Question about Gateway MX3228 Notebook
When I de-soldered the power jack from the little PCB, capacitor C2 fell off. I am going to pick one up tomorrow, but I have no idea what the capacitance is. I can remeber the size since I can look at the pads on the PCB, but I don't want to put the wrong in. I phoned tech support, but they would want to charge me for their help. If someone knows where I can find a schematicn for my gateway laptop, model # MX3228, I would be most appreciative
The capacitor is most likely an electrolytic type, these are a round cyclinder device and they are polarised. From its location near the power jack it is most lkely more than 50uF and more than 20V. The information on the capactance and voltage of the capacitor is printed on the capacitor. If you are going to purchase a new one, make sure you get an exact replacement because if it is bigger in value eg. microfarad and voltage it will be too big to fit on the motherbard and if it is a lesser value, it will fail and not perform as required.
The capacitor is polarised eg + & - legs on the capacitor and these must be soldered in the correct direction on the motherboard, the white stripe on the capacitor marks the negative lead of the capacitor.
If the capacitor fell off during de-soldering of the power jack, you must have applied too much heat for this capacitor to fall off. If the capacitor is not damaged you could solder it back on the motherboard.
You should be using a temoerature controlled soldering iron, applying excessive heat to a motherboard can damage the motherboard as these boards are multilayer boards, there are circuit tracks on top, below and in the middle of the board. make sure you don't put solder across printed circuit tracks, carefully check the motherboard under a magnifying glass.
Posted on Dec 29, 2008
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Nov 29, 2011 | Rheem Paloma PTG-74PVN / RTG-74PVN...
Sounds like some bad
electrolytic capacitors, it's easily fixed. I highly recommend
reading the links at the bottom, it'll give a you a better insight
into the problem and solution.
You have 2 or 3
1. If it's under
warranty then you could send it back to be fixed, problem is they
will likely use the same rubbish brand of capacitors again, but
anything else will void the warranty.
2. Pay a tv repairman
or similar to fix it for you. They may still use substandard
capacitors, so specify what brand you want them to use, this will
probably mean waiting longer and possibly paying a little more. This
way you know the job should be done right.
3. You could replace them yourself if you're comfortable with a soldering iron, or know someone who is. The capacitors themselves are quite cheap and easy to replace.
Go for the best ones
you can get for the job and try to buy from reputable companies, the
links below will help you chose but you can't go wrong with Rubycons.
Every capacitor manufacturer has several ranges, each having
different properties which make some more suitable than others
Always match the values
on the original capacitors. You can actually use slightly different
values for the capacitance and voltage (uf and v) but never use ones
below what the originals are rated at.
The links below will
explain this further.
They should look something like this:
As you should be able to see, the one on the left is bulging. The blue stripe with the arrow tells you that the lead on that side is the negative, the positive lead should also be longer than the negative one.
1. Soldering iron. - preferably with a stand with a sponge in.
2. Solder - there's different types so make sure it's suitable for electronics
3. Phillips screwdriver
4. Flat head screwdriver
6. De-soldering wick, or pump. - definitely recommended but not really essential.
If you haven't already got the tools then it's a good investment, as bad caps cause a lot of faults in all kinds of electronics.
1. Unplug monitor and open case.
2. Identify power board, it should have a lot of electrolytic caps on there and obviously should be connected to where the power lead is attached.
3. Identify the bad caps, they should be bulging and/or leaking, although not always. Note down the three values for each cap (eg 220uf, 16v, 105c) and their approximate dimensions, and get new ones, preferably Rubicon or Panasonic, the link below will help you chose some good ones. If in doubt you could remove them and take them to the shop, but you'll have to remember where each one goes and which way round it was (take pics).
4. Very carefully heat up the contact on one side with the soldering iron, and rock the cap the other way, then do the other side, keep doing this until the cap comes out, if you have a de-soldering wick/pump use it to remove the solder and it should just pop out easily.
4. Replace with new cap, making sure that you observe the polarity and make sure it's securely seated and soldered in. Make sure the solder is neat, tidy and doesn't contact anything else. If there's any solder left in the holes then you'll have to heat it up or remove it before you can get the new cap's leads through. Once done properly trim the leads off so they won't cause any problems.
5. Replace casing and test. If it doesn't work then you'll have been a bit messy with the solder, tidy it up and try it again.
Here's a few links to help you:
Bad caps faq - should have pretty much everything you need to know.
Hints on soldering.
Jan 23, 2011 | Dell E193FP 19" LCD Monitor
Jul 20, 2010 | HP Pavilion dv7-1240us Notebook
Jul 12, 2009 | Gateway MX3228 Notebook
Apr 20, 2008 | Philips HTS3450 System
Mar 27, 2008 | Dell E172FP 17" LCD Flat Panel Monitor
Mar 17, 2008 | Philips HTS3450 System
Dec 02, 2007 | Philips HTS3450 System
Sep 22, 2007 | Philips HTS3450 System
Apr 09, 2009 | Gateway MX3228 Notebook
69 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: