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Showing posts with the label 21PT9457

Philips 21PT9457 55 – Flat CRT TV Circuit diagram and adjustments

This chassis does not contain a specific Service mode. The Services and device setting can be made via Mode the Technical Assistance Factory. There is no program on TV Check method: Check the closed circuit to the tuner IC image encoder for detecting whether components defective. Or check if the resistance R117, R118, R203 and R204 has increased may cause the problem. No Good Picture or Dual Image Check the signal IF1 / IF2 to Q101 and relevant circuit. In this case the problem can be Q101 and / or SAW 101. No Picture or Color Correct • Check the circuit IC201 to RGB. • Check the welding IC and physical damage of the relevant circuit or check defective capacitors. Image with White Line Horizontal and Audio Check voltage supply of vertical IC301 and circuit relevant, and check the vertical sync signal IC201. Control Evil Operation Remote Check voltage at pin 64 of IC201. The normal value should be 5.15V. If correct check the welding connections front control panel. If it cannot be resol...