MOBILE CELL PHONE CHARGER CIRCUIT SCHEMATIC DIAGRAM

 The main part of the circuit mobile cellphone charger is timer IC NE555, used to charge and monitor the voltage level. IC1 get control voltage to pin 5 by zener diode ZD1­. Threshold pin 6 and trigger pin 2 is supplied with a voltage set by VR1 and VR2 respectively. The trigger pin 2 of IC1 is below 1/3VCC when discharge battery is connected to the circuit as a result flip-flop of IC1 is switched on to take output pin 3 high. The process is reversed when battery is fully charged of charged battery is connected. Here transistor T1 used to enhance the charging current from output pin 3 of IC1. Adjust potentiometer VR1 and VR2 as per require.

LED status for different charging conditions

Load across the output	Output frequency (at pin 3)	LED1
No battery connected	765 kHz	On
Charging battery	4.5 Hz	Blink
Fully charged battery	0	Off

Circuit Diagram

Parts
Resistors (all ¼-watt, ± 5% Carbon)
R1 = 390 Ω
R2 = 680 Ω

R₃ = 39 Ω/1W

R₄ = 27 KΩ

R₅ = 47 KΩ

R₆ = 3.3 KΩ

R₇ = 100 Ω/1W

VR₁, VR₂ = 20 KΩ

Capacitors
C1 = 0.001 µF (ceramic disc)
C2 = 0.01 µF (ceramic disc)
C3 = 4.7 µF/25V (Electrolytic )

Semiconductors
IC1 = NE555 timer IC
T1 = SL100 or any Medium power general purpose NPN transistor like: 2N4922 , 2N4921,2N4238, FCX1053A
ZD1 = 5.6 V/1W
LED1
Miscellaneous 
SW1 = On/off switch
1.5V*8 AA cells
Mobile connector

Source- http://electronicsproject.org/mobile-cellphone-charger/

IPHONE USB CHARGER PINOUT DESCRIPTION

 Description : 4 resistors with this values: 2 of 50 kΩ, 1 of 100 kΩ and 1 of 150 kΩ.

SONY ERICSSON PLAYSTATION PHONE HARD RESET PROCEDURE

This is the procedure on how to factory reset the Sony Ericsson PlayStation Phone if you want to wipe and clear all data and you want to restore its original factory default settings again.

Just follow this simple step by step instructions on how to hard reset the Sony Ericsson PlayStation Phone

Please note: the result of this procedure  will be delete all data installed or stored from the Sony Ericsson PlayStation Phone. And also, the result of this process may or may not delete data stored on the microSD memory card. Please do have a back up copy all of your personal data before proceeding.

Factory Reset from the main home screen,

   1. From the Main Home Screen, select Menu
   2. Select Settings, then select Privacy
   3. Select Factory Data Reset
   4. Select Reset Phone
   5. Enter the Password if prompted, then confirm by selecting Erase Everything

If the Sony Ericsson PlayStation phone is frozen, do a hard reset through button combination.

   1. Turn Off the device power. If your Sony Ericsson PlayStation Phone is frozen, take the battery out from the device and reinsert it back again.
   2. Hold the Left and Right buttons located just beneath the LCD display
   3. Press and then  release the Power button
   4. Just follow the on-screen instructions on  how to hard reset your Sony Ericsson PlayStation Phone

Once the factory reset process  is complete, the phone will reboot to its factory fresh state.
All data including third-party applications installed and stored already deleted from the Sony Ericsson PlayStation Phone

SONY ERICSSON XPERIA X8 HARD RESET INSTRUCTION - WIPE AND RESTORE TO FACTORY SETTING

Here's, how to hard reset the Sony Ericsson Xperia X8 with simple step by step instructions.

Please note this process  will  delete all data from the Sony Ericsson Xperia X8 , but may or may not delete the data stored on the microSD memory card. Do have  a back up or a copy of all  your personal data before you may proceed.

Restore through the Main Home Screen Settings

   1. From the Main Home Screen, select Menu
   2. Select Settings, then select Privacy
   3. Select Factory Data Reset
   4.Then Reset Phone
   5. Enter the Password if prompted or required, then select Erase Everything.

If the phone is frozen: You can Hard Reset it trough key combination.

