Maker Pro
Maker Pro

Sony TV

V

Vincent Schmitt

Jan 1, 1970
0
Hi!
Sony KDF=E42A10, Thd set has a line across the picture, no distortion, I
think it is the light engine.
AmI right?
Thank you
Vince
 
J

J.B. Wood

Jan 1, 1970
0
Hi!
Sony KDF=E42A10, Thd set has a line across the picture, no
distortion, I think it is the light engine.
AmI right?
Thank you
Vince
Hello, and I don't recall seeing any component labeled "light engine" on
the schematic diagram of a television receiver ;-). I assume from your
posting that you've got a set that uses a CRT (picture tube) as a
display. A thin white horizontal line indicates a malfunction in the
vertical sweep circuits. It could be a vertical output transistor(s), a
short/open in the coil of the vertical deflection yoke or something in
the circuits comprising the vertical sweep oscillator. Also, a
component may not be defective - a broken/cold solder joint(s) can also
be the culprit. Sincerely,
 
M

Mark Zacharias

Jan 1, 1970
0
J.B. Wood said:
Hello, and I don't recall seeing any component labeled "light engine" on
the schematic diagram of a television receiver ;-). I assume from your
posting that you've got a set that uses a CRT (picture tube) as a display.
A thin white horizontal line indicates a malfunction in the vertical sweep
circuits. It could be a vertical output transistor(s), a short/open in the
coil of the vertical deflection yoke or something in the circuits
comprising the vertical sweep oscillator. Also, a component may not be
defective - a broken/cold solder joint(s) can also be the culprit.
Sincerely,


The KDF-E42A10 is an LCD rear-projector. No deflection circuit as such.

I don't think the OP said a thin white line - just "a line".

Could be almost anything. This model has a tendency to develop a red-blue
shading at the top and bottom 1" or so because of (probably) a bad
polarizing filter. Generally the whole light engine must be replaced because
individual parts for the optical engine are not sold.

Mark Z.
 
Top