| Title: | Home_work |
| Notice: | Check Directory (6.3) before writing a new note |
| Moderator: | CSLALL::NASEAM::READIO |
| Created: | Tue Nov 05 1991 |
| Last Modified: | Fri Jun 06 1997 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 2100 |
| Total number of notes: | 78741 |
I'm trying to replace an IC in my stereo...and needs some tips on
how to keep out of trouble...The IC has 8 pads?(it's the power amp)
It's glued to a heat sink and the pads are soldered to the curcuit
board. I have an old soldering iron, heat sink compound, and solder
wick. ........HELP!
Tom Mast@mro
dtn 297-6281
csteam::mast
home 603-329-6358
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 750.1 | QUARK::LIONEL | Free advice is worth every cent | Mon Dec 02 1991 19:06 | 4 | |
I suggest asking in the CSOA1::ELECTRO_HOBBY conference. Be careful - you can do more harm than good with very little effort! Steve | |||||
| 750.2 | use an IC socket | AKOCOA::CWALTERS | Wed Dec 04 1991 16:22 | 22 | |
But he's got nothing to lose, as it's currently just so much
electronic scrap!
How is the heatsink connected to the existing IC? I had a similar
problem, but the heatsink was simply stuck on top of the IC with
conductive paste and held by a clip, so the device was easy to
remove.
If your set-up is similar, and if you have the headroom in the Amp
then just CUT away the old IC with fine wire snips. Instead of soldering
in the new component, surface-mount an 8-pin IC socket (tandy) and
install the new IC in the socket.
This way, the biggest risk is with any adjacent components, so make
sure you keep the heat away from them. (And don't forget to earth
yourself to prevent static.)
Regards,
Colin
| |||||
| 750.3 | Not too many watts!!! | JUNCO::CASSIDY | Mission: Repair with care. | Thu Dec 19 1991 08:41 | 6 |
What is the wattage of the soldering iron? You should be using something between 25 and 50 watts. Too hot and you'll probably start wasting components. Tim | |||||
| 750.4 | NORYL::KOZAKIEWICZ | Shoes for industry | Fri Dec 20 1991 18:31 | 10 | |
re: .3
It's not the wattage but tip temperature and the size of the pad you
are soldering. Ungar makes (used to make?) a nice little 15 watt iron
which had a tip temperature of 750 degrees (which how they were able to
pump 15 watts into a tiny piece of metal). If you weren't careful, you
could easily lift pads from circuit board with it.
Al
| |||||
| 750.5 | Well, you know what I meant (didn't you?)... | ESKIMO::CASSIDY | Mission: Repair with care. | Tue Dec 24 1991 02:29 | 3 |
Okay, a technicality. I suppose I was generalizing, but the jist is the same - don't use too much heat. | |||||