How to troubleshoot Samsung PN43E450A1FXZA Plasma TV

Applicable to Samsung Plasma TVs: 

PL51E450A1FXZP / PN43E440A2FXZA / PN43E450A1FXZA / PN43E450A1FXZC / PN51E440A2FXZA / PN51E450A1FXZA /PN51E450A1FXZC - Version: 1011.1

SMPS PCB – BN44-005098

Power Supply Trouble Shooting

2010/2011/2012 models will not be run when the “X“ or “Y” or “Y/X” Main are disconnected.  The SMPS will shut down immediately. How ever if a meter is first connected to the test point when power is applied it will read the correct voltage briefly before shutting down.(You have enough time to check key voltages)

Do not reconnect any connectors to SMPS board or Y/X bard[s] until power has been turned off long enough for Vs to drop below 10V or damage will occur to X/Y board[s]

VITAL SIGNS check Vs, Va, Vsc & Ve

When troubleshooting, It’s very important to first check Vs, Va, Vsc & Ve

If Vs is missing (0V), disconnect power and check for short. Use ohm meter to measure resistance while disconnecting Y/X‐Board supply feed.

Turn Power On and Test SMPS with short connector removed for correct Vs voltage verification. (It may only come up briefly but to full level). Again be careful not to reconnect Power Connectors until Vs falls below 10V.

If Va is low or missing, disconnect Supply Feed to Logic Buffer Boards and check to see if SMPS Supply is restored.

If Vsc is low or missing and Vs was OK, the failure is with the Y/X‐ Board since the Y‐Board section generates the Vsc voltage from the Vs supplied by the SMPS.

If Ve is low or missing and Vs is OK, the failure is with the Y/X‐Board since the Ve is generated by the X‐Board section from the Vs supplied by the SMPS.

Other SMPS Voltages:
Check Low Voltage feeds to the Main Board and other supplied Assemblies.

Over Current Protection

For the SMPS Power Supply... If a short circuit occurs on either the VS or VA voltage lines, the SMPS stops operating, but should not fail.  When the short circuit is removed from the source line, the power supply will operate normally again.  Many SMPS supplies are replaced needlessly.

Activating power and logic board test patterns without main board

E450 Power On Sequence

E450 Supply Adjustments

Function control troubleshooting

TROUBLESHOOTING VIDEO PROBLEMS

Verify Video Operation:

A. Customer Picture Test
B. “Display”

C. If display & Customer Picture Test are OK source is suspected.

D. Substitute with known good source and cabling.

Using Test Patterns in Service Mode:

Customer Remote
A. Power off
B. Mute, 182, Power.

Factory Remote:
A. Power On
B Info Test.

3. Verify M‐STAR Patterns
4. Verify Logic Patterns.

If Logic Patterns are OK and M‐ Star are noisy, replace the defective LVDS Cable or Main Board.

If M‐Star and Logic Patterns are and logic patterns are both noisy check for specification screen noise error to determine failure.

ON SCREEN FAILURE EXAMPLES:  NOTE: X/Y MAIN Combined.

ALIGNMENTS:

Check/Adj. VS, VA, VE, & VSC according to Panel Label and Diffusion test. (see bulletins for any special notes before making changes)

DIFFUSION TEST/ADJ. (cell miss‐firing)
‐ Allow the unit to warm up 15 to 20 minutes
‐ Access the Burn Protect Sig. Pattern in Cust. Menu.
‐Adj t ust the Vs volts until screen errors are gone in both dark and bright areas.
‐Adjust the Vs volts within +/‐ 10V on the panel label.

[Diffusion may appear with aging panels.  New panels with Diffusion consult bulletins and/or report problem]

Check/Set Option Bytes:
PN43E450A1FXZA Table Listed below

PWBs and part numbers

Lenovo E50–80 – Core i7 - How to test the AC adapter – How to test the battery pack – How to replace the keyboard

Lenovo E50–80:  Restore of factory default
The Lenovo E4030/E4070 computers come with pre-installed OneKey Recovery System. In order to save application files and the initial backed up files of the system, the hard disk in a Lenovo computer includes a hidden partition when it is shipped. If you need to restore the system to the point of your first boot up, just enter Lenovo OneKey Recovery System and run System Recovery

Power system checkout
To verify if a battery pack or an ac power adapter is functional, do the following:
1. Turn off the computer.
2. Connect the ac power adapter.
3. Turn on the computer. If the computer can be turned on, it means that either the battery pack or the ac power adapter is functional.
4. Insert a straightened paper clip into the novo button to reset the computer. If the computer is still powered on, it means that the ac power adapter is functional.
5. Turn off the computer.
6. Disconnect the ac power adapter and turn on the computer. If the computer can be turned on, it means that the battery pack is functional.
If you suspect a power problem, see the appropriate one of the following power supply checkouts:
“Checking the ac power adapter”
“Checking the external battery pack and the operational charging”
Checking the ac power adapter
You are here because the computer fails only when the ac power adapter is used.
If the power problem occurs only when the docking station or the port replicator is used, replace the docking station or the port replicator.

