Mitsubishi Diamond Plus 93SB, Service Manual, Page: 92 / 124

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3. Deflection Circuit
3.1 Deflection Control IC (IC501)
IC501 is in charge of the horizontal width control and the generation of vertical pre-amplifier output. This IC
follows the frequency and generates a proper output of horizontal drive pulses. For the screen size control,
this IC also generates the B+ output drive pulses.
In addition, using the control signals from the microcomputer IC701, this IC is used to control the trapezoidal
distortion, the pin balance, and the horizontal position. There are also outputs of horizontal and vertical
parabolic waveforms for focusing.
The pre-amplifier functions are available for the vertical screen width, the position, and the vertical linearity.
(Fig. 3.1)Deflection Control IC (IC501)
AFC feedback
(From H_OUT Circuit)
To B_DRIVE Circuit
To H_DRIVE Circuit
B_SENCE