Emax

no pins 8 +10v
pins 4 -12v  are of off the tl082 ic41

pin 3 gnd
pin 14 +5v are from the ic49 ad7524

i said use pin 3 ground as your reference ground for testing the pins on the 
tl082

pin 3 on the ssm2300 is the cv voltage check this to see if you are getting 
the cv 0-5v

the rest of the pins  for the ssm2300 are correct
----- Original Message ----- 
From: "Preslav Lefterov" <plefterov@...>
To: <emax@yahoogroups.com>
Sent: Saturday, February 06, 2010 8:14 PM
Subject: Re: [emax] Re: Emax Problem Diagnosis


> Jammie,
>
> Ok let me run through this stuff and make sure I understand correctly (I
> should be able to do all the tests later today or tomorrow):
>
> 1. SSM2300s are fed by the *74HCT273* latching circuit. Is this the name 
> of
> the actual circuit as per the schematics or is it a specific IC or other
> component?
>
>
> 2. I need to check the following pins on *IC49 (AD7524): *
> *
> ----> pin 8 should be +10V
> -----> pin 4 should be -12V
> -----> pin 3 is GROUND
> -----> pin 14 should be +5V
>
> 3. I need to check the following pins on IC41 (tlo82):
> -----> pin 1 should be 0-5V (this is the output to all SSM2300s)
>
> Which pin on IC41(tlo82) is GROUND?
>
> 4. I need to check the voltages on these pins on all SSM2300s:
>
> ----> pin 7 should be -5V
> ----> pin 8 is GROUND
> ----> pin 16 should be +10V
>
> 5. ICil327 is the -5V regulator, so if I am nto getting this voltage to 
> the
> SSM2300s I can try replacing this?
>
> 6. Transistor TIP29 / QQ306 is the +10V regulator. It is attached to a
> heatsink ZE323. If I am not getting +10V I can try replacing this
> transistor?
>
>
> Just wanted to summarize your instructions. I will check all this stuff as
> soon as I get to the studio (there is a snowstorm here and my car is stuck
> currently).
>
>
> Thank you for guiding me through this again.
>
>
> Preslav
>
>
>
> *
>
> On Sat, Feb 6, 2010 at 10:26 AM, jammie 
> <jammie.emma@...>wrote:
>
>>
>>
>> the -5v regulator is ic il327
>>
>> the tip29 npn power transister does the 10v it is qq306 it is attached to
>> t0-220 heatsink ze323
>>
>> ----- Original Message -----
>> From: "Preslav Lefterov" <plefterov@... <plefterov%40gmail.com>>
>> To: <emax@yahoogroups.com <emax%40yahoogroups.com>>
>> Sent: Saturday, February 06, 2010 1:35 AM
>> Subject: Re: [emax] Re: Emax Problem Diagnosis
>>
>> > Thanks for your help. Here are the readings:
>> >
>> > OR/GR = 12.48V
>> > YE/GR = 5.0V
>> > PU/GR = 12.18 (if i measure with red probe on green wire and black 
>> > probe
>> > on
>> > the purple) or -12.18V (if I measure with the red probe on the purple 
>> > and
>> > black probe on the green)
>> >
>> > The floppy drive works perfectly...it loads the OS and and
>> > samples/presets.
>> >
>> > I appreciate your time.
>> >
>> > Preslav
>> >
>> > On Fri, Feb 5, 2010 at 7:17 PM, jammie 
>> > <jammie.emma@...<jammie.emma%40blueyonder.co.uk>>
>>
>> > wrote:
>> >
>> >>
>> >>
>> >>
>> >> test each wire conection
>> >>
>> >> orange and green wires red probe on the orange black probe on the 
>> >> green
>> >> for
>> >> +12v
>> >>
>> >> yellow and green wires red probe for yellow wire black probe on the
>> green
>> >> wire for +5v
>> >>
>> >> purple and green wires red probe on the green wire black probe on the
>> >> purple wire for -12v
>> >>
>> >> test this for me and give me your readings
>> >>
>> >> does the floppy drive work as this is the 5v line
>> >>
>> >> the 5 v on the mother boards for other circuits gets its 5v from power
>> >> regulators of the +12v supply
>> >>
>> >> ----- Original Message -----
>> >> From: preslavl
>> >> To: emax@yahoogroups.com <emax%40yahoogroups.com> <emax%
>> 40yahoogroups.com>
>> >> Sent: Friday, February 05, 2010 9:37 PM
>> >> Subject: [emax] Re: Emax Problem Diagnosis
>> >>
>> >> So I tried testing the voltages at the connector that goes between the
>> PS
>> >> board and the CPU Board. I tested on the PS side. If I follow the 
>> >> color
>> >> coding I read in a message on here somewhere: Yellow (+5V), Orange
>> >> (+12V),
>> >> Purple (-12V), and Green (0V/Ground).
>> >>
>> >> I get nowhere near those voltages...now I might be doing this 
>> >> completely
>> >> wrong, but I get +12V at the Green wire, and 0v at the Yellow (where I
