Sunday, June 26, 2016

HTC Desire 510 – Disassembling procedure – How to remove the case – How to remove the earpiece – Mobiles and smartphones repair and service

Category: Mobiles and Smartphones Repair and Service 

Contents of this article 

  • How to remove the case
  • How to remove the mother board 
  • How to replace the Earpiece 

HTC Desire 510 

DISASSEMBLING PROCEDURE 
Switch off the phone, remove the battery and any installed SIM and memory cards. Remove 7x Torx T5 screws.
Use a plastic tool to remove the rear bezel. The loudspeaker is on the inner side of the rear bezel.
Disconnect the touch screen flex cable. Disconnect the light sensor flex cable. Unstuck the vibra-motor from the middle frame. Remove the coaxial antenna cable from the middle frame. The LCD display flex cable is connected to the bottom side of the board.
At the upper left side, the board is held by a plastic locking clip. Use a plastic tool and start the separating from here. Gently disconnect the LCD display flex cable. Now remove the logic board.
Front and Main Cameras
Main / Rear camera.
EARPIECE
The earpiece is in the upper part of the middle panel.


Toshiba Satellite Laptop – E205 - Disassembling - How to remove the keyboard How to replace the Optical drive – Laptop repair and service

Category: Laptop Repair and Service 

Contents of this article 

  • How to remove the keyboard 
  • How to remove the case 
  • How to remove the CD Drive 

Toshiba Satellite E205

OPTICAL DRIVE REPLACEMENT PROCEDURE 
With the battery away from you, slide the locking clips out.
The left clip stays, the right clip is spring loaded. Slide the battery away from you.
Use a spudger to carefully pry up the keyboard screw cover.
Remove the two screws securing the keyboard to the chassis.
Carefully tilt the keyboard towards you and release the ribbon cables.
Use a spudger if needed to release the latch. The latch slides out. The keyboard is now free and can be set aside.
Remove the five black screws
Remove the one silver screw
Flip the laptop over so the bottom is facing up.
Using a spudger, remove the seven rubber inserts.
The feet only go in one location on the bottom of the laptop, so save yourself some time and track where they go.
Remove the six silver screws.
Remove the one black screw.
Stand the laptop up on end.
Remove the two rubber inserts from the back of the laptop. One insert is on each side of the laptop.
Remove the two screews.
Carefully work a spudger in the crack at the back of the laptop and separate the small rubberized section from the bottom of the laptop.
Remove the four screws.
Disconnect the black wireless antenna lead.
The bottom of the laptop is now ready to lift off.
Carefully work a spudger around the seam of the laptop separating the bottom from the rest of the laptop.
There is a data connection at the front of the laptop that needs to be disconnected.
Use a spuder to carefully disconnect the wire from the motherboard. Once this is free the bottom will come off.
Locate optical drive
Remove the three screws securing the optical drive.
Slide the optical drive away from the motherboard, and carefully lift up.

Tech Troubleshooting – Samsung French door Refrigerator - Samsung RFG29PHDBP - RFG29PHDPN - RFG29PHDRS - RFG29PHDWP – Self diagnosis – Error codes and causes – Home appliances Repair and service

