Optical disc apparatus

An optical disc apparatus, comprising:

• an optical pickup including
• a light source which irradiates a recording surface of an optical disc with a light beam and
• a photodetector which performs photoelectric conversion on light reflected from the recording surface;
• a signal generation section which generates a tracking error signal and a track cross signal from an electrical signal obtained by the photoelectric conversion;
• a servo control section which controls tracking of the optical pickup according to the tracking error signal and the track cross signal;
• a storage section which has stored therein a threshold value for binarizing the track cross signal;
• and
• a main control section which binarizes the track cross signal by using the threshold value and, by using the binarized track cross signal, checks a tracing state of a track provided on the recording surface, wherein
• when the servo control section detects a predetermined error, the main control section increases the threshold value and binarizes the track cross signal by using the increased threshold value.