[TechAssist] Re: More help needed -GE JVM140H Range hood Spacemaker 1400 No heat.
- From: "Phillip R. Hull" <phil245@xxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Sun, 4 Jul 2004 10:59:27 -0400
Look for bad solder connections on control panel.
Phillip R. Hull STET
phil245@xxxxxxxxxxxxx
FAX 517-569-2242
----- Original Message -----
From: "Roger G" <rogerfixit@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Saturday, July 03, 2004 4:03 PM
Subject: [TechAssist] Re: More help needed -GE JVM140H Range hood Spacemaker
1400 No heat.
> Thanx for the replies but-
> If the diode were bad, I would not get Microwave energy when powering the
> transformer with 110v as evidenced by test light (fluorescent tube)
glowing.
> Plus with the timer continuing to run when the door is opened - something
> else is going on.
>
> The microswitches have molded connectors and only go on one way. The
> symptoms remained the same unfortunately.
>
> At 10:28 AM 7/3/2004, you wrote:
>
> >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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> 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)
>
>
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