Cgs synth

>i recently built the cgs master divider, and am having trouble isolating a

>
>everything works fine, except: 2A stays at 5v, and 2C stays at 0v. the

>
>i swapped out the transistors related to those outputs, as well as swapping

>
>i'd be appreciative of any suggestions for further investigation, and

>
>thanks,
>matthew
>
>
>
>------------------------------------
>
>The CGS Modular Synth home page: http://www.cgs.synth.net/
>Yahoo! Groups Links
>
>
>
>

--- In cgs_synth@yahoogroups.com, sasami@... wrote:
>
> The fault would be with a bad connection between the 4070 (pin 8) and the
> 4024 (pin 12). Possibly a missing link, or a bad joint or break in the
> track. The counter is working fine if all other outputs are behaving.
>
> Ken
>
> >i recently built the cgs master divider, and am having trouble isolating a
> couple of problems (possibly one problem with two symptoms).
> >
> >everything works fine, except: 2A stays at 5v, and 2C stays at 0v. the
> other "2" divisions work fine.
> >
> >i swapped out the transistors related to those outputs, as well as swapping
> the 4070, no change. continuity has been checked from the output at the
> jack/led to the chips. the leds light/jacks work when plugged into other
> outputs.
> >
> >i'd be appreciative of any suggestions for further investigation, and
> welcome the opportunity to learn from whatever mistake i might have made (or
> from the remote chance that a part may be defective).
> >
> >thanks,
> >matthew
> >
> >
> >
> >------------------------------------
> >
> >The CGS Modular Synth home page: http://www.cgs.synth.net/
> >Yahoo! Groups Links
> >
> >
> >
> >
> _______________________________________________________________________
> Ken Stone sasami@... otherunicorn@...
> Modular Synth PCBs for sale <http://www.cgs.synth.net/>
> Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>
>

>Thanks very much Ken.
>
>There's continuity between the 4070 pin 8, and the 4024 pin 12, and I

>
>There is also some anomalous behaviour in the div4 outputs. instead of

>
>The div8 and div16 outputs appear to be working fine.
>
>Thanks again,
>Mattew
>
>
>
>
>--- In cgs_synth@yahoogroups.com, sasami@... wrote:
>>
>> The fault would be with a bad connection between the 4070 (pin 8) and the
>> 4024 (pin 12). Possibly a missing link, or a bad joint or break in the
>> track. The counter is working fine if all other outputs are behaving.
>>
>> Ken
>>
>> >i recently built the cgs master divider, and am having trouble isolating a
>> couple of problems (possibly one problem with two symptoms).
>> >
>> >everything works fine, except: 2A stays at 5v, and 2C stays at 0v. the
>> other "2" divisions work fine.
>> >
>> >i swapped out the transistors related to those outputs, as well as swapping
>> the 4070, no change. continuity has been checked from the output at the
>> jack/led to the chips. the leds light/jacks work when plugged into other
>> outputs.
>> >
>> >i'd be appreciative of any suggestions for further investigation, and
>> welcome the opportunity to learn from whatever mistake i might have made (or
>> from the remote chance that a part may be defective).
>> >
>> >thanks,
>> >matthew
>> >
>> >
>> >
>> >------------------------------------
>> >
>> >The CGS Modular Synth home page: http://www.cgs.synth.net/
>> >Yahoo! Groups Links
>> >
>> >
>> >
>> >
>> _______________________________________________________________________
>> Ken Stone sasami@... otherunicorn@...
>> Modular Synth PCBs for sale <http://www.cgs.synth.net/>
>> Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>
>>
>
>
>
>
>------------------------------------
>
>The CGS Modular Synth home page: http://www.cgs.synth.net/
>Yahoo! Groups Links
>
>
>
>

