Emax

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@...>
To: <emax@yahoogroups.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@...> 
> 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>>
>> To: <emax@yahoogroups.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>>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>>
>> >> To: <emax@yahoogroups.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>>
>>
>> >>
>> >> > 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>
>> >> >> 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>, "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>
>> >> >> > 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>, "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>
>> >> >> > > 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