[TechAssist] Re: More help needed -GE JVM140H Range hood Spacemaker 1400 No heat.
- From: "hivolts" <hivolts@xxxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Sat, 3 Jul 2004 10:28:42 -0400
I have also seen the hv diode cause the same thing the ones I have seen the
diode ck's good but was bad and I had no heat
Chuck Staples
Staples TV
Phippsburg Maine 04562
hivotls@xxxxxxxxxxxxxxxx
----- Original Message -----
From: <gulftech@xxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Saturday, July 03, 2004 8:53 AM
Subject: [TechAssist] Re: More help needed -GE JVM140H Range hood Spacemaker
1400 No heat.
> 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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