   1. Turn the power off first. If the Sony Ericsson Xperia X8 is frozen, take the battery out from the device and then reinsert it back again after a few seconds.
   2. Hold the Left and Right Keys located beneath the LCD Display
   3. Press and release the Power Key
   4. Just then follow the on-screen instructions that appears to hard reset the Sony EricssonXperia X8

Once the wipe process is complete, the phone will then reboot to its factory fresh default state settings.
All data including third-party applications already deleted from the Sony Ericsson Xperia X8.You may need to reinstall it back again.

SAMSUNG DROID CHARGE HARD RESET, WIPE AND RESTORE TO FACTORY SETTINGS

Step by step instructions on how to hard reset the Samsung DROID Charge.Also known as Samsung SCH-i520, Samsung Inspiration, Samsung 4G LTE, Samsung Stealth V
OS     Android OS, v2.2 (Froyo)
CPU     1 GHz ARM Cortex-A8 processor, Hummingbird chipset

Precautions: This process will delete or wipe all data from the Samsung DROID Charge. We advise to have a back up copy of all your important files stored on the device.

Factory Data Reset procedures:

   1. On the main home screen, tap menu
   2. Select Settings, then Privacy
   3. Select Factory data reset
   4. Select Reset phone
   5. Enter the password if prompted, then select Erase everything.

If your Samsung DROID Charge is frozen: Reboot or restart the phone.

   1. Turn the power off. , take the battery out and reinsert it back again
   2. Hold the Volume Down and Power Button
   3. A menu will then show up such as Fastbook, Recovery, Clear Storage, and Simlock
   4. Select Clear Storage by pressing the Volume Down button
   5. Press and release the Power button
   6. Select: Volume Up for YES and Volume Down for NO

Wait 'till the phone reboot, once the wipe process completes, the Samsung DROID Charge will return to its original factory fresh state default settings.
All data including third-party applications will be deleted from the Samsung DROID Charge.So you may need to re-install it back again.

HOW TO PROPERLY DISMANTLE MOBILE PHONES HANDSETS

Before Proceeding to dismantle any mobile Phone Handset make sure to ask your costumer about the warranty period of the said handset. Attempting to open it, may lose service warranty, just unless you are working in any authorized service center which is you are the one who decides.
Dismantling mobile handset needs extra care to avoid further damaged.
Scratches and breakage also takes place if unhanding carefully. On the internet you can easily find disassembly guide just type the following keywords example
"brand + model number + Disassembly guides" you may also find it in Youtube for video guides.
Even Professionals needs extra care how to dismantle mobile handset. Various brands have deffirent types of packaging types. Opening Tools also varies according what they suggest including torx screw number and other opening kits.
keep your time and don't rush in, always keep in mind that you are handling fragile object.
Wearing white cotton  hand gloves is a good advice for begineers and even Pros, to avoid risk of Electro Static Discharge
(ESD) There are components like CPU and Memory Chips which is can be easily damaged by Human Interference, a ground strap is also required as advice.
Make your working table free of dust and dirt's and other objects which is not part of disassembling tools, to keep a place where all part have to put when opening operation is done.
Here's an example dis-assembling of Nokia handset looks like.

Latest released of mobile Phone products doesn't have guides available like shown above. Pros and masters defends only their instincts to tear it down, with out any guides available.

iphone 3G
Tools Used in this Guide

*Dental Pick
*Metal Spudger
*Paper Clip
*Phillips #00 Screwdriver
*Spudger

Step 1 — Battery

*Remove the two Phillips #00 screws from the dock-connector end of the iPhone.
Step 2
*There is a rubber gasket between the silver front bezel and black display assembly. A bit of force is required in this step to separate the iPhone's display assembly.
*Use a small suction cup near the Home button to gently pull up the bottom portion of the iPhone's display assembly.

Step 3
*The display assembly is still connected to the iPhone by several cables, so don't try to remove it entirely just yet.
*Rotate the display assembly up until it is at an angle of approximately 45 degrees.

Step 4
*Continue to hold the display assembly with one hand, and use your other hand and a spudger to disconnect the black ribbon cable labeled "1."

Step 5
*Rotate the display assembly up until it is roughly vertical. This will allow easier access for disconnecting the remaining cables.
*Use a spudger to disconnect the black ribbon cable labeled "2."

