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Flow Chart of Troubleshooting
10-30
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10-2-7. UMTS2100 Receiver
RX ON
RF Input : 10700CH
Cell Power : -40dBm
Check pin #8 of
PAM100
≥
-45dBm
Check pin #3 of
DUP200
≥
-50dBm
Check pin #26 of
U200
≥
-50dBm
Check the pin #7 of
U201 = 19.2MHz
Check the pin #10,11,12,13
of
U201 Vp-p=160mV
END
Resolder or Change
RFS100, L102, C100
Resolder or Change
PAM100
Check soldered status of
DUP200
Resolder or change
L206, C252, C253
Resolder or Change TCXO100
Resolder or Change U200
Normal Condition Catch the
channel
Check pin #10 of
PAM100
≥
-50dBm
UMTS Receiver is O.K?
UMTS RX path component
resolder or change
Check soldered status of
ANT, C102, C101, L101
YES
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
NO
Check PAM100
pin #28 : Low
pin #1, 27 : High ?
NO
YES
Resolder or change UCP300
Summary of Contents for SGH-L170
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