| Electronics > Repair |
| Tektronix DPO7104 repairs |
| (1/9) > >> |
| pasta2018:
When the oscilloscope is turned on, there is a fan that does not turn. It has been confirmed that there is no problem with the fan. Checking the acquisition board, the measurement found that the input terminal of the U1750 (LT1963) was shorted to ground, and the measurement found that the two ends of the C1750 were also short-circuited. May I ask who has DPO7104, please measure whether these two ends of the normal instrument are short-circuited. |
| pasta2018:
I removed the acquisition board and tested it again, and found that there was no short circuit. It seems that the short circuit before the test may be caused by the power interface board. |
| pasta2018:
It's really interesting, and then disconnect the power interface board from the mother board, then I find that the mother board 3.3V is short-circuited with GND |
| squadchannel:
Check again with the acq board alone and nothing connected. |
| pasta2018:
Thanks,now I can confirm it's the mother board failure. 3.3V out is shorted to GND. |
| Navigation |
| Message Index |
| Next page |