Samsung SGH-U900 Service Manual page 62

10-2-2. DCS1800 RX
NORMAL CONDITION
catch the channel?
YES
PAM100 CHECK
pin#8 ≥ -65dBm ?
YES
PAM100 CHECK
pin#5 ≥ -65dBm ?
YES
F101 CHECK?
YES
TCXO CLOCK CHECK?
19.2MHz @ C231
YES
U200 Check?
YES
UCP300 CHECK!!
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NO
CHECK
ANT contact ?
NO
PAM100, RFS100
re-solder or change
NO
PAM100
re-solder or change
NO
F101
re-solder or change
NO
TCX200, C231
re-solder or change
NO
U200
change or re-solder
10-20
Flow Chart of Troubleshooting
Band : DCS
CELL POWER : -50dBm
Channel : 698Ch