[TechAssist] Re: RCA model # F32683SB, CTC197CE2,dead, relay clicks.

From: Gary McCartney <gary@xxxxxxxxxxx>
To: techassist@xxxxxxxxxxxxx
Date: Thu, 21 Aug 2003 23:19:59 -0400
Sounds like a good unit.

I have the HR Diemen HOT output simulator which is along the same line.
With this unit, you connect the second anode lead of the flyback
directly to the unit, then clip onto the flyback B+ and collector
terminals, plus all the grounds. Then the unit will display a code
telling you what condition the flyback is in and if it is in good
condition, it will display the output in kV on a digital display. If the
flyback is bad, the codes will tell you if it is a shorted primary or
secondary, or whatever. I have saved myself from buying flybacks and
also saved from blowing up HOT's too. I wouldn't want to be without it.
The manufacturer claims it can check flybacks accurately in circuit but
I find I usually have to remove the flyback to avoid false readings.
There is also a test point to connect your scope so you can see the
actual HOT collector waveform the flyback is producing.


http://www.hrdiemen.es/indexeng.shtml





Gary McCartney

McCartney Electronics
Guelph Ontario Canada 
Est. 1984
email: gary (at) number63.ca








J Silverman wrote:
> 
> An instrument made for troubleshooting tv deflection problems without
> blowing up things. Diehl is long out of business but they had lots of
> inventory and I see them frequently offered for sale by people that have a
> bunch of them and by individuals. Takes the place of the HOT and has a test
> mode with trouble lights and a run mode. The tv must have B+ and I dont
> think it will work on the 12 and 24 volt B+ units.
> Every day I will see posts on the list asking questions about deflection
> problems that they could have handled by themselves if they had one of
> these. There were a variety of models. I have the MKV. It cost me $125. I
> bought it when I had a tech that ordered a FBT every time something came in
> with a shorted HOT. After we got it, it showed that only one out of 10 had a
> defective FBT, and was a great help in troubleshooting the source of the
> problem.
> Jerry Silverman
> Greentron Inc
> 4 Newland Ave
> Greenville SC 29609
> 864 232 3889
> Fax 271 2080
> mailto:greentron@xxxxxxx
> ----- Original Message -----
> From: "Kevin" <kevintv@xxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Monday, January 27, 2003 8:48 PM
> Subject: [TechAssist] Re: RCA model # F32683SB, CTC197CE2,dead, relay
> clicks.
> 
> >
> > What is a Diehl MKV Scanner?
> >
> > Kevin Wilks
> > Kevin's TV & Video Repair
> > Penticton BC Canada
> > kevintv@xxxxxxx
> >
> >
> > -----Original Message-----
> > From: techassist-bounce@xxxxxxxxxxxxx
> > [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of J Silverman
> > Sent: Monday, January 27, 2003 5:35 PM
> > To: techassist@xxxxxxxxxxxxx
> > Subject: [TechAssist] Re: RCA model # F32683SB, CTC197CE2,dead, relay
> > clicks.
> >
> >
> > My old Diehl MKV Scanner actually runs the FBT from its own bulletproof
> > HOT
> > if there is B+ and lights tell me if there are problems. Then I can
> > disconnect the loads one at a time and if there is still a problem it
> > has to
> > be the FBT. After the thing is fixed, the Diehl will run the tv
> > indefinitely
> > to see if there are any intermittant problems. I still see those things
> > being offered for sale.
> > Jerry Silverman
> > Greentron Inc
