LG KT520 Service Manual page 40

3.1.12 Power On Sequence 3.1.12 Power On Sequence 3.1.12 Power On Sequence
User presses END key and then ONSWAn signal is changed to Low. User presses END key and then ONSWAn signal is changed to Low. User presses END key and then ONSWAn signal is changed to Low.
AB3000 initiates the internal oscillator and powers on the regulators. AB3000 initiates the internal oscillator and powers on the regulators. AB3000 initiates the internal oscillator and powers on the regulators.
AB3000 generates power for DB3150. AB3000 generates power for DB3150. AB3000 generates power for DB3150.
AB3000 releases the power reset signal(PWRRSTn) and generates an interrupt(IRQ0n) to DB3150. AB3000 releases the power reset signal(PWRRSTn) and generates an interrupt(IRQ0n) to DB3150. AB3000 releases the power reset signal(PWRRSTn) and generates an interrupt(IRQ0n) to DB3150.
Press END key
ONSWAn
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Only for training and service purposes
AB3000
PWRRST
IRQ
ONSWA
Figure 3-1-13. Power On Sequence
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3. TECHNICAL BRIEF
DB3150
Power for
DB3150
PWRRSTn
RESPOW_N
IRQ0n
IRQ0_N
LGE Internal Use Only