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Mobile Repair

You may have a nice mobile phone and also you may have to spend a lot of money to buy your beloved ones. But in case of accident or some how mobile phones should be in trouble. Then you have to spend more credits to repair. We are here for you with some special mobile phone service.

We try our best to repair your handsets and give you enough information how to repair it. Our mobile blog is specially made for all mobile related facts. Mobile engineers could download mobile schematic diagrams and manuals for free.

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We have launched mobile phone repair course in some Asian countries. Most interesting thing is that we recycle refurbished mobile phones.

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Nokia 2300-rm4-Schematics

http://images.techtree.com/ttimages/story/Nokia-2300.jpg

The Nokia 2300 is a very basic phone. The display is black and white with very low resolution, and there are few features. A radio is included, but it is mono only. One of the biggest problems with the 2300 is the weird keypad design that uses joined-up and overlapping keys. Not easy to use, not very reliable, and not recommended!
Actually the Nokia 2300 mobile phone is owned by my wife. I bought it as a birthday present for her. The result, I got more time to get hold of the phone to observed and have reviewed it. SMS upgrade has gone too far these days especially with Nokia phones. Superb audio quality can be expected from this phone. I like the way the polyphonic ringing tone sounds of this phone. They're distinctive and clear. You can download or compose melodies as well. The FM stereo radio is excellent. A stereo headset comes with the package, great for hands-free calls and music listening! I have no problem with the reception; it's always in full bars wherever I go. Just one or two keypresses and you can have the function you need. Of course not all functions, menus, and sub-menus are available in this feature. We all know that phones are getting smarter and smarter these days. And someday the function we thought just another trash of today, will one day just useful as technology advances and that would be also added in this feature. Over-all, the phone is a great improvement intended for low-end-users. If picture editor feature has been added in this phone, then it would surely surpass the performance of Nokia 33XX series, 2100, and 1100 phones respectively.
Download Nokia 2300-rm4-Schematics

Repair NOKIA 3510i / 3530 Circuit

Connecting a nokia 3510i / 3530 display to the parallel port:

The wiring is based on the wiring of optrex 323 and pcd8544-based displays to the parallel port. As i didn't know of any other projects like this (with nokia 3510i/3530 displays connected to the parallel port) i had to chose a wiring-'standard' for myself.

Wiring

Signals:

+------------------------+

1 2 3 4 5 6 7 8
# # # # # # # # 1 .. /RES
===#=#=#=#=#=#=#=#== 2 .. /CS
+--====================--+ 3 .. GND
4 .. SI (SDATA)
5 .. SCLK
rear view 6 .. Vio
connector is visible 7 .. Vflash
8 .. Vout
N3510i

+------------------------+

Signal name PC LCD Signal name

---------------------------------------------------------
Data 0 2 4 SI serial data input of LCD
Data 1 3 5 SCLK serial clock line of LCD
Data 2 4 2 /CS chip select
Data 5 7 1 /RES active low reset
Data 7 9 - Backlight (optional, not on display)
Ground 18 3 GND Ground for printer port and display voltages
-- 6 Vio 1.8V chip power
-- 7 Vflash 2.8V display power
-- 8 Vout output of display-internal dc/dc converter
(Vout -> capacitor -> GND to avoid noise)

circuits:

connecting n3510i/3530 displays to the parallel port

Part list: Part# Type Value Annotation

---------------------------------------------------------------------------------------
R1-R5 Resistor 1 kOhm
R6 Var.Resistor eg. 100 Ohm or higher value if needed;
or simply a resistor with fixed value
C1 Capacitor eg. 0.1 uF for stabilisation of display
(0.22 uF or other values are fine just as well)
T1 Transistor eg. BC547
D1 Diode eg. 1N4148

Remarks:
R5, R6, T1, D1 are needed in combination with LED background light only!be warned: without background light the display is hardly readable!
Vio ought to be connected to 1.8V but I did quite well without even connecting it.as always: just because it worked for me doesn't mean that it will work for you!
i used the original SMD-leds from the Nokia 3510i cellphone. they needed some value around 3.1V.as i didn't like to generate two voltages, i also connected Vflash to 3.1V (rather than connecting it to the recommended 2.8V)and one again: just because it worked for me doesn't mean that it will work for you!if your display dies in flames don't blame me.

