LG KG800 - Page 66

4. TROUBLESHOOTING
- 67 -
(4) Checking PAM Control Signal
C426
VBAT
55
SXENA
59 52
VCC3
1
XBUFF
54
XTUNE
53
PREQ_SEL
PCO2 PCO3
67 68
PCO4
LE
57 64
NC_RX_I+
NC_RX_I-
63
NC_RX_Q+
62
NC_RX_Q-
61
PCO1
65 66
CHIP_EN
60 58
CLK
56
DATA_IN
0.1u
C409
33p
C410
VBAT
C412
3p
22u
C411
S_EN
SYNTH_EN
RF_PWR_DWN
S_CLK
S_DATA
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Similar?
Yes
No
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Check TX_RAMP and PA_EN
Check if there is
Any Major Difference or not
Refer to Graph 4
7
Go to Next Step
Similar?
Yes
No
Download S/W
Go to Next Step
Similar?
Yes
Download S/WDownload S/W
Check if there is
Any Major Difference or not
Refer to Graph 4
-
TEST POINT
Waveform
Checking Flow
CIRCUIT
Graph 4-7