If the power-on indicator does not turn on, check the power cord of the AC adapter for correct continuity and installation.
To check the ac power adapter, do the following:
1. Unplug the ac power adapter cable from the computer.
2. Measure the output voltage at the plug of the ac power adapter cable. See the following illustration

Note: Output voltage of pin 2 of the ac power adapter might differ from the one you are servicing.

3. If the voltage is not correct, replace the ac power adapter.
4. If the voltage is acceptable, replace the system board.
Note: Noise from the ac power adapter does not always indicate a defect.
Checking the external battery pack and the operational charging
Checking the external battery pack
To check for detailed battery status information, do the following:
For 7: Open the Power Manager program and click the Battery tab.
For 8 and 8.1: Open the Lenovo Settings program and click Power.
Note: If the external battery pack becomes hot, it may not be able to charge. Remove it from the computer and leave it at room temperature for a while. After it cools down, reinstall and recharge it.
Checking the operational charging
To check whether the battery pack charges properly during operation, do the following:
1. Discharge the battery pack until the remained battery power is less than 50%.
2. Connect the computer to ac power to charge the battery pack. If the battery status icon in the Windows notification area indicates that the battery pack is not charging, remove the battery pack and let it return to room temperature.
3. Reinstall the battery pack. If the battery pack is still not charging, replace the battery pack.
4. Check the battery status icon again. If the same error still exists, replace the system board.

How to remove Keyboard

Remove two screws

Remove three screws

Lift the keyboard a little by its upper edge with a flat blade 2, and then slide the keyboard frame

Lift the keyboard a little 4, and then detach the connector. in

Samsung Galaxy Mega – Disassembling procedure – How to remove the case – How to replace the display

Samsung Galaxy Mega

Once the rear cover is removed, you will have access to the screws, the SD card bay and the SIM card bay.

First, remove the battery to turn off the phone. Proceed to remove all PH000 screws from the exposed area as shown.

Using your plastic prying tool, gently pry the speaker upwards and remove it. The speaker is fragile, be careful not to break it.

Insert the pry tool along the side of the device. Pry gently until you hear clicks. Repeat along all sides of the phone. You will continue hearing a clicking sound as the frame begins to release. Gently pull the battery clip up.Then slightly twist the frame slightly clockwise as there is a little clip around the camera that needs released. Once the back frame has been removed, the motherboard and connectors will be exposed.

Remove the LCD cable using your pry tool. Next, remove the front camera by unscrewing the panel. Disconnect the front camera cable.

Get your heat gun out and heat around the edges all around the screen Using three guitar picks, insert them into the phone. Be careful not to insert them at the bottom because the back button and menu button break easily, so take your time.

With your guitar picks still in, lift the screen up towards you. Don't pull it off right away, leave the screen at an angle Put the screen down with guitar picks to keep it loose. Heat up the bottom to loosen the adhesive from the back and the menu button. Once that is done, carefully pull the screen towards you and keep an eye on the bottom to make sure the buttons are seperating from the adhesive

Verify the buttons separate from the adhesive, and now you can separate the screen from the bezel. Follow the steps in reverse to put the new screen down, don't forget the home button and top speaker silver piece.

HP HDX X16-1000 – Disassembling procedure – How to remove the Optical drive – How to replace the Keyboard – How to remove the battery

HP HDX X16-1000:  DISASSEMBLING PROCEDURE 

How to remove the Battery

Before disassembling the computer, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn the computer on, and then shut it down through the operating system.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power from the computer by first unplugging the power cord from the AC outlet and then unplugging the AC adapter from the computer.
Remove the battery:
1. Turn the computer upside down on a flat surface, with the front toward you.
2. Slide the battery release latch 1 to release the battery.
3. Pivot the battery 2 upward and remove it 3 from the computer.

How to remove the Optical drive

Before removing the optical drive, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn the computer on, and then shut it down through the operating system.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power from the computer by first unplugging the power cord from the AC outlet and then unplugging the AC adapter from the computer.
4. Remove the battery
Remove the optical drive:
1. Position the computer with the left side toward you.
2. Remove the Phillips PM2.5×7.0 screw 1 that secures the optical drive to the computer.
3. Insert an unbent paper clip or similar tool into the optical drive tab access 2 and push the tab forward to release the optical drive from the computer.
4. Remove the optical drive 3 from the computer.

How to remove the Hard drive

Before removing the hard drive, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn the computer on, and then shut it down through the operating system.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power from the computer by first unplugging the power cord from the AC outlet and then unplugging the AC adapter from the computer.
4. Remove the battery
Remove the hard drive:
1. Loosen the four Phillips PM2.5×6.0 captive screws 1 that secure the hard drive cover to the computer.
2. Lift the rear edge of the hard drive cover 2, swing it up and forward, and then remove the cover 3. The hard drive cover is included in the Plastics Kit, spare part number 496477-001.

3. Disconnect the hard drive cable 1 from the system board.

4. Grasp the Mylar tabs 2 on the hard drive and slide the hard drive 3 to the left.
5. Remove the hard drive from the hard drive bay 4.

