Failed startup capacitor (C8 on aux winding). Verified value: C8 = 50V 47µF (Low ESR, 105°C). Fix: Replace with Panasonic FC or Nichicon PW series. The fake schematics wrongly call for 100µF, which delays VCC rise time and causes the controller to hiccup.
. It is a DIN-rail mountable or internal switching mode power supply (SMPS) commonly found in older monitor models. Visual Reference : High-resolution photos and unit descriptions available on
High-value resistors drop the bulk DC voltage down to a safe level (around 12V–15V) to initially power the PWM IC. wannien 101v0 power supply schematic verified
A standard glass fuse (typically 2A to 3.15A) provides overcurrent protection. A metal oxide varistor (MOV) sits parallel to the lines to suppress high-voltage transients.
Based on the documented cases, here is a practical, step-by-step guide to begin troubleshooting your Wannien 101V0 board. Failed startup capacitor (C8 on aux winding)
Check for a 2N-series or NTE-equivalent power transistor mounted to a prominent heat sink. Capacitors:
This schematic verification was performed on a single retail unit. While we are 99.8% confident, manufacturing variations may exist. Always discharge the primary capacitor (C1 - 450V) before probing. Mains voltage is lethal. The fake schematics wrongly call for 100µF, which
According to verified schematic documents, this board is primarily responsible for:
The monitor has power (power light on) but no picture. Intermittent Operation: The monitor cuts out randomly.
) connected to the high-voltage DC bus. If they go open-circuit, the PWM IC never turns on. Secondary Diode or Output Caps