Remove all power. Measure the resistance from pin #4 (ACDRV) on the charger IC to the gate pins on each of the DCin mosfets (PQ8200, PQ8201, PQ8202). This should be ~4k ohms.
Measure the resistance across the DCin mosfets (PQ8200 PQ8201 - they are in parallel so only one needs to be checked:
source (1-2-3) & drain (5-6-7-8)
source (1-2-3) & gate (4)
gate (4) & drain (5-6-7-8) ; use resistance mode checking not diode mode for these tests
Then repeat for PQ8202.
Post each measurement.
Measure the resistance across the DCin mosfets (PQ8200 PQ8201 - they are in parallel so only one needs to be checked:
source (1-2-3) & drain (5-6-7-8)
source (1-2-3) & gate (4)
gate (4) & drain (5-6-7-8) ; use resistance mode checking not diode mode for these tests
Then repeat for PQ8202.
Post each measurement.
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