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JTV-89f no Variax no Workbench red Led

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No Variax/Do not connect to Workbench/USB flashing red.


-DSP is changed.


-Tested with Cabled power kit=no difference

-Paper trick/removal of hat on knob=no difference

-Tone/volume and standard pickups=Ok

-Watchdog seems to be up and running (U12/pin 2)


TP1: -4.5v

TP2: 3.28v

TP3: 4.9v

TP4: 1.0v

TP6: 3.28v


U17(pin 21): 3.3v

TSR jack: 3.3v (Pin 2/J7)

The only thing I notice is that LED under modelling knob turns red once when you insert the tele-connector. But...pushing knob wont turn on Variax functions.


Please help



Niklas Eriksson 


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