How to remove the RTC battery

Before removing the RTC battery, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn the computer on, and then shut it down through the operating system.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power from the computer by first unplugging the power cord from the AC outlet and then unplugging the AC adapter from the computer.
4. Remove the battery
5. Remove the hard drive cover
Remove the RTC battery:
Lift the RTC battery from the socket.

How to remove the Keyboard

Before removing the keyboard, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn the computer on, and then shut it down through the operating system.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power from the computer by first unplugging the power cord from the AC outlet and then unplugging the AC adapter from the computer.
4. Remove the battery
5. Remove the switch cover
6. Remove the keyboard cover

Remove the keyboard:
1. Turn the computer upside down, with the front toward you.
2. Remove the two Phillips PM2.5×7.0 screws that secure the keyboard to the computer.

3. Turn the computer display-side up, with the front toward you.

4. Open the computer as far as possible.
5. Remove the Phillips PM2.0×4.0 screw that secures the keyboard to the computer.

6. Lift the rear edge of the keyboard 1 until it rests at an angle.

7. Release the keyboard 2 by sliding it back to disengage the tabs on the front edge of the keyboard from the top cover and rest it on the display.

8. Release the zero insertion force (ZIF) connector 1 to which the keyboard cable is attached and disconnect the keyboard cable 2 from the system board.

Panasonic PT – DZ770U – How to replace the lamp – Air filter cleaning – Led blinking and cusses

Panasonic PT – DZ770U – How to replace the lamp – Air filter cleaning – Led blinking and cusses – How to initialize – Service mode – Projector repair and service

Panasonic PT – DZ770U: Replacement procedure for lamp unit
1. Power off the projector and disconnect the power plug from the power outlet.
And wait at least one hour, and then check if the lamp unit has been cooled down.
2. Loosen the lamp unit cover fixing screw (one screw) until it turns freely, and then open the lamp unit cover in the direction of the arrow.

3. Loosen the lamp unit fixing screw (three screws each) until it turns freely, and then holding the handles, pull out the lamp unit from the projector.

4. Install the Lamp units and install the lamp unit cover. Perform the disconect step in the reverse order.

Projector does not turn on by protection circuit, if Lamp unit or Lamp unit cover are installed inperfect. When you replace yje new lamp unit, the projector resets the total usage time of the lamp unit automatically.

Air filter maintenance
1. The air filter is clogged with dust, causing the filter replacement message to appear on the screen and the filter indicator <FILTER> to light in red. In such a case, clean the air filter unit.
2. The proceeds of the air filter clogging, becomes hot of projector inside, and <TEMP>indicator is lit , power shut down. Then <FILTER>Indicator remains red , <TEMP> indicator will blink (2 times) red.
3. Indication of cleaning is 12,000 hours. but varies greatly depending on the usage environment. If dirt does not come off even if the unit is maintained, it is time for the unit to be replaced.

Cleaning procedure for air filter unit
1. Power off the projector and disconnect the power plug from the power outlet.
And wait at least one hour, and then check if the lamp unit has been cooled down.
2. Loosen the lamp unit cover fixing screw (one screw) until it turns freely, and then remove the Air filter cover.

3. Hold the tabks on the air filter unit and pull out the air filter unit from the projctor.

4. Clean and dry the air filter unit.

1) Soak the air filter unit in cold or warm water and then lightly rinse it.

 Do not use cleaning tools such as brushes.
When rinsing, fold the frame of the air filter unit without putting strong
pressure on the filter unit.
2) Rinse the unit two to three times using fresh water each times.
3) Let the unit naturally dry off in a well-ventilated place where there is little
dust and the unit is protected from direct sunlight.
After clearing the air filter unit, make sure that it is sufficiently dry before reinstalling it to the projector.
Do not dry using drying devices such as dryers. (Please read the page 'Maintenance / Replacement' on the instruction book to know about diatils.)

Initialization for menu lock password

Follow the procedure below to initialize the password to the default "AAAA".
1. While menu lock password is shown on the screen, press ‘AUTO SETUP’ button on remote controller or operation panel for more than 2 seconds.
2. Press Down  button for more than 2 seconds.

