E700 Ribbon change step by step with pictures

[Yoda_Brno]

AT FIRST THANK YOU ALL FOR THIS GREAT FORUM

Samsung SGH-E700 Ribbon change, step by step with pictures
You will need>

1. Faulty E700

2. TORX 6 srewdriver, crosswise screwdriver, simcard ), shorted dental probe, tweezers, hooked tweezers,
good soldering FLUX (RMA 40-HV), 0.5mm soldering wire, isoprophyl alcohol, solder,
hot air solder, new ribbon, non shaking hands (FIG 1)

3. Prepare phone, unscrew 4 srcrews on back side of phone (FIG 2)

4. using SIM card carefully unlock phone cover (FIG 3)
Disassembly back cover by pressung cover DOWN. (FIG 4)

5. Unplug FLEX from PWB using hooked tweezers (FIG 5)
covering flat strip using tweezers (FIG 6)

6. Dissassembly upper cover using shorted dental probe (FIG 7, FIG 8)

7. Now u have dissasembled bottom and upper cover (FIG 9)

8. using crosswise scredriver unscrew 2 screws in bottom size of upper cover (FIG 10)

9. using SIM card disassembly upper cover (FIG 11) Unlock cover at camera side (FIG 12)
disassembly cover by pulling upper cover (FIG 13)

10. Now u have disassembled upper cover (FIG 14)

11. Using hooked tweezers remove camera flex (FIG 15) and earpiece and vibra (FIG 16)

12. Now you have ribbon with LCD`s prepared to work (FIG 17)

13. With twezers remove glue from earpiece and vibra soldering joints and desolder it (u can also cut it
but don`t forget that wires will be shorter)

14. Desolder flat wire for bigger LCD leds (FIG 18)

15. Remove covering rubber near smaller LCD using sharp scalpel (FIG 19)

16. pull up smaller LCD very carefully using hooked tweezers (FIG 20)

17. be sure that all covering adhesive rubber is on right place (FIG 21)

18. Now u will have to cut off covering adhesive film (FIG 22, FIG 23) Be very carefull.
you must not cut off small LCD soldering joints.

19. Carefully remove bigger LCD (its only glued) (FIG 24) Replace rubber to the new ribbon (FIG 25)

20. Unglue smaller lcd until u can see soldering joints. (FIG 26)

21. Now u can start with desoldering. Put flux to soldering joints (FIG 27) a desloder with hot air
moving hot air jet from left side to right slow, approx 4 cm above soldering joints and carefully remove it.

22. The same procedure apply to bigger LCD.

23. Now u have desoldered internal and External LCD (FIG 28)

24. Now u have to prepare new ribbon. put soldering flux to all soldering
joints you will need.
(LCD`s joints, internal LCD LED, earpiece, vibra) (FIG 29) and prepare them with soldering wire
and clean ribbon VERY well using isoprophyl alcohol (FIG 30)

25. Now u can start with soldering LCD`s to new ribbon. As first solder Internal LCD using FLUX >
use non shorted dental probe to pressing LCD flex cable to ribbon and solder it using hot air
approx. 4 cm above soldering joints, moving hot air jet from left side to right slow (FIG 31)
and clean it well.

26. Small lcd solder using iron, no hot air solder. Fit it well, glue over flex will help you. Solder it and
clean it well. (FIG 32)

27. Put back covering adhesive film (FIG 33)

28. Put the LCD`s right positions, Solder back internal LCD led flex and clean it well (FIG 34)

29. Solder back earpiece and vibra, beware of polarity. Clean it well.

30. Now u have used LCD`s with new ribbon, clean LCD`s well and
assembly the phone.
(FIG 35)

39. Pray that you did not a mistake, and power up the phone.
(FIG 36, FIG 37)

ENJOY

BEST REGARDS YODA

PS> download attachment, it contains URL where u will find step_by_step pictures

[debeliamark]

There a main question is still without decision - how to get 100% working flat cables - at me in best case 2 from every 5 isn't good - or totaly scrab, or some part need to be replaced/resoldered - this make operation crazy, because soldering/desoldering LCD-s many times is not so good...

[Yoda_Brno]

:O) ihaven`t no problem with flex cables.. No problem. I have supplier who have flex with parts, i have change only LCDs...

[Spalato]

Originally Posted by Yoda_Brno

:O) ihaven`t no problem with flex cables.. No problem. I have supplier who have flex with parts, i have change only LCDs...

can you mail me where you get the flex's with all parts... our suppliers here are a little slow and have only blank flex's...

oliver

[debeliamark]

There is not so important to have all parts over cable, but to have RIGHT values and to not change it from original one - in some cases is better to have blank cable ( these was first working E700 cables in Bulgaria spare parts market - provided by Admiral ) but working - without shorts beween layers or damaged pads ...

[Yoda_Brno]

I have also blank ribbon and i tried to put parts from original ribbon to blank but w/o succes.. (

[HEADMASTER]

Debliamark is right
most of flat cable with component are bad
I changed about 100 A800 and 30 E700 with blank flat cable and all is ok without problems.
All what u need is how to. Nothing magic .
I have all samsung flat cable and all is good part. Not for sale its only for my repair center.

[ebmaster]

Can you let me know where to buy the parts ?

[Pandemonio100]

The problem is only one where to buy 100000% original flat cable and working?
I have used 5/10pcs and only one work and i can assure you that isn't a pleasure lost time to change flat.

[crusher]

yeahh argh Im mad...

soldered int+ext lcd to a blank cable, together with parts, and after noticed that due to bad components, the backlight does not work, the oscillator chip heats like hell instead...

gotta buy complete lcds..

[Yoda_Brno]

For me Blank cable does not work anyway.. i wroted that blank cable does not work.. Cable with parts is OK.

[TREAGO]

This Is Excellent! I Wish I Saw This Before Replacing My Screen,but Can You Tell Me How To Repair My Camera Cable As I Cant Get Any Pics

[Yoda_Brno]

If No light after change ribbon....

[eko]

Changed a couple of flat cables for E700, the small screen stopped working and the camera displays is blurred

[Burnt Cobba]

origial cable is the only sensible solution.

China stuff is just for a couple of months (as usual). Quality is gone in China stuff. Made in China = Forget quality since it is cheap.


al