The LM321MFX/NOPB operational amplifier is widely used for signal conditioning, amplification, and filtering in various electronic applications. However, achieving optimal performance in terms of gain reduction can be challenging without a systematic approach. This article delves into the debugging and optimization techniques that help engineers efficiently reduce gain in LM321MFX/NOPB op-amps. It also covers common issues and best practices for troubleshooting gain reduction problems.