All error codes By model: T1100T1500T1700T2300T2500T610T730T830T930Z5200Z6Z6200Z9 Model Z5200 Error Code 74:YZ Problem Description Error uploading firmware update file. Corrective Action Options Reboot. Check connections between computer and printer. Try update again. Schedule Service Call ⭢ (301) 340-0000 Email ⭢ Contact Us