LG F3000 - Page 62

4. TROUBLESHOOTING
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(3) Checking PAM Control Signal
C517
0.01u
R504 0
R505
47p
C520
4.7u
VBAT
20
GND3
14
15
GND4
GND5
16
17
GND6
GND7
18
GND8
19
GND9
GND1
12
GND2
13
TX_RAMP
PA_BAND
PA_EN
Go to Next Stp
Similar?
Yes
No
Download S/W
Check TX_RAMP and PA_EN
Check if there is
Any Major Difference or not
Refer to Graph 4
8
Similar?Similar?
-
TEST POINT
Waveform
Checking Flow
CIRCUIT
Graph 4-8