Members farfignewgon Posted February 10, 2014 Members Share Posted February 10, 2014 I'm currently doing the switch/LED replacement, double preset and looper mods on my DL4. Everything works fine with the exception of the double preset mod. In double preset mode, if i change the delay time, the delay is a weird, warbly, digital interference sound. It's basically the same sound you get when you're turning the delay time knob...but it never goes away. I've plugged in an expression pedal and it seems to do the same thing...however, for the expression pedal to work i have to have my double preset mod button turned on. Any ideas on what i did wrong? Here are a few pics (all white wires is the double preset switch, red wires is the looper mod switch) Switches are DPDT with LEDS. Power and ground for the looper mod switch are coming from the double preset switch. Link to comment Share on other sites More sharing options...
Members farfignewgon Posted February 10, 2014 Author Members Share Posted February 10, 2014 I haven't added the diode to the power side for the LEDs yet, but i wouldn't think that would cause this issue. Link to comment Share on other sites More sharing options...
Members Faldoe Posted February 11, 2014 Members Share Posted February 11, 2014 You need to have the ground wire on the expression jack tough both the ring and sleeve. Link to comment Share on other sites More sharing options...
Members farfignewgon Posted February 11, 2014 Author Members Share Posted February 11, 2014 Something like this? (i would be adding the purple wire in this diagram) Link to comment Share on other sites More sharing options...
Members Faldoe Posted February 11, 2014 Members Share Posted February 11, 2014 Yes Also, the resistor wiring is wrong: http://www.diystompboxes.com/smfforum/index.php?topic=89439.0 Link to comment Share on other sites More sharing options...
Members farfignewgon Posted February 13, 2014 Author Members Share Posted February 13, 2014 Still no luck. I took the switch out completely and just put the 10k resistor between the tip and ground on the expression pedal jack solder points. (I also tried putting the ring to ground as well) Still the same warbly digital interference delays on certain delay settings...others work fine. Could there be an issue with the board? Link to comment Share on other sites More sharing options...
Members Faldoe Posted February 14, 2014 Members Share Posted February 14, 2014 try doing a hard reset - holding switches A and D (far left and far right switches), while powering on the unit. You'll loose your preset settings, but thats what happens. I've had to do that after replacing the footswitches. Link to comment Share on other sites More sharing options...
Members farfignewgon Posted February 16, 2014 Author Members Share Posted February 16, 2014 Yes. The dl4 works fine when the mod is disconnected. Classy. Not a tard, built/modded plenty of pedals with no issues. Switch is latching, as is the looper mod switch, which works fine. All I'm doing now is a 10k resistor directly between the tip and ground solder points of the exp. jack. Link to comment Share on other sites More sharing options...
Members Faldoe Posted February 16, 2014 Members Share Posted February 16, 2014 grunge-rock wrote: Yes. The dl4 works fine when the mod is disconnected. Classy. Not a tard, built/modded plenty of pedals with no issues. Switch is latching, as is the looper mod switch, which works fine. All I'm doing now is a 10k resistor directly between the tip and ground solder points of the exp. jack. did you lift the tabs on the expression jack. - When you insert an external expression pedal, the tabs on the jack are lifted by the inserted expression pedal. Since you're not using on, you have to physically bend up the tabs to simulate the plug.If you have a DMM, I think right now you'll get a reading that the tip is shorting to ground. Once you lift those tabs on the jack, it should read open. The mod should work then. Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.