Hardware reset vs. software reset:
to save one wire it is possible to replace the /RES-wire through a R/C-circuit.
part-list is the same as above with the following exceptions: Part# Type Value Annotation
---------------------------------------------------------------------------------------
R4 Resistor 10 kOhm
C2 Capacitor 10 uF

Repair NOKIA 5300

Nokia 5300 xpress music disassembly

Tools required: Torx 6 screwdriver

1) Run your fingernail around the edge of the front cover to release the clips which hold the cover in place

2) You can now remove the front cover and your phone will look like below. Remove the four screws you can see

3) Once you've removed the four screws you can lift away the metal frame which sits on top of the LCD

4) You can now lift the LCD from the phone. The LCD is attached by a connected which connects like a plug and socket. Simply lift it upward to unplug. You can now remove the LCD

5) You can now replace the LCD. Reverse the whole procedure for reassembly

Nokia N73 disassembly

NOKIA N73

N73 DISASSEMBLY:

You are required :

1) New screen
2) Phone cover
3)Screw drivers
4)Plastic shim

STEP1:
Remove battery cover,Battery, Memory Card and SIM card.

Step2:
You should nowhave the front cover removed as picture

Step3:
The LCD screen is held in place by a metal frame which need to be uncliped around its edge for removal.

Step4:
The LCD screen will now be lose and can be removed.It will be attached to the phone by a ribbon which attaches like a plug and socet.Simply lift it upwords to unplug it.

Step5:
You can now lift away the LCD and replace with new.Revers the whole procedure for reassembly.
S

ee picture bellow>>

Read

Repair NOKIA N95 (Slide Fixing)

N-95 Slide Fixing

Wanna fixing your NOKIA N-95 slide by OWN:

FIRST OF ALL THIS PROCEDURE IS NOT VERY COMPICATED BUT YOU MUST GIVE SO MUCH ATTENTION. YOUR HANDSET CAN COUSE DAMAGE.AND IF YOUR HANDSET HAVE A GUARANTEE THIS WORKS CAN CANCEL YOUR GUARANTEE. ( IF YOU TAKE EVERYTHINK BACK I GUESS NOBODY WILL UNDERSTAND )

NOW WHAT WE NEED FOR:
- NOKIA N95 WITH JERKY SLIDER.
- Scissors
- Tweezers
- T5/T6 SCREW DRIVER
- TAPE ( 3M OR SCOTH WILL BE FINE )

AFTER SET ALL STUFF THAT WE NEED. NOW WE ARE STARTING.FIRST TAKE BACK COVER AND BATTERY OFF..

AS SHOWN IN PICTURE GO RIGHT DOWN SIDE OF THE PHONE AND SLOWLY TAKE OUT THE WHOLE BACK COVER.

AS SHOWN IN PICTURE

AND TAKE ALL CAREFULLY,

NOW WE NEED TO TAKE OUR 3 SCEWS THAT SHOWN IN PICTURE AT THIS

TIME PLEASE BECAREFULL MORE, DOWN PART OF THIS SIDE HAVE A IMPORTANT AND SENSITIVE PARTS.

AFTER TAKE 3 SCREWS OUT.

WE YOU OUR TWEEZERS TO TAKE BLACK METAL PART OF SLIDER ( AS SHOWN ON PICTURE ) ( SLIDE PROBLEM COMES FROM THIS METAL PART AND THE PLASTIC PART. YOU WILL SEE AFTER TAKE IT )

NOW GIVE ATTENTION WHAT YOU WILL DO NEXT, !!!!!!

NOW HOLD YOU PHONE LIKE IN PICTURE AND GENTLY PUSH UP, DONT PUSH IT SO MUCH YOU CAN COUSE SLIDER BROKE ( OTHER PART IS ALSO SCREWED AT THIS TIME !!! )

NOW YOU WILL SEE A SMALL SPACE AT THE MIDDLE OF THE PHONE

NOW WE WILL CUT A SMALL PIECE OF TAPE ( AS SHOWN IN PICTURE ) JUST A SMALL ONE WILL ENOUGH. IF YOU USE TOO MUCH IT WILL NOT WORK EASLY.

