take responsibility for a technical problem...

[EA4HEA]

Please be careful when plugin in your cable to the talkie. It must be OFF, there are several reports about the internal mic going down definitely after plugging the usb cable to the computer with the radio On, so please: talkie always off when connecting cables.

[It9fwv]

Ciao io ho bruciato ben 2 volte il mic interno , per risolvere necessita la sosotituzione.
Mi e successo sia con il baofeng che con il tyt md380uv.
Ho dovuto sostituire entrambi i mic, il baofeng e' stato piu difficile in quanto vicino al mic ci sono alcuni condensatori microscopici smd e per non farli saltare via serve un saldatore di precisione ed un microscopio, e fare attenzione .
Aprendo solo adesso che bisogna collegare il cavetto al pc con la radio spenta per accenderla successivamente potrebbe essere questo il problema non ricordo ,comunque faro attenzione a questo.