Wannien (often associated with Tenma and other rebranders) manufactures budget electronics. Unlike big names like Rigol or Tektronix, service manuals for these units are not typically hosted on public FTP servers or official websites.
: The "101V0" or "94V-0" marking refers to the UL flammability rating of the PCB material, ensuring it meets industrial fire safety standards. Typical Circuit Architecture
Disconnect all power sources before touching the board, especially if it has high-voltage inverter components for a display. wannien 101v0 power supply schematic free
Finding a specific schematic for the (often labeled as E88653 ) can be challenging because it is typically an OEM component used in monitors, industrial equipment, and ATX power supplies. This article provides the technical breakdown and repair guidance you need to navigate this board without a direct factory manual. Technical Overview of the Wannien 101V0
A large, high-voltage electrolytic capacitor (usually rated for 400V or 450V). It smooths the pulsed DC into a flat, high-voltage DC bus (approximately 300V–340V DC in 230V regions, or 160V–170V DC in 110V regions). 3. The Switching (Inverter) Stage Wannien (often associated with Tenma and other rebranders)
A failing MOSFET often sends high voltage backward through its gate, destroying the PWM driver IC. Inspect the IC for physical burn marks or cracks. Symptom 2: Dead Power Supply (Fuse Intact)
Likely caused by failing electrolytic capacitors. Look for swollen or leaking capacitors in the high-frequency inverter area. Technical Overview of the Wannien 101V0 A large,
By comparing the TI reference design to your physical Wannien board, you will realize the schematic is already sitting in front of you.
Spray electronic contact cleaner into the voltage/current adjustment potentiometers and rotate them repeatedly. Inspect filter capacitors for bulging tops. Crucial Safety Precautions
Use the schematic to test for voltage stability across the mainboard connectors.