LED BLINIKING AND CAUSE

Monitor LED indication	Shutdown detection	Possible factor
STANDBY/ON LED blinks in red 4 times	Inter lock SW Open the rear cover more than 1 seconds.	Rear cover is not installed.
STANDBY/ON LED blinks in red 3 times	FPGA initialized or Communication error or Formatter initial error	DMD drive circuit is faulty or Signal processing unit PCB is faulty or Connector connection is faulty
	Color wheel rotation speed Over 202Hz or Under 70Hz	Rotation problem with color wheel
STANDBY/ON LED: Red TEMP LED: Lights	Optical block temperature sensor Under -20 degree C	Connection problem with optical block temperature sensor Faulty temperature sensor
	Exhausting temperature sensor Under -20 degree C	Connection problem with exhausting temperature sensor Faulty temperature sensor
TEMP LED Blinks 3 times	Each FAN sense signal Slower than 50% of target for more than 5 sec.	Fan rotation problem
	Cooling liquid pump speed Slower than 1000rpm more than 5 sec	Cooling liquid unit pump has problem
TEMP LED Blinks 2 times (Warning: TEMP LED lights)	Intake air temperature sensor More than 48 degree C 　　（High altitude mode: more than 43 degree C）	Intake air temperature problem Filter clogging High temperature of environment Intake air window is closed.
	Optical module temperature sensor 　More than ** degrees C	Optical module error. Cooling liquid unit attachment error Clogged ventilator High altitude mode is not on
	Optical module temperature sensor After lamp lighting, less than 5 degrees C for more than 5 minutes.	Optical module temperature is low. Adjust the setting circumstances.
	Exhaust temperature sensor More than ** degrees C	Exhaust temperature error. Closed ventilator Deteriorating exhaust fan High altitude mode is not on
LAMP LED blinks 3 times	Lamp status Lamp is off during the status other than normal one	Failed making lamp ON, lamp abnormal condition Ballast block faulty Hot restart

Service Mode

This model has Service Mode in addition to regular on screen menu (user mode).
This mode enables some menu settings for the service operation.
Setting to Service Mode
2. Input "1565" by remote controller and press ENTER. Then it goes into the Service Mode.
3. Press MENU button on the main body or remote controller and the menu of Service Mode is displayed.
Resetting to User Mode
2. Input "0000" by remote controller and press ENTER. Then the Serviceman Mode is disabled.
3. Press MENU button on the main body or remote controller and the menu of User Mode is displayed
1. Press menu button of main body or remote controller and go to Main menu -> "Projector setup".
Then go to sub menu and select "Service Password" and press ENTER.
1. Press menu button of main body or remote controller and go to Main menu -> "Projector setup".
Then go to sub menu and select "Service Password" and press ENTER

ARRI ALEXA – Digital movie camera – How to update the firmware

ARRI ALEXA – Digital movie camera – How to update the firmware - Power management – Battery types – battery installation – Battery voltage specifications

ARRI ALEXA:  Power Management

When using the BAT connector and one or more onboard battery adapters simultaneously, the camera’s power management system ensures that the power source with the highest voltage level is used. When the voltage level of one power source drops below the level of the other, or a power source is disconnected from the camera, the power management system automatically switches to the other power source, avoiding shutdown of the camera.
For example, a 12 V onboard battery can be used as backup for the main 24 V battery. Using a 12 V onboard battery in addition to the main 24 V battery also allows for quick switchover to handheld mode - the power cable can simply be disconnected from the BAT connector.
When using two onboard battery adapters (with batteries in parallel - one on top and one on the back), the camera will treat them as a single source. When used this way, the load is spread across two batteries, creating a strong power source.

BAT Connector
The BAT connector is the primary power input on the ALEXA. It is a Fischer 2-pin socket located at the back of the camera on the cameraright side.

The socket accepts power cables KC-20S and KC-29S. The cables can either be connected to the mains unit NG 12/26R or to 24 V cine-style batteries with three-pin XLR outputs.

Mains Unit NG 12/26 R

Use of the mains unit is recommended for shooting in the studio and when using electronic accessories with high power consumption.
To power the ALEXA using the Mains Unit NG 12/26 R:
1. Set the correct mains voltage on the mains unit using the fuse on the back of the unit. For example, set it to 220 V if the AC mains power source is 220 V.
2. Connect the mains unit to AC mains power.
3. Ensure that the camera power is turned off.
4. Set the voltage switch on the mains unit to 26 V.
5. Connect the battery cable KC-20S or KC-29S (spiral cable) to the power supply socket on the camera and the 26 V socket on the mains unit.

Cine-Style Batteries
Any 24 V cine-style battery with a three-pin XLR output can be used to power the camera through a KC-20S or a KC-29S battery cable.
To connect the battery to the camera:
1. Ensure that the main switch on the camera is off.

2. Connect the battery cable KC-20S or KC-29S (spiral cable) to the power supply socket on the camera and the 28V output on the battery.

Onboard Batteries
The camera can be equipped with adapters for either V-Lock or Gold
Mount video-style batteries. When a battery equipped with the TIprotocol for battery communication is used, the ALEXA will display remaining capacity as a percentage on the Home screen. For these batteries, the user does not need to set the battery warning level.
Four different adapters are available:
BAB-G: Battery Adapter Back for Gold Mount batteries
BAB-V: Battery Adapter Back for V-Lock batteries
BAT-G: Battery Adapter Top for Gold Mount batteries
BAT-V: Battery Adapter Top for V-Lock batteries

V-Lock Batteries
V-Lock batteries from different manufacturers may be used on the ALEXA. When batteries from manufacturers such as ID-X and Bebop, are used, their remaining capacity will be displayed as a percentage on the Home screen.
To attach a V-Lock battery:
1. Align the v-shaped wedge on the battery with the v-shaped notch on the battery plate.
2. Press the battery downwards until you hear a click.
3. Check that the battery is securely mounted on the battery plate.
To release a V-Lock battery:
1. Press the release button on the camera-left side or top of the battery (manufacturer dependent)

2. While pressing the release button, slide the battery upwards.

ALEXA with BAB-V and V-Mount battery

Gold Mount Batteries

If the ALEXA is equipped with a Gold Mount, Anton/Bauer batteries can be used. Their remaining capacity will be displayed as a percentage on the Home screen.
To attach a Gold Mount battery:
1. Align the three pins on the back of the battery to the three corresponding holes on the battery plate.
2. Press the battery to camera-right until you hear a click.
3. Check that the battery is securely mounted on the battery plate.
To release a Gold Mount battery:
1. Press the release button on the camera-left side of the battery plate.

