Emax

Let me make sure I understand you correctly:

What you describe is one test: checking that the 2300s are getting the correct voltage from the 5v supply? And I should be getting +/- 12V and ground? Are there testpoints visible or is it pretty obvious where to test it?

Thanks for the quick reply


--- In emax@yahoogroups.com, "jammie" <jammie.emma@...> wrote:
>
> check the 5 v supply as this is the control voltage of the filters 
> 
> the cv control gets sent to 1 of the 2300 for fc 1 for resonance 1 is for the vca and thhe other is for the dacs for the 8 note polyphony each octal sample and hold circuits for each of the functions 
> 
>  check to see that you are getting the corect voltage for operation of the 2300 or 4051 or smp08
> 
> if i was to change them then i would upgrade them to the newer faster slew rate the smp08 are the best and are from analog devices and are direct replacements for the ssm2300 which are 4051 equivelents made by emu
> 
> the smp08  they have a faster slew rate and have faster transient response with less distortion 
> 
> 
> you should be getting 12vdc vdd and grnd
> 
>   ----- Original Message ----- 
>   From: preslavl 
>   To: emax@yahoogroups.com 
>   Sent: Friday, February 05, 2010 5:54 PM
>   Subject: [emax] Emax Problem Diagnosis
> 
> 
>     
>   Hello,
> 
>   I wanted to see if I can get some help diagnosing the problem(s) of an Emax I i just purchased.
> 
>   Here are they symptoms:
> 
>   - No Frequency Cutoff - I calibrated the data slider and it registers the frequency cutoff (FC) going up in numbers but you cannot hear any change.
> 
>   - No Attack in the ADSR or the filter ADSR - cannot hear an increase in attack even when the values increase.
> 
>   - No Volume - volume slider was calibrated and it seems to work but moving it up or down does not make a difference...volume seems to be at 100%. 
> 
>   These are pretty much all the symptoms I've notices so far. 
> 
>   Things I've covered so far:
> 
>   - I replaced the 4 SSM 2300 that were in the sampler - it did not seem to make ANY difference. I replaced the original chips with ones marked: "SSM2300 8652". I purchased these on eBAY. Could this be the issue?
> 
>   - I went through the recalibration procedure - no change.
> 
>   - I performed the diagnostic tests inside the Master menu (8, 8, YES). ERAM and Bank RAM checked out OK and all other tests seemed to have passed. 
> 
>   Any ideas anyone?
> 
>   Thank you,
> 
>   Preslav
> 
> 
> 
>   
> 
> 
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