1983 musician wiring diagrams.

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Author Message Icyuod Username: Icyuod Registered: 06-2006 Posted on Friday, June 09, 2006 - 11:05 am:    i recently traded an 80's westone for this beast of a musician. as you can see it needs some serious tlc. the neck is straight and true, but the wiring's been hacked/chopped/left disconected. surprizingly enough, the bass still plays. i was hoping somebody could help with wiring diagrams for this model (still unsure which mc it is) any other info(not looking for value,but interesting facts,mods,replacement parts etc )on the bass would be greatly appreciated also. [IMG]http://i51.photobucket.com/albums/f382/icyuod2/IMG_8721.jpg[/IMG] [IMG]http://i51.photobucket.com/albums/f382/icyuod2/IMG_8715.jpg[/IMG] [IMG]http://i51.photobucket.com/albums/f382/icyuod2/IMG_8717.jpg[/IMG] thanks leigh Icyuod Username: Icyuod Registered: 06-2006 Posted on Friday, June 09, 2006 - 4:14 pm:    hey johns, for some reason your post isnt showing up on my computer. Johns Username: Johns Registered: 02-2001 Posted on Friday, June 09, 2006 - 5:47 pm:    Leigh: that's because I deleted it. I asked about the serial number, but then saw you included the year of the bass in the title of the thread. Is this a US or European bought guitar? Johns Username: Johns Registered: 02-2001 Posted on Friday, June 09, 2006 - 6:21 pm:    Leigh: Looks like an MC924 in Polar White. It has what they call the 3 Band EQ-B Tone system. BTW, it looks like some of the knobs are on the wrong controls. Here's a picture from the '82 catalog: Basically a 3 band EQ, like they used in the guitars (AR500s). It will take a little more digging to find more details, like a wiring schemaic. Icyuod Username: Icyuod Registered: 06-2006 Posted on Friday, June 09, 2006 - 6:38 pm:    thanks john. i've been searching for wiring diagrams all day. nothing yet.lol Phatphred Username: Phatphred Registered: 03-2006 Posted on Saturday, June 10, 2006 - 6:36 pm:    Does this help? It's from Jim Donahue's noahjames site, so maybe you've already seen it? http://www.noahjames.com/vintagepage/mc924.jpg The row of letters and numbers is for the contacts on the harness as they join the PCB The numbers should be visible on the underside. It works fine for my 1984 MC924DS (with the P & J type pickups). Perhaps an inquiry from Jim under his specific topic on this site could yield more specific details or a better diagram but be patient, he's a busy man! Phatphred Username: Phatphred Registered: 03-2006 Posted on Saturday, June 10, 2006 - 7:27 pm:    Leigh, I've looked a bit more into this, and opened up my bass and I'm now tending to the view that the electronics you have in your pic are non-standard and possibly not Ibanez at all. This looks like some third-party eq circuitry and the pot value of 500K is wrong for an Ibanez eq circuit. There should be 3 pots, each of 20KG type nearest the edge of the guitar. The "G" refers to an unusual taper, with a graph like an "S" on its side, and they have a centre detent. The original pots provided boost and cut of 15 or 21 dB, I'm not sure which. As a PCB is going to be hard to find and expensive, you might consider replacing the circuitry with a different third-party set of guts, at least while you search for the PCB and the proper pots. If you follow the thread about replacement eq knobs, you might also find a source for NOS pots, but that would be between you and Yogi. My 1984 guitar has a PCB which was a common variant, having two shorter wiring harnesses, one at each end, but as far as I know, still using the same number/letter sequence for the connections as in the diagram linked in the last posting. Good luck! Lesliegl Username: Lesliegl Registered: 03-2005 Posted on Sunday, June 11, 2006 - 12:09 am:    This is an option....if i couldnt get the original parts id look into getting a three band bartolini bass preamp ..wire the original pick ups to it... they have one with a mid shift toggle switch which could be used in the eq on off swith position of the original bass..... i hope u can get the original stuff tho'.. best of luck Leslie Icyuod Username: Icyuod Registered: 06-2006 Posted on Sunday, June 11, 2006 - 8:30 am:    if you guys dont mind, i have a few more questions. first i'd like to thank you all for being so very helpful. you guys are correct. only 3 of the 6 pots are original to the guitar (the 3 500k pots including the daul pot) the original circuit board is missing and its been replaced with a g&l pre amp. the preamp is wired to 3 new 500k pots. [IMG]http://i51.photobucket.com/albums/f382/icyuod2/IMG_8733.jpg[/IMG] [IMG]http://i51.photobucket.com/albums/f382/icyuod2/IMG_8732.jpg[/IMG] i have alot of bass guitars. lado,godin,vantage,westone,brawley,4 fenders 3 music masters-1978- one orig (with a 6 post guitar pickup-one way of preventing guys buying the cheaper short scale bass and ripping the pickup out of it for thier jazz bass guess it was an issue back in the day. 1 with a semour 1/4lbs'r still have the orig pu, and a very cool custom carved master in the works-you'd have to see it to believe it)a 1992 mb4 and the list goes on. none of these guitars use a 6 pot system. would you guys mind giving me a quick overview, of how the system works? its alot of pots, kinda makes my head spin ok so the search is on for replacement parts. i'd like to get originals, but if i cant, what are the modern options, that will closely simulate the original tones? will i be able to use all six pot? thanks guys for all the help, you've been very helpful. Icyuod Username: Icyuod Registered: 06-2006 Posted on Sunday, June 11, 2006 - 8:31 am:    btw whats the deal with the g&l preamp. garbage? or worth keeping? Icyuod Username: Icyuod Registered: 06-2006 Posted on Sunday, June 11, 2006 - 4:11 pm:    well im sure this is going to strike a sour note with some of you, but lets face it. this bass will never be a prize collectable piece. its a player.paint,tunners,bridge are too far gone to save. (pitted badly, but i have a friend thats going to replate them after alittle clean up.) serious buckel rash, chips ,dings leaking battery acid and scratches were some of the reasons i stripped the guitar. however, the polar white turned urine/tabbaco yellow, was the main reason. some real cool wood under this tacky 80's paint job. its starting to look alot like my medallion. cant wait to get it back in the spot light again. i even managed to save the ibanez logo. [IMG]http://i51.photobucket.com/albums/f382/icyuod2/IMG_8743.jpg[/IMG] [IMG]http://i51.photobucket.com/albums/f382/icyuod2/IMG_8744.jpg[/IMG] no power tools on this puppy, i striped the clear coat with a heatgun and block sanded from there. its taking alittle longer than expected, this white paint is tough as nails. the end result will be well worth the effort. Phatphred Username: Phatphred Registered: 03-2006 Posted on Monday, June 12, 2006 - 7:59 pm:    20kg pots and non-stock excellent replacement knobs are out there now from this ICW member seller! http://www.qksrv.net/click-1802666-10381315?loc=http://cgi.ebay.com/ws/eBayISAPI .dll%3FViewItem%26item%3D7422210310 Lesliegl Username: Lesliegl Registered: 03-2005 Posted on Tuesday, June 13, 2006 - 12:37 am:    20 k pots ..?? they would have to be low impedance for active pick ups wouldtnt they ?? thats what emgs actives use.. Leslie Icyuod Username: Icyuod Registered: 06-2006 Posted on Tuesday, June 13, 2006 - 1:04 am:    thats what the wiring diagram calls for. http://www.noahjames.com/vintagepage/mc924.jpg thanks!

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