Re: Acer A315-55G / DA0ZAWMB8E0 not charging
Hi.
1) Do you have a stable REGN (+6 volts) on your charger IC @ PU1 ?
2) Any corrosion on this board and area of the logic board ?
3) Confirm the current sense parts and traces are reaching the charger IC ok.
4) For the brief 1-2 seconds where ACOK is pulled high -> what voltage is present @ B+ ?
5) Remove all power and review the resistance across each mosfet pin to confirm the mosfet is not defective.
Each mosfet linked to this charger IC should be reviewed.
With no power, meter in resistance mode, check:
source (1-2-3) & drain (5-6-7-8)
source (1-2-3) & gate (4)
gate (4) & drain (5-6-7-8)
Post the readings for:
PQ1 (ACFET)
PQ9054 (RBFET)
PQ30 (HIGH SIDE battery charge FET)
PQ29 (LOW SIDE battery charge FET)
PQ2 (Battery FET)
Hi.
1) Do you have a stable REGN (+6 volts) on your charger IC @ PU1 ?
2) Any corrosion on this board and area of the logic board ?
3) Confirm the current sense parts and traces are reaching the charger IC ok.
4) For the brief 1-2 seconds where ACOK is pulled high -> what voltage is present @ B+ ?
5) Remove all power and review the resistance across each mosfet pin to confirm the mosfet is not defective.
Each mosfet linked to this charger IC should be reviewed.
With no power, meter in resistance mode, check:
source (1-2-3) & drain (5-6-7-8)
source (1-2-3) & gate (4)
gate (4) & drain (5-6-7-8)
Post the readings for:
PQ1 (ACFET)
PQ9054 (RBFET)
PQ30 (HIGH SIDE battery charge FET)
PQ29 (LOW SIDE battery charge FET)
PQ2 (Battery FET)
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