2. While pressing the release button, slide the battery camera-left, and
pull it straight out.

ALEXA with BAB-G and a Gold Mount battery

Power Outputs

The ALEXA, ALEXA M, ALEXA XT, ALEXA HD and ALEXA XT M have two 24 V power outputs and one 12 V power output for accessories. ALEXA Plus, ALEXA Plus 4:3, ALEXA HD Plus, ALEXA XT Plus, ALEXA Studio and ALEXA XT Studio models have three 24 V power outputs and one 12V power output.

Powering 12 V Accessories

One 12 V output with a 2-pin LEMO connector is located on the right side of the camera. It is limited to 12 V and can supply a device with a current of up to 2.2 A, depending on the camera power supply.
Powering 24 V Accessories
Two 24 V remote start/stop (RS) outputs with 3-pin Fischer connectors are located on the right side of the camera. They can supply two devices with a combined load of up to 2.2 A (shared with the EXT connector power out), depending on the camera power supply. When the camera is powered from a source with a voltage below 24 V, they output 24 V. If the camera's power source supplies more than 24 V, this voltage level is also present on the RS outputs. Besides powering accessories, the RS outputs can also be used to send a remote start/stop signal to the camera.

Firmware - Software Update Packets (SUPs)

To update the camera to a new SUP:
1. Copy the new SUP into the Firmware folder on an SD card formatted in the ALEXA.
2. Load the SD card into the camera.
3. In the System menu, select Firmware.
4. Select Select update file.
5. Select the new SUP from the list on the FIRMWARE (SD CARD) screen.
6. Press both UPDATE buttons simultaneously to update the camera's firmware

Note: Update duration may differ between camera models. Do not interrupt the update once it has started. Make sure the camera power supply will remain sufficient for the duration of the update (approx. 15 minutes).

Select update file:  Select to update the camera’s firmware. If an SD card containing update files is loaded in the camera, you can select an update file from the list and perform an update.

Current version: Select to display the release code of current installed firmware.

Licensed features: Select to manage licensed features on the INSTALLED LICENSES screen.

To save the hardware info file:
1. In the System menu, select Firmware.
2. Select Licensed features.

3. On the INSTALLED LICENSES screen, press the HW INFO button.
4. Press the SAVE button. The hardware info file will be saved on the SD card in the root directory. It will look like sn####-AlexaHardware.ipkg. The INSTALLED LICENSES screen displays a list of installed licenses.
New license can be installed from the SD card.
To install new licenses after purchase:
1. Copy the license key - it will have the suffix .lic - into the Licenses folder on an SD card formatted on the ALEXA. Load the SD card into the camera.
2. In the System menu, select Firmware.
3. Select Licensed features.
4. Press the INSTALL button.
5. On the LICENSE FILES (SD CARD) screen, select the license to be installed. The licensed feature enabled by the license key is described at the bottom of the screen for each license selected.
6. Press the jog.

How to replace the home button- Apple iPhone 6

Power off your iPhone before beginning disassembly. Remove the two 3.6 mm Pentalobe screws next to the Lightning connector.

The next three steps demonstrate using the iSclack, a great tool for safely opening the iPhone 6 that we recommend for anyone doing more than one repair. If the plastic depth gauge is attached at the center of the iSclack, remove it now - it's not needed for larger phones like the iPhone 6. Close the handle on the iSclack, opening the suction-cup jaws.

Place the bottom of your iPhone in between the suction cups. Position the iSclack's upper suction cup against the display, just above (but not covering) the home button.

Open the handles to close the jaws of the iSclack. Center the suction cups and press them firmly onto the top and bottom of the iPhone.

Hold onto your iPhone securely and close the handle of the iSclack to separate the suction cups, pulling the front panel up from the rear case. The iSclack is designed to safely open your iPhone just enough to separate the pieces, but not enough to damage the display cables. Peel the two suction cups off your iPhone.

If you don't have an iSclack, use a single suction cup to lift the front panel: Press a suction cup onto the screen, just above the home button.

Be sure the cup is pressed securely onto the screen to get a tight seal.

While holding the iPhone down with one hand, pull up on the suction cup to slightly separate the front panel assembly from the rear case. Take your time and apply firm, constant force. The display assembly is a much tighter fit than most devices.

Using a plastic opening tool, begin to gently pry the rear case down, away from the display assembly, while continuing to pull up with the suction cup. There are several clips holding the front panel assembly to the rear case, so you may need to use a combination of the suction cup and plastic opening tool to free the front panel assembly.