Category: Home Appliances Repair and Service 

Contents of this article 

  • Self Diagnosis 
  • Error codes and causes 
  • How to test the fan circuit 

Samsung RFG29PHDBP - RFG29PHDPN - RFG29PHDRS - RFG29PHDWP

Self Diagnosis
Press both buttons (Energy Saver– Lighting) simultaneously (No sound when both buttons are pressed at the same time) ‟til the display quits blinking and beeps, 8-12 seconds, then release and read Fault Codes.
This will also cancel the Fault Mode created  by self-diagnosis at power up.
Forced Mode: Press both buttons (Energy Saver– Fridge) simultaneously (No sound when both buttons are pressed at the same time) „til it beeps and goes blank, 8-12 seconds
Wait 5 seconds between button pushes
# Press Freezer button one time at the Test Mode to Force Compressor High Speed Run, measure fan and Compressor volt ages at main PCB
# Press Freezer button a second time to Force Mid Speed Run
# Press Freezer button a third time to Force Low Speed Run
# Press Freezer button a forth time to Force De frost of Fridge & Freezer, measure defrost voltage at main PCB.
Component Value
Component
Resistance
Wattage
Voltage
Freezer Defrost Heater
60Ω
240
120vac
Fridge Defrost Heater
120Ω
120
120vac
French Mullion Heater
1800Ω
8
120vac
Ice Duct Heater
3600Ω
4
120vac
Dispenser Heater
7200Ω
2
120vac
Water Tank Heater
72Ω
2
12vdc
Sensors
2.5kΩ-89kΩ
N/A
1~4.5vdc
Fans
N/A
N/A
7~12vdc
DC FAN MOTORS
Brushless DC Fan motors are used to save energy. The fans operate at two speeds. Fan speed information is read by the Main PCB. If the fan speed exceeds 600 RPM or the speed is too slow, or stopped the fan drive circuit is disabled, After 10 seconds the circuit tries again with 3 seconds of DC voltage If the fan continues this activity for 5 cycles, 10 seconds off 3 seconds on, the fan drive circuit is disabled for 10 minutes.
TO TEST THE FAN CIRCUIT VOLTAGE.
Power off and back on to check the DC voltage to the motor, wait from 10 to 60 seconds for the fan voltage to kick in, and then check fan voltage, the average reading is 9 VDC. If you get 3 seconds of voltage every 10 seconds for the 5 fan power up cycles, then the Main PCB is good.
NOTE: You may need to put unit in FORCED FREEZE mode to activate the fans/compressor. If the fan blade is blocked by ice, then defrost and check the motor again, after removing power from the unit. If the evaporator is ice blocked and thus blocking the air flow, the fan will over RPM and is stopped. Remove ice and check the motor again. If everything is clear around the fan blade then the motor would be at fault. Continuous fan errors will be displayed on the front panel display. PLEASE NOTE: The door switches control the evaporator fan motors. Have them closed to test the motors. Delay time 10 – 60 seconds.
Heat Release Ice Makers
Heat Release Ice production Explanation
38 minutes after the water fill is complete, the control board will check the temperature of the eject Thermistor, on the Ice Maker Head, if the Thermistor reads a temperature lower than 18.5 degrees for more than 5 seconds, then the ice production process is completed. The Ice maker will harvest if the ice bucket is not sensed as full. If a Fault Mode is detected with the Ice Maker operation, the Ice Maker stops working for 3 hours. Which means, the Ice Maker checks the operation every 3 hours until it works properly
Heat Release I/M Test Mode
Press and hold the ICE TEST S/W for at least 1.5sec, the
harvest function will start. If the ice maker Thermistor is below 0 degrees the Ice maker heater turns on for about 2 minutes. If the temperature exceeds 0 degrees, Ice maker heater turns on for 30 seconds. After the Ice maker heater turns on for 30 seconds, the heater turns off and then Ice maker harvest motor turns on. The motor will rotate in right direction for about 3 minutes, after this, water supply valve is
 urned on, then the valve is turned off, the test mode is completed. If the above operation is not carried out within 6 minutes, it will go into a fault mode.
FREEZER TEMPERATURE CONTROL BY THE ICE MAKER
Interior Temperature of the freezer will be set to -14 degrees Fahrenheit until the ice bucket is full. When the ice bucket is full, the freezer will maintain original set temperature. Also, whenever the ice is used, the freezer will again set to -14 degrees Fahrenheit. Selecting "Ice Off” will allow the freezer to be controlled by the set temperature. If water is not hooked up, the freezer will always be at –14 unless “Ice Off” is selected.
ERROR CODES AND CASUSE
1 E
FZ SENSOR ERROR
2 E
R SENSOR ERROR
4 E
FZ DEF SENSOR ERROR
5 E
R DEF SENSOR ERROR
6 E
AMBIENT-SENSOR ERROR
The respective sensor is read as open or shorted, check the wiring connections in the respective compartment and at the Main PCB
13 E
HUMIDITY-SENSOR ERROR
The Humidity sensor is read as open or shorted, check the wiring connections in the respective compartment and at the Main PCB
14 E 
IM SENSOR ERROR
15 E
ICE RM SENSOR ERROR
The respective sensor is read as open or shorted, check the wiring connections in the respective compartment and at the Main PCB
21 E
FZ FAN ERROR
The Freezer Fan motor is read as not connected or the fan has stopped, check the wiring connections in the freezer and at the Main PCB
22 E
R FAN ERROR
The Ref. Fan motor is read as not connected or the fan has stopped, check the wiring connections in the freezer and at the Main PCB
23 E
C-FAN ERROR
The Comp. Fan motor is read as not connected or the fan has stopped, check the wiring connections in the freezer and at the Main PCB
24 E
FZ DEF FUNCTION ERROR
The freezer defrost heater is read as open or the heater has been
heating continuously for more than 80 minutes.
25 E
R DEF FUNCTION ERROR
The refrigerator defrost heater is read as open or the heater has been heating continuously for more than 80 minutes.
39 E
IM FUNCTION ERROR
The Icemaker release heater reads as open circuit
40 E
ICE-ROOM-FAN ERROR
The Ice Room Fan motor is read as not connected or the fan has stopped, check the wiring connections in the freezer and at the Main PCB
41 E
MAIN<->LCD COMM ERROR
The Main PCB and the LCD display are not communicating properly verify the wiring at both PCB’s
81 E 
COMP STARTING FAILURE  
The compressor did not start properly, check for an overload condi- tion
82 E
COMP IPM FAULT ERROR
Inverter power control issue, Check the Inverter Drive PCB
83 E
COMP ABNORMAL CUR- RENT DETECTION
Excessive current detected at the Compressor check the compres- sor windings for shorts
84 E
COMP MOTOR LOCKED OVER RPM ERROR  
Compressor Over speed error check for low refrigerant levels
85 E
COMP UNDER VOLTAGE
Low voltage to the compressor Check the DC supply from the Main PCB
86 E
COMP OVER VOLTAGE
Over voltage to the compressor Check the DC supply from the Main PCB