>> >> should be getting +5V). I also get +17V at the Orange wire...
>> >>
>> >> Again, I'm not sure if I'm testing at the correct points. By the way 
>> >> I'm
>> >> still getting sound out of the Emax so it has not exploded in my hands
>> as
>> >> of
>> >> yet.
>> >>
>> >> --- In emax@yahoogroups.com <emax%40yahoogroups.com> <emax%
>> 40yahoogroups.com>, "jammie"
>>
>> >> <jammie.emma@...> wrote:
>> >> >
>> >> > right the cv (control voltages for the filter cutoff vca and 
>> >> > resonance
>> >> are sent by the cv circuit ranging from 0v-5v
>> >> >
>> >> > which is sent by the cpu for control off the filter depending on
>> >> > envelope
>> >> settings or external controllers
>> >> >
>> >> > now the ssm2300 are sample and hold circuits they send out the 
>> >> > digital
>> >> info into analog voltages which are sampled then transmitted as a
>> voltage
>> >> in
>> >> the range of 0-5v 0v = 0 resonance 5v = full resonance
>> >> >
>> >> > or cut off or vca volume
>> >> >
>> >> > thats what the first 3 ssm2300 deal with
>> >> >
>> >> > the 4th ssm2300 deals with the digital signal comming from the dacs
>> >> > this
>> >> is the samples that are transmitted from the ram to the dacs and to 
>> >> the
>> >> samplre and hold circuits which send out voltages 0-5v which corispond
>> to
>> >> the digital sound into analog format
>> >> >
>> >> > now if you are getting sound out then the ssm2300 for that part of 
>> >> > the
>> >> circuit is working it seems to be the cv circuit that you are having a
>> >> problem with not being sent into the ssm2300 to be made into the 
>> >> analog
>> >> control voltages
>> >> >
>> >> > ----- Original Message -----
>> >> > From: preslavl
>> >> > To: emax@yahoogroups.com <emax%40yahoogroups.com> <emax%
>> 40yahoogroups.com>
>> >> > Sent: Friday, February 05, 2010 7:18 PM
>> >> > Subject: [emax] Re: Emax Problem Diagnosis
>> >> >
>> >> >
>> >> >
>> >> > 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 <emax%40yahoogroups.com> <emax%
>> 40yahoogroups.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 <emax%40yahoogroups.com> <emax%
>> 40yahoogroups.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
>> >> > >
>> >> > >
>> >> > >
>> >> > >
>> >> > >
>> >> > >
>> >> > > ----------------------------------------------------------
>> >> > >
>> >> > >
>> >> > >
>> >> > > No virus found in this incoming message.
>> >> > > Checked by AVG - www.avg.com
>> >> > > Version: 8.5.435 / Virus Database: 271.1.1/2669 - Release Date:
>> >> 02/05/10 07:35:00
>> >> > >
>> >> > >
>> >> > > [Non-text portions of this message have been removed]
>> >> > >
>> >> >
>> >> >
>> >> >
>> >> >
>> >> >
>> >> >
>> >> > ----------------------------------------------------------
>> >> >
>> >> >
>> >> >
>> >> > No virus found in this incoming message.
>> >> > Checked by AVG - www.avg.com
>> >> > Version: 8.5.435 / Virus Database: 271.1.1/2669 - Release Date:
>> >> > 02/05/10
>> >> 07:35:00
>> >> >
>> >> >
>> >> > [Non-text portions of this message have been removed]
>> >> >
>> >>
>> >> ----------------------------------------------------------
>> >>
>> >> No virus found in this incoming message.
>> >> Checked by AVG - www.avg.com
>> >> Version: 8.5.435 / Virus Database: 271.1.1/2669 - Release Date: 
>> >> 02/05/10
>> >> 07:35:00
>> >>
>> >> [Non-text portions of this message have been removed]
>> >>
>> >>
>> >>
>> >
>> >
>> > [Non-text portions of this message have been removed]
>> >
>> >
>> >
>> > ------------------------------------
>> >
>> > Emax and Emax II User's Group Website
>> >
>> > http://www.silveriafamily.comYahoo! Groups Links
>>
>> >
>> >
>> >
>>
>> ----------------------------------------------------------
>>
>> No virus found in this incoming message.
>> Checked by AVG - www.avg.com
>> Version: 8.5.435 / Virus Database: 271.1.1/2669 - Release Date: 02/05/10
>> 07:35:00
>>
>>
>>
>
>
> [Non-text portions of this message have been removed]
>
>
>
> ------------------------------------
>
> Emax and Emax II User's Group Website
>
> http://www.silveriafamily.comYahoo! Groups Links
>
>
>


--------------------------------------------------------------------------------



No virus found in this incoming message.
Checked by AVG - www.avg.com
Version: 8.5.435 / Virus Database: 271.1.1/2671 - Release Date: 02/06/10 
07:35:00