LG LH-T550SB Service Manual page 32

DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING
1. SYSTEM 27MHz CLOCK,RESET,FLASH R/W SIGNAL
1) ES6698FD main clock is at 27MHz(X501)
2) ES6698FD 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)
IC501 PIN83)
M_RESET(IC501 PIN 207)
URST(IC501 PIN 188)