[TechAssist] Re: GE microwave, GSU0421B- sliced keypad ribbon cable

From: Gary McCartney <number63@xxxxxxxxxxxxx>
To: techassist@xxxxxxxxxxxxx
Date: Thu, 07 Feb 2002 20:14:13 -0500
How the heck is jumpering a slit in a ribbon cable a modification? 

Who in the world has ever had a microwave oven inspector come to their
door?

Ok heres one: what if a capacitor with the diode built in is replaced
with a capacitor and external diode (everything rated the same)? 

What about the terrible connections some microwaves had with the one
connector at the magnetron filament? Those manufacturers never put out a
recall on them, and I had one in the shop that had almost caught fire
from that problem. That to me is one big safety problem compared to
jumpering a low voltage ribbon cable.



Gary McCartney

McCartney Electronics
7134 Fife Rd, RR 7
Guelph Ontario Canada N1H 6J4
Fax: (519)821-1530
email: number63@xxxxxxxxxxxxx





HSWAD@xxxxxxx wrote:
> 
> 
>                                                                What I was
> trying to tell you went over your head. Microwaves, as dangerous as they are,
> are watched very carefully by certain agencies. If you modify,( and a sub
> transistor is not a modification )(unless you happen to be a Democrat) then
> you are accepting responsibility if something goes wrong. Modify if you will
> but my suggestion would be to notify the customer, have him sign the slip .
> Just trying to make a suggestion for your own protection. Hollis Bates
>                                    /02 1:32:30 PM Eastern Standard Time,
> number63@xxxxxxxxxxxxx writes:
> 
> << Subj:     [TechAssist] Re: GE microwave, GSU0421B- sliced keypad ribbon
> cable
>  Date:  2/7/02 1:32:30 PM Eastern Standard Time
>  From:  number63@xxxxxxxxxxxxx (Gary McCartney)
>  Sender:    techassist-bounce@xxxxxxxxxxxxx
>  Reply-to:  techassist@xxxxxxxxxxxxx
>  To:    techassist@xxxxxxxxxxxxx
> 
> 
>  Well, I'll tell ya. For all the "illegal" things I've done to electronic
>  equipment, I ought
>  to be in jail for about 1000 years. In this business if you have to
>  worry about every little
>  alteration that is made, you not gonna get any sleep and you'll lose out
>  on a number of jobs
>  because of expense to buy original parts. If what you are saying is
>  true, then I suggest that any time you replace a transistor with an ECG
>  sub, you are also breaking the law for not installing the original part.
>  The ECG might not have the same specs as the original and for heavens
>  sakes could start a fire!!!!
> 
>  My theory is, that as long as you replace parts with same or better
>  specs, even if you have to make alterations, you'll be doing you and
>  your customer a favor. My customers are always very happy when I tell
>  them that they have saved money or even saved there equipment from the
>  scrap yard because of alterations I've made. Maybe where you are from
>  there could be legal problems, but where I'm from, I've never heard of
>  it.
>  Tell me how a jumper on a microwave keypad ribbon cable is gonna cause a
>  safety problem. You might be thinking something like, "well, if the
>  connection comes loose and shorts out to another conductor causing the
>  start button to be activated..." well, BS to that. My job would be neat
>  and that wouldn't have a chance of happening.
> 
> 
> 
>  Some of the things I've done that you wouldn't approve of are:
> 
> 
>  -using a 9V motor in a cassette deck instead of a 12V, and installing my
>  own 7809 voltage regulator to bring the B+ down to 9v to run the motor
> 
>  -taking the top plate off a bad magnetron and installing it on a
>  replacement magnetron because the mounting tabs of the plate onf the
>  replacement were oriented the wrong way.
> 
>  -jumpering 40 traces on a cracked TV main board instead of buying a new
>  board
> 
>  -in a power supply, using two 2200uF capacitors in parallel instead of
>  one 3900uF.
> 
>  - when a multiple winding transformer opened in a stereo receiver power
>  supply, I install three separate transformers in order to make up all
>  the required voltage outputs
> 
>  - plastic button array no longer available on a TV set- solution,
>  install my own bank of push button switches instead
> 
>  -replace picture tubes with numbers that don't anywhere match the
>  original
> 
>  -replace yokes with windings that are different than the original
> 
>  - replace relays with ones that did not match, sometimes have to drill
