Repairing Acer AL2216W Capacitors
Repairing Acer AL2216W Capacitors Repairing Acer AL2216W Capacitors Replace bad capacitors on your Acer AL2216W display power supply. Written By: Nick INTRODUCTION If your Acer monitor is acting up, you probably have a case of bad or failing capacitors. Here are some signs of bad capacitors Power issues No power Video issues(stability, doesn't stay on when plugged into a computer, resolution, random image dropping, etc.) auto adjustment issues Power light flickers slightly Random problems it has to be unplugged from the wall frequently Transformer hum* Inverter hum* *If you have any of these problems, replace all the caps no matter the condition of them. In mine I found 2 that didn't look bad blew from the bottom. This is reason enough to say this. This one is having automatic adjustment issues, power issues when hooked up to a computer and transformer hum problems. I already took this apart to check the capacitors, so it will be easier then one that was never opened before. This monitor can be a pain the first time. If you injure yourself performing this repair, I will not take responsibility for your actions! You have been warned to follow ALL safety instructions provided to avoid injury if inexperienced with high voltage equipment! © iFixit — CC BY-NC-SA www.iFixit.com Page 1 of 17 Repairing Acer AL2216W Capacitors TOOLS: PARTS: Flathead Screwdriver (1) 16v 2200uf capacitor (1) Soldering Station (1) http://www.amazon.com/2200ufCapacitor-105c-RadialLeads/dp/B004C53SBM/ref=sr_1_6? ie=UTF8&qid=1391369372&sr=86&keywords=10v+2200uf+capacitor Solder (1) Rosin Flux (1) Flush Wire Cutter (1) 35v 220uf capacitor (2) 60/40 Leaded Solder (1) http://www.amazon.com/Rosin-Core-Solder-604oz/dp/B0006O933K/ref=sr_1_7? ie=UTF8&qid=1426034057&sr=87&keywords=60%2F40+solder http://www.amazon.com/220uf-35vdcCapacitor-RadialLeads/dp/B0059J5BZG/ref=sr_1_4? ie=UTF8&qid=1391369568&sr=84&keywords=35v+220uf+capacitor 10v 1000uf capacitor (1) http://www.amazon.com/1000ufCapacitor-105c-RadialLeads/dp/B0052GRKZU/ref=sr_1_2? ie=UTF8&qid=1391369660&sr=82&keywords=10v+1000uf+capacitor 35v 1000uf capacitor (2) http://www.amazon.com/1000ufCapacitor-105c-RadialLeads/dp/B004C4TV8W/ref=sr_1_1? ie=UTF8&qid=1391369764&sr=81&keywords=35v+1000uf+capacitor © iFixit — CC BY-NC-SA www.iFixit.com Page 2 of 17 Repairing Acer AL2216W Capacitors Step 1 — Capacitors Unplug the cables from the monitor and let it sit for at least 24-48 hours. This is a required step to drain the power supply. 48 hours is usually sufficient for LCD monitors. If you ordered your capacitors online, don't open it until they come to allow additional discharge time. Failure to follow this can result in injury, or even death. The capacitors can hold quite a bit of energy, especially the filter capacitor! If you do not follow this, you run the risk of injury or death! If you can't do this safely, or don't feel comfortable, have somebody else repair it for your own good! If you follow any warnings given, you should be fine. If you injure or kill yourself performing this procedure on the AL2216W, you're on your own!!! © iFixit — CC BY-NC-SA www.iFixit.com Page 3 of 17 Repairing Acer AL2216W Capacitors Step 2 Remove the stand from the monitor. The 4 screws that have to be removed are circled. This monitor is missing the hinge cover. If you have one on yours, just snap it off with your fingers. Here's my shopping list for retail capacitor purchases. If you don't see them at the time double them further, but make sure they'll actually fit. It's designed to be printed on an index card that's 3x5" for portability. Step 3 Remove 4 fine threaded screws from the back of the monitor. This screw is different from the other 4 screws. Keep it separate from the other screws. © iFixit — CC BY-NC-SA www.iFixit.com Page 4 of 17 Repairing Acer AL2216W Capacitors Step 4 On the bottom of the monitor, you will find 4 slots. Stick a flathead screwdriver in and gently twist it to loosen them. If you have to use force to open the monitor, don't use any more force than you need to. Step 5 With the monitor dealt with on the bottom, it's time to deal with the sides. Use a small flathead screwdriver or nonmarring pry tool on the sides of the monitor. Do this for both sides. If you use a flathead screwdriver, try not to damage the plastic. © iFixit — CC BY-NC-SA www.iFixit.com Page 5 of 17 Repairing Acer AL2216W Capacitors Step 6 At this point, you are almost to the power supply. Now is the time to decide if you can safely do this. With the back off, remove the 2 screws on the connector for the power supply. Step 7 Remove the 4 pins for the video cables from the monitor. © iFixit — CC BY-NC-SA www.iFixit.com Page 6 of 17 Repairing Acer AL2216W Capacitors Step 8 Disconnect the cables for the backlight inverter from the power supply. Step 9 Disconnect the data cable for the button board from the monitor. © iFixit — CC BY-NC-SA www.iFixit.com Page 7 of 17 Repairing Acer AL2216W Capacitors Step 10 Remove the 2 screws holding the bottom plate on the monitor. Step 11 On the right side of the monitor, remove the screw securing the power supply shield. © iFixit — CC BY-NC-SA www.iFixit.com Page 8 of 17 Repairing Acer AL2216W Capacitors Step 12 Remove the top screw