CONVERGENCE REPAIR EXPLANATION
Click on Convergence Gallery
to Identify Your Fault
When A REAR PROJECTION TV has
coloured outlines or a 3D image the Convergence Circuits most likely need
Convergence Gallery shows examples of pictures produced by damaged
The convergence output amplifiers can burn out from a "bump" in the
120VAC power caused by lightning or large motors, etc drawing loads. The
bump may cause the High Voltage on the picture tubes (there are 3 in your
rear projection TV) to rise or jump a small amount, from 28kv to 28.5kv.
A small arc may occur for an instant between the picture tube HV connector
and the yoke around the neck of the picture tube or the ground frame.
One little arc causes little damage. Over a number of years the
accumulation of many "arcs" finally causes the output amplifiers for the
convergence circuit to fail. This is the part of the Projection TV that controls
lining up of the red, blue and green images.
Replacing the output amplifiers (located within the Convergence IC's)
allows the pictures to line up correctly, and eliminate the color
Click here for examples of Convergence Printed Circuit Boards
This is the most common fault in all makes
of rear projection TVs.
CONVERGENCE GALLERY demonstrates the problem.
Some models of TV require major disassembly and considerable
shop/manufacturer's support to repair because of their design. The poorly
designed products require a "bench" repair that can typically cost from
$350 to $700.
Some TVs are designed for on-site repair and have more reliable circuit
design that does not usually cause damage to other parts of the TV when
convergence chips fail.
Our Current Price is $257 for an in-home
In Home Service Request
One Visit "In Home"
Projection TV Service