[TechAssist] Re: Sony KV27XBR45 Ch# SCC-H81A-A **Pincushion, pulsing"

  • From: "Gemini Computer & TV" <geminitv@xxxxxxxxxxxxxxxx>
  • To: <techassist@xxxxxxxxxxxxx>
  • Date: Thu, 11 Sep 2003 07:17:59 -0400

I guess it can. See the following:

      Last Update
      11/2/2001 Event ID
      E14895621 Model
      KV27XBR45, KV32XBR45
      Subject
      INTERMITTENT VERT & HOR SIZE


SYMPTOMS

Unit is trying to constantly adjust the vertical height and horizontal size
intermittently.

RESOLUTION

When monitoring the E/W Pin output of the M board the signal was very
instable. It was decided to replace IC301 the Jungle IC. This corrected the
trouble.  8-752-063-50 (CXA1477AS).

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@xxxxxxxxxxxxxxxx
geminitv@xxxxxxx
www.geminicomputertvsecurityalarms.com



----- Original Message ----- 
From: "Shoreline Electronics" <jstielau@xxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Wednesday, September 10, 2003 9:25 PM
Subject: [TechAssist] Re: Sony KV27XBR45 Ch# SCC-H81A-A **Pincushion,
pulsing"


> This unit uses the CXA1477AS jungle IC.....never seen it cause PC
> issues....but there may be a first!
>
> ==========================
> Jeff Stielau
> Shoreline Electronics Repair
> 344 East Main Street
> Clinton,CT 06413
> 860-399-1861
> 860-664-3535 (fax)
> jstielau@xxxxxxxx
> ==========================
> "If you push something hard enough it will fall over."
> Fudd's First Law of Opposition - Sir Sidney Fudd
>
>
> ----- Original Message ----- 
> From: "Valley TV" <valleytv@xxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Wednesday, September 10, 2003 9:12 PM
> Subject: [TechAssist] Sony KV27XBR45 Ch# SCC-H81A-A **Pincushion, pulsing"
>
>
> > Hi everyone!
> > I absolutely had to take a break from this Sony KV27XBR45 before I went
> crazy..  Obvious pincushion problem on both sides but it also seems to be
> pulsing on the sides.  I carried this little monster down 3 flights of
> stairs and into my motel room (on the road again..) and have gotten bleary
> eyed working on it.  I replaced L510 (yes, I actually had 1) Q505, IC504,
> Q503 (pin out) and checked the solder connections on L509. Absolutely no
> luck..
> >
> > I'm starting to think I'm in the Bates Motel tonight!  I have no
schematic
> with me to help trace the circuit but I did notice the voltage on the
> collector of Q503 keeps changing from 3.1v up to 5.9 volts and back  B=.55
> E=0 but I have no idea what is correct.
> >
> > Any suggestions, PLEASE.
> >
> > Gary
> > Valley TV
> > valleytv@xxxxxxx (if anyone has a scan of the circuit)
> > -- 
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