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Document revision 2.1 – Last modification : 01/12/21
MP 599 Main board Assembly guide
18. Output transformer
Insert and solder the output transformer.
19. Potentiometers P1 & P2
Place the bracket on the potentiometer bushing, and attach it with the lock washer and nut. Tighten.
Insert potentiometer and bracket into the PCB holes. Solder the central potentiometer pin. Now check
that the potentiometer shaft is perfectly parallel to the board. Then solder the other pins.
Warning
: A good potentiometer position is very important for a good match with the front panel.
20. Large electrolytic
Add C9.
This capacitors is bipolar so it can be inserted in any direction.
21. IC
Insert U1 into its socket. It is necessary to bend the pins slightly inward before inserting.
Warning
: Make sure to insert the IC in the correct direction which is identified by a notch.
22. Visual check
At this point, brush the solder side with a hard tooth brush to remove any remaining solder bits.
Make a full visual check. When everything looks correct, proceed with the frame assembly.
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