Damaged MOD wheel connector? Can someone comment on these pictures?

    Hi


    I'm in the process of repairing a Ti2 with a broken MOD wheel. I found something super fishy on the connector board for the MOD and PITCH wheels. Seems like someone has added some extra soldering, which is shorting three pins together. The soldering looks home-made and most likely not an original work from the factory. I've got some pictures of the connector.


    Here are the pictures:


    https://ibb.co/zmxZ1bp

    https://ibb.co/60kB72J

    https://ibb.co/xgJV0vZ

    https://ibb.co/rsVpLzP

    https://ibb.co/C8ZfYPr

    https://ibb.co/HHWxZy5


    Does this look normal, or just some soldering I should clean out?


    The problem I'm trying to fix is that the MOD wheel is either at 0 or maximum. Zero position on the MOD wheel sends out zero, all other positions send out maximum.


    The pitch wheel is however working fine.


    I'd like to add that the pins that have been soldered are not the pins that are connected to the MOD wheels pot. And when I turn the MOD wheel I'm able to measure a variable 0 to 10k ohm resistance at the end of the cable connecting the wheels to the keyboard (after the messed up connector on the pictures), so the MOD wheel should be working. But this added soldering might still be effecting the behaviour.


    Can anyone in here that's familiar with the internals of the Ti2s confirm if this soldering is needed or not?


    Regards

    Frimann

    Zitat von dreamspy

    I'd like to add that the pins that have been soldered are not the pins that are connected to the MOD wheels pot.

    Curious set of circumstances!

    I'm not an electronics tech but mentioning if you obtained this TI2 new or used might help. :)

    If it is used perhaps the previous owner tried and failed to fix an existing problem and then just wanted to relieve their-self of the unit? :( Have you tried the "hold arp edit button" system reset?

    If the synth is new I would definitely contact support.

    Zitat von dreamspy

    I'd like to add that the pins that have been soldered are not the pins that are connected to the MOD wheels pot. And when I turn the MOD wheel I'm able to measure a variable 0 to 10k ohm resistance at the end of the cable connecting the wheels to the keyboard (after the messed up connector on the pictures), so the MOD wheel should be working. But this added soldering might still be effecting the behaviour.

    Id double check that pot that it really does function correctly. Usually when those type of pots wear out or just have crap inside, the resistance might jump all over the place randomly on one point and return "back to normal" once you just turn it (its also easy to miss measuring it) Simply just measure it whilst you turn it really (REALLY) slowly. One thing with the worn out pots is also common, when you apply any pressure to it (bend the mod wheel even little side to side) it might function correctly for that period of time or via versa.

    On the pictures you sent, the traces coming from the shorted pins seems to lead nowhere?. They are just hanging on the air, but then again thers no idea where they lead to on the main board. I suppose it could be just a revision of a board also used in earlier models and differs slightly componentwise, this is quite common in electronics just to "quick fix" it rather than start producing completely new PCBs .

    Zitat von GESchwalm

    Curious set of circumstances!

    I'm not an electronics tech but mentioning if you obtained this TI2 new or used might help. :)

    If it is used perhaps the previous owner tried and failed to fix an existing problem and then just wanted to relieve their-self of the unit? :( Have you tried the "hold arp edit button" system reset?

    If the synth is new I would definitely contact support.

    The synth is not under warranty, but I think it is from 2016. Did a reset but no dice.