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Flow Chart of Troubleshooting
9-14
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9-2-4. EGSM TX
CONTINOUS TX ON CONDITION
TX POWER DAC: 600 CODE APPLIED
CH : 30
RBW : 100KHz
VBW : 100KHz
SPAN : 10MHz
REF LEV. : 10dBm
ATT. : 20dB
①
④
②
⑤
③
Yes
U100
check & change
No
U700 pin 12 :
about 32dBm?
F700
pin 11 : 2.8V ?
No
F700,C700,L700,
CON701,L712,C741
check & change
Yes
U700
pin4, 5: VBAT?
No
BATTERY
check & change
Yes
U700 pin7
about 5dBm ?
No
U700
check & change
U100
check
No
U700
pin 1 : 2.9V ?
Yes
Yes
U701
pin34 : 2.9V?
Pin1,13,22,32
: VBAT ?
No
U100
pin
A13,C110
check or resolder
& BATTERY check
U701
pin21 : 26MHz ?
Vp-p : 1.1V ?
No
OSC700
check or resolder
U701
pin35,36,37,38
100mV ?
No
Yes
Yes
U100
check or resolder
U701
check or resolder
⑥
Yes
②