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

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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

LENOVO YOGA BOOK – HOW TO CHECK THE AC ADAPTER – HOW TO CHECK THE BATTERY – HOW TO REPLACE THE BATTERY – HOW TO DISASSEMBLE THE KEYBOARD

Lenovo Yoga Book – How to check the AC adapter – How to check the Battery – How to replace the battery – How to disassemble the keyboard

Lenovo Yoga Book
Checking the Tab AC Charger
To check the IdeaTab AC Charger, do the following:
1. Disconnect the micro‐USB cable from the tablet.
2. Measure the output voltage across the connector marked B of the micro‐USB cable. Refer to the following figure:
Note: The output voltage across pin 3 of the micro‐B connector might be different from the one you are servicing.
3. If the voltage is not correct, replace the micro‐USB cable.
4. If the voltage is acceptable, replace the main board.
Checking the internal battery status
To check the battery status of the tablet, do either of the following:
Approximate information about the battery status
Get the approximate status of the battery at any time by checking the battery status icon on the system bar in the upper‐right corner of the screen. The shorter the green bar is, the less the battery power remains.
Accurate information about the battery status
To get the accurate information about the battery status of the tablet, do the following
1.Open the Android Settings screen.
To open the Android Settings screen, do either of the following:
# From the main Home screen, touch the Android Settings icon on Lenovo Launch Zone. The Android Settings screen is displayed.
# Touch the application icon from the action bar and then touch Settings.
The Android Settings screen is displayed.
2.Touch About Tablet on the Android Settings screen.
3.Touch Status to view the accurate percentage of the remaining battery power. You also can touch Battery use to check what applications are consuming battery power.
KeyBoard DisassemblingHeat the 5mm adhesive surface to 60‐70°C all the way around for about ten minutes.
Place suction cups in the position shown in the photo and slowly lift up the secondary display TP. Once there is a gap, insert the piece for disassembly to 5mm. Do this on all four sides to open it up, and then lift up the secondary display.
Remove the black Mylar. Use tweezers to disconnect the KeyBoard assembly and the main board connected to the FPC interface. Gently pull the FPC, so the main board and the KeyBoard assembly are completely separated.
Note:
1. The power key’s FPC can be easily broken in disassembly.
2. When open, the right side of the motor and the EMR are bonded together. Be careful not to break the motor’s lead wire.
3. The KeyBoard assembly’s FPC connector is located on the top left side. Remember that slow disassembly is required so as not to damage the FPC.
How to replace the Battery
Use a screwdriver to remove the black screws from the battery’s silver sheeting, then remove the sheeting.
Use tweezers to open the interface between the battery FPC and the main board.
Use a blade to pry open the black cover on either side of the battery, and remove the covers.
After the covers are completely separated, you will see four pieces of blue adhesive. Pull out the four pieces of adhesive, and gently remove the battery.
Posted By: FRANK at 04:26
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