Lenovo 41-80 – How to remove the HDD – How to remove the CD ROM – How to test the Battery charger – Laptop repair and Service

Category: Laptop Repair And Service 

Contents of this article 

  • How to remove the HDD
  • How to remove the CD ROM
  • How to test the Battery Charger 

Lenovo 41-80 

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.
How to remove Battery pack
Unlock the manual battery latch 1. While holding the spring-loaded battery latch in the unlocked position 2, then remove the battery pack in the direction shown by arrow 3.
How to remove Optical drive
Remove the screw 1. Then remove the optical drive by arrow 2.
How to remove Hard disk drive
Remove the frame fixing screws 1. Remove the hard disk drive in the direction by arrow 2

How to replace the Wifi Card – Xbox one – How to remove the case – Laptop repair and service

Category: Laptop Repair and Service 

Contents of this article 

  • How to remove the side cover
  • How to remove the case
  • How to remove WIFI card 

Xbox one WIFI

With a plastic opening tool, pry the side vent from the console. Start from the back edge and work towards the front of the console.
Slide the black angled tab behind the silver button toward the back of the console and set it aside.
Rotate the Xbox and remove the warranty sticker from the back. Removing this seal and opening the case of the Xbox voids your warranty with Microsoft. Use a plastic opening tool on the back to pry the top of the case from the bottom. Use an up and out motion to dislodge the clips. There are multiple clips to release on the back and two on the sides. This step may take up more time than the others, keep prying with the plastic opening tool and when you release one clip, wedge something underneath it so it doesn't close again.
Carefully lift the top of the case, note that there is a wire connecting the front panel to the motherboard. Take care not to break this. Using a spudger, release the ribbon wire from the front panel. The top case is now free, set it aside.
Remove the speaker by squeezing the the tab on the black plastic mounting piece and lifting it up. Carefully unplug the connector from the green front panel board. The speaker is now free, set it aside.
Unscrew the two 8.2mm T-9 screws securing the Wi-Fi board to the chassis. Using the spudger, gently lift the antenna connector from the Wi-Fi board.
Using a spudger and a motion similar to the previous step, gently lift the antenna connector from the green board on the front. Carefully pull out the clips securing the antenna wire to the chassis, releasing the wire.
Carefully pull the Wi-Fi board straight up to release it from the chassis. The Wi-Fi board is now free.

