Cepheid chorus no efect and no leds

[mike_666]

Hi all, it's been many years since I had go at making a pedal, so thought I'd have a go at the cephoid chorus.

I fear I maybe being blindingly stupid here (trust me it happens a lot to me!), but I get the dry signal, but don't get any effect and the leds don't light up either, but they do work.

Any help would be most appreciated

 

[mike_666]

 

[swelchy]

I'm sure you tried adjusting the trimmer to find the sweet spot? also your breakout board has a wire looking a little wonky

 

[mike_666]

So today, I discovered I'd put the leds in the wrong way round! I know have the lfo working correctly, and I remade the dodgy soldering on the break out board.

I still don't have any effect, even after twiddling the trim pot. What I'm thinking is it's not getting power, as the led doesn't light (it works I double checked that), and when the switch is turned on I get no effect just sort of noise which does get louder if I use the trim pot.

 

[Locrian99]

Have you checked voltages at the ic’s to verify they are getting power?

 

[Stickman393]

Photos kinda make it look like your top jumper pad for the chip PSU rails isnt properly bridged.

You're building the MN3207 version, yeah?

 

[khanji]

Hi all, it's been many years since I had go at making a pedal, so thought I'd have a go at the cephoid chorus.
I fear I maybe being blindingly stupid here (trust me it happens a lot to me!), but I get the dry signal, but don't get any effect and the leds don't light up either, but they do work.
Any help would be most appreciated

Tutuapp​

 

[Nic]

Hi all, it's been many years since I had go at making a pedal, so thought I'd have a go at the cephoid chorus.
I fear I maybe being blindingly stupid here (trust me it happens a lot to me!), but I get the dry signal, but don't get any effect and the leds don't light up either, but they do work.
Any help would be most appreciated

You should start your own troubleshooting thread. Provide clear pictures of your board and all wiring connections.

 

[mike_666]

Hi sorry for the delay, it's been a bloody awful week at work.

Yes it's the mn3207 chip I'm using, I'll away and check the voltages and the jumper pad and get back to you kind folks.

 

[mike_666]

Here are the chip voltage, and sorry it's the V3207D chip I'm using not the MN3207

 

[Stickman393]

it's the V3207D chip I'm using not the MN3207

Same difference, the v3207d is a 100% drop-in work-alike.

 

[mike_666]

Ah okay, it was just the chip set it came with.

 

[Bio77]

Usually when an effect gives no sound engaged, it's the switch or a wiring problem. If that checks out: Use an audio probe and trace the signal through the clean path. You should get something even if the delay isn't working.