Gday All,
Could somebody help me out with this one please?
Finished populating my Harbinger yesterday but im having a few problems with it -
I can get a bypass signal through fine and signal passes when the effect is on but there is no modulation. Lamp is always on and rate LED does not light at all. Tried jumpering the LED to see if that helped with the lamp pulse but makes no difference.
Only the volume control works, Intensity and Speed do not. Both Mod/Vin and C/V switches have signal when in both positions. Mod setting seems to get the signal to boost a fair bit so I guess that's working fine?
I have double checked all wiring, soldering, resistor values, cap values, electrolytic orientation, transistor orientation, ic's, etc and everything seems fine to me.
Gain and Offset trimmers adjust the lap intensity just fine so I cant see a problem there, I have even checked if the LDR's are working on a breadboard beforehand and they were working in both light and dark conditions, I also checked them with a torch while passing a signal to see if any modulation occurs and there is nada.
Got the DMM out and have the following voltages -
LT1054 pins
1 - 1.10v
2 - 4.99v
3 - 0.00v
4 - 0.01v
5 - 017v
6 - 2.55v
7 - 1.38v
8 - 9.58v
LM7815 Pins (viewed L - R, pins at bottom)
Left - 18.14v
Middle - 0.00v
Right - 14.86v
Any other voltages I need to check?
Im running a 1spot 9v without the filtering to power it, filtering or no filtering its the same problem. Nothing has been substituted at all, its straight a vanilla build.
Any Help is hugely appreciate!
Thanks, Mick.
Could somebody help me out with this one please?
Finished populating my Harbinger yesterday but im having a few problems with it -
I can get a bypass signal through fine and signal passes when the effect is on but there is no modulation. Lamp is always on and rate LED does not light at all. Tried jumpering the LED to see if that helped with the lamp pulse but makes no difference.
Only the volume control works, Intensity and Speed do not. Both Mod/Vin and C/V switches have signal when in both positions. Mod setting seems to get the signal to boost a fair bit so I guess that's working fine?
I have double checked all wiring, soldering, resistor values, cap values, electrolytic orientation, transistor orientation, ic's, etc and everything seems fine to me.
Gain and Offset trimmers adjust the lap intensity just fine so I cant see a problem there, I have even checked if the LDR's are working on a breadboard beforehand and they were working in both light and dark conditions, I also checked them with a torch while passing a signal to see if any modulation occurs and there is nada.
Got the DMM out and have the following voltages -
LT1054 pins
1 - 1.10v
2 - 4.99v
3 - 0.00v
4 - 0.01v
5 - 017v
6 - 2.55v
7 - 1.38v
8 - 9.58v
LM7815 Pins (viewed L - R, pins at bottom)
Left - 18.14v
Middle - 0.00v
Right - 14.86v
Any other voltages I need to check?
Im running a 1spot 9v without the filtering to power it, filtering or no filtering its the same problem. Nothing has been substituted at all, its straight a vanilla build.
Any Help is hugely appreciate!
Thanks, Mick.