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Q7T4-FP71G LCD Monitor Service Guide
Circuit Operation Theory
11
Confidential
3.3 Oscillator Circuit
Royer circuit uses the characteristic of transformer saturation to oscillate. When the DC power inject,
Q808 or Q809 will turns on, and the current Ic increases. After a period, the transistor will leave the
saturation status and Vce increase. The result causes the voltage of primary coil get lower. Finally the
transistor turn off, and another transistor turn on. These statuses are repeated and the pin7 and pin8 of
T801 will get a sine wave to turn on CCFL.
Summary of Contents for Q7T4-FP71G
Page 9: ...Q7T4 FP71G LCD Monitor Service Guide Alignment Procedure 9 Confidential Add FFC...
Page 10: ...Q7T4 FP71G LCD Monitor Service Guide Alignment Procedure 10 Confidential Add Tape...
Page 14: ...Q7T4 FP71G LCD Monitor Service Guide Alignment Procedure 14 Confidential Add one tape...
Page 16: ...Q7T4 FP71G LCD Monitor Service Guide Alignment Procedure 16 Confidential Add one screw...
Page 17: ...Q7T4 FP71G LCD Monitor Service Guide Alignment Procedure 17 Confidential Add 5 screw...
Page 19: ...Q7T4 FP71G LCD Monitor Service Guide Alignment Procedure 19 Confidential Add 2 screw...
Page 21: ...Q7T4 FP71G LCD Monitor Service Guide Alignment Procedure 21 Confidential...
Page 22: ...Q7T4 FP71G LCD Monitor Service Guide Alignment Procedure 22 Confidential Add one tape...
Page 24: ...Q7T4 FP71G LCD Monitor Service Guide Alignment Procedure 24 Confidential Add 4 screw...
Page 25: ...Q7T4 FP71G LCD Monitor Service Guide Alignment Procedure 25 Confidential Add 1 screw...
Page 27: ...Q7T4 FP71G LCD Monitor Service Guide Alignment Procedure 27 Confidential Finished...
Page 28: ...Q7T4 FP71G LCD Monitor Service Guide Alignment Procedure 28 Confidential...
Page 29: ...Q7T4 FP71G LCD Monitor Service Guide Alignment Procedure 29 Confidential...
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