Korg Trident MK1. No sound Brass/String

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kwillu
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Korg Trident MK1. No sound Brass/String

Post by kwillu » Tue Oct 01, 2019 12:06 am

Have a problem that there will be no sound of brass and string section. The Synth section works fine. Have some good suggestions on what is wrong. Has replaced the voltage regulator ua7915ckc.
The new one is KA7915 Negative Voltage Regulator.
But there are also positive voltage regulators as well. In Service_Manual it says ua7915ckc, is that negative or possetive regulator?

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