| LAPTOP POWER SEQUENCE FINAL BY INTERSOT.pdf | | INTERSOFT MOBILE, LAPTOP REPAIRING INSTITUTE 9824144698 (0261) 2424396
INTERSOFT INSTITUTE
HP laptop notebook power leakage BBHP timing
Notebook , timing , BBHP , leakage
Electrical maintenance on the motherboard:
1. the electrical timing"s-P% A8` * a # j: @ - K5 L
When we plugged in Adapter19VIN, the power flows to have a 5VPCU, 3VPCU voltage,
it is by the PU10 (MAX1999) automatically generated, then the machine is in standby
mode.
When we press the Power Button, NBSWON # moment there is a low level, which gave
low 97551,97551 received signal to generate signals DNBSWON #, DNBSWON
distributed to South Bridge, also issued S5-ON 11th pin to 1845 produce 1.5V_S5. S5-
ON input PQ128 PQ132 generated through S5-OND.
S5-OND and PQ141 PQ127 were generated by 5V_S5 and 3V_S5.
3V_S5, 5V_S5, 1.5V_S5 time power to the South Bridge.
South Bridge received DNBSWON low, it occurs SUSB #, SUSC # 2 high sent to 97551,
97551 received SUSB #, SU |
