Samsung SGH-X105 Service Manual page 13

3. Sim Part
" Insert SIM " is displayed on the LC D
Is there any Signals
pin#52, #53, #54 of U100?
Is there any Signals
pin#1, #2, #3, #4 of C N100?
C heck the SIMC ard
Y es
Y es
Y es
END
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SG H- X105 F low Chart of Troubleshooting
No
No
4- 3
C heck the U301
C heck the U100