Egsm Transmitter - Samsung SGH-P930 Service Manual

Flow Chart of Troubleshooting and Circuit Diagrams

3-2-2. EGSM Transmitter

Tx ON
(Level : 5)
battery voltage : 3.8V
U802 Check
Pin #3,4 ≥ 30dBm ?
YES
D800 Check
Pin #22 ≥ 30dBm ?
YES
VCO600 Check
Pin #1 ≒ 6dBm ?
YES
U600 Check
Pin#40 ≤ 2.3V ?
YES
THE END
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NO
Check the U802
NO
D800
Resolder or Change
NO
VCO600 Resolder or
change
NO
Check the U600
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