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Tytera Unbricking TYT-398/GD-55

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NQ4T

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May 6, 2018
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Hi all,

I know this is an unpopular radio due to the fact it's Tier1; however; it does seem like it would make an acceptable radio for a simplex DMR hotspot.

I got one yesterday from a guy who had it in a drawer for a couple of years after he bricked it. Apparently he did something that cleared out the codeplug and the radio would boot up with "ZONE 1 UNPROGRAMMED" set to a frequency of all zeros and emitting a tone from the speaker before the display blanked out. The original owner told me that in conversations with Radioddity they mentioned something about using JTAG. He had none of that information and I couldn't find any. So in my Googling I found that user Gyuri961012 made a thread about the firmware in which he provided a link to both the firmware and a tool he said fixed his radio.

I found nothing else on the subject and the general consensus that most places pretty much disavowed the fact this radio exists. So I connected the cable and started doing stuff.

What I ultimately wound up doing was flashing the .79 firmware with the tool; which worked. The radio still booted up in his locked state. For some reason...I decided to try booting it up by holding PTT and the orange "man down" button; which someone in the same thread said you used to get in to service mode.

Well...it didn't put me in service mode; instead what it seemed to do was factory reset the radio. Now it's all in Chinese...but it has other channels besides 000.000, isn't emitting the tone, and you can get in to the menus.

So, whatever I did...it unbricked it. If this helps anyone, great. Otherwise...this does seem like it's a pretty flawed radio if you want to use it with a repeater; but it should be fine with a simplex hotspot.

73.
Jay/NQ4T
 

NQ4T

Newbie
Joined
May 6, 2018
Messages
2
Just a followup.

After several hours of trying to figure out how to get to Tyt's website which was apparently up despite not working on 3 different VPNs; I found one that actually got me in. I was able to acquire the CPS and not just reprogram the radio to have English menus again; but I was able to get it working with the simplex hotspot and verify that...yes; whatever I did actually fixed the radio.
 
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