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Posted on Jan 02, 2017
Behringer does NOT supply diagrams except to their authorized repair facilities... I know as I have tried and I wind up repairing without diagrams/schematics most of the time. In some cases I have traced out the circuitry.
FORTUNATELY mixers are fairly simple circuitry.
MOST problems I have encountered were due to defective sliders and in one case liquid had caused circuit traces to short and the burned area had to be carved out and jumpers placed where the traces were missing.
the circuitry repeats several times so one can look at adjacent channels to compare damage.
I do not know your language, but reconized what you are asking from the few words I trnaslated.
Posted on Jan 06, 2010
Hola en realidad no tengo el diagrama pero you te recomiendo que verifique la tableta pricipal por la parte posterior normal mente es muy comun una de las venas del trasistor se fracture observe cuidadosa mente por la fractura ya que si no te equivocaste al conectar el motor no creo que este danado el trasistor recuerda que el Modelo 2740 su motor es de 4 terminales la primera de lado izquierdo es negativo despues positivo sige A y despues B qae estos dos ultimos son para resitencia de velocidad variable 20K
Posted on Jan 07, 2010
Sorry, I don't speak spanish, but try replacing Q609 on the main PCB. It's located on the top, towards the front of the machine.
Also make sure that the motor doesn't have a 'flat spot' (that it stalls). This is generally what blows the Q609 transistor. If you have power to the machine and a cassette in, try manually turning the motor to see if it'll start on it's own.
Posted on Jun 07, 2010
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