Electronics > Beginners
Can't see all a component with an Amscope se400-Z
nbenm:
Hi everybody,
I've just bought an Amscope SE400-Z.
I want to solder a tqfp 100 pins IC, but I can't see it all. I see only parts. So it's difficult to place it correctly on the board.
Is there a way to see all the component at once ?
Thanks in advance.
Noury
rstofer:
You would want to select 10x and not 20x. Then you might try to move the head as high as possible while still attaining good focus. That's about all you can do with the microscope.
What you might want to do is pay attention to the corners. Tack down opposite corners to get the chip positioned and then solder each row of pins. Sometimes you can do this with just a simple visor type magnifier.
janoc:
You have bought the wrong tool for the job, sadly. That's the bad news.
Now the good news - that microscope has replaceable lenses, both the objectives and oculars (eyepieces). Go back to Amscope and get a combination that will give you about a 5x to 10x total magnification, that's what is the most useful for general work.
I have the same microscope and I have asked the UK seller to replace the stock lenses with 1x and 2x objectives (there were two sets in the kit) and 5x and 10x eyepieces, giving me the range from 5x to 20x magnification - which is plenty for soldering and inspection. The original had like 40x magnification which is completely useless for this type of work. Most often I am using only the basic 5x, changing to 10x only to work with very very tiny components (plus changing the lenses is a hassle on this scope, requiring removing tiny setscrews - but you do get what you pay for ...)
Your 10x is way too much if you want to see a huge component like TQFP 100 in its entirety. Even at 5x it may not be possible or it will be really just.
ataradov:
It is the right tool. I use this microscope and it works fine, but with 10X lenses at most. And I think the last time we figured out that it is actually 5X overall magnification.
There is no need to see all of 100 pins. You can align the part pretty close on one corner, then solder one pin, go to the opposite corner, align the pins there (with experience no changes will be necessary), and solder one pin there. Now solder the rest of them.
Bud:
What will help is a 0.5x objective lens but i do not know if Amscope makes it for your scope model. With a 0.5x lens you get a wider field of view.
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