Faulty VU meter repair | 0603 Surface mount LEDs | Fostex 160 260 460 X15 R8

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Here is a rather rough video diary I made documenting my first attempt at replacing the broken micro LEDS in a fostex VU meter with 0603 surface mounted LEDs. Honestly it was a pretty long and frustrating process, which requires a hot air resoldering station. The results are actually easier to see than the original VU meter if you're using the unit in daylight, but glaringly bright in low light situations, so at some point I'd like to explore a modification to include a dimmer switch....
Here's the Blog I mentioned inn the video;-
tinyurl.com/363babb6
And here are link to the products I used in the video if you want to get the same ones;-
The hot air rework station
geni.us/HotAirRework
The low temprature soldering paste
geni.us/LowTempPaste
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I prefer to answer questions in the youtube comments where my answers can help more than one person, but if you need to share photos etc, you can message me via facebook.
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CHAPTERS
0:00 Demonstrating the problem
0:43 Detach the white plastic cover
1:35 Examining the original micro LEDs
2:18 Surface mount soldering pitfalls
3:05 Mechanic low temperature solder paste XGZ40
4:13 Hot air resoldering station PJLSW 858D
4:54 Removing micro LEDs & applying (too much!) solder paste
5:48 Visually Identifying SMD LED Cathode
6:51 Surface mount soldering - first attempt - failure!
8:51 Second attempt - sucess!
9:31 Working proof of concept - lessons learned
10:45 Using a 9v battery to test the polarity of SMD LEDs
12:00 Low temperature solder paste and rosin don't mix
12:41 Useful fact - he LEDs are wired in groups of 3
14:05 The finished repair - TOO bright?

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Опубликовано:

12 июл 2024

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Комментарии : 5

@johntammaro Год назад

Excellent. Been waiting for an upload from you. I don't even have this model but still I'm hooked on learning.

@Tetrakan Год назад

Thanks for watching. Yeah its been months and months, but should be a few videos out in the next while....

@richardsmith4992 Год назад

Those LEDs are sooo tiny...my close up sight is pretty good but I would probably use a cheap microscope to do that (plugs into laptop...). Wouldn't a multimeter on diode/connectivity light the LED and give you positive end? There's a silver paste material for fixing traces on PCBs which hardens without heat that might work on this kind of repair, it's quite sticky out of the syringe and dries with a little bit of shrinkage, but I've used it for PCB repairs and it does the job OK where a wire would be difficult.

@Tetrakan Год назад

Thanks for the heads up on that paste, I will look into that. What are you suggesting with the diode mode didn't work with my DMM, but perhaps it would with other meters, especially old-fashioned ones which are plugged straight into the wall? I've always avoided those sorts of meters because I'm afraid that extra current they produce might permanently magnetise the coils in magnetic heads when I'm testing the continuity.