[TechAssist] Re: Wards /Zenith 9-1407 TV Model MWM2553Y
- From: "George" <grndmstrg@xxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Sun, 14 Mar 2004 00:32:32 -0800
Hold the phone!!!! LM7909 is a negative voltage regulator (-9v) while 7808
is a positive (+8v) regulator. You might try a 7908 for testing.
George
Afana Electronics
Moreno Valley, CA
----- Original Message -----
From: "Technotronic Dimensions" <steve@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Saturday, March 13, 2004 8:13 PM
Subject: [TechAssist] Re: Wards /Zenith 9-1407 TV Model MWM2553Y
> Making Progress....I think?
>
> I resoldered the Flyback just for the Heck of it. Then I went
> in and was gonna resolder that V.Reg IC with the Heat Sink on it which was
> Overheating on the Main board. I think its IC4121. It just came apart when
I
> touched it - the leeds just broke near the Case. Its an LM7909 , and I had
a
> 7808 Laying around here, so I threw that in with a bigger heat sink
salvaged
> from an Old Monitor Chassis.
>
>
> Fired it up with the regular heaters, and I must say the
> Picture is looking better. Its less Grainy, but I still have too much red.
> Its Just enough to prevent the color WHITE from being produced in the mix.
I
> shut down, then redid the Wrap on the FBT as Promised. This Time I
measured
> the Original Heater was 4.2VAC , and I made enough turns duplicating
around
> 3.9-4VAC on the FBT Core gimmick. When I Powered using that, I dont really
> see much a Difference. The Red is still prominent, and reducing the POT
does
> not eliminate it totally. Could I have an unsalvagable CRT? Or could a
Spark
> Gap or other Component on the CRT PCB cause this? Maybe a bad CRT Socket?
>
> Also, could perhaps that V.REG IC have damaged other items on the Main
> Board Like an IC relating to color? Or Could I have a Bad Cap on that
> causing the problem? The IC does
> not get as hot with the New Heat Sink, but still quite hot & did not
> measure the Voltages
> on it. Everything looks fine, Except there is no White....its pink, even
the
> Snow.
>
> Willie Hunter Sent me a Print of the CRT PCB - but do not have the Chassis
> Print, nor do I think its in the archives.
>
>
> PS: If it is the CRT, is there a way to "ZAP" that Red Gun somehow to try
to
> eliminate the Dirt or Junk From it? I rarely get into CRT problems too
much,
> so am not sure if junk on a Gun causes that Color to be more prominent? I
> read somewhere along time ago, someone took a 1 Ohm Resistor, and jumped I
> think it to G2 and the suspected Gun some way or another, and was able to
> clear a fault....? The Resistor Opens up , but not before some extra juice
> was able to dislodge the Debris...at least thats how I remember it.
>
>
> Steve Hearns
> Technotronic Dimensions, NY [USA]
> WWW.TECHNOTRONIC-DIMENSIONS.COM
> 1-877-817-9885 (Voice / Fax Toll Free - US Only)
>
>
>
>
> ----- Original Message -----
> From: "Intrepid Video Support" <support@xxxxxxxxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Saturday, March 13, 2004 9:43 AM
> Subject: [TechAssist] Re: Wards /Zenith 9-1407 TV Model MWM2553Y
>
>
> Steve,
> Try different number of wraps around the fly to achieve the proper
voltage.
>
> Jeff Dougherty
> Intrepid Video TV/VCR
> 263 S Front St
> Steelton PA 17113
> fax...717-564-4952
> www.intrepid-video.com www.tech-repair.net
>
> ----- Original Message -----
> From: "Technotronic Dimensions" <steve@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Friday, March 12, 2004 10:51 PM
> Subject: [TechAssist] Re: Wards /Zenith 9-1407 TV Model MWM2553Y
>
>
> Hi Willie:
>
> Yes, I had done that before , and still had a problem with
the
> Pix.....although a different one. What threw me off was when I hooked the
> normal Heaters back up, and measured the Voltage on my 4-5 Turns of Wire
on
> the FBt core, I had lost it....it was less than 1VAC. Thats when I started
> doubting the Flyback. I guess I will Rewind it again, and measure it. It
was
> awfully strange.
