Read LG 42LB7DF (CHASSIS:LJ81A) Service Manual online
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BCM3553
- A Controlled power-up sequence is necessary to establish the two core voltages before the pad voltage is
applied
BCM7412
- Recommends the following power-up sequence: 1.2V -> 2.5V -> 3.3V
- Recommends no more than 5ms between different supplies
All Voltages should regulate at their nominal output voltages no later than 10ms
So, Power-up is Controlled by
Micom
- These 3 voltages should ramp up within 20ms total in any order, no sequence required, supplying
- 1.2V/2.6V/3.3V simultaneously is meet our requirement too.
D3.3V, D1.2V.jpg
Power-Up Sequence
BLOCK DIAGRAM
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