Pull the plastic nub to release the vacuum seal on the suction cup. Remove the suction cup from the display assembly.

Pull the home button end of the front panel assembly away from the rear case, using the top of the phone as a hinge.

Keep the front panel supported at a 90 Degree angle in relation to the rear case until you remove It allowing it to fall flat will strain the display cables and their connections on the logic board.

Several clips along the top edge of the front panel form a partial hinge, allowing the front panel assembly to swing open like a book. During reassembly, align the clips just below the top edge of the rear case. Then, slide the front panel upward until its top edge is flush with that of the rear case.

Remove the following five Phillips screws securing the front panel assembly cable bracket:

Three 1.2 mm screws
One 1.7 mm screw
One 3.1 mm screw

Remove the front panel assembly cable bracket from the logic board.

In the next four steps, take care to pry up only on the cable connectors, and not on their sockets on the logic board.

Use the flat end of a spudger to disconnect the front-facing camera and sensor cable connector.

Use the flat end of a spudger to disconnect the home button cable connector.

Use the flat end of a spudger to disconnect the display data cable connector. When reassembling your phone, the display data cable may pop off its connector. This can result in white lines or a blank screen when powering your phone back on. If that happens, simply reconnect the cable and power cycle your phone. The best way to power cycle your phone is to disconnect and reconnect the battery connector.

Use the flat end of a spudger to disconnect the digitizer cable connector.

 Remove the front panel assembly from the rear case.

 Remove the two 1.9 mm Phillips #00 screws securing the home button bracket.

 Remove the home button bracket from the front panel.

 Use the point of a spudger to disconnect the home button cable connector by pushing it up and away from the home button.

 Gently push the top left corner of the home button up away from the front panel. Do not push the home button all the way through—you only need to get a corner free so that you can pry it free with a spudger.

This membrane is very thin. If you feel like you're going to tear the button, apply mild heat and try again.

 Peel the home button the rest of the way off of the display by prying gently with a spudger.

 Use the point of a spudger to carefully separate the home button cable from the adhesive securing it to the front panel.

 Once all the adhesive has been separated, remove the home button from the front panel.

Depending on your replacement part, you may need to remove the rubber gasket around your home button. Use a set of tweezers to carefully pull the gasket up from the home button.

Be careful not to snag the gasket on the home button cable.

Lenovo G400s – How to test the battery pack – how to test the AC adapter – How to remove the battery

Lenovo G400s - G405s - G400s Touch - G500s - G505s - G500s Touch – How to test the battery pack – how to test the AC adapter – How to remove the battery

Lenovo G400s - G405s - G400s Touch - G500s - G505s - G500s Touch

To verify a symptom, follow the steps below:
1. Turn off the computer.
2. Remove the battery pack.
3. Connect the AC adapter.
4. Make sure that power is supplied when you turn on the computer.
5. Turn off the computer.
6. Disconnect the AC adapter and install the charged battery pack.
7. Make sure that the battery pack supplies power when you turn on the computer.
If you suspect a power problem, see the appropriate one of the following power
supply checkouts:
“Checking the AC adapter”
“Checking operational charging”
“Checking the battery pack”
Checking the AC adapter
You are here because the computer fails only when the AC adapter is used.
If the power-on indicator does not turn on, check the power cord of the AC adapter for correct continuity and installation.
To check the AC adapter, follow the steps below:
1. Unplug the AC adapter cable from the computer.
2. Measure the output voltage at the plug of the AC adapter cable. See the following figure:

Note: Output voltage for the AC adapter pin No. 2 may differ from the one you are servicing.

3. If the voltage is not correct, replace the AC adapter.
4. If the voltage is acceptable, do the following:
Replace the system board.
Note: Noise from the AC adapter does not always indicate a defect.
Checking operational charging
To check whether the battery charges properly during operation, use a discharged battery pack or a battery pack that has less than 50% of the total power remaining when installed in the computer.

Perform operational charging. If the battery status indicator or icon does not light on, remove the battery pack and let it return to room temperature. Reinstall the battery pack. If the charge indicator or icon is still off, replace the battery pack.
If the charge indicator still does not light on, replace the system board. Then reinstall the battery pack. If it is still not charged, go to the next section.
Checking the battery pack
Battery charging does not start until the Power Meter shows that less than 95% of the total power remains; under this condition the battery pack can charge to 100% of its capacity. This protects the battery pack from being overcharged or from having a shortened life.
To check your battery, move your cursor to the Power Meter icon in the icon tray of the Windows taskbar and wait for a moment (but do not click it), and the percentage of battery power remaining is displayed. To get detailed information about the battery, double-click the Power Meter icon.
Note: If the battery pack becomes hot, it may not be able to be charged. Remove it from the computer and leave it at room temperature for a while. After it cools down, reinstall and recharge it.
To check the battery pack, follow the steps below:
1. Turn off the computer.
2. Remove the battery pack and measure the voltage between battery terminals
1 (+) and 7 (-). See the following figure:

3. If the voltage is less than +11.0 V DC, the battery pack has been discharged.

Note: Recharging will be continued for at least 3 hours, even though the
indicator does not light on.
If the voltage is still less than +11.0 V DC after recharging, replace the battery.
4. If the voltage is more than +11.0 V DC, measure the resistance between
battery terminals 5 and 7. The resistance must be 4 to 30 KΩ.
If the resistance is not correct, replace the battery pack. If the resistance is correct, replace the system board.

