Failure To Read T-Flash Card - Blu Dash 4.5 Service Manual

3.11 Failure to read T-flash card

First, change another T flash card, check whether T flash card bad or not
Second, check card connector solder ok or not, if fail, re-solder or change a new one
Third, check TVS reserved or not, check VDD whether normal
Fourth, test related signals, such as MCCK, MCCM0, MCDA0, MCDA1...MCDA3, if
abnormal, check U300, re-hot or change a new one.
T-F Card is not
identified
Change a new
TF-card to test
N
Check T flash
card socket
ok or not?
N
Check TVS
reverse or not?
Y
Check VDD
OK or not?
Y
Check each
signal OK or not?
Y
T-F card is
damaged. Replace
it
N
Re-solder it or
change new one
N
Solder it correct
N
Hot U2 or
change new
one
N
Hot U300
or change
new one