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Flow Chart of Troubleshooting
9-33
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9-2-12. UMTS1900 Transmitter
**If you check the tx chain,
Check the not only RF Device but also resistor, inductor and capacitor.
Tx ON
RF output : 4408 CH
OUT PWR : 22dBm
YES
NO
F204 Check
Pin #2
≥
22dBm ?
U202 Check
Pin #2
≥
22dBm ?
PAM201 Check
Pin#8
≥
24dBm ?
F204 Resolder or Change
U202 Resolder or Change
THE END
NO
NO
YES
YES
PAM201 Resolder or change
NO
F202 Resolder or change
U104 Resolder or change
YES
YES
NO
F202 check
pin#1
≥
-10dBm ?
U104 check
pin#46
≥
-10dBm