Search found 118 matches

by JHatzia
Tue Aug 01, 2017 3:33 am
Forum: HELP!
Topic: ESQ-1 Sound Issues
Replies: 21
Views: 4824

Re: ESQ-1 Sound Issues

I agree looking towards the battery was a loose theory and probably not the source of the issue. However the previous owner did a suspect job of replacing the battery, so I desoldered his AA pack replacement, cleaned up the flux (not a burnt pad) and replaced it with a proper battery from Syntaur. A...
by JHatzia
Mon Jul 31, 2017 6:27 pm
Forum: HELP!
Topic: ESQ-1 Sound Issues
Replies: 21
Views: 4824

Re: ESQ-1 Sound Issues

Thank you! I have tried the Soft Reset and Filter calibration before after reading in the manual to do so if BATT reads 000. The Soft Reset seems to work fine, the patches revert to the original and I can save. However BATT is still 000. Filter Tunings are within 140-160 as expected. I will review y...
by JHatzia
Mon Jul 31, 2017 4:27 pm
Forum: HELP!
Topic: ESQ-1 Sound Issues
Replies: 21
Views: 4824

Re: ESQ-1 Sound Issues

The polarity of the battery is correct. There were two solder tabs underneath the + lead of the battery that looked like a component may have went there- but I'm pretty sure it's for batteries that have two leads on one side. Do you know the specific resistor name, +VBAT (is this part of an IC?) and...
by JHatzia
Mon Jul 31, 2017 3:47 pm
Forum: HELP!
Topic: ESQ-1 Sound Issues
Replies: 21
Views: 4824

Re: ESQ-1 Sound Issues

All ribbons seem to be fine. Like I said, I can hear the metronome as should- just all the voices barely make a sound except a single voice makes the same sound regardless of which patch. I'm just trying to figure out where the battery feeds to, to see if I can measure where the voltage drops off.
by JHatzia
Mon Jul 31, 2017 6:09 am
Forum: HELP!
Topic: ESQ-1 Sound Issues
Replies: 21
Views: 4824

ESQ-1 Sound Issues

I have a mint ESQ-1 that had its battery replaced with a AA pack from the previous owner. Apparently after this the synth lost nearly all it's sound and only makes a squawk every 8th voice. Otherwise it operates as should, all the buttons and faders work, I can save patches, I can even hear the metr...
by JHatzia
Tue Jul 04, 2017 8:21 am
Forum: HELP!
Topic: Korg DW8000 not working, please help.
Replies: 44
Views: 14396

Re: Korg DW8000 not working, please help.

Thanks for the reply. Grounding a DVM to the TP-DG that's connected to C80, I probed each leg of IC40 and wasn't getting 5V.. However, Pin 6 on IC35 gets 5V. I get 5V from C80 as well.
by JHatzia
Mon Jul 03, 2017 7:05 pm
Forum: HELP!
Topic: Korg DW8000 not working, please help.
Replies: 44
Views: 14396

Re: Korg DW8000 not working, please help.

Looks like the CPU isn't reseting properly. There is no spike of voltage on PIN 6 of IC35.
by JHatzia
Sun Jul 02, 2017 8:41 am
Forum: HELP!
Topic: Korg DW8000 not working, please help.
Replies: 44
Views: 14396

Re: Korg DW8000 not working, please help.

Sorry to double post.. I'm experiencing the exact same issue. I tried replacing the EPROM with no luck. The PSU in mine is fine as well, which makes me think it's CPU related. My unit will sporadically make these sweeping resonant filter sounds.. So it's making sound. However, the synth will not rea...
by JHatzia
Fri Apr 28, 2017 2:12 am
Forum: HELP!
Topic: Korg DW8000 not working, please help.
Replies: 44
Views: 14396

Re: Korg DW8000 not working, please help.

Experiencing the same issue. I also replaced a poorly done battery replacement and have a new EPROM ver 12 on the way. Let's figure this out and get this issue solved.
by JHatzia
Sat Feb 04, 2017 12:21 am
Forum: HELP!
Topic: Kawai SX-240 Quiet/Failing DCO1
Replies: 0
Views: 729

Kawai SX-240 Quiet/Failing DCO1

Just acquired a beautiful Kawai SX-240. It's in great cosmetic condition but has some issues with DCO1 I'm trying to tackle. I have yet to open up this unit, but some suggestion thus far suggest possibly some 4XXX IC's are dead inside the unit- but then again I have no clue until opening it up Here ...
by JHatzia
Tue Jan 17, 2017 11:18 pm
Forum: HELP!
Topic: Excessive crackling - Jx-3p chorus
Replies: 8
Views: 1585

Re: Excessive crackling - Jx-3p chorus

I had a similar issue with my Juno 106. After cleaning the H M L volume switch on the back, this seemed to fix the issue.
by JHatzia
Mon Jan 16, 2017 12:45 am
Forum: HELP!
Topic: JX-3P with Skipping Fader
Replies: 76
Views: 7589

Re: JX-3P with Skipping Fader

Well, I'm really happy to report that the issue was fixed. I'm even more happy that the solution turns out (at least I believe) to not be my fault, but instead possibly from factory. If I held my finger on the lower ground lug, slider out and the upper joint of R95 the issue would more or less fix i...
by JHatzia
Fri Jan 13, 2017 7:35 pm
Forum: HELP!
Topic: JX-3P with Skipping Fader
Replies: 76
Views: 7589

Re: JX-3P with Skipping Fader

Yeah I figured it was stupid to mess with this. I am fairly positive it was these PINs. By just touching them the LEDs would behave as they should- however upon plugging in an audio cable it was obvious some keys weren't working, the bender was really messed up and even though 9-11 LEDs worked like ...
by JHatzia
Fri Jan 13, 2017 9:05 am
Forum: HELP!
Topic: JX-3P with Skipping Fader
Replies: 76
Views: 7589

Re: JX-3P with Skipping Fader

Actually- NOPE! While jumping PIN13 to 9 on IC4 solved the 9-11 LED issue the synth was acting very strange with some notes note triggering, and in fact the bender was all messed up. I just undid the jumper wire and I'm back to where we're at. Interesting how it fixed the skipping fader issue for a ...
by JHatzia
Fri Jan 13, 2017 8:57 am
Forum: HELP!
Topic: JX-3P with Skipping Fader
Replies: 76
Views: 7589

Re: JX-3P with Skipping Fader

OK! So I believe I fixed it. I'm sure everyone else in this thread could explain it better than me. I was poking around trying to figure out which joints my finger was connecting. It looks like on IC4 PIN 13 and 9, if jumped together, solves the issue. Is there any possible explanation to this? Feel...