I did check everything obvious. I've tried the unit without anything
hooked up to it, no difference. I'll try running it sans-synth card
and see if that has an effect. I've got an e-mail into yamaha
service, I'll see if they can send me a svc manual. Though I hate the
idea of troubleshooting and replacing tiny surface-mount
components... I just bought this thing, and the PO refuses to return
my emails.
I thought I'd be better off buying locally, but I guess it's best to
stick to ebay where you at least have feedback to check a seller's
integrity. I just wish I'd have gotten this guy's contact info so I
could trek out to his house for an up-close and personal chat... (and
perhaps a little violence!)
n8
--- In AN1x-list@yahoogroups.com, "Dale Kay" <admin@k...> wrote:
> guessing something is drawing more power like you noticed.. it may
be beyond simple fixes, take to repair place.
>
> Otherwise, you will have to dig in. You will need a service manual
and some equipment to check it out. Most in this area charge $45 an
hour or so, unit is worth? Hard call, I know I be digging in on it
but there is a tie where even I would either give to someone with a
service manual or buy another.
>
> One idea I would do, (note I said " I ", may not be for you), pull
the synth board out, power it up and see what it does. I read in a
few posts that the unit works with the board out as a midi
controller/sequencer.
> All that will tell you is, if it starts to behave right, the synth
card is pulling in the power, as that is what I am thinking, a big
draw... all guess work without seeing the unit and knowing the
service manual.
>
> Review the cost to repair to a used one.
>
> You did say for a while there you did use a 9 volt power supply and
not the 12. There is a chance that the lower supply may have damaged
the unit over time.
>
> All I said was basic electronic TS stuff... if you can review the
service manual, there might be some clear notes in there that mention
this type of failure.
>
> I asked about the cables in case of a floating ground, bad plug in
the unit shorting out etc. Thought it best to ask if you gave it a
try with all removed other than power. Wasn't if Jon that asked if
the power plug was tight? I am sure you checked that too right?
>
> dale
>