Alto amplifier troubleshooting

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Alexander

Member
Joined
May 12, 2005
Messages
10
Location
Israel
Hello.

I have a problem with MACRO 830/1400/2400 manufactured by ALTO.
It seems that these amplifiers are delivered unadjusted. They overheat even without load and often get out of order.

There are VR1, VR2 and VR3 trimmers on the each board. Does anyone know how to properly adjust them?
 

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