dazzler8985
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I've acquired a pair of TYT MD-380 radios, decommissioned from a school setting. The 'net' in the school consisted of five radios of this exact type.
The 'as supplied' codeplug in each radio is simple, the radio is given a 'contact name', one frequency, list of five contacts and use of basic encryption. My two radios were 'Headteacher' and 'Field'. One radio, 'Field' has issues, 'Headteacher' is the good guy and functions perfectly.
As obtained, 'Field' will not play any audio on DMR at all. It receives a signal from it's counterpart, shown on the screen, but no speech comes through. It will transmit perfectly though, audio is clear and well modulated. The speaker works fine, power on tone and keyboard tones work. Retested with my MD-390, DM-1701, fault persists on DMR rx only.
I've completed the following steps in order to fault find:
Antenna swapped, battery swapped and fully charged. Speaker/mic plugged in and attached, fault persists.
Firmware loaded: Factory MD380-D3.20, original was D2.24. Blank codeplug installed via 'tyt_kd4z_4.0'.
New codeplug, single PMR446 frequency set both on digital and analogue. No encryption set on digital, no CTCSS/DCS set on analogue. Digital contact list set as Local 9, slot 1, colour code 1, admit criteria 'always', in call criteria 'always'.
Analogue tx/rx works perfectly fine, good clear audio both ways. Digital still good tx, no audio on rx but radio shows the presence of an expected transmission.
Known working codeplug from my MD-390 installed in both MD-380s. 'Headteacher' all good, 'fault in 'Field' still persists.
Loaded various version of MD380 Tools and TYT toolz firmware, problem still the same. Loaded Voice Crypt 1.0a & 1.4p alpha. All this firmware functioned perfectly in terms of menu operations, non-encryption setting, etc, but still no audio coming through on DMR even when promiscuous mode was set. I did notice that 'Field' would sometimes display the incorrect time slot on the aforementioned forked firmwares. TX from 'Field' would always work as expected.
Now, sister radio 'Headteacher' was subjected the above procedures and worked perfectly well as part of a mirroring process. No time slot display errors.
So, am I looking at a software/firmware fault or something that it at a hardware level?
Observations and advice greatly appreciated, thank you.
The 'as supplied' codeplug in each radio is simple, the radio is given a 'contact name', one frequency, list of five contacts and use of basic encryption. My two radios were 'Headteacher' and 'Field'. One radio, 'Field' has issues, 'Headteacher' is the good guy and functions perfectly.
As obtained, 'Field' will not play any audio on DMR at all. It receives a signal from it's counterpart, shown on the screen, but no speech comes through. It will transmit perfectly though, audio is clear and well modulated. The speaker works fine, power on tone and keyboard tones work. Retested with my MD-390, DM-1701, fault persists on DMR rx only.
I've completed the following steps in order to fault find:
Antenna swapped, battery swapped and fully charged. Speaker/mic plugged in and attached, fault persists.
Firmware loaded: Factory MD380-D3.20, original was D2.24. Blank codeplug installed via 'tyt_kd4z_4.0'.
New codeplug, single PMR446 frequency set both on digital and analogue. No encryption set on digital, no CTCSS/DCS set on analogue. Digital contact list set as Local 9, slot 1, colour code 1, admit criteria 'always', in call criteria 'always'.
Analogue tx/rx works perfectly fine, good clear audio both ways. Digital still good tx, no audio on rx but radio shows the presence of an expected transmission.
Known working codeplug from my MD-390 installed in both MD-380s. 'Headteacher' all good, 'fault in 'Field' still persists.
Loaded various version of MD380 Tools and TYT toolz firmware, problem still the same. Loaded Voice Crypt 1.0a & 1.4p alpha. All this firmware functioned perfectly in terms of menu operations, non-encryption setting, etc, but still no audio coming through on DMR even when promiscuous mode was set. I did notice that 'Field' would sometimes display the incorrect time slot on the aforementioned forked firmwares. TX from 'Field' would always work as expected.
Now, sister radio 'Headteacher' was subjected the above procedures and worked perfectly well as part of a mirroring process. No time slot display errors.
So, am I looking at a software/firmware fault or something that it at a hardware level?
Observations and advice greatly appreciated, thank you.