--- In cgs_synth@yahoogroups.com, sasami@... wrote:
>
> Check that pin 9 of the 4070 really does go to +ve. It may be floating.
>
> Ken
>
> >Thanks very much Ken.
> >
> >There's continuity between the 4070 pin 8, and the 4024 pin 12, and I
> replaced the jumper that's in the path just to make sure it wasn't those
> joints.
> >
> >There is also some anomalous behaviour in the div4 outputs. instead of
> being properly offset in phase, 3C & 2B go high/low together, and 3A & 2D go
> high/low together 180 degrees offset from 3C & 2B.
> >
> >The div8 and div16 outputs appear to be working fine.
> >
> >Thanks again,
> >Mattew
> >
> >
> >
> >
> >--- In cgs_synth@yahoogroups.com, sasami@ wrote:
> >>
> >> The fault would be with a bad connection between the 4070 (pin 8) and the
> >> 4024 (pin 12). Possibly a missing link, or a bad joint or break in the
> >> track. The counter is working fine if all other outputs are behaving.
> >>
> >> Ken
> >>
> >> >i recently built the cgs master divider, and am having trouble isolating a
> >> couple of problems (possibly one problem with two symptoms).
> >> >
> >> >everything works fine, except: 2A stays at 5v, and 2C stays at 0v. the
> >> other "2" divisions work fine.
> >> >
> >> >i swapped out the transistors related to those outputs, as well as swapping
> >> the 4070, no change. continuity has been checked from the output at the
> >> jack/led to the chips. the leds light/jacks work when plugged into other
> >> outputs.
> >> >
> >> >i'd be appreciative of any suggestions for further investigation, and
> >> welcome the opportunity to learn from whatever mistake i might have made (or
> >> from the remote chance that a part may be defective).
> >> >
> >> >thanks,
> >> >matthew
> >> >
> >> >
> >> >
> >> >------------------------------------
> >> >
> >> >The CGS Modular Synth home page: http://www.cgs.synth.net/
> >> >Yahoo! Groups Links
> >> >
> >> >
> >> >
> >> >
> >> _______________________________________________________________________
> >> Ken Stone sasami@ otherunicorn@
> >> Modular Synth PCBs for sale <http://www.cgs.synth.net/>
> >> Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>
> >>
> >
> >
> >
> >
> >------------------------------------
> >
> >The CGS Modular Synth home page: http://www.cgs.synth.net/
> >Yahoo! Groups Links
> >
> >
> >
> >
> _______________________________________________________________________
> Ken Stone sasami@... otherunicorn@...
> Modular Synth PCBs for sale <http://www.cgs.synth.net/>
> Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>
>

--- In cgs_synth@yahoogroups.com, "goodnessgrows" <goodnessgrows@...> wrote:
>
> Thanks again Ken. Pin 9 of all 4070s read 14.6v. I checked at the pin on the IC and on the solder side of the board.
>
> --- In cgs_synth@yahoogroups.com, sasami@ wrote:
> >
> > Check that pin 9 of the 4070 really does go to +ve. It may be floating.
> >
> > Ken
> >
> > >Thanks very much Ken.
> > >
> > >There's continuity between the 4070 pin 8, and the 4024 pin 12, and I
> > replaced the jumper that's in the path just to make sure it wasn't those
> > joints.
> > >
> > >There is also some anomalous behaviour in the div4 outputs. instead of
> > being properly offset in phase, 3C & 2B go high/low together, and 3A & 2D go
> > high/low together 180 degrees offset from 3C & 2B.
> > >
> > >The div8 and div16 outputs appear to be working fine.
> > >
> > >Thanks again,
> > >Mattew
> > >
> > >
> > >
> > >
> > >--- In cgs_synth@yahoogroups.com, sasami@ wrote:
> > >>
> > >> The fault would be with a bad connection between the 4070 (pin 8) and the
> > >> 4024 (pin 12). Possibly a missing link, or a bad joint or break in the
> > >> track. The counter is working fine if all other outputs are behaving.
> > >>
> > >> Ken
> > >>
> > >> >i recently built the cgs master divider, and am having trouble isolating a
> > >> couple of problems (possibly one problem with two symptoms).
> > >> >
> > >> >everything works fine, except: 2A stays at 5v, and 2C stays at 0v. the
> > >> other "2" divisions work fine.
> > >> >
> > >> >i swapped out the transistors related to those outputs, as well as swapping
> > >> the 4070, no change. continuity has been checked from the output at the
> > >> jack/led to the chips. the leds light/jacks work when plugged into other
> > >> outputs.
> > >> >
> > >> >i'd be appreciative of any suggestions for further investigation, and
> > >> welcome the opportunity to learn from whatever mistake i might have made (or
> > >> from the remote chance that a part may be defective).
> > >> >
> > >> >thanks,
> > >> >matthew
> > >> >
> > >> >
> > >> >
> > >> >------------------------------------
> > >> >
> > >> >The CGS Modular Synth home page: http://www.cgs.synth.net/
> > >> >Yahoo! Groups Links
> > >> >
> > >> >
> > >> >
> > >> >
> > >> _______________________________________________________________________
> > >> Ken Stone sasami@ otherunicorn@
> > >> Modular Synth PCBs for sale <http://www.cgs.synth.net/>
> > >> Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>
> > >>
> > >
> > >
> > >
> > >
> > >------------------------------------
> > >
> > >The CGS Modular Synth home page: http://www.cgs.synth.net/
> > >Yahoo! Groups Links
> > >
> > >
> > >
> > >
> > _______________________________________________________________________
> > Ken Stone sasami@ otherunicorn@
> > Modular Synth PCBs for sale <http://www.cgs.synth.net/>
> > Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>
> >
>