The brain of the operation is usually a PWM (Pulse Width Modulation) Controller IC on the primary side (e.g., a Sony custom chip or a standard industrial controller).
The schematic told me exactly what rating the replacement part needed to be. A few days later, a replacement part arrived in the mail. I carefully soldered the new MOSFET in place, cleaned the board, and reassembled the unit. Adp-160er Schematic
: A detailed one-page schematic diagram created with EAGLE is available on Scribd . The brain of the operation is usually a
On the primary side, the optocoupler’s phototransistor conducts more current, pulling the FB pin of the PWM controller low. The PWM responds by reducing the duty cycle (shortening the on-time of the MOSFET), which lowers the output voltage back to 20V. I carefully soldered the new MOSFET in place,
: A well-known repository for technicians. While it often lists the "CR" model, the architecture is very similar to the "ER," and it provides essential circuit diagrams and service manuals. Visual Guides and Technical Analysis For a more "blog-style" breakdown that explains the board works rather than just showing the lines: All About Circuits Forum