Hello i have a panasonic fz-m1d no power on , i don't know if it's bios corrupted , i dont find bios available for try this
Announcement
Collapse
No announcement yet.
panasonic no power on fz-m1d
Collapse
X
-
Re: panasonic no power on fz-m1d
Review the voltages to ground at each coil which are often large and grey in color.
Each coil is linked to a local power supply but it all starts from your ac adapter at ~19v. Search the adapter connector and review 2x dcin mosfets with 8 pins each. These will be controlled by a local battery charger IC which will probably be from Texas instruments (BQ markings on the top surface).
Confirm and share these details.
Comment
-
Re: panasonic no power on fz-m1d
Perfect.
1) See attached for the datasheet for this charger IC.
2) Review figure 16 - your logic board should have a very similar design onboard. Often, as per Piernov's sticky article above, Q2 (aka 2nd DCIN mosfet) gets damaged.
Confirm that you have 2 more black (smaller size) mosfets onboard. They will be 8 pins and with 4 pins on each side.
Post pictures so we can be sure.
Very likely, one of these mosfets is defective and needs to be replaced but we can confirm it through resistance checks. With resistance checks, NO POWER to the logic board.
We need to check the resistance between the mosfet pins:
source (1-2-3) & drain (5-6-7-8)
source (1-2-3) & gate (4)
gate (4) & drain (5-6-7-8)Attached Files
Comment
Comment