Maker Pro
Maker Pro

SONY KV-32S40 32" Trinitron screen distortion bowtie

G

gfgray

Jan 1, 1970
0
The bottom half of my screen intermittently shrinks like a bowtie an
sometimes the picture would just disappear. Giving the TV a goo
smack fixes it. Then, after the TV warms up, the problem no longe
intermittently appears

I resoldered a bunch of connections. Now, when I turn the TV on,
get the degauss sound and the power light blinks like it normall
does during warm up, but the picture never comes on. When I wa
resoldering, I found a spot that looked like sony spilled some solde
and may have shorted two connections on the mainboard. I cleaned tha
solder off. Could that have been an intentional solder connection o
this TV model?

Also, I pulled on that thick red wire that goes from this transforme
thing on the main board directly to the picture tube. I the
realized it wasn't supposed to come out of the transformer thing.
TI


-------------= Posted from Ugroups.com =------------
---= Fast & Free Web Portal to Usenet Newsgroups =--
-------------= http://www.ugroups.com/ =------------
 
J

JamesQB

Jan 1, 1970
0
Was it a solder splash that rubbed off, or did you melt and remove th
solder across the two connections? It sounds like you may have remove
a solder link that should be in place. If the solder was making goo
connection between the two areas it was bridging, then it's a simpl
of case of logic: if the set was working fine like that, then i
wasn't an accidental solder splash, or something would have bee
malfunctioning from day of production

As for the lead you pulled on, that's the EHT lead that carrie
several kilovolts to the CRT anode. I would avoid messing with thi
lead. Did you pull it partly out of the transformer or something? I
you didn't pull it from its catches, then I doubt you've done it an
harm, but make sure you haven't partly pulled it out and that th
anode cap at the other end of the lead is still properly in place o
the CRT, but be very careful as the tube capacitanc
means that there is still dangerous and painful high voltage presen
sometimes even days after last having the set on

It may be best to have an engineer look at the set if you aren't sur
what's what. There are other parts which store a good deal of voltag
for long amounts of time and can be either bloody painful or at wors
dangerous. I personally think that for someone to try repairing thei
own sets, they should have at least basic knowledge such as knowin
what the flyback transformer is and does... etc. That way they ca
stay a bit safer
 
R

RDC

Jan 1, 1970
0
gfgray said:
The bottom half of my screen intermittently shrinks like a bowtie and
sometimes the picture would just disappear. Giving the TV a good
smack fixes it. Then, after the TV warms up, the problem no longer
intermittently appears.

I resoldered a bunch of connections. Now, when I turn the TV on, I
get the degauss sound and the power light blinks like it normally
does during warm up, but the picture never comes on. When I was
resoldering, I found a spot that looked like sony spilled some solder
and may have shorted two connections on the mainboard. I cleaned that
solder off. Could that have been an intentional solder connection on
this TV model?

Also, I pulled on that thick red wire that goes from this transformer
thing on the main board directly to the picture tube. I then
realized it wasn't supposed to come out of the transformer thing.
TIA


-------------= Posted from Ugroups.com =-------------
---= Fast & Free Web Portal to Usenet Newsgroups =---
-------------= http://www.ugroups.com/ =-------------



Those Sony sets are notorious for having bad solder joints that ca
kill the Power Supply and/or H.O.T. Ceck and see if the H.O.T i
shorted and then resolder everything that leads up to it, drive
transistor, transformer ect. Check the power supply for shorte
transistors as well as as an open resistor, R607.

Pulling the Anode wire (big red wire) out of the "flyback transformer
is EXTREMELY dangerous. Even if the sets been off for awhile and i
unpluged the tube still has a charge in it. You may want to leta tec
handle the rest of the repairs before ya discover the shocking side o
TV repair
 
J

Jeff Hackler

Jan 1, 1970
0
gfgray said:
The bottom half of my screen intermittently shrinks like a bowtie and
sometimes the picture would just disappear. Giving the TV a good
smack fixes it. Then, after the TV warms up, the problem no longer
intermittently appears.

I resoldered a bunch of connections. Now, when I turn the TV on, I
get the degauss sound and the power light blinks like it normally
does during warm up, but the picture never comes on. When I was
resoldering, I found a spot that looked like sony spilled some solder
and may have shorted two connections on the mainboard. I cleaned that
solder off. Could that have been an intentional solder connection on
this TV model?

Also, I pulled on that thick red wire that goes from this transformer
thing on the main board directly to the picture tube. I then
realized it wasn't supposed to come out of the transformer thing.
TIA


-------------= Posted from Ugroups.com =-------------
---= Fast & Free Web Portal to Usenet Newsgroups =---
-------------= http://www.ugroups.com/ =-------------

HOW LONG HAVE YOU BEEN SMACKING IT BEFORE IT FUCKED UP? DOES GIVING
YOUR WIFE A GOOD SMACK ALSO FIX YOUR MARRIAGE?
 
Top