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The service manuel is very helpful, we where able to restore the device to its working operation again.
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Great quality complete service manual!!! complete parts list and drawings
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Again a great job. I never been disilluted from them! Clear scheme, complete and very good for repairing!
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Great manual just what I needed, great service as always, thanks.
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Great quality complete service manual! complete parts list and drawings. Thanks!
T D A 8374 has a black current stabilization loop, that autom atically adjust the black level to the cut-off voltage of the picture tubes three gun cathodes. S ince no current is flow ing w hen the voltage the cathode is equal to the cut-off voltage of the tube, the loop stabilizes at a very sm all gun current. T his �black current� of the three guns is m easured internally and com pared w ith a reference current, to adjust the black level of R G B out. T he black level loop is active during 4 lines at the end of the vertical blanking. In the first line the leakage current is m easured (m ax. acceptable 100
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