Build Your Own Clone Message Board

Hi there! I have a problem with my Classic Delay, when off the signal pass through, but when I turn it on there is no signal, no led, nothing. I revised the soldering but still, same result. I add a couple of pictures to see if anybody sees what I'm missing. Thanks in advance, cheers!

I don't see anything in particular. The LED not turning on indicates that power is not getting to the PCB, the LED burnt out, or a ground wiring issue.

While you have the PCB out of the enclosure, do this: http://www.byocelectronics.com/board/viewtopic.php?f=9&t=52188

Then reinstall the DC adapter, following these tips: http://www.byocelectronics.com/board/viewtopic.php?f=9&t=52139

Let us know how it goes.

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MasterDelayer/Reverbrador/Ampaholic/TopJacker

Hi Morgan. Actually I already reflowed the solder joints but anything changed.

Do you have access to a multimeter and know how to measure DC voltage with one?

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“My favorite programming language is SOLDER” - Bob Pease (RIP)

My Website * My Musical Gear * My DIY Pedals: Pg.1 - Pg.2

I do have access to one but honestly i have no clue how to use it. Any link where I can see how to apply it in this situation?

Take readings from all pins of IC1 (pin 8 = about 9 volts, pin 4 = 0 volts, the rest should be around 4.5), IC2 pin 1 (5 volts), and the stripped side of D1.

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MasterDelayer/Reverbrador/Ampaholic/TopJacker

Amazing info Morgan! And easy to see. Well, the readings for the IC1, all of them are 0.01 volts but pin 4 that gave me 0.00. IC 2 pin 1 and D1 gave me 0 volts. Just to check I read the wire from the battery and gave me 9.5 volts. :S

Post a photo clearly showing the connections to your power jack please.

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MasterDelayer/Reverbrador/Ampaholic/TopJacker

I don't have it connected to the power jack since the pcb is out of the box. I was powering it with a 9v battery, but issue is the same. Shall I connect it to the power jack? Would that change anything?

The battery connection goes through the DC jack! You need to connect it for the circuit to get power.

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“My favorite programming language is SOLDER” - Bob Pease (RIP)

My Website * My Musical Gear * My DIY Pedals: Pg.1 - Pg.2

Damn it, it though it was a possibility but I wasn't sure about that, sorry, I'm such a noob. Tomorrow I'll connect it at let you all know. Thanks!

As were we all at some point!

BTW, when you connect it, be sure to avoid this common mistake: viewtopic.php?f=9&t=52139

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“My favorite programming language is SOLDER” - Bob Pease (RIP)

My Website * My Musical Gear * My DIY Pedals: Pg.1 - Pg.2

Hi guys! I connected the power jack as shown in the link and here are the new readings. For the IC1, pins 1, 2, 6 & 7 is 0.30 volts. Pin 3 4.30, pin 4 0.00, pin 5 4.73 and pin 8 9.50 volts. The IC2 pin 1 is 0.00 volts. D1 is 9,50 volts.

Pins 1, 2, 6 & 7 on IC1 are all way too low; as Morgan mentioned, they should read right about 1/2 of your power source voltage, as pins 3 & 5 do.

Do you have another dual op amp available in another pedal that is socketed and could easily be pulled out and installed in the IC1 position of the delay? Doesn't have to be a TL072. A 4558, NE5532, TL082, OPA2134A, or the like would work fine. Just need to confirm that you don't have a bad IC there.

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“My favorite programming language is SOLDER” - Bob Pease (RIP)

My Website * My Musical Gear * My DIY Pedals: Pg.1 - Pg.2

There are multiple problems. You should also have 5 volts at pin 1 of IC2. Remove the chip and try taking the voltage straight from the socket. If it’s still low, check the voltage regulator voltages (looks like a transistor).

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MasterDelayer/Reverbrador/Ampaholic/TopJacker

Hi guys, reads from the sockets are the same as with the ICs on. From the voltage regulator i got 9.5 volts from the lower leg, and 0 volts from the upper leg (the closest to the input jack). I couldn't reach the leg in the middle.

Your voltage readings suggest you don't have any ground connection. Do you have a plug inserted into the input jack. You need a plug in the input jack to turn the pedal on.

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*patience is a virtue*

Please do not PM me. email is prefered. keith@buildyourownclone.com

Yes I do! I always measured it with the input plugged.

Do you get continuity between the center leg of the voltage regulator and the negative terminal of the dc adapter jack?

_________________
*patience is a virtue*

Please do not PM me. email is prefered. keith@buildyourownclone.com

The solder joints on your jacks don't look good. They need more heat. It's not just a matter of melting the solder. It's about getting the jack terminal hot enough so that the solder actually adheres to it.

_________________
*patience is a virtue*

Please do not PM me. email is prefered. keith@buildyourownclone.com

Hi! Both center leg and negative terminal give me 0 volts. I'll do as you suggested with the jacks.

Hi again! I did as you said with the jacks but problem remains the same. Any idea about it? Thanks a lot to you all for your time!

The integrity of your solder joints is still a concern. I suggest you remove your chips from the sockets and reflow all joints again. It often can take a few reflows to correct an undetected solder joint.

Have a look at Stephen's post below and please provide an updated photo of the solder side of the PCB when you've reflowed again.

http://www.byocelectronics.com/board/viewtopic.php?f=9&t=52211

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MasterDelayer/Reverbrador/Ampaholic/TopJacker

Ok, I'll have some time in a couple of days. As soon as I'm done, I'll update with new pictures. Thanks!

You don't want to measure voltage. It can still give you 0v reading if there's no continuity. You want to set your meter for continuity and test. It will be the little "horn" or "louder" symbol. The fact that your regulator is getting voltage at the input but nothing at the output suggest that you don't have the common connected to ground.

_________________
*patience is a virtue*

Please do not PM me. email is prefered. keith@buildyourownclone.com