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  Topic: Korg T1 dead, trying to get it back to life ! [SOLVED]
T3owner

Replies: 2
Views: 59

PostForum: Korg Synths (General)   Posted: Sat Mar 16, 2019 6:03 pm   Subject: Re: Korg T1 dead, trying to get it back to life ! (need advi
Hello,

This T1 doesn't do anything when I turn it on, no screen, no floppy loading sounds, nothing...

What I've done so far:

- I fixed the power supply, now it works ok, 5v, +-12v good. (sti ...
  Topic: KORG X3 SYSEX PRELOAD PLEASE !!
T3owner

Replies: 18
Views: 10534

PostForum: Korg Synths (General)   Posted: Thu Dec 27, 2018 11:19 pm   Subject: Re: This works! ... No need to convert anything
PD/ Sorry had only the older posts page and didn't see the page where you had the solution posted already.

Embarassed Embarassed
No problem. Either Redbeard25 hasn't seen either of our messages, or ...
  Topic: KORG X3 SYSEX PRELOAD PLEASE !!
T3owner

Replies: 18
Views: 10534

PostForum: Korg Synths (General)   Posted: Sat Dec 22, 2018 11:51 am   Subject: KORG X3 SYSEX PRELOAD PLEASE !!
Is there some magic combination of things that have to happen in order for the keyboard to be in "receive" mode?
I presume this is the file you downloaded:
http://i.korg.com/uploads/Downlo ...
  Topic: M1 requires trouble shooting
T3owner

Replies: 25
Views: 2257

PostForum: Korg Synths (General)   Posted: Mon Dec 10, 2018 9:36 pm   Subject: M1 requires trouble shooting
Just power via CN12 should be sufficient. Use pins 2/3 of that connector (or something connected to those pins) as common for the measurements.
  Topic: M1 requires trouble shooting
T3owner

Replies: 25
Views: 2257

PostForum: Korg Synths (General)   Posted: Mon Dec 10, 2018 2:52 pm   Subject: M1 requires trouble shooting
Checked the AD board 1261.
All capacitors and resistors are good.
Voltage values are good.
Please be specific (not just "good") - what are the voltages with respect to ground at all the p ...
  Topic: Korg 01/W FD capasitor question
T3owner

Replies: 2
Views: 629

PostForum: Korg Synths (General)   Posted: Sat Nov 24, 2018 10:07 pm   Subject: Re: Korg 01/W FD capasitor question
Hi, I recently bought a Korg 01/W FD and knowing that the caps tends to leak I checked them out. And sure enough some of them are leaking.
OK, it's good you found them before the electrolyte causes c ...
  Topic: M1 requires trouble shooting
T3owner

Replies: 25
Views: 2257

PostForum: Korg Synths (General)   Posted: Tue Nov 20, 2018 11:14 am   Subject: M1 requires trouble shooting
R26 = 11.97v
OK

 
R25 = 11.96v
Please pay attention to polarity - "C" voltage should be negative with respect to ground.

 
C48 = 0.0
Are you certain? Voltage at "M" wou ...
  Topic: M1 requires trouble shooting
T3owner

Replies: 25
Views: 2257

PostForum: Korg Synths (General)   Posted: Sat Nov 17, 2018 10:18 pm   Subject: M1 requires trouble shooting
Acetone or lacwuer thinner on electronic components seems harsh.
Would one use hair dryet for heat
A small amount of solvent, applied carefully with a cotton swab, is unlikely to cause problems. I'v ...
  Topic: M1 requires trouble shooting
T3owner

Replies: 25
Views: 2257

PostForum: Korg Synths (General)   Posted: Sat Nov 17, 2018 7:21 pm   Subject: M1 requires trouble shooting
What is the preferred way to this 30 yr old remove glue.
There is a resistor on the power board that has its legs buried in it.
Scrape as much off as you can with whatever tool you prefer. It will ...
  Topic: M1 requires trouble shooting
T3owner

Replies: 25
Views: 2257

PostForum: Korg Synths (General)   Posted: Sat Nov 17, 2018 10:46 am   Subject: M1 requires trouble shooting
My power supply board is KLM 1268 117CN
Cap #18 was shot and replaced.
Replacement cap should be low-ESR type meant for switching supply frequency, and 105 degree C rating is preferred.

 
Excess ...
  Topic: M1 requires trouble shooting
T3owner

Replies: 25
Views: 2257

PostForum: Korg Synths (General)   Posted: Fri Nov 16, 2018 7:00 pm   Subject: M1 requires trouble shooting
Many distortion problems are caused in the DAC circuit, which is sensitive to voltage. The KLM-1261 board has a power supply area (at lower left on the schematic) where the +/- 12v from the kLM-1269 i ...
  Topic: M1 requires trouble shooting
T3owner

Replies: 25
Views: 2257

PostForum: Korg Synths (General)   Posted: Fri Nov 16, 2018 8:39 am   Subject: Re: Sound is back on M1 - slight buzz heard
fault on the power board found #1261. Voltages were not +/- 12V at one connection that eventually led to the jack-board.
Capacitor leaked and since replaced Voltages are stable. Sound on all out ...
  Topic: M1 requires trouble shooting
T3owner

Replies: 25
Views: 2257

PostForum: Korg Synths (General)   Posted: Sun Nov 04, 2018 10:43 pm   Subject: M1 requires trouble shooting
What are the standard voltages and their locations?
See https://elektrotanya.com/korg_m1_sm.pdf/download.html
  Topic: M1 requires trouble shooting
T3owner

Replies: 25
Views: 2257

PostForum: Korg Synths (General)   Posted: Sun Nov 04, 2018 1:07 pm   Subject: M1 requires trouble shooting

Is the "stain" actually yellow/brown glue? If so, that material can deteriorate and absorb moisture from the air, becoming conductive. Depending on what component leads it's touching, it c ...
  Topic: M1 to T3 conversion?
T3owner

Replies: 7
Views: 684

PostForum: Korg Synths (General)   Posted: Fri Nov 02, 2018 2:23 am   Subject: M1 to T3 conversion?
Can the M1 sysex file be transferred to the T3
Already answered, above.

 
Then: If M1 Sysex successfully loaded, can the programs/combi / global data all be saved to a disk through the working F ...
 
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