REPAIRING AND NOT THROWING AWAY

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 !

Monday 8 April 2019

HOW TO REPLACE THE POWER SUPPLY OF APPLE IMAC 20 INCH

How to replace the power supply of Apple iMac 20 inch


Apple iMac power supply replacement – How to replace the power supply of Apple iMac 20 inch – How to remove the back cover – How to remove the power connections  - How to remove the power supply
Tools Required
Use the screwdriver provided, or a Phillips #1 screwdriver, preferably with a magnetized tip
Flat blade screwdriver
Screw tray or equivalent to hold the screws
Power supply Location
Important Things Remember 
1. A spares kit is included with the replacement part. The kit includes:
# a Phillips #1 screwdriver
# extra screws
2. All customer removable screws are brass colored. Do not remove screws unless they are brass colored, or you will void your warranty.
3. Ground yourself when working on the computer. The procedure will show you how to ground yourself.
4. Do not pull on individual wires when disconnecting a part; pull on the connector.
Opening the Computer
1. Turn off your computer by choosing Shut Down from the Apple menu.
2. Disconnect all cables, and unplug the power cord from your computer.
3. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of the computer and slowly lay the computer face down as shown.
4. Locate the three case screws circled below. You may have to lift the metal foot to locate the middle case screw. 
Note: These screws are captive; they are part of the display/bezel assembly and cannot be removed.
5. Using the tool provided, or a Phillips #1 screwdriver, loosen the three captive screws.
Note: Turn the screws counterclockwise until they stop turning.
6. Holding the back cover by the metal foot, tilt the cover up and lift it off the computer. Set the back cover aside.
Removing the Power Supply

1. Ground yourself. Touch the metal surface (as shown below) on the inside of the computer to discharge any static electricity.
Warning: Always discharge static electricity before you touch any parts or install any components inside the computer. To avoid generating static electricity, do not walk around the room until you have finished installing the part and closed the computer.
2. Locate the power supply  from location picture .
3. Remove the screw on the right and loosen the other two screws by turning them counterclockwise five to eight revolutions. 
Note: The middle screw and the screw on the left are captive; they will not come out of the power supply.
4. Disconnect the power supply cable by pressing the connector release tab and using a wide, flat blade screwdriver to pry apart the connector.
5. Pull on the connector, not on the cables.
6. To unlatch the power supply, tighten the middle case screw by turning it clockwise five to eight revolutions.
7. Lift up the power supply at the sides approximately five mm or until it touches the middle case screw.
8. Tilt up the power supply until it clears the edge of the main circuit board. Lift it out of the computer and set it aside.
For installing the new or repaired power supply go in reverse order 
Posted By: FRANK at 01:41
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