[sci.electronics] CBD-650 Malfunction

mcintyre@cs.rpi.edu (David McIntyre) (09/17/89)

I have a 2 year old CDB-650 cd player, with a few mods, including the
Audio mods, and part of the Audio Amateur Mods.  It has worked
flawlessly, never having a single tracking problem.

I leave the cd player and my amp (an Adcom 555) on all the time,
except for times when I will be away for more than a day or so.
The pre-amp is just a passive volume/balance box I made with 
premium components.

This morning I put a cd in the player, hit the PLAY button, and
only clicks and pops came out of the speakers.  It was a new cd,
so I thought "oh, I finally got a bad cd!", so I put an old,
reliable cd into the player.  The same bad sounds came out.

Well, I unplugged the rest of the stereo and listened through the
headphones.  Same bad sounds.

I have opened it and looked at the boards; nothing looks amiss.  I
was hoping for an obviously blown part but no such luck.

I have the service manual, but most of the test points require 
a scope and logic probe -- that is the next step.

Does anyone have know what could cause this problem?  What steps
should I take to isolate the problem?  Help me, please!!  I am
a poor student, and I will not be able to hire a real, expensive
service man.
			Thanks,
			   Dave

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