For securing the power transformer, a transformer base that floats with resin in a cast trunk case common to the higher-end model DCD-S10IIIL is adopted to cut low-frequency noise (image 14). Equipped with AL24 Processing technology and using a Burr-Brown 24-bit DAC (PCM1704), this is a popular model with a focus on sound quality. As this is a later type of DCD-1650SR, it is in good condition with no noticeable scratches. In preparation for listing, the pickup lens, which was still usable, was replaced with a new one including the yoke, and silicone grease was applied to the sliding parts. The tray opening/closing rubber belt, rocker switch, and overcurrent protection element, which are common causes of repeated tray opening/closing, were all replaced with new ones. As there are cases where the DAC on the L channel side of the DCD-1650SR often breaks down due to its own heat generation, heat sinks have been attached to both channel DACs (images 15 ⇒ 16). Incidentally, I checked the back of the board with a magnifying glass for solder cracks. Also, low-viscosity high-grade synthetic oil was applied to the oil-impregnated bearings of each motor output shaft. I confirmed that there are no problems with the output of both channels for analog playback via RCA and digital playback via OPTICAL. The PHONES jack was cleaned of crackling noise. Accessories: * Original power cord * Original remote control RC-281 (batteries not included. No battery leakage.) * Instruction manual (copy) This is a used item of age, so it is not new. Please refrain from considering this item if you are concerned about minor details.