The 45W really made things easier. I managed to finally replace the 5 bulging caps on one of my 8K7A boards. Having never soldering before this, I was surprised when the thing actually booted back into windows without any issues when I put the computer back together.
I found that soldering is pretty easy, and desoldering is not so bad either. But if the hole gets filled with solder after a cap is removed it becomes a nightmare to clean the hole in preparation for a new cap. I eventually got out a sowing needle and just picked away at the hole until it was clear for one particularly stubborn hole.
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I got the 45W radioshack iron with the built-in bulb sucker thing today. While it does make removing the caps a ton easier, I still can't get the holes clear of solder enough to put new ones in...Leave a comment:
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a 15w iron wont do squat on a mobo.
i use a temp controlled station or a 60w iron with a wide tip that will heat both leads at once.Leave a comment:
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What? I got a 15W when people were telling me 5-10W would be enough and I wouldn't want to damage the board with excessive heat. Radioshack's least amount of Watts was 15 so I get that one, and now you're telling me it can't even melt the solder because the board is too big?
Anybody know where I can get a replacement tip that is 1mm wide diameter and about 5mm or so long, just a straight cylinder, not a cone shape, so I can just stick the whole tip into the hole?Leave a comment:
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you need a hotter iron.
the heat is getting soaked up by the inner ground traces.
dont pull the caps out till the solder is completely melted all the way through or you will pull out the through hole and ruin the board!Leave a comment:
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Desoldering?
Desoldering is hard, any tips? I found if you melt a fresh blob of solder over the lead it can help conduct heat down, but it can still be hard to melt all of the solder enough to pull out the old cap. Either the motherboard spreads the heat out too much or the solder Epox used on my board doesn't melt at as low a temp as the 60/40 rosin solder I have to resolder things back on with.
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Problem
This is an LG edge LED lit LCD Display. The LEDs are on the bottom edge of the display. There are 2 bars (left and right) Each bar has many LEDs and a 6 pin connector. Each pin drive several LEDs thus is the highest current flow / heat junction. The weak lead free solder gradually fails with thermal expansion/contraction cycling and increases resistance. PSU will compensate up to a point, then when the current is too high, PSU just shut down the backlight causing a dark display. I have even seen one which the connector just fell off as solder points became completely detached.... -
Hi,
solder joints on heat sinks - how much do they matter? Could poor joints on heat sink cause issues if they are not properly joining to hot ground?
I'm looking at power source module of Panasonic plasma TV and I see many of these having visually poor quality, but could they matter? In general I would guess no, but I saw a video where someone was stressing out the importance of tightening the screws when fastening the power source board specifically for the ground to be connected properly.
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This is a guide that I am writing for helping others to replace their MEC1503 EC chip if it breaks (or to get around an inconvenient prompt to the BIOS). This forum has been extremely helpful to me so I would like to contribute to help others. I will tell you right now that this task is very difficult to do. You MUST have experience and tools to do precision micro-soldering, BGA reballing, trace repair, and general laptop repair skills.
There are some specialty tools needed to do this task. The replacement MEC1503 chips can be acquired from Aliexpress. Do not buy the bare chips as... -
Yesterday I successfully repaired a Middle Atlantic UPS2200R-IP that had inadvertently been used as a surge suppressor at our transmitter site. It has already been replaced with an updated one but it's coming home with me now instead of being e-cycled. To be specific, this is the MA model that has the blue backlit display and has been discontinued, although this design may have been used in many UPS units including the smaller Middle Atlantic ones in this series.
Here's what happened: We experienced a brownout/surge at the site, which damaged the UPS and took our broadcasting... -
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
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