bass pedal repair

[PunkPonyPrincess]

Another lost cause saved from landfill.

Roland PK5 Bass pedals, bought for £200 locally, non functioning. No battery pack, burn marks on battery leads. No PSU. Someone obviously tried plugging in the wrong one via the wrong input... Roland and Boss historically were a bit weird on their power delivery methods for pedals back in the day but a former owner has been even weirder.

Proper 9V PSU obtained, new battery pack fitted, some minor track cleaning and repair, D1 diode replacement, fried (cracked) npn (Q3) to replace, hopefully nothing else downstream, caps all ok. can’t get a service manual (http://servicerepairmanuals.netlook like they are not functioning) so I am flying cautiously. And yes, the inductor tests ok. The (D3) 5v6 zener Is untroubled, I even read 9v up to the npn so I was cautiously hopeful the custom chip is ok.

Parts arrived. Cleaned the board, made me a broken trace with clippings from the diode. Fitted a battery pack as well.

worked first time

Discovered to my great joy I can have multiple synths running, so a few classic old synth VSTs have all been chained to MIDI channel 2, (Taurus Plug-in seems to be fixed on 2) so tap into poly mode and *MASSIVE* sounds ensue... mellotron VST next...

Edited April 23, 2019 by PunkPonyPrincess
Image download for classified ad.

[songofthewind]

Good work! Less landfill and more music!

[Cuzzie]

Nice work

[Teebs]

Nice!

[PunkPonyPrincess]

I just put this up for sale in /classifieds because I found another poorly pedal in need of my restoration services, a PK6.

£50 markup (with the the PSU at £7 and the battery Pack at £3 plus £3 for components plus my time) seems ok?

Edited April 23, 2019 by PunkPonyPrincess
https://www.basschat.co.uk/topic/341328-roland-pk5-midi-foot-pedals/

[Teebs]

6 minutes ago, PunkPonyPrincess said:

I just put this up for sale in /classifieds because I found another poorly pedal in need of my restoration services, a PK6.

Cottage industry in the making!

[PunkPonyPrincess]

No, no, no I am not into that restoration for profit thing but I am a sucker for a fixer-upper. Only Mr Sting and Geddy Lee need two footpedals.

Edited April 23, 2019 by PunkPonyPrincess
Miiiiissssttterrrrrr Steeeeeeeeennnnnnnnggggggg!

[Teebs]

10 minutes ago, PunkPonyPrincess said:

No, no, no I am not into that restoration for profit thing but I am a sucker for a fixer-upper.

Still, no harm in giving life back to the broken things & earning a few pounds

Helps to pay for the next fixer-upper!

Edited April 23, 2019 by Teebs
sbelingz

[PunkPonyPrincess]

That’s the plan for the PK5 and this bassline sweetie I just rescued. 

 

This way people know what it went through to get working again before sold... nothing to hide when your PCB is nekkid to the world.

Edited April 23, 2019 by PunkPonyPrincess

[itu]

Oh dear, I had a similar Prodigy long ago. Happy, that I separated from it. Not MIDI and nevertune as a factory option. Funny thing is that they ask funny prices of those just because it says moog.

[Si600]

Could you give any advice on repairing pedals? I've got an elderly Boss GE7-B where the status LED has gone AWOL?

[PunkPonyPrincess]

Not really i’d need to see inside the thing and look at a schematic.

[PunkPonyPrincess]

Oh my gawd....

[Teebs]

Another one!?!?!!

[PunkPonyPrincess]

Another one

Edited April 24, 2019 by PunkPonyPrincess

[prowla]

I've got a set of PK-5A and they are rather good (though I would've preferred they were mains powered rather than using an external PSU). Once you learn the channel/patch/octave dance they are quite straightforward to use.

I've got a 12-Step which I need to get to grips with; it's more of a program it via a laptop approach.