Curiosity beats fear of failure.
This is a personal story of mine that happen to be in 2020 when I started my work in local FTTH where I was assigned as intern to fix the broken fiber cables from accidents and a general technician intern.
I had a senior technician assigned above me and he could only used the Splicing machines, The machines that are used in such task are high precision devices that cost a ridiculous amount of money.
A scale for such machine is from picture below. It would be size of a tiffin-box and needed to be operated with very delicate order. A small error in main cores would result in system failure in more than 500 nodes.
So, one day we noticed the calibration of machine has been damaged and it is joining fiber endpoints with high error rate which is measures in scale of "db loss"
Which is calculated using this formula :
Total Loss (dB) =(Fiber Length (km)×Attenuation (dB/km))
Connector Loss Splice Loss
The acceptable db loss is 0.1-0.3
And the story is that we have a damaged fusion splicer and this was only device we had for our office and since these devices of super expensive, we had no spare device to work with.
The boss said "This needs to be send to repair to capital city"
And I replied " Can't we just replace the part that is causing the issue?"
He said, "Well but untrained hands like these might damage the entire device, I would rather spend $1000 to repair this one than to buy a new machine for another $12-13k"
Then I made a bet, I downloaded the manual of the product we had on hands from internet and then we just had to replace the splicing pins.
The manual mentioned that pins needed to be soaked in alcohol(spirit) and then replaced. Lastly the device would need to be set up in calibration mode where it would heat up the pins and shoot the beams off of it for significant amount of time.
After it was done with the calibration, we then tested it. Previously the device was showing 0.6-1db loss and now when we tested it, It was showing only 0.1db loss.
It worked, I did it!
we saved time and money doing so and me having no experience in repair or whatsoever.Not even the senior technician knew or had ever fixed it, he didn't even cared what options the device offered.
For me, I was just curious and made a bet against my skills.
In picture : The spilicer machine that we used to work and its quotation for reference.