Step 6
*Use a spudger to flip up the white plastic tab holding the remaining ribbon cable in place. The white tab will rotate up 90 degrees, releasing the ribbon cable.
* Slide the black ribbon cable out of its connector, and remove the display assembly from the iPhone.

Step 7
*Insert your SIM eject tool or a paper clip into the hole next to the headphone jack.
*Press down on the tool until the SIM card tray pops out.
*Grasp the SIM card tray and slide it out of the iPhone.

Step 8
*Use a spudger to disconnect the ribbon cable labeled "4."

Step 9
*Use a spudger to disconnect the ribbon cable labeled "5."

Step 10
*Use a spudger to disconnect the ribbon cable labeled "6."

Step 11
*Carefully peel up the small sticker labeled "Do not remove."

Step 12
*Remove the following 8 screws:
oFive 2.3 mm Phillips #00 screws with partial threads securing the logic board to the rear panel.
oTwo 2.3 mm Phillips #00 screws with full threads securing the logic board and camera.
oOne 2.9 mm Phillips #00 screw from beneath the "Do not remove" sticker.

Step 13
*Use a spudger to gently pry the camera up and out of its housing in the rear panel. The camera cannot be removed entirely yet because it's connected to the bottom of the logic board.

Step 14
*Use a spudger to gently pry up the end of the logic board closest to the dock connector.
*If the board won't lift up, double check to make sure all the screws securing the logic board have been removed.

Step 15
*Slide the logic board towards the dock connector and out of the iPhone.

Step 16
*Use a spudger to pry the battery up from the rear panel. The battery is attached with an adhesive strip around the perimeter of the battery. To prevent the battery from bending during the removal process, we recommend against using just the plastic pull-tab .

Step 17 — Headphone Jack
*Remove the two Phillips #00 screws securing the on/off switch to the front bezel.

Step 18
*Carefully peel up the orange ribbon cable from the rear panel.

Step 19
*Remove the following 4 screws:
oThree 1.8 mm Phillips #00 screws securing the headphone jack and GPS antenna to the rear panel.
oOne 3.8 mm Phillips #00 screw in the plastic loop near the headphone jack.
Step 20
*Remove the four Phillips #00 screws securing the volume and vibrate buttons.

Step 21
*Lift the volume button circuitry away from the side of the iPhone, and carefully peel up the orange ribbon cable from the rear panel

Step 22
*Carefully lift the headphone jack assembly out of the iPhone.

Step 23 — GPS Antenna
*Remove the single Phillips #00 screw securing the black plastic spacer.

Step 24
*Use a spudger to pry up the black plastic antenna housing from the rear panel.
*Lift the black plastic antenna housing out of the iPhone.

Step 25 — Rear Panel
*Remove the on/off switch button from the iPhone.

Step 26
*Remove the vibrate button from the iPhone.

Step 27
*Remove the two Phillips #00 screws securing the vibrator to the rear panel.
*Lift the vibrator up and out of the iPhone.

Step 28
*Remove the following 3 screws:
oTwo 1.5 mm Phillips #00 screws, one on either side of the dock connector.
o One 2.4 mm Phillips #00 screw near the ribbon cable labeled "4."

Step 29
*Lift the dock connector assembly up and out of the iPhone.

Step 30
*The rear panel and attached front bezel remain.

iPhone 3GS Teardown
Step 1
*The original iPhone was very difficult to open, but we expect the 3GS (like the 3G) to be quite serviceable. There are still two visible screws on the bottom of the phone, which is a good sign for easy opening.
*Remove the two bottom screws with a Phillips #00 screwdriver.

Step 2
*A small suction cup is your friend. A large suction cup may also be a fun toy.
*There are seven numbered connectors on the 3GS, up from six on the 3G. Connector number seven is in the lower right corner, just above the dock connector.



Step 3
*There are three cables holding the LCD and digitizer to the rest of the logic board. Disconnecting them is as easy as 1-2-3.
1: LCD panel

2: Digitizer

3: Ear speaker

Step 4
*Here's the two halves.
*All the chips on the logic board are hidden beneath two large EMI shields. We'll have those removed in just a bit.

Step 5
*Just like the iPhone 3G, the LCD is pretty easy to replace. After removing 7 screws, the LCD simply lifts out.
*On the iPhone 3G, we see a lot more cracked digitizers than cracked LCDs. Replacing the digitizer is a little more work, and requires breaking out a heat gun or hair dryer.



