Delay Pedal Fault

SidNewton

I've just been rejigging my pedalboard and now I can't power my Mad Professor delay pedal via my power supply. It still works fine with a battery but nothing via the 9v input. What a pain in the arse.

Just wondering whether it's worth the cost of repairing it or less hassle to invest in a Gigrig virtual battery (assuming that would save the day)??

NervousJohn

Repair it. Most likely a dry solder joint on one of the 9v connector pins. Dab with a soldering iron and you should be good to go.

marauder

Or the switching on the input jack.

allicio

I'd send an email to mad prof they have great customer service and I'd put money on them offering a free fix

SidNewton

Cheers fellas. I will have a look at it over the weekend.

marauder

I'm not thinking straight, the input jack is fine if the battery works.

ICBM

marauder said:

I'm not thinking straight, the input jack is fine if the battery works.

Not if it's the negative connection that's broken. In fact that's one of the only possibilities, unless there is a protection diode which only applies to the jack and not the battery.

viz

Yep could be a blown diode, I've had that one 2 boss pedals, an mt2 and a ds1

SidNewton

Drama seems to be over. I've had a poke around inside, moved a few wires around before reconnecting it to a power source and hey presto, all lit up like a Christmas tree.

Thanks for all your input. I'm now walking away rather embarrassed........

">

ICBM

SidNewton said:

Drama seems to be over. I've had a poke around inside, moved a few wires around before reconnecting it to a power source and hey presto, all lit up like a Christmas tree.

You've just disturbed a loose connection somewhere and it will come back at the least convenient possible moment. I would find the fault and fix it properly.

SidNewton

No doubt you're right. I'm sure I just moved a wire sufficiently to resolve the problem for now. I'll have a more thorough look over the next couple of days.

ICBM

The worst one is when it's a job for a customer. You move something and the fault goes away, and no matter how much you poke and prod you can't get it to come back. (Probably because moving it has scraped off the tiny oxide layer that was causing the bad contact.) So after spending far too much time on it, you give up, charge the guy the minimum bench fee and hope for the best. Then two months and 29 days later it shows up with exactly the same fault and the customer wanting it fixed under guarantee...