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SGH-E620 Flow Chart of Troubleshooting
2-
26
2-12. GSM Transmitter
Check F700
pin 10 : about
2~3 dbm?
Check F700
pin 11 :
2.8V ?
Check and
change
CN702
,
C715
Yes
Check and
change
U100
,
U200
No
CONTINUS TX ON CONDITION
TX POWER DAC : 554 CODE
APPLIED
CH : 62ch
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV : 10dBm
ATT : 20dB
U701 pin6 :
about 4~5dbm?
Yes
No
Yes
U701 pin 8,20
:
3.7V ?
F700
check & change
No
Battery,
U100
check & change
Yes
U701 pin 22 :
1.2V ?
No
U100
check
Yes
U701 pin12 :
3V ?
No
U100
check
U700 pin 9 :
2.8V ?
U701
change or resolder
U100
change or resolder
No
Yes
U700
change or resolder
Yes
U701 pin 6 :
about -5dbm?
No
Yes
No
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4
5
6
7
8
1
2
2
3
4
5
6
7
8
Summary of Contents for SGH-E620
Page 7: ...SGH E620 Flow Chart of Troubleshooting 2 4 1 2 2 2 3 4 4 5 ...
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