4. TROUBLE SHOOTING
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Check TP1(L124) at U101
Check if there is any major difference referring
To Figure 4.1.1(b). Is any signal detected at that
point?
Check TP2(L174) at U101
Check if there is any major difference referring
To Figure 4.1.1(c). Is any signal detected at that
point?
Is any signal detected at
that point?
Check TP3(R110),TP4(R111), TP5(R112),
at U101. Is any DC signal detected
at that points?
START
PAM is OK. See next page to check SAW filter
Replace U101
Check L125,C105, L124, SW101
Check C174, L103
The Problem may be Logic part
Refer to Logic troubleshoot
Yes
Yes
Yes
Yes
No
No
No
No
4.3.2.3 Checking RF signal path (PAM)
R110
1K
R111
1K
R112
1K
ANT_SEL0
ANT_SEL1
ANT_SEL2
TP3
TP4
TP5