>  new holes in circuit board to make them fit.
> 
> 
> 
> 
>  Is this enough, or are you having a heart attack by now?
> 
> 
>  Next time, I might be writing you from jail.
> 
> 
> 
>  Gary McCartney
> 
>  McCartney Electronics
>  7134 Fife Rd, RR 7
>  Guelph Ontario Canada N1H 6J4
>  Fax: (519)821-1530
>  email: number63@xxxxxxxxxxxxx
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
>  HSWAD@xxxxxxx wrote:
>  >
>  > All the things you are attempting to do are illegal. Purchase a proper new
>  > part or give it back to your customer.  If you jury rig and it fails you
> are
>  > liable. 45 years experience here. Hollis
>  >
>  >                  In a message dated 2/7/02 11:49:23 AM Eastern Standard
> Time,
>  > number63@xxxxxxxxxxxxx writes:
>  >
>  > << Subj:     [TechAssist] Re: GE microwave, GSU0421B- sliced keypad ribbon
>  > cable
>  >  Date:  2/7/02 11:49:23 AM Eastern Standard Time
>  >  From:  number63@xxxxxxxxxxxxx (Gary McCartney)
>  >  Sender:    techassist-bounce@xxxxxxxxxxxxx
>  >  Reply-to:  techassist@xxxxxxxxxxxxx
>  >  To:    techassist@xxxxxxxxxxxxx
>  >
>  >
>  >  Ya, I think I am pretty well screwed on this one. The conductors are not
>  >  copper. They are some type of painted -on substance. I also can't dig
>  >  them out of the plastic. I've tried scraping and grinding and slicing,
>  >  but can't reveal the conductor. I haven't ripped the keypad away from
>  >  the plastic frame but I'm fairly sure that the ribbon cable and keypad
>  >  are all one piece.
>  >
>  >  Thanks for the reply.
>  >
>  >
>  >  If anyone has some microwave keypads laying around that you are willing
>  >  to part with
>  >
>  >  , I have posted a picture at:
>  >
>  >  http://www.number63.ca/microwave.jpg
>  >
>  >
>  >  I do not anticipate at this point that there is any problem with the
>  >  control panel.
>  >
>  >
>  >
>  >  Gary McCartney
>  >
>  >  McCartney Electronics
>  >  7134 Fife Rd, RR 7
>  >  Guelph Ontario Canada N1H 6J4
>  >  Fax: (519)821-1530
>  >  email: number63@xxxxxxxxxxxxx
>  >
>  >
>  >
>  >
>  >
>  >  J Silverman wrote:
>  >  >
>  >  > If you can expose enough of the traces and if they are copper you may be
>  >  > able to solder a jumper wire across the break. I have done this on
>  > camcorder
>  >  > ribbon cables where there was lots of $ at stake. Sometimes the copper
> is
>  > so
>  >  > thin and narrow it just falls apart in the soldering. I dont believe
> that a
>  >  > paint will work as there is no way to support the ribbon cable.
> Sometimes I
>  >  > just remove the ribbon cable and replace the whole thing with wires. If
> the
>  >  > buttons and ribbon cable are one piece that wont work for you.
>  >  > Jerry Silverman
>  >  > Greentron Inc
>  >  > 4 Newland Ave
>  >  > Greenville SC 29609
>  >  > 864 232 3889
>  >  > Fax 271 2080
>  >  > mailto:greentron@xxxxxxx
>  >  > ----- Original Message -----
>  >  > From: "Gary McCartney" <number63@xxxxxxxxxxxxx>
>  >  > To: <techassist@xxxxxxxxxxxxx>
>  >  > Sent: Wednesday, February 06, 2002 9:14 PM
>  >  > Subject: [TechAssist] Re: GE microwave, GSU0421B- sliced keypad ribbon
>  > cable
>  >  >
>  >  > >
>  >  > > Ken, many of the US 1-800 numbers will work from here. There are some,
>  >  > > however that don't.
>  >  > > I have heard that there is an intermediate number that can be called
> and
>  >  > > the charge is from the caller to the US border only. Not sure if it
>  >  > > works or not.
>  >  > >
>  >  > > This microwave is just a small one so the customer is not likely gonna
>  >  > > want it fixed if I have to order a keypad, so either I have to bridge
>  >  > > the trace in the flexible cable or forget it. I am experimenting with
>  >  > > grinding the plastic with my dremel. May or may not work. Then if I
> get
>  >  > > the trace bare, I'll get some of that rear window defogger repair
>  >  > > compound. I haven't had any luck with the rubber keypad repair kits
> for
>  >  > > remotes.
>  >  > >
>  >  > > Ya, the customer must have got his tools against the flex cable and
>  >  > > split it open because he sure did a winning job at re-installing the
>  >  > > interlock switch. Looked like something Red Green would
> attempt....duct
>  >  > > tape.
>  >  > >
>  >  > >
>  >  > >
>  >  > > Gary McCartney
>  >  > >
>  >  > > McCartney Electronics
>  >  > > 7134 Fife Rd, RR 7
>  >  > > Guelph Ontario Canada N1H 6J4