> > 4 Newland Ave
> > Greenville SC 29609
> > 864 232 3889
> > Fax 271 2080
> > mailto:greentron@xxxxxxx
> > ----- Original Message -----
> > From: "Wayne Vanaman" <Wayne@xxxxxxxxxxxxxxxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Monday, January 27, 2003 6:05 PM
> > Subject: [TechAssist] Re: RCA model # F32683SB, CTC197CE2,dead, relay
> > clicks.
> >
> >
> > >
> > > Excellent point Leonard.  An active test is better than a passive
> > test.
> > In
> > > the CTC19x series I have seen many IHVTs that just don't break down
> > untill
> > > you pass a couple hundred volt peaks.  If you have an external power
> > supply,
> > > say 30v + and a drive signal you are good to go.  The Sencore built it
> > stuff
> > > only goes up to about 15vdc and that is not enough to break down the
> > > transformer.
> > >
> > > I have a digital storage o'scope so it is easier for me to see the
> > ringing
> > > on an IHVT however here is how to do it with an analog scope.
> > >
> > > 1.  Set the scope on "Normal Trigger"--not automatic, which most techs
> > use.
> > > 2.  Set the scope on about 20 uS.
> > > 3.  Set the scope to trigger on about 200v. (if you are on the
> > collector
> > of
> > > the output transistor)
> > >     a.  If you can not scope the HOT collector directly use a
> > secondary,
> > > such as the 200v supply
> > >     b.  set the scope to trigger on about 15-20% of the peak pulse you
> > would
> > > expect there.
> > > 4.  Turn the intensity of the trace up.
> > > 5.  Hit the power button while watching the scope.
> > >
> > > What you will see if the IHVT is bad is a series of pulses decaying in
> > > amplitude.
> > >
> > > Wayne Vanaman
> > > Omega Electronics
> > > 6904 W Fairfield Dr
> > > Pensacola, Fl.  32506-3310
> > >
> > > Wayne@xxxxxxxxxxxxxxxxxxxxx
> > > WWW.PensacolaTVRepair.Com
> > >
> > > 850-456-5995 voice
> > > 850-458-6369 fax
> > >
> > >
> > > ----- Original Message -----
> > > From: "Leonard G. Caillouet" <lcaillo@xxxxxxxxxxxx>
> > > To: <techassist@xxxxxxxxxxxxx>
> > > Sent: Monday, January 27, 2003 4:47 PM
> > > Subject: [TechAssist] Re: RCA model # F32683SB, CTC197CE2,dead, relay
> > > clicks.
> > >
> > >
> > > >
> > > > Some flybacks will ring good with these tests and still be bad.  The
> > best
> > > > test that I have found is the Sencore drive test on the TVA92 which
> > is
> > > just
> > > > a 25v horizontal key pulse applied to the primary. You measure the
> > dc
> > > output
> > > > on the anode lead and compare to the chart.  It is very effective at
> > > > identifying HV rectifier problems that ringing will not.
> > > >
> > > > Leonard G. Caillouet
> > > > Service Manager
> > > > Electronics World
> > > > Gainesville, FL
> > > > 352-332-5608
> > > > 352-332-5668 (fax)
> > > >
> > > >
> > > > ----- Original Message -----
> > > > From: "Wayne Vanaman" <Wayne@xxxxxxxxxxxxxxxxxxxxx>
> > > > To: <techassist@xxxxxxxxxxxxx>
> > > > Sent: Monday, January 27, 2003 4:32 PM
> > > > Subject: [TechAssist] Re: RCA model # F32683SB, CTC197CE2,dead,
> > relay
> > > > clicks.
> > > >
> > > >
> > > > >
> > > > > The ringing test is only that, a test.  The information is neither
> > good
> > > > nor
> > > > > bad by itself.  A good/bad test means nothing.  The Sencore VG91,
> > > HA2500,
> > > > > and LC102 will all tell you that the IHVT is good because they
> > have
> > > > > arbitrarily selected 12 or something as the good/bad cut off.  You
> > need
> > > to
