LG LFC20770SB Service Manual page 84

3) TPA's removing.
1. How to remove Terminal Position Assurance (TPA)
<AC TPA>
Lift snap (Right)
Press hook (Left)
<DC TPA>
Press Hook (Right)
? After measure the values, you MUST put in the TPA again.
Press hook (Right)
Press Hook (Left)
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Lift snap (Left)
Lift T.P.A.