Step 6
*Here's the fabled "Do not remove" sticker. It didn't stop us last year, and it's certainly not going to stop us this year.

Step 7
*Removing the logic board. Like the 3G, there is a single large PCB with all components.

Step 8
*The main logic board. There's a lot packed in here. Here's a high-res image of this shot.
*The Apple-logo chip is the primary Samsung ARM processor.
*The 16 GB of Toshiba flash are now on the front of the board, just below the Samsung ARM.

Step 9
*The other side of the logic board. You can see the battery contact pads in the lower right corner. Apple was again kind enough to not solder the battery to the logic board.
*Here's a high-res image of this shot.

Step 10
*Apple promises improved battery life with the 3GS. The battery is listed as 3.7V and 4.51 Whr. This comes out to 1219 mAh, compared to 1150 mAh on the 3G. That's only a 6% increase.


Step 11
*Video recording is a long-overdue feature of the iPhone 3GS. The 3GS records video at 640x480 resolution and 30 fps.
*The video recording quality appears acceptable, although not exceptional. You can see a video (taken using another iPhone 3GS) of us opening the phone.

Step 12
*The 3GS offers Voice Control. We're not sure yet why this feature couldn't be added via software to earlier iPhones. Perhaps the voice recognition requires a better microphone than in earlier iPhones or a lot of processing power, or maybe Apple just wanted to differentiate the 3GS.

*According to Richard Lai, the "Chinese (Cantonese) voice control works, but took a while to work out the magic words as there is no guide released yet (not out in Hong Kong until early July)." He also tested the "Chinese (Mandarin) and Chinese (Taiwanese), although the latter didn't work as well since [he doesn't] do the accent well."

Step 13
*Here's all the parts. We'll continue to perform further analysis.

SAMSUNG GALAXY GT-P7320 - GSM TELEPHONE TROUBLESHOOTING – POWER PROBLEM – TOUCH PROBLEM – SPEAKER PROBLEM – CHARGING TROUBLE

How to troubleshoot - Samsung galaxy tablet - GSM TELEPHONE GT-P7320 – power problem – touch problem – speaker problem – Charging trouble

Samsung galaxy GT-P7320: TROUBLESHOOTING 

Power On does not work

C1009 = 3.5V > 4.2V ?

Check CON1000 component and replace.

When Power key press, is R1500 is 0V ?
Check Power Key FPCB Part & C1519

MSM_PS_HOLD(R728) = 1.8V

After Check UCP400 circuit, Replace UCP400

Check U702 Power stage C794,C795 = 1.1V C787 = 1.8V, C776 = 1.8V,

After Check U702 circuit, Replace U702

Check U700 Power stage C740, C741 = 1.2V, C726 = 2.85V

After check U700 circuit, Replace U700

Check U1107 Power stage C1120 = 5V L1102 = 14~18V

After check U1107 circuit, Replace U1107

CP Power on does not work

Check the Setting-About device Baseband version

After SW D/L, recheck the Baseband version & if the reproducing, PBA is change.

Check U802 power stage C837 = 1.1V, C838 = 1.3V, C839 = 1.8V, C831 = 1.8V C832 = 2.85V

Check the U701 circuit & Replace U701

MDM _PS_HOLD = 1.8V

Check the R815,U806 circuit & replace U806

Check U600 power stage C607 = 1.1V

Check the U600 circuit & replace U600

Check the UCP600 state

Initial Failure

MDM_PON_RESET_N(C862), TP_MDM_PM_INT_N >= 1.8V(HIGH)

Check UCP400 (short, crack, etc.)

MDM2AP_WAKEUP(TP_M400), >= 1.8V(HIGH)

Check UCP600 (short, crack, etc.)

There is 32.768KHz wave forms at OSC701(C748) and OSC800(C835)

Replace OSC701 and OSC800

There is 32.768KHz wave forms at OSC701(C748) and OSC800(C835)

Replace OSC701 and OSC800

There are 19.2MHz wave forms at OSC700(C745) and 19.2MHz wave forms at OSC1100(C1104)

Replace OSC700 and OSC1100

LCD display OK?

Check the LCD part(short, crack, etc.)

Sound is OK?

Check the Audio Part(short, crack, etc.)

