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guitarzan13 · April 24th, 2007, 08:56 AM

I'll post here first...

I have a Warwick Corvette Bass that I'm trying to repair for a friend....It has 3 pots......volume, tone, and blend (fader) for the pickups....All grounds look good, but when you touch the blend pot(metal knob) it buzzes like crazy! Like a ground to the hot lead buzz.....any ideas.....????

4mal · April 25th, 2007, 10:51 AM

active or passive ? If it's active, the pre is likely bad. I've seen the internals of one warwick and the pre was a monster circuit board with the pots hard mounted. If it's one of those... time to scrap the pre ...

guitarzan13 · April 25th, 2007, 02:07 PM

Quote:

Originally Posted by 4mal

active or passive ? If it's active, the pre is likely bad. I've seen the internals of one warwick and the pre was a monster circuit board with the pots hard mounted. If it's one of those... time to scrap the pre ...

Passive.....

4mal · April 26th, 2007, 04:17 PM

well it could in fact be a ground to hot. That should be a stacked Pot is there anything like a solder drip jumping the two pin sets ? Where is the bridge ground connected.

I don't know how far you want to get into this but - I would do a diagram and then un-wire. Replace the stacked pot and wire it vol/vol/tone in the standard jazz wiring scheme. If you get no buizz - get a replacement for the stacked pot.

It's that old process of elimination thing.

guitarzan13 · April 26th, 2007, 04:23 PM

This is the layout....
Specifics:
2 Passive MEC Jazz pick-ups. (This model is completely passive.)
1 Volume Control (Part #M83500 - 500K)
1 Pick-up Pan Control (Part #M86252 – 220K)
1 Tone Control (Part #M81500 – 500K Log)

Schematic
http://www.warwickbass.com/schematic...crvttepass.gif

April 24th, 2007, 08:56 AM	#1 (permalink)
guitarzan13 Tele-Afflicted Join Date: Jul 2006 Location: LaGrange, GA Age: 44 Posts: 1,806 8 Photos	Electronics Buzz- Warwick Bass I'll post here first... I have a Warwick Corvette Bass that I'm trying to repair for a friend....It has 3 pots......volume, tone, and blend (fader) for the pickups....All grounds look good, but when you touch the blend pot(metal knob) it buzzes like crazy! Like a ground to the hot lead buzz.....any ideas.....???? __________________ Practice make permanent!!!!....Perfect practice makes perfect!!! Chris B. www.neonjones.com

April 26th, 2007, 04:23 PM	#5 (permalink)
guitarzan13 Tele-Afflicted Join Date: Jul 2006 Location: LaGrange, GA Age: 44 Posts: 1,806 8 Photos	This is the layout.... Specifics: 2 Passive MEC Jazz pick-ups. (This model is completely passive.) 1 Volume Control (Part #M83500 - 500K) 1 Pick-up Pan Control (Part #M86252 – 220K) 1 Tone Control (Part #M81500 – 500K Log) Schematic http://www.warwickbass.com/schematic...crvttepass.gif __________________ Practice make permanent!!!!....Perfect practice makes perfect!!! Chris B. www.neonjones.com

April 25th, 2007, 10:51 AM	#2 (permalink)
4mal Friend of Leo's Join Date: Mar 2003 Location: The Gorge Posts: 2,510	active or passive ? If it's active, the pre is likely bad. I've seen the internals of one warwick and the pre was a monster circuit board with the pots hard mounted. If it's one of those... time to scrap the pre ...

April 26th, 2007, 04:17 PM	#4 (permalink)
4mal Friend of Leo's Join Date: Mar 2003 Location: The Gorge Posts: 2,510	well it could in fact be a ground to hot. That should be a stacked Pot is there anything like a solder drip jumping the two pin sets ? Where is the bridge ground connected. I don't know how far you want to get into this but - I would do a diagram and then un-wire. Replace the stacked pot and wire it vol/vol/tone in the standard jazz wiring scheme. If you get no buizz - get a replacement for the stacked pot. It's that old process of elimination thing.

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