Re: Philips 32PFL5322D/37 power supply repair
From what I can see, this power supply has PFC circuits, and from what it sounds, the primary DC voltage did not switch to higher level when the it is on, if you measure the DC voltage on that large cap 120uf 450v when it is plugged but not being told to tun on, the voltage on that cap should be around 170vdc, when the TV is commanded to turn on ,the voltage is kicked up to about 400vdc. There should be an IC for the PFC controller on the bottom of the board. Notes: next to the large cap above it is a large inductor for the PFC.
From what I can see, this power supply has PFC circuits, and from what it sounds, the primary DC voltage did not switch to higher level when the it is on, if you measure the DC voltage on that large cap 120uf 450v when it is plugged but not being told to tun on, the voltage on that cap should be around 170vdc, when the TV is commanded to turn on ,the voltage is kicked up to about 400vdc. There should be an IC for the PFC controller on the bottom of the board. Notes: next to the large cap above it is a large inductor for the PFC.
Comment