[TechAssist] Re: Sharp Micro-wave oven - model R-930AK Won't heat
- From: "becyn" <becyn@xxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Fri, 18 Jun 2004 12:06:03 -0400
Leroy,
I took a look at the sheet for this one. It is possible for the mag fan to
run independently on this model. If you have no power to the the HV
transformer primary, then the path to consider is the contacts of Ry1 and
the primry interlock relay RY2 which is controlled by a door sensing switch.
The door sensor is at the top of the stack. I have also seen burned sec
interlock switches at the bottom. Sometimes they are defective but test OK
out of cicuit.
It's rare that the contoller will be the problem but possible.
Jim McVey
McVey Alltronix
327 Broadway
Newburgh Ny 12550
ph: 845 561 8383
fx: 845 561 9017
Consumer electronics &
computer service.
Factory authorized for
over twenty brands.
----- Original Message -----
From: "LeRoy Westlund" <llw@xxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Thursday, June 17, 2004 9:14 PM
Subject: [TechAssist] Re: Sharp Micro-wave oven - model R-930AK Won't heat
> The fan runs normal.
> All 3 of the door switches check good.
> Maybe the relay is bad.
> I'll pull the control board and check for bad connections on the printed
> ckt.
>
> 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:LLW@xxxxxxxxxx
>
> -----Original Message-----
> From: becyn <becyn@xxxxxxxxxx>
> To: techassist@xxxxxxxxxxxxx <techassist@xxxxxxxxxxxxx>
> Date: Thursday, June 17, 2004 5:38 PM
> Subject: [TechAssist] Re: Sharp Micro-wave oven - model R-930AK Won't heat
>
>
> >wow! so much for tips! The thermister is for the the convection mode. It
> has
> >nothing to do with the microwave function!
> >You probably have a bad lockout microswitch
> >if the mag fan doesn't run.
> >
> >Jim McVey
> >McVey Alltronix
> >327 Broadway
> >Newburgh Ny 12550
> >ph: 845 561 8383
> >fx: 845 561 9017
> >Consumer electronics &
> >computer service.
> >Factory authorized for
> >over twenty brands.
> >
> >
> >----- Original Message -----
> >From: "LeRoy Westlund" <llw@xxxxxxxxxx>
> >To: "TechAssist" <techassist@xxxxxxxxxxxxx>
> >Sent: Thursday, June 17, 2004 6:53 PM
> >Subject: [TechAssist] Sharp Micro-wave oven - model R-930AK Won't heat
> >
> >
> >> 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:LLW@xxxxxxxxxx
> >>
> >>
> >>
>
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