You should buy the correct voltage 9V DC, 300mA adapter. If you adjust the voltages in the synth with 8.5V then if someone in the future was to use a correct 9V, it might cause the power supply or even other parts in the synth to fail.
Get a correct AC adapter - 9V DC 300mA.
/Mike
From: "purpurinisukutis@... [korgpolyex]" <korgpolyex@yahoogroups.com>
To: korgpolyex@yahoogroups.com
Sent: Tuesday, May 16, 2017 7:18 AM
Subject: Re: [korgpolyex] Re: Check and adjustment procedure
To: korgpolyex@yahoogroups.com
Sent: Tuesday, May 16, 2017 7:18 AM
Subject: Re: [korgpolyex] Re: Check and adjustment procedure
Few steps in adjustment procedure consists of measuring voltage while using original 9V, 300mA AC adapter, however when i bought the synth i got not original power supply - its 8.5V, 350 mA. Do you think that i could use that one for this procedure, or do i need to buy specificly 9V, 300mA AC adapter? If original adapter is needed, maybe you know some alternatives for it?