LG EC970W - No 5 V

7. Power Circuit(SMPS)
(4) No 5V
Is about 4.7V put into the
Q155(Q157) Base?
Check the Q156
whether it works normally.
Check or Replace the Q155(Q157).
YES
YES
No 5V.
Is the Q156 Base “H”?
Is 5.3VA put into the Q155(Q157)
collector?
Check the µ-com Control.
YES
YES
NO
NO
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