Dcs & Pcs Tx - Samsung SGH-S720i Service Manual

3-2-5. DCS & PCS Tx
Check pin #12 of
PAM100 = 2~5dBm
YES
Check and Change
UCP300
CONTINOUS TX ON
CONDITION
TX POWER DAC: 500 CODE
APPLIED
CH : 30
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV. : 10dBm
ATT. : 20dB
Check and Change
UCP300
YES
Change UCP300
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Check pin #8 of
NO
PAM100 = 2.9V
YES
Check pin #7 of
PAM100 = 3.7V
YES
Check pin #6,4 of
PAM100 = "High"
YES
Check pin #17 of
PAM100 = "Low"
YES
Check pin #8 of
PAM100 = 1.2V
YES
Check pin #1 of
PAM100 = -5dBm
YES
Check and Change
PAM100
Check pin #1,2,3,4 NO
of RFT100 = 1.7V
YES
Check and Change
RFT100
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Flow Chart of Troubleshooting and Circuit Diagrams
NO Check and Change
UCP300
NO check the battery
block
NO Check and Change
UCP300
NO
Check and Change
NO
UCP300
NO
Check pin #18 of
RFT100 = 7~11dBm
NO
YES
Check pin #34,35 of
PAM100 = 26Mhz
YES
Check and Change
RFT100
3-29
NO
Check and Change
OSC100