Samsung SGH-S720i, Руководство по обслуживанию

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Flow Chart of Troubleshooting and Circuit Diagrams
3-28
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3-2-4. EGSM Tx
Check pin #12 of
PAM100 = 2~5dBm
Check and Change
UCP300
Check pin #8 of P
AM100 = 2.9V
Check pin #7 of
PAM100 = 3.7V
Check pin #6 of
PAM100 = "High"
Check pin #17,4 of
PAM100 = "Low"
Check pin #8 of P
AM100 = 1.2V
Check pin #11 of
PAM100 = -5dBm
Check and Change
PAM100
Check pin #15 of R
FT100 = 7~11dBm
Check and Change
UCP300
Check pin #1,2,3,4
of RFT100 = 1.7V
Check pin #34,35
of RFT100=26Mhz
Check and Change
OSC100
Check and Change
RFT100
Check and Change
RFT100
Change UCP300
Check the battery
block
Check and Change
UCP300
Check and Change
UCP300
Check and Change
UCP300,C101
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO NO
NO
NO
NO
NO
NO
NO
NO
CONTINOUS TX ON
CONDITION
TX POWER DAC: 500 CODE
APPLIED
CH : 30
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV. : 10dBm
ATT. : 20dB