killed 3 fones with re 7500

[farry]

hi
i tried to change a ribbon socket,and cherger connector on 3 different types of samsubg,after succesfuul change,none of them are turning on,i covered the bottom of the board with the foil which was supplied ,fast reflow upper and lower heater ,190 deg, what am i doing wrong?please write your experience here.

br

farry

[balu_dark]

try to clean all with methanol - remove flux from board. also if CPU under composite glue - phone phone can be damaged during work with it

[Raheeeeb]

There are diffrence between deal with sockets mounted in the bottom or the top pcb and others in the middle or srounding with some compontents specailly if these were glued or underfilled.

for this you should do the following steps

1-should strictly cover all glued component around the desired part
with reflective tape

2-should apply extra solder to sockets pins on board becasue during remove the damged part some of the solder been taken with the socket legs

3-should use good flux to let the solder well melt with the new socket

4-should not start cooling after you turn the upper heater directly but you can somthly assure the jionts by a gentle touch from the tweezer to the socket .

thanks

Raheeeeb

[farry]

hello

i covered all of the bottom pcb with reflective tape,but i didnt cover the top board,it was samsung d500,i also checked the socket under the microscope,all seems ok,so is it ok to cover all the componnents at the bottom and at top? ru saying when in park mode, do not turn the cooling fan on?is it generally safe then if u dont exceed 180 deg,as long as glued,or most componnents r covered,thnx for the tips rahheb and balu dark.

br

farry

[tornadoinfra]

Originally Posted by farry

hi
i tried to change a ribbon socket,and cherger connector on 3 different types of samsubg,after succesfuul change,none of them are turning on,i covered the bottom of the board with the foil which was supplied ,fast reflow upper and lower heater ,190 deg, what am i doing wrong?please write your experience here.

br

farry

hi
sir with due respect sir this device re7500 is tecnical tools
to operate any enginnering tools a certain aspect skill and experince is
required for example u must be skilled tecnician have 2 or 3 years
experince in hardware to operate a infra rework station
but killing some phones can also be good because u can gain experince
first mobile phone i repair was erricon 337 back in 1997
the cost of this mobile was 1000 usd
we could recover money with this experince
i hope u understand
regards
tornadoinfra

[baomobile]

Originally Posted by tornadoinfra

hi
sir with due respect sir this device re7500 is tecnical tools
to operate any enginnering tools a certain aspect skill and experince is
required for example u must be skilled tecnician have 2 or 3 years
experince in hardware to operate a infra rework station
but killing some phones can also be good because u can gain experince
first mobile phone i repair was erricon 337 back in 1997
the cost of this mobile was 1000 usd
we could recover money with this experince
i hope u understand
regards
tornadoinfra

Nice words.They must unsdertand about that for sure.