>  >  > > Fax: (519)821-1530
>  >  > > email: number63@xxxxxxxxxxxxx
>  >  > >
>  >  > >
>  >  > >
>  >  > >
>  >  > > gulftech@xxxxxxxx wrote:
>  >  > > >
>  >  > > > Gary,
>  >  > > >
>  >  > > > Have never had any luck trying to fix a keypad.  What a dork your
>  >  > > > customer is!!!  The keypad peels off of the front panel.  Clean the
>  >  > > > residue well before applying the new one, or it will not be smooth.
>  > Try
>  >  > > > Global--see below.
>  >  > > >
>  >  > > > Ken,
>  >  > > >
>  >  > > > I have worked on microwaves for 10 years.  That's the first time I
> ever
>  >  > > > heard a magnetron referred to as a tube.  Call Global Micro-Parts,
>  >  > > > 1-800-325-8488.  Please start a new post with a new topic.  BTW,
> you'll
>  >  > > > need a number of the magnetron.
>  >  > > >
>  >  > > > Gary--  Please don't laugh.  This is a serious question.  Do U.S.
> 800
>  >  > > > numbers work in Canada?
>  >  > > >
>  >  > > > Ken Smith
>  >  > > > Gulf Technical Services
>  >  > > > 3034 Gulf Breeze Parkway
>  >  > > > Gulf Breeze, FL  32563
>  >  > > > 850-934-8324 (Voice) 850-932-0819 (Fax)
>  >  > > >
>  >  > > > On Wed, 6 Feb 2002 03:48:39 -0800 "Ken Dinckan" <kdinckan@xxxxxxx>
>  >  > > > writes:
>  >  > > > >
>  >  > > > > Hi Gary
>  >  > > > > you can probably try that conductive material they use for the
> worn
>  >  > > > > remote
>  >  > > > > control buttons.. I never tried but it might work just to give you
>  >  > > > > idea..
>  >  > > > > See if it is helps
>  >  > > > > I just had one Emerson Microwave and Tube is gone and called Fox
>  >  > > > > they want $97.80 plus shipping. This Emerson has bad repitation
> for
>  >  > > > > me. So
>  >  > > > > do you have any used tubes laying around??
>  >  > > > >
>  >  > > > > Ken Dinckan
>  >  > > > > ALL Tv&Appliance Service
>  >  > > > > 2747 Roosevelt Street # B
>  >  > > > > Carlsbad CA, 92008
>  >  > > > > tel: (760)434-1131
>  >  > > > > fax: (760)434-8856
>  >  > > > > email to : kdinckan@xxxxxxx
>  >  > > > > ----- Original Message -----
>  >  > > > > From: "Gary McCartney" <number63@xxxxxxxxxxxxx>
>  >  > > > > To: <techassist@xxxxxxxxxxxxx>
>  >  > > > > Sent: Wednesday, February 06, 2002 3:33 PM
>  >  > > > > Subject: [TechAssist] GE microwave, GSU0421B- sliced keypad ribbon
>  >  > > > > cable
>  >  > > > >
>  >  > > > >
>  >  > > > > >
>  >  > > > > > I have this microwave oven which the customer attempted to
> repair
>  >  > > > > > himself. He had duct tape wound around the primary interlock
>  >  > > > > switch and
>  >  > > > > > the switch was busted. After I replaced the switch and checked
> all
>  >  > > > > the
>  >  > > > > > interlock switches, I plugged the oven in and wasn't able to
>  >  > > > > control the
>  >  > > > > > keypad except for the defrost and clear buttons. Then I noticed
>  >  > > > > that 3
>  >  > > > > > traces in the flexable ribbon cable from the keypad to the
> control
>  >  > > > > panel
>  >  > > > > > were sliced. Does anyone have a way of repairing this, other
> than
>  >  > > > > > ordering a new keypad? The traces are sandwiched in plastic and
>  >  > > > > they are
>  >  > > > > > made of that nasty un-solderable conductive material. I tried to
>  >  > > > > scrape
>  >  > > > > > the plastic down to the traces but was not successful. Can the
>  >  > > > > keypad be
>  >  > > > > > removed from the plastic front panel which it seems to be
>  >  > > > > permanently
>  >  > > > > > part of?
>  >  > > > > >
>  >  > > > > > Thanks for any help.
>  >  > > > > > --
>  >  > > > > >
>  >  > > > > >
>  >  > > > > >
>  >  > > > > > Gary McCartney
>  >  > > > > >
>  >  > > > > > McCartney Electronics
>  >  > > > > > 7134 Fife Rd, RR 7
>  >  > > > > > Guelph Ontario Canada N1H 6J4
>  >  > > > > > Fax: (519)821-1530
>  >  > > > > > email: number63@xxxxxxxxxxxxx
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>  --
> 
> 
> 
>  Gary McCartney
> 
>  McCartney Electronics
>  7134 Fife Rd, RR 7
>  Guelph Ontario Canada N1H 6J4
>  Fax: (519)821-1530
>  email: number63@xxxxxxxxxxxxx
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Follow-Ups:
- [TechAssist] Re: GE microwave, GSU0421B- sliced keypad ribbon cable
  - From: Ralph Dorsey
References:
- [TechAssist] Re: GE microwave, GSU0421B- sliced keypad ribbon cable
  - From: HSWAD
[TechAssist] Re: GE microwave, GSU0421B- sliced keypad ribbon cable

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