>
> Steve Hearns
> Technotronic Dimensions, NY [USA]
> WWW.TECHNOTRONIC-DIMENSIONS.COM
> 1-877-817-9885 (Voice / Fax Toll Free - US Only)
>
> ----- Original Message -----
> From: "Willie Hunter" <williehunter2@xxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Friday, March 12, 2004 9:29 PM
> Subject: [TechAssist] Re: Wards /Zenith 9-1407 TV Model MWM2553Y
>
>
> Nothing is wrong with the G2 Voltage.what you have is a bad tube.Isolating
> the heaters from
> the circuit and put about 3 or 4 of wire around the flyback core will act
as
> a booster.
> but the filament has to be totally disconnected from the rest of the
> circuit.
> Willie.
> Hunter tv
>
>
> >From: "Technotronic Dimensions" <steve@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
> >Reply-To: techassist@xxxxxxxxxxxxx
> >To: <techassist@xxxxxxxxxxxxx>
> >Subject: [TechAssist] Re: Wards /Zenith 9-1407 TV Model MWM2553Y
> >Date: Fri, 12 Mar 2004 21:12:45 -0500
> >
> >Hi Bob:
> >
> > Thanks for the Tip. I now believe the FBT is for the Most
> >part OK. the Focus becomes sort of "tight" near the final 80-90% of the
> >Rotation of the Control when turning it, but have seen this before on
other
> >Sets, so I think its ok. The Screen seems sort of Weak, as it too needs
to
> >be near 80-90% of Maximum for it to have a Decent level, but for the most
> >part Acceptable.....unless this is a 'weak' flyback? Would not too the HV
> >be
> >lower than usual, and could that explain why I have NO white at all? I
have
> >no HV Proba (yet) , and I posted in another message my G2 I believe is
> >394VDC....its the Grey Wire from the Flyback, not the Red Focus wire. I
> >dont
> >do too many Repairs on sets which require extensive Voltage measurements,
> >so
> >excuse me if my references are not correct. I think the Grey is the G2
but
> >not sure.
> >
> >
> >Regards,
> >
> >Steve Hearns
> >Technotronic Dimensions, NY [USA]
> >WWW.TECHNOTRONIC-DIMENSIONS.COM
> >1-877-817-9885 (Voice / Fax Toll Free - US Only)
> >
> >
> >----- Original Message -----
> >From: "Bob@Bobs tv" <woodman1@xxxxxxxx>
> >To: <techassist@xxxxxxxxxxxxx>
> >Sent: Friday, March 12, 2004 1:41 PM
> >Subject: [TechAssist] Re: Wards /Zenith 9-1407 TV Model MWM2553Y
> >
> >
> >Steve,
> > There are three pots on the CRT board R-B-G..That module was
used
> >on Zenith's L-M line along with the A63/A68 picture tubes that
> >failed...Another point a bad tube or spark gap in CRT socket can cause
the
> >focus/screen controls to fail on the HOT..
> >Bob,
> >
> >Bobs TV Worcester, ma
> >
> >woodman1@xxxxxxxx
> >
> >Main 508-853-1482
> >Fax 508-853-1480
> >----- Original Message -----
> >From: "Technotronic Dimensions" <steve@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
> >To: <techassist@xxxxxxxxxxxxx>
> >Sent: Thursday, March 11, 2004 10:24 PM
> >Subject: [TechAssist] Re: Wards /Zenith 9-1407 TV Model MWM2553Y
> >
> >
> > > Willie:
> > >
> > > I didnt see an option for RED or any color for that matter
in
> >the
> > > menu. I did notice that none of the color controls (IE :TINT) in the
> >menu
> > > change the color at all - but the sliders move when you actuate them.
> >Same
> > > for Brightness.
> > >
> > > I rehooked up the Tap from the FBT to the heaters ust to
> >compare,
> > > and I had a sort of loud hissing noise like HV escaping somewhere near
> >the
> > > neck. The Pix looked more out of Focus, so I reattached the normal
> >heaters
> >,
> > > but now my Tap which was putting out like 4.5V, now is putting out
less
> >than
> > > 1 VAC. Could the Flyback have weakened during my test ? I notice Now
the
> > > Focus Pot has to be near all the way CW to get decent Focus, and so
does
> >the
> > > Screen Control in order to get a fair Brightness. Flyback is a
95-4372.
