LG LHS-36MEC Service Manual page 38

DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING
1. SYSTEM 27MHz CLOCK,RESET,FLASH R/W SIGNAL
1) ES8381 main clock is at 27MHz(X501)
2) ES8381 reset is high active.
FIG 1-1
Power Cord in
FIG 1-2
3-9
3.8V, 27MHz
5.2VA
PWR_CTL(SYSTEM µ-COM)
(IC101 PIN2)
DVD_RESET(IC101 PIN 41)
MRST#(IC501 PIN 251)