Author Topic: Wiring Diagram for 18volt Aria Pro II RS-850?  (Read 249 times)

Football

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Wiring Diagram for 18volt Aria Pro II RS-850?
« on: December 28, 2017, 08:46:14 PM »
Having problems with the electronics in this guitar.  Neck pickup not working on it's own at all when selected.  It only works when pickup selector switch is set to neck + bridge.

There's also a bunch of intermittent noise gremlins coming and going.

Not sure where to begin cause it's very tight quarters, tons of electronics in the cavity and not what I’m used to seeing, coming from basic strat assemblies.

Electronics are Alembic-ish, at least in some ways, IMO. Two single coil style pickups with a dummy coil in between them. Also has three way "Q-Switch".

Searched online for diagram but came up with nothing.  Guitar is from 1979. Made for three years, I think.  Came here because I’ve seen threads here about this model in the past.

Hoping someone may have some ideas.

Thank you
ps. If this post should not be on the forum, since it's not an Alembic guitar, please delete.

lbpesq

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Re: Wiring Diagram for 18volt Aria Pro II RS-850?
« Reply #1 on: December 29, 2017, 08:27:02 AM »
Hi, Brian.  No problem posting, though this might more properly belong in the "miscellaneous" section.  (If so, the moderators will move it - again, no problem).  Which version of the Aria do you have, the 6-in-line or the 3+3 headstock?  I have one of the 6-in-line 850s.  If the neck pickup works in the middle position, but not in its own, I would suspect the PU selector switch.  You can test this by bypassing the switch.  Also, if you think it would help, I can open mine up and take some pics.  Not sure what you mean by "intermittent noise gremlins".  Do the gremlins just happen on their own, or do they appear when you are turning the control knobs?    If the latter, you need to "exercise" the pots - turn them 0-10-0, back and forth 40 or 50 times each.  If the gremlin noises just happen on their own, the first thing I would do is put in fresh batteries.

Biil, the guitar one
« Last Edit: December 29, 2017, 11:07:08 AM by lbpesq »

Football

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Re: Wiring Diagram for 18volt Aria Pro II RS-850?
« Reply #2 on: April 07, 2018, 05:53:17 PM »
Thank you so much for the reply.  So sorry for the extremely long delay in responding.  Didn't realize there was any response here.  Must have the wrong settings for getting notified when someone corresponds to a post.

Anyway, brought the guitar to two places since then to repair.  Neither one could figure out the noise problem.  Did have the pickup selector switch changed out.  Now all the pickup selections are working (bridge alone, bridge + neck, neck alone).

Have gone through the guitar myself and touched up old solder joints.  Thinking it's likely a problem with the board, which is unfortunately both enclosed and gooped with what seems to be epoxy.  Found a guy online who seems to have some experiencing de-gooping boards.  Will likely send the guitar to him soon.

Have also seen a You Tube video of someone else with this same guitar/same problem.

Noises are most obvious with overdrive/distortion.  Happens on Neck + Bridge, or Neck alone.  Think I made a basic video showing the noise.  Have to see if I can find it.

My Aria is the same as yours.  6 in line.  Don't think the noises are related to the pots being dirty.  Have put in fresh batteries, and changed the battery terminals as well.  The noises just happen on their own with no changes when using the volume or filters.

Sorry for the long post.  Thank you very much for the help.

lbpesq

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Re: Wiring Diagram for 18volt Aria Pro II RS-850?
« Reply #3 on: April 07, 2018, 06:29:09 PM »
Brian, can you post a link to the youtube video demonstrating the problem?

Bill, tgo

Football

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Re: Wiring Diagram for 18volt Aria Pro II RS-850?
« Reply #4 on: April 07, 2018, 06:32:36 PM »
Here is a video I made a while back to show a guitar tech friend.

https://youtu.be/5sX4QOQ-Ffs