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DOD - FX35 Octoplus  [schematic]

Posted: 30 May 2015, 21:08
by modman
DOD - FX35 Octoplus schematic
DOD - FX35 Octoplus schematic

DOD Octoplus FX-35

Posted: 27 Oct 2017, 14:00
by AdiMacG
Hi,
new to this forum, looks to be full of interesting reading.
I have an old FX-35 which hadn't been used for a long time and I find now that my pedal is no longer working in either bypass or effect mode with either battery or power supply with guitar and amp plugged in.
Also no led light coming on the pedal but the stompbox.
I have found a schematic http://www.americaspedal.net/fx35/ Rev. C on the net but my pedal's PCB is Rev. F. though it could be quite similiar.
I check the stomp-switch for continuity on/off and that seems fine. Interesting link for anyone who needs to change one here http://www.americaspedal.net/fxtech/switchrepair.html

It should be something simple wrong with this pedal but if you have any suggestions or known component issues please let me know.
This Octoplus FX-35 Pedal as you know is quite old so I've checked and retouched any suspect dry solder joints. I have over 8V arriving to the PCB, whether I use a rechargeable 9V or the power supply(center positive).
I suspected a faulty diode 1N4001 (tested in-circuit) was pulling the voltage to ground and so soldered in a 1N4007 but no success. Re-tested the diode 1N4001 out of circuit, this component tested fine.
Could the input jack that controls on/off be the problem? But if it was then my pedal would still work with the PSU plugged in that doesn't depend on the 1/4" input jack.

Your thoughts please?

Regards

DOD FX35

Posted: 10 Dec 2021, 23:41
by atyimd21
Ok so I know better but I’ve done it dozens of times with no problems. Changing out the DOD d.c. jack. This time stupidly left the board in dril caught and pulled in grazing the circuit board. I can’t seem to find where it grazed but it worked fine before and no passes only a clean signal when engaged the pots don’t do anything noticeable. My board is Rev.I I’m posting a few pics any help here would be graciously appreciated

Proper working voltages (if anybody's got' em) would be awesome

Re: DOD FX35

Posted: 10 Dec 2021, 23:47
by atyimd21
New to this so here’s another pic

Image[/img][/img][/img][/img]

Re: DOD - FX35 Octoplus

Posted: 11 Dec 2021, 18:00
by jimilee
Have you taken any voltages with your DMM to see if it's getting any power, and have you used the correct DC adapter? The black and silver diode should be the reverse polarity diode to protect the circuit from just that.