• Yahama APX 6 pre Amp.

    From ilcaccillo@gmail.com@21:1/5 to All on Tue Dec 20 17:13:38 2016
    sexta-feira, 24 de Janeiro de 2003 às 23:12:31 UTC, Tony D. escreveu:
    I have this yahama APX 6 Guitar, about 10 years Old. I thing this
    Guitar sat longer than it was played. It still in pretty nice shape
    , But there is no signal out of the jack.
    I had an experienced luthier, (Mike Pellow, Pittsburgh PA) look at it today.
    He had said it was probley the input jack, or the battery connector
    Clip.
    He looked at it for about an hour today and said the Jack checked
    out ok, (he removed the old one and replaced it with a known good test
    Jack) and "bypassed" the battery connector clip. These checked out ok.
    When he plugged it into the Amp, it made a clicking noise, and he was Strumming the strings and tapping on the pickup.
    He stated, "since the APX 6 has 2 pickups, the chances of both of
    them being bad is very slim, so it would almost have to be the
    Electronics in the pre-amp
    or possibly, (but he really didn't think so) one of the "multi pin
    connector wires" and I would have to look onto finding a pre amp for a
    yahama 0r someone to repair this one, As he could not get Yahama
    Parts. I removed the pre amp assembly myself and looked over all
    the wires and the soldered points and all looked OK as far as I can see.
    I spoke to a Tom At Yamaha in California (repair tech) and he stated
    That the only thing they have is an IC chip, (about 24 pin I think it
    is)but that is what has always been wrong with the pre-amp.(Part #
    VI750602). But they want like $178.00 retail just for the chip. I
    would have to solder it in my self, or get someone to do It. (I have a
    guy that repairs MAC machines that can R&R it for me)
    Does any one know of any other options (less money, less hassle?
    Etc.) That I might have. I would prefer not to use a dean markley type
    Of pick up, as I need to be able to control the volume and tone at the guitar.
    I hate to just let this guitar sit, as it is still in pretty good
    shape. (Mike said the rest of the guitar was in good shape!!)
    Should I modify the body a little and put a different pre amp in.
    If I do this will I just be able to use the 1 pick up? (there is a
    balance pot wired into the system.) Or is there any kind of after
    market pre amp that will fit right in? (Snowball in Hell?)
    Thanks Guys, Tony D.


    I see this message is from 2003,
    but it is the answer for future Yamaha APX6 users having the same preamp problems.

    here you have a pdf guide to be able to repair your APX6 preamp:

    https://drive.google.com/open?id=0B-8-tjpvVqN-NG9MNEFMOWVoRzA

    and here a photo for quick reference:

    http://i1124.photobucket.com/albums/l579/ilcaccillo/Yamaha%20APX6%20Preamp%20-%20IC1%20Electrolytic%20Capacitors%20Repair.png

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  • From fernando herrero@21:1/5 to ilcac...@gmail.com on Wed Feb 3 02:44:03 2021
    On Wednesday, 21 December 2016 at 01:13:39 UTC, ilcac...@gmail.com wrote:
    sexta-feira, 24 de Janeiro de 2003 às 23:12:31 UTC, Tony D. escreveu:
    I have this yahama APX 6 Guitar, about 10 years Old. I thing this
    Guitar sat longer than it was played. It still in pretty nice shape
    , But there is no signal out of the jack.
    I had an experienced luthier, (Mike Pellow, Pittsburgh PA) look at it today.
    He had said it was probley the input jack, or the battery connector
    Clip.
    He looked at it for about an hour today and said the Jack checked
    out ok, (he removed the old one and replaced it with a known good test Jack) and "bypassed" the battery connector clip. These checked out ok. When he plugged it into the Amp, it made a clicking noise, and he was Strumming the strings and tapping on the pickup.
    He stated, "since the APX 6 has 2 pickups, the chances of both of
    them being bad is very slim, so it would almost have to be the
    Electronics in the pre-amp
    or possibly, (but he really didn't think so) one of the "multi pin connector wires" and I would have to look onto finding a pre amp for a yahama 0r someone to repair this one, As he could not get Yahama
    Parts. I removed the pre amp assembly myself and looked over all
    the wires and the soldered points and all looked OK as far as I can see.
    I spoke to a Tom At Yamaha in California (repair tech) and he stated
    That the only thing they have is an IC chip, (about 24 pin I think it is)but that is what has always been wrong with the pre-amp.(Part # VI750602). But they want like $178.00 retail just for the chip. I
    would have to solder it in my self, or get someone to do It. (I have a
    guy that repairs MAC machines that can R&R it for me)
    Does any one know of any other options (less money, less hassle?
    Etc.) That I might have. I would prefer not to use a dean markley type
    Of pick up, as I need to be able to control the volume and tone at the guitar.
    I hate to just let this guitar sit, as it is still in pretty good
    shape. (Mike said the rest of the guitar was in good shape!!)
    Should I modify the body a little and put a different pre amp in.
    If I do this will I just be able to use the 1 pick up? (there is a
    balance pot wired into the system.) Or is there any kind of after
    market pre amp that will fit right in? (Snowball in Hell?)
    Thanks Guys, Tony D.
    I see this message is from 2003,
    but it is the answer for future Yamaha APX6 users having the same preamp problems.

