Egsm Tx - Samsung SGH-Z650i Service Manual

9-2-4. EGSM TX

Tx ON
(Level : 5)
battery voltage : 3.8V
U600 Check
Pin#40 ≤ 2.3V ?
YES
VCO600 Check
Pin #1 ≒ 6dBm ?
YES
PAM700 Check
Pin #12 ≥ 30dBm ?
YES
DUF800 Check
Pin #6 ≥ 30dBm ?
YES
RFS800 Check
Pin#3 ≥ 30dBm?
YES
THE END
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NO
Check the U600
NO
VCO600 Resolder
NO
Check the path of VCO600 &
NO
Resolder DUF800 or Change or
Check the path of DUF800 &
NO
Check the RFS800
9-23
Flow Chart of Troubleshooting
Change or
PAM700
PAM700