Fully working then some component shuffling and now no sequencer

Discontinued products Anushri
#1

I went slow during the first built double checked everything as I went. 8 hours later everything worked on first power up. Synth was happy, I was recording and playing back sequences. Drums worked. All knobs responded 100%. I had a blast.

I was originally going to build my own enclosure using the rack kit as a faceplate (because it looks so good.) Then I decided to to go ahead and rack it. This meant relocating the rear ports to the I/O expander.

I gently desoldered both midi connectors and audio connectors. Kept the wall wart input where it was for now (that is to say I am still powering from the same adapter it worked fine with 9v 750mA). Now I have the following symptoms.

I can’t run the sequencer. Synth live play is fine, record seems to work (it steps through as I key press). So midi input is working and audio output is working but I can run a recorded sequence or drums. The run button seems fully unresponsive.

I plan on testing it out when i get a sec but I’m leaning towards a bad run/stop switch?

I was hoping someone had seen this before and could save me a bit of time. I will post back as I go through the test instructions.

#2

> The run button seems fully unresponsive.

Maybe you have just set the tempo to 0 (external clock)?

#3

Glad I posted. One more thing to check. Thanks.

#4

I don’t know if Ill get a chance to bench it tonight but a couple more things i tried:

Tempo as suggested: this does affect the playback speed of an arpeggiated synth so the knob does seem to be set to a non zero value. I also tested it again with no midi input (after verifying I wasn’t on Ch 16 or anything)

To see if other run stop functions work I tried a factory reset. Should the unit take longer to come up after one of these? Light pattern or anything?

#5

Finally got some time. Set the meter to the tactile switch and got high resistance no matter the switch position.

Replaced it with the hold switch for now then ordered a new switch.

I dismantled the switch to see what i could and sure enough a tiny bit of the glue I used to keep the caps on had gotten into it.

I am go again to get this fine synth racked. Solved and thanks.