Mxr Carbon Copy
- Dirk_Hendrik
- Old Solderhand
Information
Yes it does. At MXR.
Considering the age of the CC I don't expect the factory schematic to surface soon.
Considering the age of the CC I don't expect the factory schematic to surface soon.
hehe, good look for creating this in DIY
- Nikifena
- Solder Soldier
Information
- Posts: 32
- Joined: 30 Nov 2008, 20:35
nice guttshots thanks dude
and that BL3208 delay chips, are these chinese and low cost, low quality chips?!
and that BL3208 delay chips, are these chinese and low cost, low quality chips?!
The trimpots are used to set the modulation depth and frequency (only when modulation is enabled ofcourse). I just sold mine but I always thought it sounded pretty good!DocPlus wrote:What did the trimpots ?
I guess one allows to set the max delay time.
Hi folks,
Now that this pedal has been out for a few years, I'm hoping that someone here might by now have either obtained or drawn out a schem for it - I need one for repair purposes (only) - any quality that's readable is fine, including hand-drawn. So if anyone is now able to post one on here, or PM me with a link or direct me to where I can find one, I would be most grateful.
Many thanks,
Mark.
Now that this pedal has been out for a few years, I'm hoping that someone here might by now have either obtained or drawn out a schem for it - I need one for repair purposes (only) - any quality that's readable is fine, including hand-drawn. So if anyone is now able to post one on here, or PM me with a link or direct me to where I can find one, I would be most grateful.
Many thanks,
Mark.
- blackbunny
- Resistor Ronker
Still haven't seen a schematic for this anywhere, and I would be very surprised if there's one anywhere on the 'net, as MXR are notoriously secretive.
I've repaired a few of these that had the (quite common) switching fault where cooked SMD FET's result in no audio when the effect is switched in, or out, or in either mode.
Apparently the SMD FETs are susceptible to static electricity and can be easily destroyed while plugging and unplugging the pedal into your signal chain.
If this is your problem, you can try replacing the SMD FET Q10 with a J176 or J177 FET, as per the yellow arrows on the photo.
MXR issued a service bulletin a few years ago recommending that SMD FETs Q10,Q11, Q12 and Q13 be replaced with J177 FETs if the delay effect can't be turned on.
I've repaired a few of these that had the (quite common) switching fault where cooked SMD FET's result in no audio when the effect is switched in, or out, or in either mode.
Apparently the SMD FETs are susceptible to static electricity and can be easily destroyed while plugging and unplugging the pedal into your signal chain.
If this is your problem, you can try replacing the SMD FET Q10 with a J176 or J177 FET, as per the yellow arrows on the photo.
MXR issued a service bulletin a few years ago recommending that SMD FETs Q10,Q11, Q12 and Q13 be replaced with J177 FETs if the delay effect can't be turned on.
- Dirk_Hendrik
- Old Solderhand
Information
I've had 2 or 3 on the bench that had the problem blackbunny describes above and were cured by replacing these FET's.blackbunny wrote:Still haven't seen a schematic for this anywhere, and I would be very surprised if there's one anywhere on the 'net, as MXR are notoriously secretive.
I've repaired a few of these that had the (quite common) switching fault where cooked SMD FET's result in no audio when the effect is switched in, or out, or in either mode.
Apparently the SMD FETs are susceptible to static electricity and can be easily destroyed while plugging and unplugging the pedal into your signal chain.
If this is your problem, you can try replacing the SMD FET Q10 with a J176 or J177 FET, as per the yellow arrows on the photo.
MXR issued a service bulletin a few years ago recommending that SMD FETs Q10,Q11, Q12 and Q13 be replaced with J177 FETs if the delay effect can't be turned on.
- Dirk_Hendrik
- Old Solderhand
Information
For what it's worth, since it's a reply to an old post,whiskeytown wrote:nice guttshots thanks dude
and that BL3208 delay chips, are these chinese and low cost, low quality chips?!
I've worked on multiple pedals with BL3208's and never encountered any problems that would suggest low quality (as in poorer than MN32xx Matsuhita chips).
- Bernardduur
- Transistor Tuner
Would anyone know the value of Q2? (located underneath the mix knob??)
I have one on the bench that had worked before but now the unit won't turn on. I tested the unit but the TL062 gets no power. I can trace the V+ up until Q2, then I lose it. Q2 looks really bad (like burned) so my best quess was that Q2 was shot........ but what is it? Transistor? FET?
I have one on the bench that had worked before but now the unit won't turn on. I tested the unit but the TL062 gets no power. I can trace the V+ up until Q2, then I lose it. Q2 looks really bad (like burned) so my best quess was that Q2 was shot........ but what is it? Transistor? FET?
'No more....... loud music.......'
Follow my love for pedals and amps on https://bernardduur.blogspot.com and https://www.instagram.com/bernardduur1
Follow my love for pedals and amps on https://bernardduur.blogspot.com and https://www.instagram.com/bernardduur1
Information
transistor SMD 1RBernardduur wrote:Would anyone know the value of Q2? (located underneath the mix knob??)
I have one on the bench that had worked before but now the unit won't turn on. I tested the unit but the TL062 gets no power. I can trace the V+ up until Q2, then I lose it. Q2 looks really bad (like burned) so my best quess was that Q2 was shot........ but what is it? Transistor? FET?
A19T MOSFET P-CH 30V 4.2A SOT23
Anyone have the actual schematic for the Carbon Copy? Mainly interested in the BBD clock input driving mosfets.
- Lani
- Solder Soldier
Best guess is any TVS with a VBR anywhere between 12 - 15v. Does the CC run off 9v?