JYE Tech Forum

hi, my DSO138 all at once stopped running and i see no trace. I mesurad and found these values: AV = 4.18V V+ = 9,3V V on R4 =0 VbQ2 = 0 R39 = 9962 ohm R40 = 470 ohm Vcb (and Vbe (Q2) = 0,69 V Vb1 = 8,52 V Vc2 = 8,52V What can you tell me? Some component is broken and i can change it or i must buy a...