Primary timing controller 3

Published:2011/7/26 3:04:00 Author:Ecco | Keyword: Primary timing controller | From:SeekIC

The primary timing controller circuit is composed of the power supply circuit and timing control circuit, and it is shown in Figure 3-85. Step-down power supply circuit is composed of the capacitor Cl, resistors Rl, R2, voltage regulator diodes VS, rectifier diode VD and filter capacitor C2. Timing control circuit consists of lC, control buttons Sl, S2, capacitors C3-C7, resistors R3-R5, quartz crystal oscillators BC, thyristor VT and light-emitting diodes VLl-VL6. Rl and R5 select the 1/2W carbon film resistors or metal film resistors.



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