CGS28 sequencer problems
2008-09-01 by Jeff Laity
I'm building the CGS28 sequencer for MOTM format using the
Bridechamber panel. It's assembled, but when I power it up and send
clock I only see a faint pulse on the first LED. It doesn't progress
to any of the other steps. I've tried the two mods:
TL074 pin 8: change 22k to 100k
4516 pin 15: cut trace, 4.7k to ground. (Actually I used a 4.3k
resistor because that was all I had.)
I have a TI part for my 4516 and I used a TL074 for the input buffer.
There are some photos of my build here:
http://www.jefflaity.com/MOTM/seq/
I am using the square wave LFO of a Moog Voyager to clock the unit. I
tried disconnecting the step switch completely with no change.
If you have any ideas to get my unit working, I would appreciate the
help. Thank you, -jl
NOTICE: This electronic mail message and its contents, including any attachments hereto (collectively, "this e-mail"), is hereby designated as "confidential and proprietary." This e-mail�may be viewed and used only by the person to whom it has been sent and his/her employer�solely for the express purpose for which it has been disclosed and only in�accordance with any confidentiality or non-disclosure (or similar) agreement between TEAC Corporation or its affiliates and said employer, and may not be disclosed to any other person or entity. �
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Bridechamber panel. It's assembled, but when I power it up and send
clock I only see a faint pulse on the first LED. It doesn't progress
to any of the other steps. I've tried the two mods:
TL074 pin 8: change 22k to 100k
4516 pin 15: cut trace, 4.7k to ground. (Actually I used a 4.3k
resistor because that was all I had.)
I have a TI part for my 4516 and I used a TL074 for the input buffer.
There are some photos of my build here:
http://www.jefflaity.com/MOTM/seq/
I am using the square wave LFO of a Moog Voyager to clock the unit. I
tried disconnecting the step switch completely with no change.
If you have any ideas to get my unit working, I would appreciate the
help. Thank you, -jl
NOTICE: This electronic mail message and its contents, including any attachments hereto (collectively, "this e-mail"), is hereby designated as "confidential and proprietary." This e-mail�may be viewed and used only by the person to whom it has been sent and his/her employer�solely for the express purpose for which it has been disclosed and only in�accordance with any confidentiality or non-disclosure (or similar) agreement between TEAC Corporation or its affiliates and said employer, and may not be disclosed to any other person or entity. �
�
�
