Beng
First Lieutenant   Posts: 10 Registered: 2/22/2008 Status: Offline
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posted on 2/28/2008 at 16:43  |
My 498T pickup stopped working at its full volume after I had to reattach
the ground sleeve to the pot. I've tried a new pot, but the volume is
still the same, about half of what the 490 neck pick up is. I've tried
wiring it direct to the switch, bypassing the controls, but the result was
the same. The pickup measures 15.5k on the meter. I hope I haven't ruined
the pickup somehow, please help me out.
Thanks
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brian
Moderator   Posts: 1038 Registered: 12/22/2003 Status: Offline |
posted on 2/29/2008 at 12:10, Reply 1 |
Sounds like a cold solder joint to me. recheck your soldering. It's pretty
hard to mess up a pickup unless you take it apart.
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Beng
First Lieutenant Posts: 10 Registered: 2/22/2008 Status: Offline |
posted on 2/29/2008 at 12:52, Reply 2 |
I tried connecting straight to the jack and there was no difference. It's
not like there is any unexplained buzzing, crackling or cutting in and out,
when I turn the amps volume up it sounds fine, but if I switch to the 490
rhythm pick up I accidently start an earthquake...
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brian
Moderator Posts: 1038 Registered: 12/22/2003 Status: Offline |
posted on 2/29/2008 at 12:58, Reply 3 |
ummm interesting. What kind of guitar? Did you change the pots,caps etc..
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Beng
First Lieutenant Posts: 10 Registered: 2/22/2008 Status: Offline |
posted on 2/29/2008 at 14:08, Reply 4 |
It's a 90's Epi Les Paul with a Gibson pickup upgrade (490R + 498T).
Yes, I've changed the cap (0.022uF) and volume and tone pots (500k) on the
bridge side in the process of trying to fix it.
I have no idea about how this would occur, but could demagnetisation be a
possible cause?
[Edited on 2/29/2008 by Beng]
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brian
Moderator Posts: 1038 Registered: 12/22/2003 Status: Offline |
posted on 2/29/2008 at 22:56, Reply 5 |
It's possible, but I have installed tons of pickups and never had this
happen. Did you take the humbucker apart? If so did you put the magnets
back in correctly.
It's alot easier If we could see and hear...
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Beng
First Lieutenant Posts: 10 Registered: 2/22/2008 Status: Offline |
posted on 3/1/2008 at 09:09, Reply 6 |
Something came to me last night when I was in bed at about 4:30am that I'd
completely forgotten about: just under two weeks ago, the volume dropped
low briefly, for a couple of seconds and then came back full again, this
happened twice, but I just blamed my less than mint effects pedal at the
time and carried on as normal and didn't think anymore of it. It wasn't a
crackly cut in sound like with a broken cable or jack, it was as smooth as
if a switch had been flicked.
As I've had the pickup wired direct to the jack during my troubleshooting,
it must be a fault in the pickup itself. Because the problem occured
permantly after I'd resoldered the ground jacket I naturally assumed my
dodgy soldering was somehow the cause, but I must have worsened the already
existing fault more by tugging on the wire.
The connection from one of the coils could be broken, that would explain
why it sounds at half volume... but then why would the meter still read
15.5k?
I'm going to have to open it up and have a look, any advice so I don't
cause any more damage? I'm going to have to take off a pickup cover, but
if I remember correctly, it's just soldered on at two points, so it should
be simple.
Maybe I can fix it after all...
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Beng
First Lieutenant Posts: 10 Registered: 2/22/2008 Status: Offline |
posted on 3/1/2008 at 10:09, Reply 7 |
I just removed the pickup from the guitar, the wiring looks very secure
from the outside.
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brian
Moderator Posts: 1038 Registered: 12/22/2003 Status: Offline |
posted on 3/1/2008 at 11:03, Reply 8 |
If your unsure I would take it a tech or try the warranty deal.
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Beng
First Lieutenant Posts: 10 Registered: 2/22/2008 Status: Offline |
posted on 3/1/2008 at 11:14, Reply 9 |
Yes, I thinks that's probably wise, I could make it worse.
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