1050 drive issue

I got a 1050 drive off eBay. The seller said it works sometimes. Usually when first powered up and then fails later. I tried formatting a diskette and get error 174 repeatedly. Are there any utilities I can download to test the drive? I have an SIO2PC-USB I can use to load things. I already used a cleaning diskette on it. I thought the next thing might be to open the case and clean things up. Especially the drive rails. Any other suggestions?

By Keneg, July 3, 2018
114 replies

Sure enough some brief googling found me an NES schematic: https://console5.com/techwiki/images/5/58/NES-001-Schematic---Power,-AV,-RF-Switch.png Shows a full bridge rectifier, with 7805 regulator. So technically, original NES will work with an AC or DC supply. an SNES schematic: https://console5.com/techwiki/images/d/dd/Snes_schematic_color.png shows no bridge rectifier, only some capacitors, a polarity protection diode, and a 7805 - so SNES is DC Only. Hopefully explains some of the