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SGH-P738 Flow Chart of Troubleshooting and Circuit Diagrams
2-
13
13. DCS/PCS Transmitter
CONTINUS TX ON CONDITION
TX POWER DAC : 560 CODE
APPLIED
CH : 698CH(DCS),
660CH(PCS)
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV : 10dBm
ATT : 20dB
Check F601
pin 5,9 :
2.8V ?
U601 pin31 :
about 4~5dbm?
No
Check F601
pin 6 : about
2~3 dbm?
No
Check and
change
U501,U503,
U504
Yes
No
Yes
Check and
change
CN601, C629
Yes
F601
check & change
No
Battery, U101
check & change
Yes
No
U501 check
Yes
No
Yes
No
U501 check
Yes
U601
change or resolder
U600 pin 9, 26
:2.8V ?
No
U101 pin39, C110,
R600
change or resolder
Yes
U600
change or resolder
U601 pin 43,42
:
3.7V ?
U601 pin 45 :
1.2V ?
U601 pin 48
:
about -5dbm?
U601 pin41 :
3V ?
Summary of Contents for SGH-P730C
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Page 31: ...SGH P738 PCB Diagrams 5 0 ...