| Electronics > Repair |
| CMU200 Rx level issue / failed loop test |
| << < (12/15) > >> |
| DavidAzulay5000:
The mission fails :( I changed the filter twice B39841B4122U410 836MHz SAW Filter SMD In addition, 2 SMD resistors accidentally flew that I de soldered using a hot air station I looked at the pictures I took before I'm really mad at myself for not taking a clean picture of this area From what I've seen resistors are 100 OHM 1 KOHM The filter I ordered does not pass the internal test I will try to reverse the polarities I have no idea what input is and output of the circuit I'm really starting to hate R&S There is no schematic |O |
| DavidAzulay5000:
--- Quote from: DavidAzulay5000 on February 06, 2023, 06:01:14 am ---The mission fails :( I changed the filter twice B39841B4122U410 836MHz SAW Filter SMD In addition, 2 SMD resistors accidentally flew that I de soldered using a hot air station I looked at the pictures I took before I'm really mad at myself for not taking a clean picture of this area From what I've seen resistors are 100 OHM 1 KOHM The filter I ordered does not pass the internal test I will try to reverse the polarities I have no idea what input is and output of the circuit I'm really starting to hate R&S There is no schematic |O --- End quote --- |
| DavidAzulay5000:
|O |
| _Wim_:
Hi, where did the resistor come from in the attached picture? |
| _Wim_:
And maybe a few other questions: do you measure any resistance between pin 2 and pin 5 of the filter? How does that resistance compare to a brand new filter? |
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