> > >
> > > Steve Hearns
> > > Technotronic Dimensions, NY [USA]
> > > WWW.TECHNOTRONIC-DIMENSIONS.COM
> > > 1-877-817-9885 (Voice / Fax Toll Free - US Only)
> > >
> > >
> > > ----- Original Message -----
> > > From: "Willie Hunter" <williehunter2@xxxxxxxxxxx>
> > > To: <techassist@xxxxxxxxxxxxx>
> > > Sent: Thursday, March 11, 2004 9:45 PM
> > > Subject: [TechAssist] Re: Fw: Wards Signature 2000 TV Model MWM2553Y
> > >
> > >
> > > Go to setup and adjust the red.
> > > Willie.
> > > Hunter TV
> > >
> > >
> > > >From: "Technotronic Dimensions" <steve@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
> > > >Reply-To: techassist@xxxxxxxxxxxxx
> > > >To: <techassist@xxxxxxxxxxxxx>
> > > >Subject: [TechAssist] Re: Fw: Wards Signature 2000 TV Model MWM2553Y
> > > >Date: Thu, 11 Mar 2004 21:09:44 -0500
> > > >
> > > >Replaced Q5106, and tried wire around FBT core for heater. Retrace
was
> > > >gone,
> > > >color improved, but still Streaky and unbalanced. Found R5110 open.
> > > >Replaced, took off the heater boost , and put regular Heaters back
on.
> > > >Color
> > > >much better, balanced, no streaks, but too much red....hardly any
blue
> >or
> > > >Green. Replaced other 2 120K resistors for the other 2 Colors like
> >R5110
> > > >was
> > > >for , still have too much red, and hardly any blue or green. Is this
a
> >Bad
> > > >CRT ? Any way to determine it without a CRT checker / Rejuvinator?
> > > >
> > > >Steve Hearns
> > > >Technotronic Dimensions, NY [USA]
> > > >WWW.TECHNOTRONIC-DIMENSIONS.COM
> > > >1-877-817-9885 (Voice / Fax Toll Free - US Only)
> > > >
> > > >
> > > >
> > > >
> > > >----- Original Message -----
> > > >From: "Technotronic Dimensions" <steve@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
> > > >To: "Tech_Assist.ORG" <techassist@xxxxxxxxxxxxx>
> > > >Sent: Thursday, March 11, 2004 6:41 PM
> > > >Subject: [TechAssist] Fw: Wards Signature 2000 TV Model MWM2553Y
> > > >
> > > >
> > > >Just Found a Sticker on the Chassis: 9-1407 and Q5106 Reading 200
Ohms
> >E-C
> > > >Both ways.
> > > >Going to replace it, and Winstips Says to Isolate the Heaters with 5
> >Turns
> > > >around the FBT core with with 20 Ga. Wire.
> > > >
> > > >I see this CRT is commonly bad.
> > > >
> > > >Steve Hearns
> > > >Technotronic Dimensions, NY [USA]
> > > >WWW.TECHNOTRONIC-DIMENSIONS.COM
> > > >1-877-817-9885 (Voice / Fax Toll Free - US Only)
> > > >
> > > >
> > > >----- Original Message -----
> > > >From: "Technotronic Dimensions" <steve@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
> > > >To: <techassist@xxxxxxxxxxxxx>
> > > >Sent: Thursday, March 11, 2004 6:08 PM
> > > >Subject: Wards Signature 2000 TV Model MWM2553Y
> > > >
> > > >
> > > >|
> > > >| Not Sure what chassis this is the Same as? It has a Zenith CRT
> >A63ADG31X
> > > >,
> > > >| with ZENITH Stamped in the rubber FBT Anode Cup. Safe to say its a
> >Zenith
> > > >| Chassis, but Which? CRT seems to be 25-27 Inches.
> > > >|
> > > >| Powers up ok, but Colors are Dim, overall Dim / unbalanced
> >Colors....as
> > > >if
> > > >| the Gamma is missing. IC4121 is getting real hot, and its Clip on
> >Heat
> > > >Sink
> > > >| is loose. Not sure if its related.
> > > >|
> > > >| Mfr'd Aug. 1994. Any help appreciated, Thanks.
> > > >|
> > > >| Steve Hearns
> > > >| Technotronic Dimensions, NY [USA]
> > > >| WWW.TECHNOTRONIC-DIMENSIONS.COM
> > > >| 1-877-817-9885 (Voice / Fax Toll Free - US Only)
> > > >|
> > > >
> > > >
> > > >
> > >
> >
>
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