Working on a cheap Vizio VP422 that has no power.
I have a full set of spare boards, but it appears that I have two bad power supplies. They are Samsung model PS-42.
The one currently in the TV has no blown fuses. The relay cycles when power is applied, but no voltages are present other than the PFC B+. The LED flashes twice repeatedly.
The other PSU has a shorted IC and blown fuse.
Any idea where I might find a schematic for this set, or at least the PSU?
This thing is a nightmare to work on physically... Once the screws for the back cover are removed, the whole case falls apart. The Planar TV's I worked on recently (also built by Samsung) had nice strong frames and normal back covers.
I have a full set of spare boards, but it appears that I have two bad power supplies. They are Samsung model PS-42.
The one currently in the TV has no blown fuses. The relay cycles when power is applied, but no voltages are present other than the PFC B+. The LED flashes twice repeatedly.
The other PSU has a shorted IC and blown fuse.
Any idea where I might find a schematic for this set, or at least the PSU?
This thing is a nightmare to work on physically... Once the screws for the back cover are removed, the whole case falls apart. The Planar TV's I worked on recently (also built by Samsung) had nice strong frames and normal back covers.
Comment