[TechAssist] Re: Sony TV KV-27V42 Horizontal Pulling
- From: "tvservice" <tvservice@xxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Fri, 12 Nov 2004 13:16:41 -0600
What about the (point) .47mfd cap in the horizontal drive circuit?
Did you change it?
Robert
tvservice@xxxxxxxxxxxxx
H & H Electronics Inc
----- Original Message -----
From: "John H Smit" <jhsm@xxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Friday, November 12, 2004 1:07 PM
Subject: [TechAssist] Re: Sony TV KV-27V42 Horizontal Pulling
> Hi Bob
> Thank you for your quick response as always,I get 19 rings on the fly
> between pin one and two, what do you think could be in the fly's
rectifiers
> maybe bad.
> The fly is quite expensive,and the waveform is not really bad, on the HO
> transistor and the timing is within normal range.
> I have a suspicion that it is the fly but hate to spend that much and
coming
> to find it is not it.
> I should be able to check the rectifiers in the fly with my VA62 never
done
> that but could give me a hint'
> If you have a different suggestion I would appreciate that,or someone
else.
> Thanks again Bob
> John
> ----- Original Message -----
> From: "Gemini Computer & TV" <geminitv@xxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Friday, November 12, 2004 10:29 AM
> Subject: [TechAssist] Re: Sony TV KV-27V42 Horizontal Pulling
>
>
> > Sounds like a good possibility of a bad flyback but see the following:
> >
> > ---------------------------------------------------------------
> > Text pasted from WinSTIPS 2.0
> > http://www.ServiceSoftware.com
> > ---------------------------------------------------------------
> >
> > SONY KV27V42
> >
> > Distorted Picture Verticals Were Bent Slightly Out Then In Again At Top
> > Thrid Of Scan
> >
> > Shoreline Electronics Repair - Jeff Stielau
> >
> > Replaced D522 (Part# 8-719-991-33) On The A Board, This Diode Is Part Of
> > Pin
> > Correction Circuitry It Did Not Check Defective.
> >
> >
> > ---------------------------------------------------------------
> >
> > SONY KV27V42
> >
> > Pix Distorted
> >
> > Jnm
> >
> > D522 # 871999133 A Pcb
> >
> > ---------------------------------------------------------------
> >
> > SONY KV27V42
> >
> > Shuts Down / Powers On : Pulses A Few Times : Shuts Down
> >
> > Jeff Stielau : 10/17/04 : Shoreline Electronics Repair
> >
> > Scopng The Collector Of The Horizontal Output As The Sets Tries To Start
> > Reveals A Severly Distorted Waveform. Defective Flyback T502
> > 1-453-268-21
> >
> > The Number On The Flyback Was 8-598-998-00 But Could Not Source This #.
> > Original Flyback About $65.00 ( Cough! )
> >
> > ---------------------------------------------------------------
> >
> > Bob Waterman, CET® #RI-28
> > Master Technician License #9109
> > Service Manager / Parts Manager
> > Gemini Computer, TV, & Security Alarms
> > (508)695-7302
> > (508)695-7769 FAX
> > geminitv@xxxxxxxxxxx
> >
> >
> >
> > ----- Original Message -----
> > From: "John H Smit" <jhsm@xxxxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Friday, November 12, 2004 12:16 PM
> > Subject: [TechAssist] Sony TV KV-27V42 Horizontal Pulling
> >
> >
> >> Hello to all
> >> I got this Sony TV KV-27V42 which was dead,and after changing the
shorted
> > HO
> >> transistor it came back on but the picture shows horizontal pulling,
the
> >> transistor gets very hot and the TV will click off after about 30 sec.
> >> I scoped the waveform on the collector of the HO transistor and the DC
> >> voltage shows 135 volt and the p/p voltage 1134 V, I do not have a S/M
> >> yet
> >
> >> and I was wondering if anybody could give me a hint on this one.
> >>
> >> It is a 2001 TV so I wonder if a Sams has been made yet.
> >> Thank you in advance.
> >> John H Smit
> >> Smit's TV Service
> >> Box10
> >> Gunnison Utah 84634
> >> 800-355-4948 Fax&Phone
> >> 435-528-7955 Fax&Phone
> >> jhsm@xxxxxxxxxx
> >>
> >>
> >>
> >>
>
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