Wannien 101v0 Power Supply Schematic Verified

The outputs of these two op-amps are tied together via steering diodes. Whichever parameter (voltage or current) hits its limit first pulls down the drive signal, overriding the other and switching the unit between CV and CC modes. 4. Main Output and Series Pass Transistors

) is equal to or lower than the original spec to prevent overheating.

: The board accepts a raw DC input (commonly ranging from 12V to 15V) or acts as the secondary step-down stage from rectified AC mains.

Examine the board for signs of overheating around the four switching transistors. Inspect the electrolytic capacitors for domed or leaking tops, a common issue in vintage or heavily used electronics. wannien 101v0 power supply schematic verified

Look for obvious signs of physical distress. Inspect the secondary electrolytic capacitors for bulging tops or leaking electrolyte. Look for charred resistors, cracked IC casings, or discolored circuit board substrate around the MOSFET and diodes. Step 2: Cold Checks (Unplugged) Set your digital multimeter (DMM) to continuity/diode mode:

Once the circuit begins switching, an auxiliary winding on the main transformer takes over, supplying continuous, efficient power to the IC via a small diode and capacitor. Isolation Transformer and Secondary Rectification

Throughout the layout, arrays of electrolytic and ceramic capacitors operate alongside precision resistors to eliminate high-frequency ripple voltage. These filter networks safeguard the switching transistors and the IC regulator against incoming voltage spikes and electromagnetic interference (EMI). Verified Troubleshooting and Common Point Failures The outputs of these two op-amps are tied

: A defining layout feature of the verified Wannien 101v0 circuit diagram is its four independent transistor switch channels (designated as OUT1 through OUT4 ).

0–5A or 0–10A DC (Depending on the pass transistor configuration)

Continuity and shorts

Utilizes an IC (Integrated Circuit) voltage regulator to step down the input voltage to a stable 5V output.

Technicians who verify these schematics often point to several recurring issues:

Often cross-referenced under part prefixes like E88653 or board assemblies numbered 16-200065-00G . Architectural Breakdown of the Verified Schematic Main Output and Series Pass Transistors ) is

Always discharge the large primary capacitor before touching the board to avoid electric shock. Where to Find Parts

Pre-regulation / heat distribution