Battery pack

Unlock the manual latch 1. Slide the spring-loaded latch to the unlocked position 2 to eject the battery pack. Lift up the inner edge 3 of the battery pack, pivoting it on the outer edge. Slide the battery pack in the indicated direction 4 to remove it.

HTC Thunderbolt – Disassembling procedure – How to remove the case – How to replace the mother board

Insert the plastic opening tool into the top of the Thunderbolt near the power button. Gently pry up on the rear panel around the edges until it is loose.

Lift and remove the rear panel.

Using the plastic opening tool, lift up the battery from the bottom near the kickstand. Remove the battery from the inner frame.

Use your finger to push the MicroSD card in towards the top of the phone, allowing it to be released from the casing.

Use tweezers to grab onto the MicroSD card and carefully remove it from the casing. Remove the six Phillips screws from the perimeter of the rear frame. By removing the screw with the "void" sticker on it, your Thunderbolt will no longer be covered under warranty.

Insert the plastic opening tool into the bottom of the phone underneath the soft keys. Gently pry up on the plastic cover by sliding the plastic opening tool across the bottom of the phone. Remove the plastic cover. The plastic cover will have adhesive on it making it difficult to remove.

Remove the two Phillips screws where the plastic cover was.

Insert the plastic opening tool in between the screen and the frame on the side of the phone. Slowly slide the the plastic opening tool along the side of the phone until the screen begins to separate from the frame. Do the same for the opposite side of the phone.

Carefully separate the screen and phone from the rear frame, starting from the bottom. Gently pull down on the phone and screen to fully separate it from the rear frame.

Using the tip of an plastic opening tool flip up the tab holding the capacitive button ribbon cable. Be careful opening these tabs as they are very easy to break. Use a pair of tweezers to pull the capacitive button cable out of its socket.

Lifting from the side where the ribbon was disconnected, flip over the motherboard. Remove the black tape covering the tabs connecting the motherboard and LCD.

Using the plastic opening tool pop up the two tabs connecting the LCD and motherboard.

Once the tabs have been popped up, slowly pull the two pieces away from each other. If there is resistance pulling apart the phone then a ribbon or tab has not been disconnected properly/completely.

The motherboard should now be completely disconnected

Sony VPL-VW50 – How to access Service mode – White balance adjustment – Power supply circuit diagram

Sony VPL-VW50  Service Mode Setting
1. Set the “Screen” of "Preferences” to “On” in the MENU.
2. MENU is erased.
3. Press the keys in the following order:
“ENTER” > “ENTER” > “LEFT”  > “ENTER”
4. The message “Do you wish to enter into the SERVICE MODE? Yes No” will be displayed.
5. Select “Yes”.
Note
When leaving the FACTORY MODE,
“Do you wish to return to the USER MODE? Yes No” will be displayed. Select “Yes”.
Note that when the items (W/B, Device Adjust) that can be adjusted in the Factory mode are adjusted and stored in memory, they are saved in NVM and the factory
default data will be lost. Be sure to perform "Save to memory" after entering and exiting the Gamma adjustment mode. If the values are changed in the Gamma adjustment mode and the original values cannot be restored, turn off the power to the unit and turn it on again. The UF data does not change even if the mode for Advanced Iris in Cinema Black Pro in Picture Adjust is changed without performing "Save to memory". When "Save to memory" is performed at that time, the UF data of each Iris mode will be overwritten and lost.

White Balance Adjustment on Servicing
Component
Preparation
Set Picture Mode to “Standard” and make the following
settings.
Contrast: 80
Bright: 50
Color: 50
Hue: 50
Sharpness: 50
NR: OFF
Black Level Adjust: OFF
Gamma Correction: OFF
Advanced Iris: OFF
Set each GAIN and each BIAS for RGB to 128.
Bring the ZOOM position of the lens to the center.

Adjustment High
Set Color Temp to “High”.
Input 1080/60i 20 IRE flat field (RGB 3 color) into the component terminal and adjust R for white balance and BIAS for G until the chromaticity (x20, y20) is at the standard value.
(x20, y20) = (0.284 ±0.002, 0.298 ±0.002)
Input 1080/60i 80 IRE flat field (RGB 3 color) into the component terminal and adjust B for white balance and GAIN for G until the chromaticity (x80, y80) is at the standard value.
(x80, y80) = (0.284 ±0.002, 0.298 ±0.002)
Continue adjusting 80 IRE and 20 IRE until they reach standard values.
If the BIAS value for B falls below 90, redo the adjustments using G and B. Save the adjusted values.

