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▶ E/W Circuit Constitution and Operation Principle.
Also, E/W circuit functions as a compensatory circuit against the picture shaking by reversely compensating the picture
swaying. This is possible by inputting ABL voltage to E/W using R433 as the picture brightness varies.
There are H,V, PIN-COMP as well in Factory data and these correct the high voltage regulation. If the H-COMP capacity
value increases, correction vector increases too and this causes a strong picture swaying. On the other hand, if the H-COMP
capacity value decreases, correction vector decreases causing extensive picture size change. V-COMP, likewise, controls the
vertical correction vector and operates in the same mechanism as H-COMP.
PIN-COMP is a function which corrects the movement of four corners of a picture. If the capacity value is excessive, a picture
curves outwards when the picture is bright. COMP capacity value, therefore, should be varied +/- 1step from the factory-
adjusted condition, since a gain widely varies dependant on the SET distribution.
▶ Before and After of E/W Circuit Correction
Samsung Electronics
Circuit Description
13-7
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