[TechAssist] Re: More help needed -GE JVM140H Range hood Spacemaker 1400 No heat.
- From: gulftech@xxxxxxxx
- To: techassist@xxxxxxxxxxxxx
- Date: Sat, 3 Jul 2004 07:53:32 -0500
Roger,
You said you changed the three microswitches. I think you said the
symptom changed when you did that. I can't help but wonder if I wired it
wrong, or used an N.O. switch in place of an N.C. contact switch. Most
of those microwaves came with a wiring diagram. Sound like you need to
find one.
Good luck.
Ken Smith
Gulf Technical Services
3034 Gulf Breeze Parkway
Gulf Breeze, FL 32563
850-934-8324 (Voice) 850-932-0819 (Fax)
On Sat, 03 Jul 2004 00:20:39 -0400 Roger G <rogerfixit@xxxxxxxxxxx>
writes:
> Hi Pete-
> To answer your questions -
> I am getting Hi voltage when I connect the Xformer to 110v so all
> HiV
> components are OK.
> Filament winding is on main Xformer.
> The front ckt bd has 5 small relays, one medium sized and one large
> one.
> The relays are marked for function - like Vent- On/Off; Light -
> bright;
> light night etc. This is an over the range unit with light and vent.
> One relay (small) is marked Main and this is the one that clicks
> when
> Microwave Start button is pressed.
> All the small relays are the same so I swapped out the Main with
> another -
> no better.
>
> This is what happens -
> Set time cook - hit Start. Unit starts up but no heat.
> If I open the door, fan stops, light comes on BUT timer keeps
> counting
> down !!
> If I close the door, power starts up without having to hit START
> - still
> no heat.
> If the door is open when the time runs out, a relay clicks.
> If the door is closed, beeper beeps and shows END.
>
> As mentioned, timer keeps running down even when door is opened.
> START
> button is also the PAUSE button.
> Tried hitting the Start/Pause button during cycle - relay would
> click and
> timer would stop.
> 99% sure it is NOT a microswitch interlock.
> The coil of the Main relay goes thru some transistors which I figure
> are
> controlled by the microprocessor. The Xistors are marked C815-Y and
> R1005.
> I can swap the R1005 with another on the board but C815 is the only
> one.
> The C815-y crosses to a NTE289A.
> The R1005 crosses to
> NTE Device Number: NTE5404
> SCR-200 VRM,0.8A,TO-92.
>
> Now if the SCR is locking up, wouldn't this keep the relay
> activated??
>
> The only other thing I can figure is that the CPU is not getting the
> signal
> to open the relay and pause the timer when the door is opened.
>
> Thanx for your time
> Roger
> > > Mr. Fix-It
> > > Harrisburg, PA 17110 WebSite- http://mrfixit.netfirms.com
> > > rogerfixit@xxxxxxxx
> > > FAX 510-740-3641; Tel: 717-763-7098 (shop) 717-652-1703(home)
> At 01:03 AM 7/2/2004, you wrote:
>
> >Hi Roger-Can you use a variac and go on the primary of HiV Xfmr?
> Start low
> >and measure HiV tap to see what's what.Are you not getting HiV ?
> can you
> >brief me again on what's going on w/microwave.Is the filament
> supply part
> >of the xfmr? Some GE's like the JVM series I just finished use a
> separate
> >fil. xfmr.Certailly we should be able to dope this
> out...........Regards,
> >Pete
> >Roger G <rogerfixit@xxxxxxxxxxx> wrote:
> >Alignment is good - Ck'd continuity using door itself.
> >Also ck'd high voltage side by putting 110v to transformer.
> >BTW, did not see any secondary high voltage tap from transformer as
> mentioned.
> >Will go over ckt bd with magnifier - sounding more and more like
> micro [?]
> >Roger G.
> >
> >Mr. Fix-It
> >Harrisburg, PA 17110 WebSite- http://mrfixit.netfirms.com
> >rogerfixit@xxxxxxxx
> >FAX 510-740-3641; Tel: 717-763-7098 (shop) 717-652-1703(home)
> >
> >At 10:18 PM 6/29/2004, you wrote:
> >
> > >Did you check the alignment of the switches? Check for bad solder
> on the
> > >control board.
> > >Al Marquardt
> > >Subject: [TechAssist] Re: More help needed -GE JVM140H Range hood
> Spacemaker
> > >1400 No heat.
>
>
> Subbed all micro switches - no better - actually, now acting
> weirdly.
>
>
>
> All ideas appreciated
>
>
> Did check and looked ok but I have it on a table - he uses it
> hanging on
> the wall so it is possible that the door alignment could be off -
> except -
> he said he took it home and tried it on the table without
> hanging it.
> Maybe something happened in transit.
> I usually run these and move the door up and down to assure
> alignment.
> Roger G.
>
> > > >
> >
> > > >
> > > > At 11:09 PM 6/18/2004, you wrote:
> > > >
> > > > >Even though the switches check good how does the alignment
> look?
> > > > >Al Marquardt
> > > > >ampm@xxxxxxx
> > > > >Al Marquardt Electronic Repair
> > > > >206 W Main
> > > > >Girardville Pa. 17935
> > > > >----- Original Message -----
> > > > >From: "Roger G"
> > > > >To:
> > > > >Cc: ;
> > > > >Sent: Friday, June 18, 2004 5:05 PM
> > > > >Subject: [TechAssist] GE JVM140H Range hood Spacemaker 1400
> No heat.
> > > > >
> > > > >
> > > > > > REgarding the comments on the Sharp Microwave on
> TechAssist,
> > > > > > Just did a GE with VERY intermittent heating. Resoldered
> the ckt
> > bd as
> > > > > > suggested.
> > > > > > It worked every time for me - even before I soldered the
> bd- and
> > >always
> > > > >after.
> > > > > > Custy took it home - said it does not work.
> > > > > > I had checked the micro switches-- chk'd OK.
> > > > > > Have you found a similar problem with these GE microwaves?
> > > > > > The connectors looked clean - not like the ones where the
> grease gets
> > >into
> > > > > > them and turns them brown
> > > > > >
> >
> >
> >
> >
>
>
>
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