Let’s compare a low-quality vs. a better service manual approach.

: Selecting between "Peak" and "Average" brightness modes based on the endoscopic image. System Compatibility

: Configuring HDTV imaging, Narrow Band Imaging (NBI), and automatic gain control (AGC).

Genuine Olympus parts are expensive, but third-party equivalents exist for resistors, capacitors, and fans. A good service manual lists not only Olympus part numbers but also generic specifications (e.g., “40mm x 40mm x 10mm, 12V, 0.8W brushless fan”).