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SGH-Z320i Flow Chart of Troubleshooting and Circuit Diagrams
2-
21
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2-2-2. EGSM Transmitter
YES
YES
YES
YES
Tx ON
(Level : 5)
battery voltage : 3.8V
YES
NO
NO
NO
NO
NO
U800 Check
Pin #22
≥
30dBm ?
PAM600 Check
Pin #11
≥
30dBm ?
RFS800 Check
Pin#3
≥
30dBm?
VCO600 Check
Pin #1
≒
6dBm ?
THE END
Check the RFS800
VCO600 Resolder
VCO600 Resolder or Change or
Check the path of VCO600 &
PAM600
Check the U600
U800 Resolder or Change or
Check the path of U800 & PAM600
U600 Check
Pin#40
≤
2.3V ?