Edmonton Convergence Explanation

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 attention.  The  Convergence Gallery shows examples of pictures produced by damaged convergence circuits.

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 outlines.

Click here for examples of Convergence Printed Circuit Boards

This is the most common fault in all makes of rear projection TVs.

The 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 convergence repair.

In Home Service Request

CONVERGENCE GALLERY

One Visit "In Home" Projection TV Service