LG D337 - Page 46

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3.2.1.5 Checking RF signal path (FEM)
START
Replace U1100
Check anything
PAM is OK. See next page to check DPX
The Problem may be Logic part
Refer to Logic troubleshoot
Check anything
Check
TP3(R1101),TP4(R1102),
TP5(R1104), TP6(R1105) at U1100.
Is any DC signal detected
at that points?
Yes
Yes
Yes
Yes
No
No
No
No
Check
TP1(C1101) at U1100
check if there is any major dierence referring
To Figure 4.1.1 (b). Is any signal detected at
that point?
Check
TP2 at U1100
check if there is any major diernce referring
To Figure 4.1.1(c). Is any signal detected at
that point?
Is
any signal detected at
that point?