Re: Conformal Coating on control boards not allowing me to solder
No, I should of said Medical Research Electronic Devices
No, I should of said Medical Research Electronic Devices
-
-
Re: Conformal Coating on control boards not allowing me to solder
Hi.. as per my experience a lot of boards use solder with no flux in it so when you desolder a part use need to apply liquid flux first before you can heat up the joint. If the conformal coating was applied correctly it should not cover the solder joints. If it is covering the solder joints and you only need to desolder one cap you can use an X-acto knife to scrape of the coating just on the solder joints to get to the solder connection.Comment
-
Re: Conformal Coating on control boards not allowing me to solder
Well yes, conformal coating should cover everything (soldermask is probably the main thing that does not cover solder joints... but conformal coating should cover soldrermask) I don't think solder actually rusts or at least it does not rust quickly. However, through hole components tend to have steel leads...Comment
-
Re: Conformal Coating on control boards not allowing me to solder
leadfree solder is 99+% tin, i'v seen it rust outside.Comment
-
Re: Conformal Coating on control boards not allowing me to solder
It would require a bit of scraping and high temperatures if tin actually "rusted" but tin IV oxide should be off white in color. If you see any red/brown, that's the iron in the through hole pins of many resistors/capacitors.
Tin should generate a passivization layer that makes it react extremely slowly to water much like aluminum.Comment
-
Re: Conformal Coating on control boards not allowing me to solder
leave an old (leadfree) pcb in the garden / on the roof for a month - see what i mean.Comment
-
Re: Conformal Coating on control boards not allowing me to solder
How about the solder by itself, perhaps just soak it in water? Don't want to introduce copper and steel stuff that's in the rest of the components that are known to corrode.Comment
-
Re: Conformal Coating on control boards not allowing me to solder
maybe.
try it - stick a bit on a window ledge.Comment
-
I just acquired this portable aircon, history unknown. Its behaviour is quite strange:
- When turned on and placed into cooling mode, the upper fan (cold air out) just spins slowly. The compressor and lower fan do not run.
- If the device is then placed into heating mode and then back into cooling mode, the lower fan and compressor kick in and start cooling, but the upper fan still only spins slowly.
- If the device is placed into fan-only mode, the upper fan does not respond to low/medium/high speed toggles - just keeps running slowly.
- Display and buttons all behave normally aside from the
-
I have a Samsung U32D970 monitor from 2015 I pulled out of the bad hardware pile that turned on and then turned itself back off after a few minutes of use and refused to turn back on. The PSU has part number BN44-00786A, and I found a couple posts about one that had blown with damage to the MOSFETs and PWM controller - but nothing about intermittent failures. I started a new thread and said that I would refresh the solder joints on the board to see if it was just a bad connection and possibly replace the PWM and PFC ICs. I then asked what my next course of action would be after those steps. I... -
Hello, I'm a beginner for micro soldering. Right now I have some difficult to solder a qfn 20, I guess I put too much solder on the thermal-ground pad, the result is a corner of chip wich don't touch the board (last try).
I use a wire solder with hot air, I tin the board and chip before with iron and I use good flux.
I will have to solder a LVDS connector (40 pins, laptop pc), I saw a solder paste in seringe, good quality (it does not scatter).
See the test :
https://youtu.be/bNAzC-EvqHs?t=1767
With hot air from bellow the board, that's... -
REWORK FLUXES Multifix 425-01 and 450-01 are tacky fluxes designed for use in a wide range of electronics assembly and rework processes. They represent a range of activities and residue levels to meet different customer requirements.
- No Clean Formulations
- Low residue
- Range of activity to deal with different component solderability
- Halide free
- Suitable for dispensing
- Compatible with solder coatings and/or No Clean flux cored solder wire product range
Both products are supplied in syringes or cartridges for application by dispensing....10-07-2024, 06:02 AM -
I got this set for very cheap, it works perfectly but the catch is that the protective coating was damaged. About 45% of the screen had a green tint, you can see exactly where the layer changed colors to a blueish tone (that actually makes everything green).
"Ok, that's probably just the anti-glare layer" - I thought. So using a microfiber cloth and automotive metal polish I was easily able to turn it into a nice mirror.
Unfortunately, the damage was beyond this layer and everything still had a horrible green tint. I initially...
Comment