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Ok! Where is the best place to check these tensions?Power supplies...
Ok i found T503...must i checked voltage on each pin with scope?1. Find component T503 on the schematic and the PCB layout.
2. Notice on the schematic that T503 has two supply inputs (marked as +IN and -IN).
3. Stick your oscilloscope probe on each of these points in turn.
4. Measure the voltage rail ripple.
Simple as...
Dave