Insert SIM card

Check connection of HDC1001

re-connect and check again or change SIMsocket FPCB

Check the SIM Voltage. (R1033) >= 2.8

Change to the new SIM card. If it doesn`t still work SIM card after changing the SIM card, Check the UCP600 (Crack etc)

Abnormal charging

Check C1019 whether voltage is greater than 5V.

Check the TA and the DLC. (TA or DLC may not be connected properly)

Check C1101 whether the voltage reading is greater than 5V. C1011

Check U1003 chip

Check C851 whether voltage reading is greater than 4.2V

Check U803 chip (U803 chip may not work at room temperature)

Check C851 whether voltage reading is greater than 4.2V

Check U803 chip (U805 chip may not work) U805

Check C842 whether voltage is change when TA is connected

Check U803 chip (U803 chip may not work)

Microphone Part

Check main microphone function in cam recording mode

Check the status of MIC module

Replace MIC module

Check the HDC900 is connected

Connect the HDC900

L902 = 1.5V, L903 = 0.3V ? and check the soldering status

Check the U906 LDO and MIC. If there is crack, replace them

Speaker

Check speaker function. Play MP3 with maximum volume level.

Check the speaker module is soldered well.

Resolder speaker module

Check the L906,907,908,909 Signal when music is playing.

Check the U403 and near parts If there is crack, replace them

Check the C951, C954 Audio signal when music is playing

Check the U202 and near parts If there is crack, replace them

LCD

LCD is still off after PWR ON

Check the connection of HDC1100

Reconnect the HDC1100

Check the C1121 and High(about 18V)

Check the Backlight Driver IC(U1107)

Check C1110=1.8V, C1106=1.2V,C1108=3.3V

Check the PMIC(U702) DC-DC(U1100) BUCK(U1105)

Check the signal IDISPLAY_PCLK(TP1107) LCD_F(0)(TP1100)

Check the freq of C1105(19.2MHz)

Replace or resolder OSC1100

Replace LCD Module

Check the U1103

Touch Screen does not work

Check TSP Connector on Main PBA

Reconnect the SLC1200

Pin1 = 2.8 U1202 V(C1201)

Resolder or Replace U1202

U1200,1201 Pin J6 > 2.5V (C1204, C1208)

Resolder or Replace U1200,1201

U1200,1201 Pin J6 > 2.5V (C1204, C1208)

Resolder or Replace U1200,1201

Check the I2C signal of Sensor IC(R1200, R1201)

Resolder R1200, R1201

Replace TSP Module.

Tablet with support for GSM voice communication, SMS, and MMS
For Telstra in Australia

Network	Technology	GSM / HSPA / LTE

Launch	Announced	2012, Q1. Released 2012, Q1
	Status	Discontinued

Body	Dimensions	230.9 x 157.8 x 8.6 mm (9.09 x 6.21 x 0.34 in)
	Weight	458 g (1.01 lb)
	SIM	Mini-SIM

Display	Type	PLS TFT capacitive touchscreen, 16M colors
	Size	8.9 inches, 229.7 cm2 (~63.0% screen-to-body ratio)
	Resolution	800 x 1280 pixels, 16:10 ratio (~170 ppi density)
		TouchWiz UX UI

Platform	OS	Android 3.2 (Honeycomb)
	Chipset	Nvidia Tegra 2 T20
	CPU	Dual-core 1.5 GHz Cortex-A9
	GPU	ULP GeForce

Memory	Card slot	No
	Internal	16GB 1GB RAM, 32GB 1GB RAM

Main Camera	Single	3.15 MP, AF
	Video	720p

Selfie camera	Single	2 MP
	Video

Sound	Loudspeaker	Yes, with stereo speakers
	3.5mm jack	Yes

Comms	WLAN	Wi-Fi 802.11 a/b/g/n, dual-band, hotspot
	Bluetooth	3.0, A2DP
	GPS	Yes, with A-GPS
	Radio	No
	USB	2.0

Features	Sensors	Accelerometer, gyro, compass
		TV-out MP4/DivX/Xvid/H.264 player MP3/WAV/eAAC+/OGG player Photo/video editor Quickoffice HD editor/viewer

Battery		Non-removable Li-Po 6100 mAh battery
	Stand-by	Up to 500 h
	Talk time	Up to 7 h

Misc	Colors	Black
	SAR	1.75 W/kg (body)

ASUS ZENFONE 2 DISPLAY ASSEMBLY REPLACEMENT

Asus Zenfone 2 Display Assembly Replacement

The original screen has the following code stamped on the back of the display: "TL055VDXP34-00".
The first replacement display assembly (did not work) had the following code: "TLD55VVXP31-00".
The second replacement assembly (did work) had the following code: "TL055VDXP34-00".
On that basis, it is suggested  that the first unit I received was an earlier model, and was the incorrect part. I assume that the replacement display assembly must be model TL055VDXP34-00

Remove back cover, sim card(s), and memory card.