Huawei Mobile phones - Huawei u7519 – Disassembling procedure – How to remove the case – How to remove the mother board – How to remove the display – Mobiles and Smartphoones Repair and Service

Category: Mobiles and Smartphones Repair and Service 

Contents of this article 

  • How to remove the case 
  • How to remove the mother board 
  • How to replace the touch screen 

 Huawei u7519

DISASSEMBLING PROCEDURE 
Take off the back covering of the phone along with the battery and SIM card.
The SIM card is located above the battery.
Using the Phillips #00 Screwdriver, take out the four small screws located at the four corners of the phone. Save the screws. They will be needed for reassembly.
Using the same screwdriver, take out the two bigger screws located on each side of the battery compartment. NOTE: Save the screws. They will be needed for reassembly.
Once all the screws are removed, use the iPod opening tool to pry off the back covering of the phone along the edge of the back cover and you will have access to the motherboard. Note: The power and volume buttons will fall out of the phone. Set aside for reassembly.
Carefully pull the backing of the phone from the motherboard with your hands.
To remove front case from the motherboard, first pull back the silver tab (highlighted in blue) and the orange tab (highlighted in red).
Once the silver and orange tabs are pulled back, carefully pull the motherboard apart from the front case.
For reassembly: Place the new motherboard on the front case.
Snap the tabs back into place. Replace back casing and snap in place.
Screw in screws. Note: you can also follow these steps in reverse, which is the same process as outline above. Note: replacing the power and volume buttons may be tricky. For ease, use tweezers. You have now successfully replaced the screen for the phone.

Saturday, June 25, 2016

How to replace the optical drive Cable - Apple MacBook Pro 15 – Laptop repair and service

Category: Laptop Repair and Service 

Contents of this article 

  • How to remove the bottom cover
  • How to remove the Battery 
  • How to remove the Optical drive 

 Apple MacBook Pro 15

OPTICAL DRIVE REPLACEMENT PROCEDURE 
Remove the following ten screws securing the lower case to the upper case: Three 13.5 mm (14.1 mm) Phillips screws. Seven 3 mm Phillips screws.
Using both hands, lift the lower case near the vent to pop it off two clips securing it to the upper case. Remove the lower case and set it aside.
Remove the two 7.4 mm Y1 Tri-Wing screws securing the battery to the upper case. Note: For certain repairs (e.g. hard drive), removing the battery is not necessary but it prevents any accidental shorting of electronics on the motherboard. If you do not remove the battery, please be careful as parts of the motherboard might be electrified. You do not necessarily have to follow steps 3-6 to remove the battery in order to replace the hard drive. However it is recommended to remove all power sources from electronics before working on them.
Use the tip of your finger to carefully peel back the corner of the warning label to reveal a hidden Tri-Wing screw. Remove the last 7.4 mm Y1 Tri Wing screw securing the battery to the upper case.
Lift the battery by its plastic pull tab and slide it away from the long edge of the upper case.
Do not try to completely remove the battery just yet.
Tilt the battery away from the logic board enough to access the battery cable connector. Pull the battery cable connector away from its socket on the logic board and remove the battery from the upper case. Pull the battery cable connector away from the center of the logic board.
Use the flat end of a spudger to pry the AirPort/Bluetooth ribbon cable connector up off the logic board.
Disconnect the camera cable by pulling its connector away from the socket (toward the optical drive) on the logic board.
Use the flat end of a spudger to pry the optical drive connector up off the logic board.
Remove the two Phillips screws securing the AirPort/Bluetooth board housing. Carefully rotate the AirPort/Bluetooth board housing (with AirPort/Antenna cables still attached) out of the lower case.
Remove the following three Phillips screws securing the optical drive to the upper case: One 4.5 mm Phillips screw securing the optical drive bracket to the upper case near the fan.
Two 2.5 mm Phillips screws securing the optical drive to the upper case near the optical drive opening.
Lift the optical drive near its connector and pull it away from the upper case to remove it from the computer.
Pull the optical drive cable out of the optical drive. Be sure to pull by the edges of the connector, not by the cable itself.