It has a small part on it that looks like a glass diode with no black bands. Just a dip in the center. It measures the same from both forward and reverse polarity. It mounts into a cavity hole, located near a heating element on the opposite side of the oven, from the Megnetron, before the 2 screws are tightened. It's not a regular thermal fuse,...it's called a thermistor on the diagram. This is the first oven I have worked on that has a heating element on the one side. I guess that's what they call a convection oven. The fan, and the oven light works OK, but the voltage that drives the high voltage transformer comes from a relay on the control panel. This same voltage also drives the turntable motor, and that voltage is missing.
LLW LeRoy Westlund Westlund TV & Electronics 97 North Main "Where there's a will,... Centerfield, UT 84622-0087 There's always a way." Ph./Fax 435-528-3822 mailto:[EMAIL PROTECTED] -----Original Message----- From: Eugene Spooner <[EMAIL PROTECTED]> To: ELECTRONICS PROFESSIONALS LIST <[EMAIL PROTECTED]> Date: Thursday, June 17, 2004 8:31 PM Subject: Re: [Techs] Sharp Micro-wave oven model R-930AK Won't heat. > Is that bolted down to a metal ? If so , should read zero >ohms ! >Best: Eugene > >LeRoy Westlund wrote: >> >> Hi members, >> This Sharp micro-wave oven won't heat. >> Control panel counts down OK, but has no 115 A/C volts driving the high >> voltage transformer. The Primary interlock relay RY-2 is not activating. >> Also, the turn table does not turn. >> I found a fix in Jeff's Intrepid CD program that said to replace the >> Temperature thermistor part # FH-HZA041WREO. >> I found the thermistor, but it measures 235K ohm across it. Do you think >> that reading is too high ? Shouldn't a good thermistor read much less then >> that ? Does anyone have one they could measure, to confirm that this part is >> bad. I hate to order one, if it won't fix the problem. >> >> TIA, >> LLW >> >> LeRoy Westlund >> Westlund TV & Electronics >> 97 North Main "Where there's a will,... >> Centerfield, UT 84622-0087 There's always a way." >> Ph./Fax 435-528-3822 >> mailto:[EMAIL PROTECTED] >> >> _______________________________________________ >> Tech Repair CD...order your just $49.00 plus shipping...One year of updates free. >> www.intrepid-video.com www.tech-repair.net >> Techs mailing list >> [EMAIL PROTECTED] >> http://intrepid-video.com/mailman/listinfo/techs_intrepid-video.com > >-- >Head Witch Doctor and Chief Bottle Washer >Eugene Spooner , CET , AAS , NP >Eugene's Carry-In TV >1417 Eastway Drive >Charlotte , NC 28205 >mailto:[EMAIL PROTECTED] > >_______________________________________________ >Tech Repair CD...order your just $49.00 plus shipping...One year of updates free. >www.intrepid-video.com www.tech-repair.net >Techs mailing list >[EMAIL PROTECTED] >http://intrepid-video.com/mailman/listinfo/techs_intrepid-video.com > _______________________________________________ Tech Repair CD...order your just $49.00 plus shipping...One year of updates free. www.intrepid-video.com www.tech-repair.net Techs mailing list [EMAIL PROTECTED] http://intrepid-video.com/mailman/listinfo/techs_intrepid-video.com
