REPAIRING AND NOT THROWING AWAY

Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and technical information about Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....

If you go into the profession, you will obtain or have access to a variety of tech tips databases HERE IT IS Master Electronics Repair !.

These are an excellent investment where the saying: 'time-is-money' rules. However, to learn, you need to develop a general troubleshooting approach - a logical, methodical, method of narrowing down the problem. A tech tip database might suggest: 'Replace C536' for a particular symptom. This is good advice for a specific problem on one model. However, what you really want to understand is why C536 was the cause and how to pinpoint the culprit in general even if you don't have a service manual or schematic and your tech tip database doesn't have an entry for your sick TV or VCR.

While schematics are nice, you won't always have them or be able to justify the purchase for a one-of repair. Therefore, in many cases, some reverse engineering will be necessary. The time will be well spent since even if you don't see another instance of the same model in your entire lifetime, you will have learned something in the process that can be applied to other equipment problems.
As always, when you get stuck, checking out a tech-tips database may quickly identify your problem and solution.In that case, you can greatly simplify your troubleshooting or at least confirm a diagnosis before ordering parts.

Happy repairing!
Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

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..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

©2010, 2011, 2012, 2013, 2014 Frank Sharp - You do not have permission to copy photos and words from this blog, and any content may be never used it for auctions or commercial purposes, however feel free to post anything you see here with a courtesy link back, btw a link to the original post here , is mandatory.
All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Wednesday 10 April 2019

ASUS ZENFONE 2 – DISASSEMBLING – HOW TO REPLACE THE MOTHER BOARD

Asus ZenFone 2 – Disassembling – How to replace the mother board

Detach the battery from under the motherboard. Remove from the device.
Use your fingernail to gently pry off the phone's back cover at the indicated location. While your fingernail is under the back cover slide your finger around the edges of the phone until the cover pops off.
Remove the thirteen black screws and the single silver screw from the back of the phone with a JIS size 00 screwdriver. The black screws are 2.8 mm in length.
The silver screw is 5.5 mm in length.
The black screw next to the camera and the flash is covered by a sticker. This screw can be easily removed as if there were no sticker on top of it. The point of the screwdriver should be able to pierce through the sticker easily.
Use a plastic opening tool to remove the inner phone backing.
The parts of the inner backing held down by two strips of double sided tape can be easily loosened by inserting the plastic opening tool underneath it and gently lifting it up.
Note the position of the speaker unit so you can replace it in the correct place during reassembly.
Take the speaker out of the back of the phone. It should come out easily as soon as the inner back is removed because nothing is holding it down in place anymore.
Use a plastic opening tool to gently pry up both ends of the antenna.
Carefully remove the antenna wire from the plastic keepers along the side. Note their position for reassembly.
The antenna connections can be easily bent out of shape. Be sure to lift from underneath the cable as shown.
Using the plastic opening tool, unlock the ribbon cable attaching the battery to the circuit board by prying up the yellow tab.
Using a plastic opening tool, gently pry the vibration motor from its mount.
Gently remove the circuit board from the phone by gently pulling it away from the bottom of the phone.
Using the plastic opening tool, disconnect the ribbon cables from their connectors by gently prying them up.
Carefully remove the battery pack from the phone using your hand. The battery is glued in placed by a strip of adhesive on the top side so some force may be necessary.
There are fragile tabs on the left and right side of the battery, be careful not to break them off.
Using a plastic opening tool, lift the copper sheet heat strip from the body of the phone by sticking the tool into one of the upper corner of the copper sheet and slowly sliding it along the edges.
Be careful not to rip the copper sheet.
Using a plastic opening tool, unplug the ribbon cable indicated in the picture.
Using a plastic opening tool, disconnect the display cable from the side of the motherboard by carefully sticking the tool underneath the display cable and gently pulling outward.
There are four black plastic retainers, two on each side, that keep the motherboard fix in place. To get the motherboard out, stick a plastic opening tool under one top corner of the motherboard and carefully lift upward using a small amount of force to pop this side of the motherboard out of the plastic retainers.
Be careful not to break the black plastic retainers as these are needed to put the motherboard back in place.
Once one side of the motherboard is out of the black plastic retainers, remove the whole motherboard from the phone.

The motherboard should come out easily once one side of it is freed from the black plastic retainers.