LG LM-X120HM Service Manual page 76

3. TROUBLE SHOOTING
3.10 Checking Touch Block
Touch Parts on the main board
Touch control signals are generated by MT6739
Circuit Diagram-Main Board Circuit Diagram-SUB Board
TP1 TP5
TP2
TP3
TP4 TP1 TP2 TP3 TP5
TP4
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