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So I get in a Fender FM212R that has a broken Treble control.
The guy said all that he did was 'bump it with his knee' and the knob & shaft snapped off.
A little research shows that the control is not available with the snap in legs.
I found the non snap-in at Mouser and ordered it in.
Got a new knob from Darren Riley.
As I am disassembling the chassis to get the PCB out I snap off three other control shafts.
WTF.
Now, I have worked on a number of these amps without this issue.
This poor guy had the same problem: http://www.mylespaul.com/threads/hel...ciated.400763/
So I did some sleuthing and it turns out that the factory controls are a tad oversized for the knobs.
If you push the knob down too far it really pinches the splined/ split shaft & sets it up for a fatigue failure.
I used my heatgun to slightly soften the inside of the knobs when I reassembled the chassis to the original style controls.
That will prevent future reoccurrence's of breakage.
The non snap-in controls fit the knob fine.
I wonder how many FM amps are like this?
Or was it simply a run of oversized/ mis spec'd controls.
The guy said all that he did was 'bump it with his knee' and the knob & shaft snapped off.
A little research shows that the control is not available with the snap in legs.
I found the non snap-in at Mouser and ordered it in.
Got a new knob from Darren Riley.
As I am disassembling the chassis to get the PCB out I snap off three other control shafts.
WTF.
Now, I have worked on a number of these amps without this issue.
This poor guy had the same problem: http://www.mylespaul.com/threads/hel...ciated.400763/
So I did some sleuthing and it turns out that the factory controls are a tad oversized for the knobs.
If you push the knob down too far it really pinches the splined/ split shaft & sets it up for a fatigue failure.
I used my heatgun to slightly soften the inside of the knobs when I reassembled the chassis to the original style controls.
That will prevent future reoccurrence's of breakage.
The non snap-in controls fit the knob fine.
I wonder how many FM amps are like this?
Or was it simply a run of oversized/ mis spec'd controls.
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