WITH THE TWEEZERS WE PUT CUTTED TAPE IN THE PLASTIC PART, BUT IN PICTURE I HAVE MADE A MISTAKE THAT I FIX MINE YOU HAVE TO PUT TAPE TOP OF THE SCREW HOLE NOT ON THE HOLE. AND PUSH THE UPPER PART OF THE TAPE INSIDE OF THE SPACE.

THAN WE PUT THE UPPER PART OF THE PHONE AGAIN IN THE HOLE AND PUT BLACK METAL PART .

WE PUT 3 SCEWS AGAIN AND PUT BACK COVER AND NOW WE HAVE BETTER N95 SLIDER.

Motorola A1000 disassembly

Motorola A1000 disassembly

If you require a new screen, phone cover and screwdrivers, they can be purchased in any Motorola Customer Service Center.

Tools required: T5 screwdriver

Turn your phone over so the camera is facing you and remove the battery cover and battery. Then remove the 8 screws (circled below). You can now separate the back of the housing from the rest of the phone.

Once you have removed the back of the housing, you'll see 2 more screws. Remove these. You can now remove the front part of the housing from the main body of the phone.

Your phone should now look like the image below.

Carefully remove the keyboard interface from he main board of the phone.

Your phone should now look like the image below. Carefully unclip the connector (circled below) from the main board. You should now be able to lift the screen from the main board.

With the screen removed, the job is nearly finished. There are five clips around the screen which need to be removed (two of them are circled below)

You should now have the screen separated, as below

Reverse the procedure for disassembly and it's finished.

Motorola C200 Exploded View

Motorola C200 Exploded View

When dismantling any phone, great care should be taken to ensure that no damage is caused to any of the parts. Rough handling may result in severe damage of many parts, and if proper anti-static procedures are not followed, electrostatic damage may result in any electronic component.

Before commencing, it is recommended that the correct tools are purchased for the job in hand - at the very least, you will require a Torx T6 screwdriver.

Please remember that this is an exploded view, and not a step by step guide - however, so long as you're careful, take your time and follow the diagram carefully you shouldn't have too many problems.

MOTOROLA-i450 FULL HOUSING INSTALLATION

MOTOROLA-i450 FULL HOUSING INSTALLATION



For example
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5

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Cheers !

Motorola L6 disassembly

Motorola L6 disassembly

Tools required: Torx 5 screwdriver, tweezers, plastic shim such as a guitar plectrum

Removing the antenna cover:
1. Remove the battery cover, battery and SIM
2. Use the screwdriver or tweezers to gently pry off the RF grommet located on the antenna cap (below)

Removing the antenna cover:
3. Carefully use the flat end of the tweezers to release two latches on the top end of the antenna cover, then carefully lift the antenna cover away from the phone.

Removing the transceiver PC board shield:
4.Using the T5 screwdriver, remove the 6 housing screws from the phone. Set the screws aside for re-use (see Figure 10).
5.Lift the metal shield away from the phone.

Removing the housing:
6. Insert the plastic shim between the front housing and the chassis assembly. Slide the plastic shim around the phone between the front housing and the phone to release the housing catches along the sides of the front housing

Removing the housing:
7. Carefully lift the bottom end of the front housing over the phone. The earpiece will still be connecting the front cover to the rest of the phone at the top of the phone so be careful

Removing the earpiece speaker from the front housing:
8. Use the plastic shim or tweezers to separate the earpiece speaker from the front housing

Removing the LCD screen:
9. Use the tweezers to release the display module assembly latch located at the side of the display module

Removing the LCD screen:
10. Lift up the top edge of the display module
11. Carefully thread the display flex cable through the slot in the chassis assembly and lift the display module away from the chassis

Replace the old screen with new and reverse the whole procedure for reassembly

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