LG H990ds Service Manual page 24

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3. TROUBLE SHOOTING
3.5.3 LTE PART – B1/B2/B3/B4/B5/B8/B12/B17/B20/B26/B28/B39 Tx
Circuit Diagram
TP2(+VPWR_BOOST_BYPASS_RF)
TP1(+VPA0)
U1601
(DC/DC)
TP3(+VPA0)
U1301
(MMPA)
24
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reserved. Only training and service purposes

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