a friend of mine plugged his Sharp SD-GX2-s 110 volts AC into 220 volts. The small standby transformer blew, 2 other diodes also went bad. I detected and changed the transformer and the diodes. after switching on the power came but quickly the relay cut out with this message on the screen (b4 going off) Er MDRO . subsequent check shows a short zener diode the number on the board is D903. Identifying the part number on the diode is a problem. it reads something like 1N141.48 or 1N1418. I have cross check in a data book but no help. I would be v. glad if someone can help. Thanks
- posted
13 years ago