LG H990ds - Transceiver DC Power Supply Check

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3. TROUBLE SHOOTING
Checking Transceiver 1 DC Power Supply Circuit
3.2 Transceiver DC Power Supply Circuit
Check TP1
+1V0_RF is OK?
START
YES
Check TP2
+1.8V_RF is OK?
YES
Check next step
The Problem may
be Logic part
Refer to Logic
trouble shoot
The Problem may
be Logic part
Refer to Logic
trouble shoot
NO
NO
TP2(1.8V)
TP1(1.0V)
U1400
TOP
TP2(1.8V)
TP1(1.0V)
U1400
(RFIC)
Image Checking Flow
Circuit Diagram
14