ALL my 300 and 400 disc Sony CD changers (including this one) have my typical refurbish service which consists of addressing all the key points these need to keep running smoothly. It has a fresh belt set, cleaned laser lens, and a totally disassembled and re-lubricated laser transport tracking assembly. This consists of the gear drive and metal guide rail the laser head rides on. When this is not addressed, it can lead to skipping during playback.
Many a time I find that all the original grease in all these units begins to harden and become more like a tacky, wet glue rather than a slick lubricant. This leads to skipping during playback when not addressed.Also, each unit is disinfected, dusted inside and out, and cleaned ready for installation into your system. It is bubble wrapped and surrounded by packing peanuts for cushioning. Please contact me beforehand to go over any specifics. Thanks for looking and please feel free to scroll through my feedback reviews! Typically I have several comparable units posted for sale so please browse through my other listings!