Lasonic TRC-931 Function Switch Repair

[Lasonic TRC-920]

Here is a video I made on how to repair the function switch for the Lasonic TRC-931.

This switch is also used on the TRC-920.

NOTE: You must first UNSOLDER the function switch from the main PC board.

http://youtu.be/0G26sY92yRE

 

[floyd]

awesome! ,

 

[Cpl-Chronic]

Nice job TRC!! It's amazing how essential a good set of tools are for this hobby. I have soldering iron, files, 3 types of epoxy, lots of extra speakers, fan connectors, resistors, drill, multi-meters, etc.

Still keep thinking of more SHITE I need!! Good grief!

Cpl

 

[SLO]

GREAT video Chris! It's gonna benefit so many 931 owners including myself. My 931 is fully functional but ya never know! That epoxy must be some some good ****! Especially if it can glue Christians to Muslims! LMFAO...TOO funny man

 

[trippy1313]

Chris, great video! Only thing to add, I don't know if you know this, but you're missing what kinda looks like a roller bearing, that sets in the little groove between the gear and metal part. I did a similar fix I've yet posted, but I'll see if I can find my pics.

It's what gives you the "click" feel and position stop.

 

[trippy1313]

Here's what it looks like, it sits in between the teeth as a position stop. I'm not sure if you can see, but in the second pic it's in place.

 

[blu_fuz]

You just gotta get lucky enough to have the gear mostly in tact!!!

 

[JustCruisin]

Repairing a switch for a box you don't even have?!

Chris, you bite your nails?!

 

[trippy1313]

You just gotta get lucky enough to have the gear mostly in tact!!!

True, the one I did had both gears broken, one like this, with one crack, and the other broken into 4 pieces, but I only found 3. Fixed it though. Took forever.

 

[Superduper]

I keep thinking to myself that one day, when I have enough time, I would devise a solid state solution to this problem for this model.

I guess I don't have enough time yet, lol.

 

[blu_fuz]

Maybe I could plasma cut one of those shitty gears!

 

[Superduper]

Maybe I could plasma cut one of those shitty gears!

You can plasma something that small? Probably that's more a CNC type of part but maybe too pricey? Or I'm sure we can mold them if I can just find a good solid one to start with in order to make a mold. Problem is that anyone with a good one of these is not going to want to take apart a good switch. There's so few good ones left, lol.

 

[trippy1313]

As long as someone can find one as close to complete as the one Chris had.

That's probably a possibility.

 

[blu_fuz]

Lol, I was kind of joking only because the part is sooooo tiny. It would be easier to carve it by hand from steel.

I might be able to get it close but it would need some serious finishing and grinding done to clean it up. Actually it would look like a melted blob of steel, no way.

 

[Lasonic TRC-920]

I keep thinking to myself that one day, when I have enough time, I would devise a solid state solution to this problem for this model.

I guess I don't have enough time yet, lol.

Your right Norm, I think that is the ONLY true way to fix this problem.

Missing parts, pieces, gear slices, this was to show what the parts look like and what could be done.

Removing the shaft, gear and slide and simply place a 3 position knob in it's place and wire it up to the pin positions, but there sure are a lot of pins!

Norm, I will mail you this one if you would like to screw with it. I have a main board you can have as well

 

[Superduper]

Chris, I'll PM you in a day or so. It's too late here (CST now, remember?) to chat about this on an iPhone.

 

[blu_fuz]

Removing the shaft, gear and slide and simply place a 3 position knob in it's place and wire it up to the pin positions, but there sure are a lot of pins!

^ yeah, it looks like a shiat load of pins. I was going to attempt to remove a broken switch from a 931 I had. Looked at it for 2 seconds and said "f' that!" hahaha

 

[Lasonic TRC-920]

Chris, I'll PM you in a day or so. It's too late here (CST now, remember?) to chat about this on an iPhone.

PM received and replied

^ yeah, it looks like a shiat load of pins. I was going to attempt to remove a broken switch from a 931 I had. Looked at it for 2 seconds and said "f' that!" hahaha

Yeah, you really need this tool here...It's a "Solder Sucker" soldering iron that pulls the solder off the pin.