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SGH-D410 Flow Chart of Troubleshooting and Circuit Diagrams
2-
2
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2. Initial
3. Sim Part
Check the signal at the
pin 21 of U102 is
"High" when the phone
is boot on
Initial Failure
Check the pin 46,20 and Q103
END
No
Yes
Check the key metrix
of the U601
Yes
Check the key program and
the key pcb
Check the
VCCD,VCC_1.8A
of U601
Check the soldered status of
U601,OSC601
Yes
No
No
Yes
Yes
Check LCD connector CN201 in the main
PBA and the FPCB connector
Yes
Check the vccd of
U601 is around 2.8V
Check the soldered status of
U601,osc601
No
Check the pin 1 of
CN101. voltage 3V ?
Phone can't access SIM card
Check the SIM
connector's (CN101)
connection to SIM
card
Check the circuit related to
U102
Resolder or change CN101
Check the circuit around CN101
input
circuitry
END
No
Yes
Yes
Yes
Yes
No
Check the related circuit of
CN101
No
Check the circuit around U601
output
and vlotage supply circuitry
Yes
Check the related circuit of
U601 and U102
No
