Emax

yes

it could be a broken cv dac or it could be the opamp the tlo82
----- Original Message ----- 
From: "Preslav Lefterov" <plefterov@...>
To: <emax@yahoogroups.com>
Sent: Monday, February 08, 2010 10:01 PM
Subject: Re: [emax] Re: Emax Problem Diagnosis


> Jammie,
>
> Just tested:
>
> Preset Definition: Realtime controls: Pedal to FC - nothing; Pedal to 
> Pitch
> - I hear it modulating the pitch.
>
> Then I tried MIDI A to FC:
>
> I assigned MIDI A to FC and modulated that from an external source 
> (Cubase).
> When I assigned Midi A to Pitch it works and modulates the Pitch. When I
> switch to volume/frequency/pan - I get nothing. Should I be measuring the
> voltage across pin 3 of the ssm2300s while I'm modulating with MIDI A /
> Pedal?
>
>
> Preslav
>
>
> On Mon, Feb 8, 2010 at 2:40 PM, jammie <jammie.emma@...> 
> wrote:
>
>>
>>
>> you are not getting any cv voltage its just set to ov
>>
>> that no voltage
>>
>> so no voltage is being sent out by the ssm2300
>>
>> ov means no resonance no volume no filtercut no pan
>>
>> try setting up an external contreol to the filter cutoff to if it will
>> sweep
>>
>> ----- Original Message -----
>> From: "Preslav Lefterov" <plefterov@... <plefterov%40gmail.com>>
>> To: <emax@yahoogroups.com <emax%40yahoogroups.com>>
>> Sent: Monday, February 08, 2010 7:06 PM
>> Subject: Re: [emax] Re: Emax Problem Diagnosis
>>
>> > Jammie,
>> >
>> > Sorry for the delay. Got the readings:
>> >
>> > *IC41: *
>> >
>> > I have +10V on pin8, and -12V on pin4.
>> >
>> > *IC49:*
>> >
>> > I have +5V on pin 14
>> >
>> > *SSM2300s:*
>> >
>> > On all 4 I consistently have the following readings:
>> >
>> > pin 7 = -4.87V, pin 16 = +10.0V, pin 3 = 0.00V
>> >
>> >
>> > Any other ideas? You mentioned I should be getting 0-5V on pin 3 from 
>> > the
>>
>> > CV
>> > voltage on all ssm2300s...how can I test that the voltage goes up to 5v
>> > since now it stays at 0.00v?
>> >
>> >
>> > Thanks,
>> >
>> > Preslav
>> >
>> >
>> >
>> >
>> > On Sat, Feb 6, 2010 at 4:04 PM, jammie 
>> > <jammie.emma@...<jammie.emma%40blueyonder.co.uk>>
>>
>> > wrote:
>> >
>> >>
>> >>
>> >> 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@... 
>> >> <plefterov%40gmail.com><plefterov%
>> 40gmail.com>>
>> >> To: <emax@yahoogroups.com <emax%40yahoogroups.com> <emax%
>> 40yahoogroups.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@... 
>> >> > <jammie.emma%40blueyonder.co.uk><jammie.emma%
>> 40blueyonder.co.uk>>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>
>> >> >> <plefterov%40gmail.com><plefterov%
>> >> 40gmail.com>>
>> >> >> To: <emax@yahoogroups.com <emax%40yahoogroups.com> <emax%
>> 40yahoogroups.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><jammie.emma%
>> 40blueyonder.co.uk>
>> >> <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> <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> <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> <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> <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> <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
>> >>
>> >>
>> >>
>> >
>> >
>> > [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: 271.1.1/2675 - Release Date: 02/08/10
>> 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: 271.1.1/2675 - Release Date: 02/08/10 
07:35:00