on the power supply shield. Step 13 Lift up on the lower plate to remove the power supply shield from the monitor. © iFixit — CC BY-NC-SA www.iFixit.com Page 9 of 17 Repairing Acer AL2216W Capacitors Step 14 © iFixit — CC BY-NC-SA www.iFixit.com Page 10 of 17 Repairing Acer AL2216W Capacitors As you keep that plate lifted up, maneuver the shield covering the power suppy and control boards up. After you have this removed, identify the power supply. After you identify the bad capacitor, make sure you get the right one, or the capacitor will explode when the monitor is turned on. You can go up in voltage and uF ratings as much as you want, but the new capacitors have to fit in place where the old capacitor is. Capacitors as of 2013(when I did this) are much smaller then the factory ones, so you can go over more easily and fit them now. You can not go under on uF or voltage, or the capacitor will explode. The original capacitors Acer used go as follows:2x 25V 1000uF capacitors, 1x 10V 1000uF capacitor, 2x 25V 220uF capacitors if you intend to match the factory specified capacitor ratings. If you double them, make sure you exceed the original uF and voltages and not go under or they will fail when the monitor is turned on. If any of the capacitors have bulged, they may still have a charge. Handle the power supply with extreme caution! © iFixit — CC BY-NC-SA www.iFixit.com Page 11 of 17 Repairing Acer AL2216W Capacitors Step 15 Remove the 4 screws from the power supply. The screw at bottom left is larger and will fit only in this hole. This screw has to go in this exact place when you replace it. Step 16 Lift up on the power supply just enough to clear the screw mounts, and wiggle the power supply out of place. There are multiple revisions of this power supply. If your power supply has this capacitor, it has to be changed. © iFixit — CC BY-NC-SA www.iFixit.com Page 12 of 17 Repairing Acer AL2216W Capacitors Step 17 You may wish to mark the lead polarity on the back of the power supply board with permanent marker, and use this to install the capacitor, as to avoid putting it in wrong. Putting the capacitor in the wrong way will cause the capacitor to explode. Permanent marker on the solder mask will not affect the rest of the board. Step 18 Put solder flux on the leads of the bad capacitor. You will have to put flux on a few times during this repair. Put flux on as often as you need. Use more then this, too and do not be afraid to put it on liberally. © iFixit — CC BY-NC-SA www.iFixit.com Page 13 of 17 Repairing Acer AL2216W Capacitors Step 19 Put the soldering iron on the points where the bad capacitor(s) are soldered, and push on the capacitor to remove it. Removal of the old capacitors doesn't have to be pretty now, because we will have to remove the old solder. A full recap should be performed as preventive repair work for any future failures capacitor failures, since Acer uses CapXon capacitors in their displays, and when CapXon capacitors fail, others follow quickly. lifting the board up with one hand and removing the old capacitor as you go makes this much easier to do. Here is how to solder the new capacitor in: How To Solder and Desolder Connections © iFixit — CC BY-NC-SA www.iFixit.com Page 14 of 17 Repairing Acer AL2216W Capacitors Step 20 With a desoldering braid and flux, put he desoldering braid down on the solder joint and let it absorb the old solder from the hole to add new solder in place of the old solder. Use the flux on the board from the removed capacitor to your advantage, as this will ease removing the solder. Step 21 Place the new capacitor in the holes you just made with the desoldering wick. You may want to bend the leads a little bit, to keep the capacitor in place. It's VERY IMPORTANT to match the capacitor polarity, or the capacitor WILL EXPLODE when power is applied! If you use this to refurbish the monitors professionally, please note if you use lead solder, you will ruin the RoHS status of this monitor, and will not be able to sell them in California. You will need to use RoHS solder in California if you intend to resell the monitor. © iFixit — CC BY-NC-SA www.iFixit.com Page 15 of 17 Repairing Acer AL2216W Capacitors Step 22 Solder the new cap in the board, and cut the leads to prevent any shorts. Repeat this with all of the capacitors. Sometimes flux burns when heated up. The power supply will be fine if this happens. You can replace the filter capacitor on the AC in side if you so desire. Bear in mind this capacitor gets the least stress so you don't need to unless it's bad. Replacing it will add 510.00 to the repair, generally. Step 23 Clean the board with 91% rubbing alcohol to clean off any flux residue Now is the time to check for cold solder joints before reassembling the monitor. If you see any, fix them before reassembly. © iFixit — CC BY-NC-SA www.iFixit.com Page 16 of 17 Repairing Acer AL2216W Capacitors Step 24 Put the monitor back together and test the repair. In this case, I got this Acer AL2216W working again. To reassemble your device, follow these instructions in reverse order. This document was last generated on 2015-05-29 10:32:14 AM. © iFixit — CC BY-NC-SA www.iFixit.com Page 17 of 17
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