Jumpers for broken USB port

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joepaisley
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Jumpers for broken USB port

Post by joepaisley » December 5th, 2018, 6:01 pm

I'm working an a PM3 from our club and the USB connector broke loose and pulled the pins and traces from the circuit board. Does anyone have a photo that shows what components on the board goes to which connector pin so I can install jumper wires?

TIA!

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Citroen
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Re: Jumpers for broken USB port

Post by Citroen » December 5th, 2018, 6:22 pm

Can you post some photos on https://imgur.com and post the links on here?

I've got a Mk1 PM3 (where the supercap is knackered).

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Carl Watts
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Re: Jumpers for broken USB port

Post by Carl Watts » December 5th, 2018, 10:56 pm

Yes if the serial number of the PM3 starts with a 1, 2 or 3 and its running the early firmware version like V82, V101 or V108 the tracks from each of the 4 pins on the USB socket go to a chip inductor close to the socket.

You can use a fine copper wire from the socket and solder it to the top of the chip inductor closest to the socket.

I use fine enameled wire and tin one end, solder it to the socket that has already been resoldered to the board, cut it to length, lift the wire and tin it then solder it to the top of the inductor.

You need to make a good job of soldering the USB socket to the board. Its made easier by first removing the heartrate socket or you just cannot get the iron in the gap without melting it.

PM me if you intend updating the firmware from a really old version like V61 or V82, there is a trick to it.
Carl Watts.
Age:51 Weight: 98kg Height:183cm
Concept 2 Monitor Service Technician & indoor rower.
http://log.concept2.com/profile/863525/log

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Citroen
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Re: Jumpers for broken USB port

Post by Citroen » December 6th, 2018, 4:26 am

Carl Watts wrote:
December 5th, 2018, 10:56 pm
PM me if you intend updating the firmware from a really old version like V61 or V82, there is a trick to it.
Please keep the discussion public, then it helps everyone.

https://www.concept2.com/service/monitors/pm3/firmware
For ancient versions you need to start with a Windows system by running http://software.concept2.com/pm3firmwar ... 1Setup.exe

joepaisley
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Re: Jumpers for broken USB port

Post by joepaisley » December 6th, 2018, 9:36 am

Thanks for the replies. Here is a close up of the USB pins. The solder pads were torn off when the connector came loose. Could someone identify which SMDs the traces go to?

Thanks!

https://imgur.com/a/3ugStpk

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Carl Watts
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Re: Jumpers for broken USB port

Post by Carl Watts » December 6th, 2018, 4:15 pm

You have the newer version of the PM3 so your pretty much stuffed.

Get yourself another monitor the same thats good and use a multimeter on ohms.

Not seen the USB socket pushed off the board on a later version, a few tach sockets and these can be hard to fix as the tracks can be on the internal layers of the board and then pop up elsewhere.

Probably not worth spending the time on, a new PM5 is cheap in the USA if you must have a USB connection and most people never use it, even to update the Firmware. 90% of the monitors I see for service have never updated the Firmware.
Carl Watts.
Age:51 Weight: 98kg Height:183cm
Concept 2 Monitor Service Technician & indoor rower.
http://log.concept2.com/profile/863525/log

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