How to change inductor on 535q?

imcorn · April 24, 2006, 10:31:31 AM

Hi!

Could anyone help me with the above? I will be changing the inductor in my 535q (metal can inductor) to a "Halo" inductor, but when i opened up the pedal.. i can't seem to flip the PCB around to get to the other side with all the soldering and stuff. Is it necessary to flip the PCB around or can i just install the inductor on the components side? I do notice that there's some solder along the side of the stock inductor. Is that normal?

Any help will be appreciated as I have spent days trying to find it on yahoo, google and using the search function of this forum as well but to no avail.

Paul Marossy · April 24, 2006, 11:24:20 AM

No, you can't solder a new one in without removing the PCB. You're going to have to take it out to do the mod.

imcorn · April 24, 2006, 12:06:04 PM

hmm..it seems impossible to remove certain parts like the boost button.. anyone noes how to safely remove all the knobs and stuff so that i can gain access to the back of the pcb?

koolimy · April 24, 2006, 08:02:54 PM

Hi...
This might seem like a dumb question, but
Did you unscrew the screw that holds the PCB down?
If you don't screw it out then it will be impossible to access the other side of the PCB, which you need to do to change the inductor...

Paul Marossy · April 25, 2006, 09:55:11 AM

You should be able to simply pull off the knob (or unscrew the set screw on the knob, if one is present) and remove the screw that holds the PCB to the enclosure. The PCB should come right out.

imcorn · May 02, 2006, 11:05:36 AM

unscrewed the screws on the pcb and removed boost button as well.. but the pcb doesn't seem to budge... $:-\$

Paul Marossy · May 02, 2006, 11:16:45 AM

Quoteunscrewed the screws on the pcb and removed boost button as well.. but the pcb doesn't seem to budge...

Did you remove the nuts on the input & output jacks?

LoudGreg · May 02, 2006, 01:12:21 PM

Quote from: Paul Marossy on May 02, 2006, 11:16:45 AM
Quoteunscrewed the screws on the pcb and removed boost button as well.. but the pcb doesn't seem to budge...

Did you remove the nuts on the input & output jacks?

Yea, I think Pauls got it.

I did this with my own 535Q, and it has the kind of jacks that are soddered right onto the terminal board(like a new Phase 90)
1) unscrew both jacks
2) Remove the PCb screw

The PCb should now come right off.

Now for the fun (hard) part:

The inductor is held in place by 5 soddering points. Four corners and (what appears to be ) the ground that is soddered directly to the inductor. Remove all five soddering points (from underneath) with de-soddering braid. And work one side at a time. It was a complete BITCH for me but I was able to loosen it & finally get it out of there. (I replaced mine with a Red Fasel)

Paul Marossy · May 02, 2006, 06:33:49 PM

QuoteThe inductor is held in place by 5 soddering points. Four corners and (what appears to be ) the ground that is soddered directly to the inductor. Remove all five soddering points (from underneath) with de-soddering braid. And work one side at a time.

Hmm... all the new manufacture ones I have seen have four mountings points. Interesting. Is that because it has a metal can around the inductor? I remember seeing one of those Dunlop wahs with a metal can inductor before.

QuoteIt was a complete BITCH for me but I was able to loosen it & finally get it out of there. (I replaced mine with a Red Fasel)

Is that because it was a double sided PCB? Double sided PCBs are always more challenging to remove parts from.

LoudGreg · May 03, 2006, 12:46:23 AM

"Is that because it has a metal can around the inductor?"

Yes, that was it. I don't think it was for grounding purposes. just to secure the inductor on the board.

"Is that because it was a double sided PCB? "
Hmmm not enough experience on my end to know. But I remember sweating, cursing and grabbing plyers trying to get this thing out. After getting the soder off on the underside I had to actually heat up each leg of the inductor and pull it out one leg at a time, plus that stupid fifth connector to the metal can.

I liked working on my Thomas Organ Vox wah much better

Paul Marossy · May 03, 2006, 10:04:54 AM

LoudGreg-

A double sided PCB will have some holes that are plated through, from one side of the board to the other. This can make it very difficult to remove a component that is inserted in one of these holes. It often takes me several passes with desoldering braid (at each connection point) to get enough solder out of the holes before the component will come out of the board - and then it's usually still putting up a fight.

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How to change inductor on 535q?