Wannien 101v0 Power Supply Schematic !!top!! Free Official

Use a multimeter in diode/resistance mode to check for a short circuit between the Drain and Source pins. A shorted MOSFET is the most common cause of a blown fuse.

Most "no power" issues are attributed to dried-out or leaking electrolytic capacitors and blown primary fuses. wannien 101v0 power supply schematic free

This section is safely isolated from the mains voltage via the main switching transformer. It outputs the low-voltage DC required by the device's mainboard and backlight. Use a multimeter in diode/resistance mode to check

Have you managed to find a specific schematic for this unit? Drop a link or your repair story in the comments below to help the next hobbyist! This section is safely isolated from the mains

Check the four pins. You should see a standard diode drop (0.5V to 0.7V) in one direction across the internal diodes, and open loop in reverse. A reading of 0.00V indicates a shorted rectifier.