The Yamaha AN1x Synthesizer mailing list

> Thanks, I tried the diagnostic. The scene lights don't
> turn on and the buttons don't respond to the keypress.
> I tried the factory resest again and still nothing. I
> suppose my next stop is surgery. Anything I should
> know before I go poking around in there?
> 

Before you start, you may want to pick up a NEW CR2450 Battery and 
replace it while your at it.

I've got one open now.  First off.  Get some damp bath towels to lay 
the synth upside down on.  A quick and diry way to get one damp is to 
throw a clean bath towel in the dryer and toss in a clean WET wash 
cloth and tumble for a few minutes.

Work in bare feet on a wood floor -- no socks anyway.

Pull the volume knob stright up and off.  Lay the Synth down with the 
back of the facing you, take the the two dozen or so screws on the 
bottom and remove the cover.

The circuit board you are looking for will be on your far left close 
to you.  Remove the four screws holding down and carfully wiggle it 
up and out.  Put a hand under to push a little on the volume control 
shaft.  Be carefull as the LED's need to come up out of their holes.

Flip it over.  There is one connector, and a punch down block.  It 
looks like it is the punch down block where the connections could be 
loose.  If things look OK, take a pen knife or use the BACK edge of a 
razor knife and gently press the wires into the connector notches.

This may do it.  While your at it, go over all of the accessable 
screws and give them a twist if loose.  Many are the ground rail for 
the PC boards.

If that does not do it, those leads lead to a Relay Board under the 
Main System board.  Wires could be loose there on a similar 
connector, or there could be bad relays -- not too likely.  Still, 
most likely a loose connector.  Getting under the system board is a 
bigger job.  Go slowely and don't drop any tools on any thing.

Good Luck...............

Peter