Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems.

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Default Sony TV

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

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Default Sony TV

On 08/27/2012 07:35 PM, Vincent Schmitt wrote:
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,

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J. B. Wood e-mail:
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Default Sony TV

"J.B. Wood" wrote in message
...
On 08/27/2012 07:35 PM, Vincent Schmitt wrote:
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,

--
J. B. Wood e-mail:



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.

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