Xpantastic!

Have you tried the DAC Mono test in the service Page ?. If you get a 
bleep , can you count period between the bleeps . Do you get no 
bleeps or an almost constant tone ?. If you get no bleeps , it may be 
the PSU , new caps , diodes etc. Fingers crossed it's not the DAC!

Phil. 




--- In xpantastic@yahoogroups.com, "Tony Cappellini" <cappy2112@...> 
wrote:
>
> It looks like I won't need to do an A/B comparison with Jeremy's 
wave file,
> I can easily hear now that my Xpander is not working well.
> 
> Prior to this and the reason I had posted a message looking for 
someone
> local to the SF Bay Area was that only on 1 patch did my Xpander 
sound very
> bad.
> 
> I had found one voice which was flaky, so I turned it off.
> 
> Recently, I happen to hit several keys at once and could hear the 
vcos being
> grossly out of tune.
> 
> After trying to tune everything, I get FAIL across the board.
> 
> In the past, when I would see FAIL after running autotune, I would 
wait 30
> min, run it again and all tests would pass. This is not the case 
now.
> 
> 
> Fortunately, I've got a few spare CEMs which I hope are all 
working, that I
> can use to troubleshoot with.
> 
> I haven't looked at the service manual in years- I hope there are 
some
> measurements I can make with a voltmeter to give me some ideas.
> 
> I can probably borrow a scope to check for ripple on the output of 
the PS
> but don't really know how much ripple would be excessive for the XP 
PS.
> 
> All other front panel functions & midi appear to be working 
normally, so
> it's probably not likely to be a PS issue.
>