NOTE: Remember to remove the one next to the camera (this might be covered by a small sticker).
This cover should remove quite easily - if you can't lift it, count those screws! There should be 14. Again - check that one by the camera that is somewhat hidden.
NOTE These screws are actually the only screws which hold the phone together. Once these are out and the cover is up, the speaker unit will fall away from the phone.

Panel removal – removal of internals

To remove the plastic panel pry it up at one end, and use a sharp blade to separate the double sided tape between the battery and the plastic panel.
NOTE: remove the double sided tape completely when I put it back together. It doesn't seem to really be necessary.

Remove the antenna cable, vibrate motor, and four other connections.
The three above the battery pop up away from the phone.

To disconnect the flat cable at the bottom of the battery you need to first remove the yellow plastic sticker covering it. Next lift the white tab to release the cable, then gently pull the cable out towards the base of the phone.

There are two types of different adhesives holding in the battery that I have encountered. One is double-sided foam tape (easy to remove). The other is some kind of self-amalgamating tape (hard to remove). Please be VERY cautious when removing the battery.
Ii is recommended heating the front side of the screen prior to completing this step (the battery tape is fixed behind the back of the screen).
The adhesive holding down the battery is located close to the side where the antennas are located (right side when looking down). To remove the battery, heat up the battery with a hair-dryer, then gently pull up away from the phone on the opposite site (left side).
NOTE: Be gentle with the small metal tabs on the edge of the battery; these are quite flimsy and will bend if used to force the battery. I removed the double sided tape completely here too, and did not replace it.

To remove the display itself you'll need to apply heat. I had a heat gun - this makes it a lot easier  but you could use a hair drier if you don't have a heat gun. For the sake of comparison - the heat gun took around 30 seconds to heat the display completely, which would take 3-5 minutes with a hair drier.
Once the adhesive behind the screen has been heated up, work your way around the edges of the screen with an opening pick or thin rigid guitar pick. The display will begin to separate from the housing.
Once mostly free, carefully lift the display cable through the hole in the top of the phone body.
Again; you're replacing this cable completely, so don't worry too much about it.

Removal of speaker grill

separate the speaker grill from the original display, clean the adhesive off, and attach it for the new screen. it easier to attach the grill to the actual phone body (rather than the display assembly)

Because of the condition of the adhesive for the screen assembly,  replace the adhesive completely. You could skip this step, but  it is worth cleaning it up.
To remove the existing adhesive  just use the sharp razor blade and worked  peeling it all off.
NOTE: This would be a good opportunity to 'test fit' the new screen (without adhesive) so you can see where the cables need to go. There is one which goes up behind the screen and through the middle of the phone, and another which goes through the top hole. The top one is a strange shape, and needs to go through sideways first.

To attach a new display

3M double sided adhesive tape to go around the edge of the new screen assembly.
NOTE: The replacement adhesive I used was 3M double sided adhesive tape (2mm) - the tape can be purchased  was around from a mobile phone repair supplies store. The tape was too wide and not thick enough, so I doubled it over.
It fit perfectly once I did that. Unless you can find thicker double sided tape which is closer to the original adhesive, I would recommend this approach.

Once the adhesive is all laid out on the phone, put the screen assembly on. start from the top and slide the top cable through the hole, then slowly worked my way down to the bottom.
NOTE: don't press too hard on the adhesive until you are sure that both cables are through to the back, and that the screen is sitting well in the body.

Display cable attach

Looking at the phone from the back, remove the adhesive backing from the display cable and carefully position the cable between the four black markers.

