I have lost the manual for my model SX-K150 Technics organ.

https://www.manualscenter.com/manuals/technics/sxe33-service-manual.html

Try these first:

https://www.justanswer.com/electronic-musical-instruments/axjnq-technics-sx-pr53-piano-sustain-pedal-will-sporadically-stop.html

http://www.mikebarden.com/technics-electronic-digital-kn-pr-px-piano-keyboard-ensemble-repairs/technics-spares-spare-parts/

https://ourpastimes.com/how-to-repair-a-technics-piano-12377949.html

technics-keyboards-forum

I have one I can Email you. I also have a huge amount of Technics parts including parts for the G7 and F3 organs and disk drives. [email protected]

See page 40...

http://www.blurb.co.uk/books/6427503-technics-gx7-gx5-gx3-user-manual

Hi,
Here it is here: Technics SX-GN3 Owner's Manual LINK

unfortunately the way the ics are made are too old that some have been phased out and are no longer manufactured. would advise yu to seek advise by emailing samick service center with the model number of the organ and the ic number that you need.

Here is the manual. The initalize function is on page 36

http://www.synthzone.com/midi/technics/gn9/SX-GN3_GN5_GN7_GN9.pdf

Google is your friend... Here is what google found:

http://www2.panasonic.com/consumer-electronics/support/Musical-Instruments/Technics-Musical-Instruments/Portable-Keyboards/model.SX-KN501

Download the manual there.

You will find here the french owner's manual of Technics Organs sx-E55 and sx-E66. Other languages are also available in this page: English, German, Spanish and Dutch :

http://www.deprez.org/folio_0029_en.html

Find the "factory reset" procedure and execute it...

For SOME of the Technics units it is as follows:

It can be reverted to the original factory preset very easily. Simply press MEM&CTRL button, then select Initial from the LCD menu then followed by Total Organ

Also there may be a memory battery in the unit that is depleted that needs changing if you find settings are lost when power is removed.