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

  • From: <hartstv@xxxxxxxxxxx>
  • To: <techassist@xxxxxxxxxxxxx>
  • Date: Thu, 11 Sep 2003 09:11:23 -0300

Gary,Not sure if your XBR unit has these but on similiar models check
R571=3.3~1w,D512,L501 &Q508=2SC3298B.Also IC651 regulator..........
Don of HARTS-TVCR-ASC
9 Robert St,Oromocto,NB,Canada,E2V3N2
Tel-506-357-9785,Fax-506-357-6010
hartstv@xxxxxxxxxxx



----- Original Message -----
From: "Valley TV" <valleytv@xxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Wednesday, September 10, 2003 10:12 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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