Middle
Set Color Temp to “Middle”.
Input 1080/60i 20 IRE flat field (RGB 3 color) into the component terminal and adjust R for white balance and BIAS for G until the chromaticity (x20, y20) is at the standard value.
(x20, y20) = (0.294 ±0.002, 0.310 ±0.002)
Input 1080/60i 80 IRE flat field (RGB 3 color) into the component terminal and adjust B for white balance and GAIN for G until the chromaticity (x80, y80) is at the standard value.
(x80, y80) = (0.294 ±0.002, 0.310 ±0.002) Continue adjusting 80 IRE and 20 IRE until they reach standard values.
If the BIAS value for B falls below 90, redo the adjustments using G and B.
Save the adjusted values
Low
Set Color Temp to “Low”.
Input 1080/60i 20 IRE flat field (RGB 3 color) into the component terminal and adjust B for white balance and BIAS for G until the chromaticity (x20, y20) is at the standard value.
(x20, y20) = (0.313 ±0.002, 0.329 ±0.002)
Input 1080/60i 80 IRE flat field (RGB 3 color) into the component terminal and adjust B for white balance and GAIN for G until the chromaticity (x80, y80) is at the standard value.
(x80, y80) = (0.313 ±0.002, 0.329 ±0.002)
Continue adjusting 80 IRE and 20 IRE until they reach standard values.
If the BIAS value for B falls below 90, redo the adjustments using G and R. Save the adjusted values.

CUSTOM
Set Gain and Bias for CUSTOM 1 to 3 to the following values.
CUSTOM 1: Copy the Gain and Bias values for HIGH and make the Gain values for R/G/B ±20.
CUSTOM 2: Copy the Gain and Bias values for MIDDLE and make the Gain values for R/G/B ±0.
CUSTOM 3: Copy the Gain and Bias values for LOW and make the Gain values for R/G/B ±0.
Save the set values
Switch the Advanced Iris between “AUTO1” and “MANUAL”, and adjust each setting.
However, for the “AUTO” adjustment, if the Bias value for B falls below 82, redo the adjustment using G and R. There are 3 types of adjustment data for color temperature and 3 types for Advanced Iris, for a total of 9 types.
Computer
Set Input-A to “Computer”.
Input WXGA 80 IRE flat field (RGB 3 color) into Input-A. Copy the adjustment value from “Component” to each GAIN and each BIAS for RGB.
Save the set values.

HTC HD2 – How to disassemble – How to remove the case – How to remove the battery – How to replace the motherboard

Carefully pull the rear cover from the back of the phone.
Place a finger beneath the small lip on the left side of the battery.

Lay the phone down on it's screen.

Lift up on the lip and pull the battery from the phone.

Remove the four black 3.5mm T5 screws from the back of the phone.

Insert the flat end of a spudger between the frame and the display.

Slide the spudger along the seam between the frame and the display.
Using the spudger for leverage, carefully pry the frame away from the display assembly.
This process will take some effort. Continue to pry slowly and carefully until the frame begins to detach.
As it releases, pull the frame away from the phone.
The volume control tab may fall off during removal. Do not worry when it does, it can be easily reattached.

Set the phone down on its screen.

Using tweezers, unplug the small vibrator connector from its socket on the motherboard.

Pull the vibrator motor from the phone.

Disconnect the small speaker cable from its socket on the motherboard.

Remove the earpiece speaker from the phone.

Remove the five screws shown with a T5 Torx screwdriver.

Locate the flash cable in the bottom area of the phone.

Unplug the cable and pull it from the device until you reach the actual camera.

Warning: Many of the upcoming steps are difficult and may cause permanent damage to your phone.

Pull the camera flash and cover off of the board. You may need to pull the sticker that is normally behind the battery back a little.

Now locate the coaxial bluetooth cable that connects the top and bottom boards of the phone.

Use tweezers to pop both ends of the cable from the boards and remove it completely.

Now find the AP FPC, one of the smallest connectors on the bottom board.

Pop the small black tab up using tweezers, then unplug the cable.

This step is pretty much irreversible, so do not do this unless you absolutely have to.

Remember peeling back part of that big sticker in the middle? Now you get to take it all the way off.
This may take some time, and the use of the tweezers, but keep at it until the whole sticker is off.

Now find the GPS board in the upper left hand corner of the phone.

Find and pull out the white cable that connects it to the main board.
Note: The cable does not need to be unplugged from the main bottom board.
This (white) cable is connected to the underside of the bottom board, so if it gets detached, be sure to reattach before you reassemble the whole phone.

If this step does not progress easily, check to see that there are no screws still holding the board in place.

With the cable removed, pop the GPS board out of the phone using tweezers.

Using a spudger, begin to pry the copper colored board in the middle away from the phone to loosen it.

Also pry the small piece that runs under where the volume selector is on the full phone.

Caution: there is a connecter cable under the main board, so do not pull it all the way off right away.

Gently pop both the top and bottom boards off of the phone, and turn them over to the left

With the back of the main board exposed, flip up the little brown lever at the end of the connector and unplug the final cable that connects it to the main board.