K561TM2 DATASHEET PDF
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On upper voice registers 2 and 4. Please email me with any corrections or pertinent information at: The bender range was way off, so adjusted with these two trimmers: To be fair there are some nice features on this synth, One is the handy hinged keyboard assembly, that lifts for voice board access. Built in military production plants in the former Soviet Union.
The EM has a ‘slide’ control with interval.
They are pretty fragile on this synth. Update – I actually found out that datasneet controls only affect pedal operation and were not faulty after all. It’s worth repairing this solder bridge between boards.
K561NA7, K561NC2, K561TM2
A dry resistor solder joint was responsible for range upper 2′ not working. Synths built in the USSR tend to scare people away as they seem hard to repair and deemed to be full of exotic components.
Datasheet here and rough English translation here. This turned out to be a bad diode KP I assume it’s the same as the ‘glide’ dqtasheet on western synths. On my synth this doesn’t work.
KTM2 Datasheet PDF –
These synths are very well built and look really cool. The EM is considered a string synthesizer but it has organ and brass.
In reality many are just Russian equivalents of western components, such as 40 logic IC’s. I have the transposer board out and I think it’s a faulty logic IC. This diode was replaced with a 1N and the upper 4′ voice issue was fixed. It’s hard to get information on these synths in English. I assume it’s the same as the ‘glide’ found. It also has quite an aggressive filter which screams when over driven. Watch when de-soldering components that you don’t lift the PCB tracks.
Thanks go to Karolis for confirming this.
(PDF) K561TM2 Datasheet download
Although my synth was ok, many EM’s have keys that do not release. This can be down to a bad capacitor which sits under the corresponding key. They are in Russian but will at least throw some light on the internals. My particular synth was made in The synth is fully polyphonic, paraphonic really. It was fun to decode the IC’s though. One of the upper ‘B’ notes was stuck on. Electronically they are not the most reliable.
In reality many are just Russian equivalents of western components, such as 40 logic IC’s The hassle can be working out what the alternatives are. Another issue was some bad solder dry joints. Get yourself the schematics. It sounds the buisness with a small stone phaser.