SB70 wiring diagram needed

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Author Message Psibernaut Username: Psibernaut Registered: 10-2006 Posted on Wednesday, October 04, 2006 - 12:15 am:    Can you help? I had to get my SB70's toggle switch repaired (not the pickup selector, the little chrome one) but now I've lost some sounds. :-( I used to be able to get 2 sounds in each position of the 3-way pickup switch by toggling the other switch. Now I can only get: Neck / Both in phase / Both out of phase / Bridge. The thin sounds I used to get in the neck and the bridge selector positions are not available since the repair. I assume the guy has altered the wiring and/or used a different type of switch. I don't fancy letting him mess with it again. :-( Gemberbier Username: Gemberbier Registered: 05-2006 Posted on Wednesday, October 04, 2006 - 1:50 pm:    Dear Psibernaut, The Captain's on his honeymoon, so if you want an answer from him personally, you'll have to patient. You're being more specific here, than in the other threads. Thin sounds indicate that the toggle switch was originally used to split the humbucker in order to get a single coil sound. The option "in phase/out of phase" is nice too. It's just what kind of toggle switch you use and how you solder the leads. You say you lost some sounds, but you gained some too. It's just what you prefer. If the leads were hanging loose from the switch, the repairman wasn't able to test it in the original condition and had to depend on you for information. What did you tell him? Just to fix it? I bet that, if he can solder an "in phase/out of phase" switch, it wont be a problem to solder a "single coil/humbucker" splitter. If he's a professional, he'll appreciate it, when you give him a second chance WITH specific instructions, instead of telling everybody that he's no good and that you don't trust him with your guitar anymore. Communicate WITH him NOT ABOUT him! Ask him, whether he needs a wiring diagram, to get it the way you want, or if he can do without it. (As I said, I will keep looking for a one for you, because it's always nice to have one). Tip: When he opens it up, stay with him. Look and learn! Ginger Gemberbier Username: Gemberbier Registered: 05-2006 Posted on Wednesday, October 04, 2006 - 3:00 pm:    As you already know, the SB is not in the official 1982 catalogue, because it was a combination of an ST (STudio) body and a BL (BLazer) neck. Here is a special 1982 catalogue of these two models: http://www.t3-kundenserver.de/htmlpages/redasys/_core/databases/t_meinl-uploads/ 1982_bl_st.pdf If you look at the ST60 and ST80 you see the hardtail strat-like bridge. And if you read the description of the electronics of the ST80 and ST90 you see that they both have two volume pots and one PHASE switch. In the SB70 they didn't dril the extra hole, but they used the fourth pot hole for the toggle switch and a master volume pot (if that's original: could have been a master tone pot too). It is possible that the toggle switch was originally a phase switch, or that your repairman thought it was, because of his knowledge of these ST80 specs. It is possible that the former owner changed it into a coil splitter, but didn't solder it well. But for the moment that's guessing: the best thing to do is contact other owners and ask what the function of their toggle switch is, before you start changing it back to coil splitter again. At the moment I'm not convinced that coil splitters were originally on it. Ginger Psibernaut Username: Psibernaut Registered: 10-2006 Posted on Thursday, October 05, 2006 - 8:39 am:    Hmmm... The old switch was a little worn and would cut out now and then. I simply asked him to replace it. I didn't mention anything about altering the wiring. It was a more versatile instrument with the extra sounds and I much preferred it that way. In my original post I described the sounds I used to get. Please see: http://www.ibanezcollectors.com/discus/messages/12/19003.html?1160000399 Although it's not apparent from the pictures I posted, my guitar has a single volume pot and two tones. The bridge looks like the one on the BL100TV or BL170TV. It's not as chunky as any of the ST models. The neck is a Blazer neck for sure. The pickups look like the ones on the ST1200 which makes them Super 70s (obviously there aren't so many though!), in that they are cream coloured not black and cream. It appears the SB70s were not simply a bolt-together job then but used quite a mixture of ST and Blazer parts. Seems I have a bit of a mongrel guitar here. It might not be built to original SB70 specs. :-S Thanks very much for the catalogue by the way! Great to see those guitars! I hadn't done any mods to the guitar since I got it. I am certain about having the other two sounds. Any info at all about how one switch could affect both pickups to give that result is most welcome! Could a series/parallel arrangement be done that way with a single switch? Many thanks for your help with this, Ginger! Psibernaut Username: Psibernaut Registered: 10-2006 Posted on Thursday, October 05, 2006 - 10:48 am:    Hi Ginger, Thanks for taking the time to explain stuff to me and for sending me link to the Blazer/ST catalogue. I really enjoyed looking through that. :-) It seems my switch was wired to do coil-tapping when it first came into my possesion. Now that I know what to ask for I can easily get it put right. Psibernaut Username: Psibernaut Registered: 10-2006 Posted on Thursday, October 05, 2006 - 10:58 am:    Beg your pardon... coil splitting. Psibernaut Username: Psibernaut Registered: 10-2006 Posted on Wednesday, March 14, 2007 - 2:59 pm:    Well... I'm still trying to find a wiring diagram for my SB70. My problem is with the small switch, not the pickup selector. It's been replaced but I've lost some sounds. I've had a look at the original switch and it's a two position toggle with 6 terminals. It's wired like this: 0\ /0 0 X 0 0/ \0 i.e., the top left pin is wired to the bottom right pin; the top right pin is wired to the bottom left pin. On one side of the switch the rows of pins are marked like this: 0\ /0 ON 0 X 0 - 0/ \0 ON I assume that minus sign means "OFF" but I might be wrong. So, what did this switch do? It looks like a phase-reverse (i.e., neck and bridge pickups in/out of phase with each other) but I distinctly remember getting two different sounds at each position of the pickup switch. Could faulty wiring of the small switch cause this? If so what would the effect be, because I want it back? Does anyone have an SB70 that they can take the back-plate off and take a photo of the wiring? Thanks to everyone who's helped me so far. I appreciate all the help and advice. I just want to be sure to get the guitar wired up the way I lked it. Right now I'm not certain how that was. Regards, psibernaut >;-)

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