MXR - 117 Flanger  [schematic]

All about modern commercial stompbox circuits from Electro Harmonix over MXR, Boss and Ibanez into the nineties.
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jaycobie
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Post by jaycobie »

Official service schematic and component layout of the vintage MXR 117 Flanger



This is one I haven't found posted elsewhere (for free), so here it is.
Marked as official, and I can confirm that it looks to be spot on compared to mine.
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MXR 117 Service Schematic Reprint.pdf
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Scruffie
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Post by Scruffie »

Says it's been removed but i'd be interested to see what additional information it has over the schematic available.

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jaycobie
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Post by jaycobie »

Ah, I see.




Here is a temporary google drive link and re-upload on scribd for a PDF-reprint of the file to avoid further conflicts.
I don't have time to edit it into a picture or two right now but I'd appreciate it if someone else could help with that.
I don't want the quality to degrade right off the bat but it got a bit stretched when I reprinted it in a PDF printer.

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Post by jaycobie »

I just realized that my version IS different, but it's only because it's a different version of the board itself.
The schematic shows the 4001 version of the Flanger, while I have the 3001 version.

The position of C18 is the only physical difference I can find on my own, 3001, 230v version
The other difference I can see is U3 being CD4013AE on version 4001 while my 3001 has CD4013BE. Probably just a minor quality difference in the chips
C21 is, according to the schematic, variable. My 3001 has a 33pF cap (see picture below)
Don't have a reason cross-checking all the resistors and capacitors, but for anyone that's interested, I just like documenting this sort of stuff
Attachments
C21 on my 3001 version
C21 on my 3001 version
Picture of my 3001 230v flanger board
Picture of my 3001 230v flanger board
Obvious difference between the 3001 and 4001 versions
Obvious difference between the 3001 and 4001 versions

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