| Electronics > Repair |
| Siglent SDS1202x-E fried FAN driver transistor - SOLVED - |
| << < (4/6) > >> |
| CharlotteSwiss:
Q34 is used to have -10Vdc for the analogue circuits |
| fzabkar:
Is Q34 the pass transistor in a linear -10V AVEE supply? |
| CharlotteSwiss:
I think so, the image is from the Siglent service manual, but it doesn't say anything more. |
| fzabkar:
--- Quote from: CharlotteSwiss on June 22, 2024, 11:16:26 pm ---I think so, the image is from the Siglent service manual, but it doesn't say anything more. --- End quote --- Then it could be a PNP transistor. You need to trace the circuit in this area. |
| tppc:
--- Quote from: fzabkar on June 22, 2024, 11:27:35 pm --- --- Quote from: CharlotteSwiss on June 22, 2024, 11:16:26 pm ---I think so, the image is from the Siglent service manual, but it doesn't say anything more. --- End quote --- Then it could be a PNP transistor. You need to trace the circuit in this area. --- End quote --- I did trace the area : --- Quote from: tppc on January 27, 2024, 05:37:22 pm ---The positive end of the fan is connected to GND. The negative is driven by the Collector or Drain of the fried transistor. The Emitter or Source of the transistor goes to -10V supply. --- End quote --- |
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