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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Note that if you don't find what you searched for, try it after a period of time; the site is a never ending job !

..............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 !

Showing posts with label XIAOMI. Show all posts
Showing posts with label XIAOMI. Show all posts

Wednesday, 10 April 2019

XIAOMI REDMI 2 – DISASSEMBLING PROCEDURE – HOW TO REPLACE THE MOTHER BOARD

Xiaomi Redmi 2 – Disassembling procedure – How to replace the Mother board

Use the flat end of the spudger to remove the back panel from the mid-frame and front body.
Insert your finger into the curved opening of the mid-frame.
Lift the battery and remove.
Remove the SIM and/or memory cards if present.
Remove twelve 3.4 mm Phillips #000 screws securing the mid-frame to the front body.
Slide the spudger between the mid frame and front body, gradually prying the two bodies apart as you slide the spudger around the perimeter of the phone.
Remove the 3.4 mm Phillips #000 screw that holds the motherboard to the front body.
Keep this screw separate from the initial twelve.
Using one prong of the tweezers, pry back the brown clip located on top of the LCD ribbon connector.
Using one prong of the tweezers, pry the ribbon clip away from the motherboard.
Lift and hinge the motherboard with your fingers.
Using one prong of the tweezers, lift and pry back the metal clip positioned over the front proximity sensor ribbon connector.
Lift the motherboard out of the front cover and set aside.
Remove the 2.9 mm Phillips #000 screw that holds the PCB circuit board to the screen assembly.
Using the tweezers, lift the antenna connector from the PCB circuit board.
Do not remove the PCB circuit board at this time.
Using the nylon or metal spudger, gently pry back the top of the PCB circuit board from the screen assembly.
Using the nylon or metal spudger, pry back the silver clip covering the ribbon connector.

Carefully lift the PCB circuit board from the screen assembly and set aside. The screen assembly is pictured to the left of the circuit board and is now ready for repair or replacement.

XIAOMI MI 4 – DISASSEMBLING PROCEDURE – HOW TO REMOVE REAR CAMERA

Xiaomi Mi 4 – Disassembling procedure – How to remove rear camera

Xiaomi Mi 4: DISASSEMBLING PROCEDURE 
Check to make sure that the device is powered off.
Use a pin or paper clip to insert in the hole on the side of the phone next to the micro SIM cardholder to remove the tray.
Remove the SIM card tray from the Xiaomi Mi 4 and store somewhere safe.
Using the flat metal spudger and curved metal spudger, make a wedge between the plastic back cover and the inner frame.
Using the second spudger, slowly work your way around the perimeter of the device
Check for clicking sounds as you are prying the back cover away from the frame
As the back cover is almost completely removed, use the suction-cup tool to remove the plastic cover without damaging the back
Place the screws on the magnetic mat to avoid losing them.
Use a 3.0 Phillip’s head screwdriver to remove the 10 1.2mm Phillip’s head screws in the plastic frame that held the motherboard and battery.
Use a 3.0 Phillip’s head screwdriver to remove the 3 0.5mm Phillip’s head screws in the plastic frame that held the motherboard and battery.
Use the small plastic opening tool and place it in the slot on the bottom right corner of the inner frame and carefully pry it off.
Look keenly for the connections that run across the battery and are connected to the motherboard.
Use tweezers to gently disconnect the two connectors that are stated in the previous step.
Proceed to gently remove the tape like connector from the battery until it is completely off.
Use tweezer to disconnect battery’s wire from the motherboard.
Use the plastic opening tool to gently pry the battery out of its casing for removal.
With the battery removed locate the left-hand cable connected to the motherboard. With the tweezers, firmly grasp the wires of the connector and gently disconnect the cable from the motherboard.
Find the other cable connecting the motherboard to the device at the top right-hand side of the phone, and carefully use the tweezers to remove that as well.
Wedge the plastic opening tool, between the motherboard and the inner region of the phone in the slot atop the motherboard.
With the motherboard detached from the phone, locate the front camera in the upper left hand corner.
Use a pair of tweezers to disconnect the front-facing camera by popping the cable off of the motherboard connector.

XIAOMI MI 4 – DISASSEMBLING PROCEDURE – HOW TO REMOVE THE BATTERY – HOW TO REMOVE CAMERA XIAOMI MI 4

Xiaomi Mi 4 – Disassembling procedure – How to remove the battery – How to remove camera Xiaomi Mi 4


DISASSEMBLING PROCEDURE 
Check to make sure that the device is powered off.
Use a pin or paper clip to insert in the hole on the side of the phone next to the micro SIM cardholder to remove the tray.
Remove the SIM card tray from the Xiaomi Mi 4 and store somewhere safe.
Using the flat metal spudger and curved metal spudger, make a wedge between the plastic back cover and the inner frame.
Using the second spudger, slowly work your way around the perimeter of the device
Check for clicking sounds as you are prying the back cover away from the frame
As the back cover is almost completely removed, use the suction-cup tool to remove the plastic cover without damaging the back
Place the screws on the magnetic mat to avoid losing them.
Use a 3.0 Phillip’s head screwdriver to remove the 10 1.2mm Phillip’s head screws in the plastic frame that held the motherboard and battery.
Use a 3.0 Phillip’s head screwdriver to remove the 3 0.5mm Phillip’s head screws in the plastic frame that held the motherboard and battery.
Use the small plastic opening tool and place it in the slot on the bottom right corner of the inner frame and carefully pry it off.
Look keenly for the connections that run across the battery and are connected to the motherboard.
Use tweezers to gently disconnect the two connectors that are stated in the previous step.
Proceed to gently remove the tape like connector from the battery until it is completely off.
Use tweezers to disconnect battery’s wire from the motherboard.
Use the plastic opening tool to gently pry the battery out of its casing for removal.
With the battery removed locate the left-hand cable connected to the motherboard. With the tweezers, firmly grasp the wires of the connector and gently disconnect the cable from the motherboard.
Find the other cable connecting the motherboard to the device at the top right-hand side of the phone, and carefully use the tweezers to remove that as well.
Wedge the plastic opening tool, between the motherboard and the inner region of the phone in the slot atop the motherboard.
With the motherboard removed from the device, turn the motherboard over to face the obverse side.
Locate the connector for the rear camera.
Grasp the cable with the tweezers and gently pull up and away from the motherboard to disconnect it.