Servo control apparatus for optical disc player

A servo control apparatus of an optical pickup for reading recorded information from a recording medium to generate a read signal, comprising:

• an error signal extractor for extracting an error signal from said read signal, said error signal indicating a deviation from a servo target value of said optical pickup;
• a driver for changing the servo position of said optical pickup;
• an equalizer for equalizing said error signal to generate a drive signal for driving said driver;
• an integral value calculator for calculating an integral value of said error signal for each predetermined angular section of rotation of a track on said recording medium;
• a memory for storing each of the integral values for one rotation of said recording medium;
• a dropout detector to detect an occurrence of a dropout of said read signal;
• a variation calculator for calculating a variation by comparing said integral value for an angular section of rotation where said dropout occurred with a stored integral value for the identical angular section of rotation prior to the occurrence of the dropout;
• and
• a controller for changing an equalization characteristics of said equalizer in accordance with said variation.