SONY 27" Trinitron model KV27T530

Images mostly Blue and some Green. Reddish hue in the corners and on
the onscreen Channel number. Color areas do wander around somewhat.
Otherwise image is sharp and clear.

Its a hernia box that I'd rather try to fix myself. I had opened it
before to fix a jittery upper screen that finally turned out to be a
cold solder. Its a single PCB and the wiring is so tightly routed
that there is little room to poke around. That is the PCB has to be
in its mounting or the cable harness won't reach the connector
receptacles. Therefore the TV won't function and impossible to tweak
or measure anything.

I worked as a computer service tech then as an oilfield
instrumentation tech. Ages ago I had several night classes in TV and
VCR repair so I am not entirely clueless. But I have never done TV
repair as a job to do it with minimum poking around.

Will appreciate any advice what to look for and fix.

Probably a fault in the degauss circuit from description, troubleshoot
the degauss thermister and related parts.

David

PaPaPeng wrote in message . ..
SONY 27" Trinitron model KV27T530

Images mostly Blue and some Green. Reddish hue in the corners and on
the onscreen Channel number. Color areas do wander around somewhat.
Otherwise image is sharp and clear.

Its a hernia box that I'd rather try to fix myself. I had opened it
before to fix a jittery upper screen that finally turned out to be a
cold solder. Its a single PCB and the wiring is so tightly routed
that there is little room to poke around. That is the PCB has to be
in its mounting or the cable harness won't reach the connector
receptacles. Therefore the TV won't function and impossible to tweak
or measure anything.

I worked as a computer service tech then as an oilfield
instrumentation tech. Ages ago I had several night classes in TV and
VCR repair so I am not entirely clueless. But I have never done TV
repair as a job to do it with minimum poking around.

Will appreciate any advice what to look for and fix.

I have identical color changes with a KV-27TR10. I have poked at the
de-gaussing control device and the individual color drivers with negative
results. I have yet to try de-gaussing. I plan to try it with a soldering
gun powering a couple coils of #14 and waving it around the face of the CRT.
Available time is a problem with me. I have the Sam's photofact on it. If
you succeed, please keep me in mind. Jules Beaudoin

If you have patchy colours in the picture, this is usually caused by a
failed degassing coil. If the problem occurred after you serviced the set,
look to see if the degaussing coil became disconnected. It is common that
the degausser-thermo resistor goes bad in some of these sets.

--

Jerry G. GLG Technologies GLG
==========================


"PaPaPeng" wrote in message
...
SONY 27" Trinitron model KV27T530

Images mostly Blue and some Green. Reddish hue in the corners and on
the onscreen Channel number. Color areas do wander around somewhat.
Otherwise image is sharp and clear.

Its a hernia box that I'd rather try to fix myself. I had opened it
before to fix a jittery upper screen that finally turned out to be a
cold solder. Its a single PCB and the wiring is so tightly routed
that there is little room to poke around. That is the PCB has to be
in its mounting or the cable harness won't reach the connector
receptacles. Therefore the TV won't function and impossible to tweak
or measure anything.

I worked as a computer service tech then as an oilfield
instrumentation tech. Ages ago I had several night classes in TV and
VCR repair so I am not entirely clueless. But I have never done TV
repair as a job to do it with minimum poking around.

Will appreciate any advice what to look for and fix.

On Sat, 21 Aug 2004 05:39:12 -0400, "Jerry G."
wrote:

If you have patchy colours in the picture, this is usually caused by a
failed degassing coil. If the problem occurred after you serviced the set,
look to see if the degaussing coil became disconnected. It is common that
the degausser-thermo resistor goes bad in some of these sets.


Thanks for the tip. I haven't got around to servicing it yet. TV
watching isn't that vital to me.

The problem happened last week. It was perfect but appeared after I
fell asleep on the sofa.

Panasonic and Sony tend to have problems relating to the DGS Thermistor and
Relay, ocassionally the control circutry to activate the degauss relay. Seen
many of these with the three pin thermistor that just flippin does not work
correctly after a few months service.
"PaPaPeng" wrote in message
...
On Sat, 21 Aug 2004 05:39:12 -0400, "Jerry G."
wrote:

If you have patchy colours in the picture, this is usually caused by a
failed degassing coil. If the problem occurred after you serviced the
set,
look to see if the degaussing coil became disconnected. It is common that
the degausser-thermo resistor goes bad in some of these sets.


Thanks for the tip. I haven't got around to servicing it yet. TV
watching isn't that vital to me.

The problem happened last week. It was perfect but appeared after I
fell asleep on the sofa.