udhay_cit
Full Member level 6
Hello Thejdman01,
Prior to removing the zener diode or any other component, was there brown
glue touching or over the zener, especially around the component pigtails?
Since that area has seen a fair degree of heat over the years, there's a good
chance the glues properties have changed it enough to make it partially
conductive.
Please check the link regarding glue issues found on PCB's: HERE
Before replacing any parts, I would remove ALL signs of the glue. Even
ensure you clean it up on both PCB's.
It wouldn't hurt to measure all the grey colored 2 watt safety resistors to make
sure none have gone open circuit or high.
Regards,
Relayer
I don't know the conductivity of the glue in PCB's, but I don't recommend to remove the glues or at the least we have to replace it with a proper glue or silicone sealant. The whole circuit is inside a fan and the components & wire connections will be disturbed with the vibration. So don't remove the glues. It will create problem for long run.
Udhay