After the new screen is fixed in, start the re-assembly. This is effectively the same as disassembly, but in reverse. There were only a couple of parts that make note of:

a) Keep an eye on the display cable that comes in through the top. It got caught on the double sided tape, and needed to be pulled through.
b) You will need to use a little bit of force to mount the processor unit between the four plastic clips. Be careful when doing this.
c)  completely remove the double sided tape from under the battery and under the plastic case.
d) If you lose any of the yellow plastic cable stickers, you can borrow a piece from your old display assembly.

T-MOBILE HUAWEI PRISM – DISASSEMBLING PROCEDURE – HOW TO REMOVE THE COMPONENTS

T-Mobile Huawei Prism – Disassembling procedure – How to remove the components

DISASSEMBLING PROCEDURE
Place the phone face down.
Slide the back cover panel away from you, until you hear a click.
Lift the back cover panel off.
Place the plastic opening tool in the gap between the camera and battery.
Pry the battery up.
Remove the battery.
Locate the six 3mm torx screws holding the plastic mid frame in place.
Remove the six torx screws with the T4 torx screwdriver.
Place the plastic opening tool in the charging port.
Pry up to loosen the bottom edge of the plastic mid frame.
Work the plastic opening tool along the seam, until the the plastic mid frame is detached.
Remove the plastic mid frame.
Locate the power button.
Locate the volume botton.
Slide the two buttons up and out of the phone.
The removed buttons are incredibly easy to lose, so be sure to keep an eye on them.
Locate the power button sensor strip.
Place the plastic opening tool under the sensor strip.
Pry the sensor strip up.
Locate the volume button sensor strip.
Place the plastic opening tool under the sensor strip.
Pry the sensor strip up.
Locate the outer screen connector.
Place the plastic opening tool under the screen connector.
Pry the screen connector up.
Locate the inner screen connector.
Place the plastic opening tool under the screen connector.
Pry the screen connector up.
Place the plastic opening tool in the charger port.
Pry the motherboard up.
Remove the motherboard.
Pick up the front half of your phone with your left hand.
Slowly rotate the phone so the screen falls into your right hand.
Be extremely careful not to drop the screen.

MOTOROLA DROID X – DISASSEMBLING PROCEDURE – HOW TO REPLACE THE MOTHER BOARD

Motorola Droid X – Disassembling procedure – How to replace the mother board

Locate the power button at the top of the phone. Depress power button for 2 seconds until a menu appears.

Once the menu appears, select the "power off" option. Wait until the phone is completely off.

Place thumb on the back cover, and push down towards the bottom of the device. Once the cover releases, pull it away from the phone and set it aside.

Find the yellow pull tab located in the upper left corner. Pull the tab until the battery dislodges.

Grab the battery by the raised edge, and remove it from the case.

The battery has been successfully removed.

Remove the micro SD card from its connector.

Locate the seam between the back case and the end cover on the top edge of the phone.

Use the plastic opening tool to detach the two clips by wedging the tool into the right side of the seam and moving right to left. Once the cover comes off set it aside

Repeat step on the bottom cover.

Use a T5 Torx screwdriver to remove the screws in each corner of the phone.

The screws are very small so make sure not to lose them.

Flip the phone over and locate the screw on the middle of the left side. Unscrew it using the T5 Torx screwdriver and set it aside.

Identify the screw located in the bottom right corner of the battery case. Remove the screw with a T5 (or in some cases T6) torx screwdriver and set it aside.

Locate the seam along the right edge of the phone. Use the prying tool to disconnect the two clips along the edge.

Locate the two clips on the inside of the case and use the spudger tool to detach them from the case. To detach each clip, use the sharp end to press the small, black plastic in the center of the clip.

After the clips are detached, remove the back case and set it aside.

Remove the screws along both sides of the motherboard using a T3 Torx screwdriver. On some phones this may require a #1 Phillips Screw Driver.

Carefully remove the white connecting wire from the motherboard using tweezers.

Use caution, this wire is delicate.

Scrape away the electrical tape that covers the LCD and digitizer cable using the spudger tool or a fingernail.

Use the spudger tool to pop the Digitizer cable off of the motherboard.

Carefully flip the small white connector up and away from the motherboard.

Gently pull the flat gold cable out from the connector.

Carefully lift the motherboard and camera module up. Do not remove it from the phone.

Using the spudger tool, pop the black cable connector off of the motherboard.

It is to safe remove the motherboard from the phone.