I’ve got a RB1100AHx2 for which the warranty has expired. However, it’s fully functional and has never been used in a productive environment so you can consider it as almost new.
Now, there is some hiss noise coming from the RB (high frequency noise) once powered on and on load this noise increases in strength. After opening the RB I found that this noise originates from an SMD conductivity component found next to two capacitors where the RAM module is located. This component has the labeling 3R9 and I assume some issue with it, so I would lieke to replace the same.
Is someone familiar with the details of this component and which values are required? A technical specs sheet would be nice.
Caps for Filtering , they Filter Frequency and if they are Not working you can Hear this
But resistors Not often Makes Noise, It is often an coil whitch makes the Noise
By “Caps” you are referencing to the two capacitors? If yes, I have already thought about that and replaced them, however the issue remained. The reason why I believe the issue is with the resistor is because once I press it lightly with my finger, the noise stops. But I believed it to be some SMD conductivity component..
Thank you. I’ve got a reply from MikroTik support as well and after providing the serial number of the RB, they kindly followed up with this info: “It’s an Inductor 3.9uH 20% 4.5A 8.3x8.3x4.5 19mOhm Manufacturer code: BCRH8D43-3R9M-NL”. I will think about what to do next.