> > > > > know what the "new" or "good" ihvts measure.
> > > > >
> > > > > The best test for these is to see them ring would you hit the
> > power
> > > > button.
> > > > >
> > > > > Here are some readings I recorded:
> > > > >
> > > > >
> > > > >
> > > > > IHVT 237506 2 good units measured.
> > > > > Pins 2-3 ring 57, 54 on the z-meter. Measures 2.77, 2.85 mH
> > > > > Pins 1-2 ring 29, 25 and measures 1.49, 1.43 uH
> > > > > Pins 1-3 ring 57, 54 and measures 2.52, 2.64 mH
> > > > > Pins 6-10 ring 48, 41 and measures 530, 540 uH
> > > > > On the TVA
> > > > > Pins 1-3 ring 30, 31
> > > > > Pins 1-2 ring 14, 16
> > > > > Pins 2-3 ring 30, 32
> > > > > Pins 6-10 ring 36, 36
> > > > >
> > > > > Pin 5-anode leaks 2 mA
> > > > >
> > > > > BAD UNITs z-meter
> > > > > pins 2-3 ring 19, 40
> > > > > pins 1-2 ring 2, 17
> > > > > pins 1-3 ring 18, 39
> > > > > pins 6-10 ring 7, 30
> > > > > On the TVA
> > > > > Pins 2-3 ring 15, 27
> > > > > Pins 1-2 ring 0, 11
> > > > > Pins 1-3 ring 14, 26
> > > > > Pins 6-10 ring 0, 26
> > > > >
> > > > >
> > > > > Notice the relatively high (good) ring count on the defective
> > units.
> > > > >
> > > > >
> > > > >
> > > > >
> > > > > Wayne Vanaman
> > > > > Omega Electronics
> > > > > 6904 W Fairfield Dr
> > > > > Pensacola, Fl.  32506-3310
> > > > >
> > > > > Wayne@xxxxxxxxxxxxxxxxxxxxx
> > > > > WWW.PensacolaTVRepair.Com
> > > > >
> > > > > 850-456-5995 voice
> > > > > 850-458-6369 fax
> > > > >
> > > > >
> > > > > ----- Original Message -----
> > > > > From: "Kevin" <kevintv@xxxxxxx>
> > > > > To: <techassist@xxxxxxxxxxxxx>
> > > > > Sent: Monday, January 27, 2003 3:05 PM
> > > > > Subject: [TechAssist] Re: RCA model # F32683SB, CTC197CE2,dead,
> > relay
> > > > > clicks.
> > > > >
> > > > >
> > > > > >
> > > > > > Which pins do I use to ring the flyback?  I have the schematic
> > but I
> > > > > > can't find pin 14 on the flyback.  Pins 2 and 3, and 1 and 3
> > rang
> > > good.
> > > > > > Pins 1 and 2 rang bad.
> > > > > >
> > > > > > Kevin Wilks
> > > > > > Kevin's TV & Video Repair
> > > > > > Penticton BC Canada
> > > > > > kevintv@xxxxxxx
> > > > > >
> > > > > > -----Original Message-----
> > > > > > From: techassist-bounce@xxxxxxxxxxxxx
> > > > > > [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Jim Myers
> > > > > > Sent: Monday, January 27, 2003 4:22 AM
> > > > > > To: techassist@xxxxxxxxxxxxx
> > > > > > Subject: [TechAssist] Re: RCA model # F32683SB, CTC197CE2,dead,
> > relay
> > > > > > clicks.
> > > > > >
> > > > > >
> > > > > > Bad flyback, pull it and ring test it to be sure.
> > > > > > ----- Original Message -----
> > > > > > From: "Kevin" <kevintv@xxxxxxx>
> > > > > > To: "TECH-ASSIST" <techassist@xxxxxxxxxxxxx>
> > > > > > Sent: Monday, January 27, 2003 4:08 AM
> > > > > > Subject: [TechAssist] RCA model # F32683SB, CTC197CE2,dead,
> > relay
> > > > > > clicks.
> > > > > >
> > > > > >
> > > > > > Hi fellow techs,
> > > > > >
> > > > > > Working on this 32" RCA.  When the pwr switch is pressed the
> > just
> > > > > > clicks-no HV or sound.  Only brought in chassis-nojig either.
> > Any
> > > ideas
> > > > > > what could be wrong?  I have never seen this chassis before so
> > any
> > > help
> > > > > > would be appreciated.  TIA
> > > > > >
> > > > > > Kevin Wilks
> > > > > > Kevin's TV & Video Repair
> > > > > > Penticton BC Canada
> > > > > > kevintv@xxxxxxx
> > > > > >
> > > > > >
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