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WAVEFORMS OF MAJOR CHECK POINTS
-1. HF signal (RF signal) waveform
(test point TP1) during normal play
« Focus coil drive waveform
(pin
NO. @ of IC807) and FOK (pin
NO. @ of IC801)
when focus search is accomplished.
Ov
(CH1)
Ov
(CH2)
CH1: FOCUS COIL DRIVE SIGNAL
2V/Div.
CH2:
FOK
4. Tracking coil drive waveform (pin NO.
© of.IC807) and TEO during track
traverse
(1) When time division is 20mS/div.
- OV
(CH1)
——
ov
(CH2)
CH1:
TEO
(
1V/Div.
CH2 : TRACKING COIL DRIVE SIGNAL
aviDiv.
(2) When time division is 0.5mS/div.
(During forward track traverse)
CH1: TEO
(
1V/Div.
CH2 : TRACKING COIL DRIVE SIGNAL
2v/Div.
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