Ginger come out where/ever you are !

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Author Message Fingersmcoy Username: Fingersmcoy Registered: 10-2006 Posted on Friday, November 17, 2006 - 9:09 pm:    Hey i still cant get that pickup to work! I replaced the pickups, replaced the toggle pickup switch.In the lead mode on toggle switch im gettin a hum,but no output.Whats next ? Could a trim pot vol. controll do this? All other modes work fine,just that one position.W.T.F.! Gemberbier Username: Gemberbier Registered: 05-2006 Posted on Saturday, November 18, 2006 - 6:41 am:    If someone put a lefthanded potmeter in it, 10=0. So if someone ordered the second potmeter in this list: http://www.ibanez.com/parts/2004_PARTS/el_guitar/index/index_parts.html and didn't read what's behind it (a lefthanded potmeter), your pot works the other way 'round. So the answer is: yes it could. Turn it to "0" and listen/measure what happens. But I still think you move to fast: - I still don't know what guitar you're talking about. - I still didn't see your 3 measurements through the guitar cable (neck, both, bridge). - I still didn't see the measurements of the disconnected pickups. Should be no problem now, since you took them out. I already wrote something in the original thread, but keep the possibility of the lefthanded potmeter in mind (assuming that your guitar is right handed). Ginger Fingersmcoy Username: Fingersmcoy Registered: 10-2006 Posted on Saturday, November 18, 2006 - 9:13 am:    Ok Wow i didnt realize that a left handed pot(if your serious) would make a difference!Just to let you know i replaced the humbucker pickup *bridge(8.45k ohms ) with a 13.something k ohms HOT.Would that Hot P/U some how- cancell out the neck pickup(57CH)(G)at about 8.45K ohms,because of the mismatch in ohms rating?? *I believe the neck P/U and bridge P/Us were of the same ohms ratings 8.45 Fingersmcoy Username: Fingersmcoy Registered: 10-2006 Posted on Saturday, November 18, 2006 - 9:23 am:    Oh i for got- its a Epiphone Les Paul limited Edition. Gemberbier Username: Gemberbier Registered: 05-2006 Posted on Saturday, November 18, 2006 - 12:59 pm:    Yes, I'm serious about the hypothetical problem of one (after market) left handed volume pot in a right handed guitar, or: one (after market) right handed volume pot in a left handed guitar. The problem would be, that you think all pots are open, but in reality one is closed. But, that's hypothetical. You asked if it's possible that one potmeter could cause this problem, and the answer is YES. A broken potmeter also could cause the problem, or bad / wrong soldering. Same goes for a bad wire or short circuit in the harness. If your pickups give normal ohm ratings once that they're out of the guitar, they are good. So the most expensive solution (a new pickup) can be excluded. That a 13.x KOhm humbucker would cancel out a 8.45 KOhm humbucker, is not likely. This happens only if the differences are very big (for instance a Maxon humbucker of 585 KOhm with a single coil of 3.2 KOhm would give some balance troubles: that's why I kicked the Maxon out of my Kasuga Tele Custom). If your pickups still give these measurements, they are OK and not the cause of the problem. That should be good news, 'cause they're the most expensive parts to replace. Can you make a pictures of all solderings and wire ends coming from the silent pickup and their next stations (switch, potmeters, output) and upload them? Greetz, Ginger Fingersmcoy Username: Fingersmcoy Registered: 10-2006 Posted on Saturday, November 18, 2006 - 4:11 pm:    Yes i could take pics.of the whole rig,but i dont know how to post them here.The next step will be cont. test w/ an analog meter. I tried it w/ my digital meter but its all over the place.The analog meter will help me see if the pots rise and fall smoothly. Thanks for your help Gemberbier Username: Gemberbier Registered: 05-2006 Posted on Saturday, November 18, 2006 - 6:43 pm:    Your digital meter is all over the place? That's a sign something is wrong with the resistance between + and - of the meter. Could be the measuring leads of the meter, but also the pot itself could be bad. If you put your meter on 20,000 KOhm, it may not give a higher value than let's say 550 KOhm. (That's a 10% deviation on 500 KOhm, which is rather high). That's the maximum resitance. The minimum resistance should be 0. If the resistance peaks far above 500 KOhm on the traject from 0 t0 500 and back, so high that the resistance is unmeasurably high for the range of 0-20,000 KOhm, you have a broken potmeter, and you should replace it. Also if the traject from 500KOm-0KOhm (positions 0-10) doesn't go not gradually, but with odd peaks, the pot is broken. If the leads of your meter are OK, it shouldn't make any difference, what meter you use. If you directly connect the red lead with the black lead, you measure the resistance within these leads, using the LOWEST resistance range of the meter. The resistance of the leads should be ZERO, also if you move the leads. If your meter gives various values, your measuring leads should be replaced. (Sometimes it is cheaper to buy a new cheap multimeter). If you have a good expensive brand (like Fluke), you buy new leads, of course. But if you trust the analogue meter better, that's OK. My dad also still uses his expensive old analogue meter. I buy meters in the supermarket for €3.- (cheaper than new leads). Measure about 20 positions from 0-10 on the pot (half steps). Write your results down on paper, and draw a graph on millimetre paper. The graph should be hyperbolic, since it is a logarithmic pot. For posting pics, use the search option with keyword "upload" and see what you find. JohnS recently updated his instructions, since we had some difficulties uploading pics. It's important to resize your pics to 50 KB max. Ginger Fingersmcoy Username: Fingersmcoy Registered: 10-2006 Posted on Saturday, November 18, 2006 - 10:12 pm:    I think your right about the meter thing.I tried both analog and digital.I guess its a preference thing.I just like to see the analog meter needle swing slowly when i rotate the pot.I think i found another problem w/ Epip.I searched the web and found a wiring diagram for the epip. toggle switch .I think someone wired the toggle switch wrong,inadvertently it may have been me !Tomorrow ill start again and try replacing the pick up again,and see if i can get- both pickups to work in all modes.If this dont work do you know any credible exorcists.This sucker has the wraith of the dreded "take the money and run e-bay seller" Gemberbier Username: Gemberbier Registered: 05-2006 Posted on Sunday, November 19, 2006 - 7:45 am:    Starting with measurements and a wiring diagram is the basics. It's were you come from and the destination. So, you're on the right track now. Don't move too fast. Think first. Ginger Fingersmcoy Username: Fingersmcoy Registered: 10-2006 Posted on Sunday, November 19, 2006 - 10:27 pm:    Problem solved Yey!It was the Toggle switch wired wrong.I just •••-umed that the toggle switch was bad,after 3 switches i should have known.I dont know how you knew but your right. I think i was trying to solve the problem in a hurry,and over looked the simple thing first.You might be a cyber psychic!Anyway thanks for all the helpful suggestions. Gemberbier Username: Gemberbier Registered: 05-2006 Posted on Sunday, November 19, 2006 - 10:39 pm:    You're welcome... Ginger

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