Yaesu FTdx10 COM Port Repair (CP2105 replacement) 

Thank you for your useful guide! My friend's DX10 had the same issue, he ignored it for a while and continued using it for phone work. When I took it apart to replace the chip, his chip had shorted and burned the board quite severely. I was able to scrape away the burned sections and replace the chip still, only running wires to the necessary pins according to the schematic. But it's something to be cautious of, if your radio has this problem, probably don't want to keep using it. Who knows though maybe mine was a one-off situation.

Great detective work. Thanks for posting and sharing.

Excellent video. You described my issue with my FTdx10 exactly. Yaesu USA wasn't much help when I contacted them and told be they only support using the USB with Windows. Doesn't say much for us users of Mac and Linux. I guess I'll have to send mine back to them for repair along with a link to your video. Maybe then they can admit to the issue. Once it is repaired I'll be sure to remove the 4.7u cap. Thanks for your work. I look forward to being able to order a CatTouch for both the dx10 and my FT710 soon.

Awesome content Chris!! What a discovery!! Cheers Cesar EA3IAV

Chris... great video. I have the CAT touch with my FTDX-10 and love it. I also have an SMD repair station, but I am not very skilled with it, so I'd rather avoid the issue with the USB port. If you get the CAT Touch to program the PROM, I'd be very intertested in buying your solution as a preventative measure. Does the failed USB port take out all of the USB function including the mouse input and communication with WSJT-X , FLDIGI and similar software products? I am assuming so. On a side note, I have a very well shielded USB cable and a type 31 ferrite donut that I've wrapped it through a few turns. Do you think that would also help from a preventative perspective? I also have the Palomar Engineering EMI kit installed which puts ferrite around every input and output of the radio (that kit addressed then USB cable mentioned). My IC-7300's USB port would occassionally lock up and I'd have to cycle power. I observed it was typically during transmit so I bought a better USB cable and it solved that problem.... but it wasn't catastrophic failure like the YAesu apparently is subject to. 73's and best wishes.

Thanks for this Chris. Would you change your methodology for heating and removing the chip to safeguard the other localised components? G0DVF

Did you tell Yaesu about this ?? So if I understand correctly when you buy a new transceiver you first need to remove the cap before connecting a USB cable ?? Correct ?? Cheers Phil ON4VP

Emailed them about my DX10 having a similar issue. Estimated at 800 for a new board and 90 for labor. plus shipping to get it there. Basically 400 off from a new rig.

When scan the non-working chip, do you see incorrect IDs?

Before you desolder the CP2105 chip, measure the USB2512 chip. USB2512 was damaged in my FTDX-10. You will save yourself a lot of work.

So, if the CP2105 goes into one time programming mode, it should still work, except the VID/PID would change. Was looking for you to confirm that, otherwise, it just looks like the CP2105 just "died"?? Also wonder what would happen if the 4.7uF capacitor was removed. Seems like it doesn't need to be populated. Would it recover? I love the Kapton tape approach. Great "trick"...

Hello. I have two questions. One: Does the new CP2105 need to be programmed before or after soldering? And two: I have a similar problem with my FTDX101D but the difference is that I don't see the serial ports and the sound devices, I think the usb2512bi chip is broken. Do you have an idea how I can check which chip is bad?. Thanks.

But do you solder with lead-free tin or?

They should cut the trace on the 4.7 uf after the radio is programmed at the factory. I believe the real test is if it will take a FW upgrade/Update...