    here you have a pdf guide to be able to repair your APX6 preamp:

    https://drive.google.com/open?id=0B-8-tjpvVqN-NG9MNEFMOWVoRzA

    and here a photo for quick reference:

    http://i1124.photobucket.com/albums/l579/ilcaccillo/Yamaha%20APX6%20Preamp%20-%20IC1%20Electrolytic%20Capacitors%20Repair.png

    Hi

    I have been looking for you PDF file to repair my Yamaha APX- 6N and the link does not work. The guitar is lovely and it would be almost disrespectful not to repair it. Would you mind sending me an email to drfherrero@gmail.com

    Thanks
    Fernando

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  • From Nick Odell@21:1/5 to drfherrero@gmail.com on Wed Feb 3 17:40:27 2021
    On Wed, 3 Feb 2021 02:44:03 -0800 (PST), fernando herrero <drfherrero@gmail.com> wrote:

    On Wednesday, 21 December 2016 at 01:13:39 UTC, ilcac...@gmail.com wrote:
    sexta-feira, 24 de Janeiro de 2003 s 23:12:31 UTC, Tony D. escreveu:
    I have this yahama APX 6 Guitar, about 10 years Old. I thing this
    Guitar sat longer than it was played. It still in pretty nice shape
    , But there is no signal out of the jack.
    I had an experienced luthier, (Mike Pellow, Pittsburgh PA) look at it
    today.
    He had said it was probley the input jack, or the battery connector
    Clip.
    He looked at it for about an hour today and said the Jack checked
    out ok, (he removed the old one and replaced it with a known good test
    Jack) and "bypassed" the battery connector clip. These checked out ok.
    When he plugged it into the Amp, it made a clicking noise, and he was
    Strumming the strings and tapping on the pickup.
    He stated, "since the APX 6 has 2 pickups, the chances of both of
    them being bad is very slim, so it would almost have to be the
    Electronics in the pre-amp
    or possibly, (but he really didn't think so) one of the "multi pin
    connector wires" and I would have to look onto finding a pre amp for a
    yahama 0r someone to repair this one, As he could not get Yahama
    Parts. I removed the pre amp assembly myself and looked over all
    the wires and the soldered points and all looked OK as far as I can see. >> > I spoke to a Tom At Yamaha in California (repair tech) and he stated
    That the only thing they have is an IC chip, (about 24 pin I think it
    is)but that is what has always been wrong with the pre-amp.(Part #
    VI750602). But they want like $178.00 retail just for the chip. I
    would have to solder it in my self, or get someone to do It. (I have a
    guy that repairs MAC machines that can R&R it for me)
    Does any one know of any other options (less money, less hassle?
    Etc.) That I might have. I would prefer not to use a dean markley type
    Of pick up, as I need to be able to control the volume and tone at the
    guitar.
    I hate to just let this guitar sit, as it is still in pretty good
    shape. (Mike said the rest of the guitar was in good shape!!)
    Should I modify the body a little and put a different pre amp in.
    If I do this will I just be able to use the 1 pick up? (there is a
    balance pot wired into the system.) Or is there any kind of after
    market pre amp that will fit right in? (Snowball in Hell?)
    Thanks Guys, Tony D.
    I see this message is from 2003,
    but it is the answer for future Yamaha APX6 users having the same preamp problems.

    here you have a pdf guide to be able to repair your APX6 preamp:

    https://drive.google.com/open?id=0B-8-tjpvVqN-NG9MNEFMOWVoRzA

    and here a photo for quick reference:

    http://i1124.photobucket.com/albums/l579/ilcaccillo/Yamaha%20APX6%20Preamp%20-%20IC1%20Electrolytic%20Capacitors%20Repair.png

    Hi

    I have been looking for you PDF file to repair my Yamaha APX- 6N and the link does not work. The guitar is lovely and it would be almost disrespectful not to repair it. Would you mind sending me an email to drfherrero@gmail.com

    Thanks
    Fernando

    Would this be of any use to you? https://www.manualslib.com/manual/431399/Yamaha-Fg411sce.html#manual
    (The link says FG411 but the manual covers many Yamaha models
    including APX 6)

    Nick

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