1-33
UX-A70MD
Flow of functional operation until TOC read (MD)
MD play key
Detection of Disc
Focus servo ON
(Tracking servo ON)
Automatic tuning of
Focus error gain
TOC reading
Play a disc
Power ON
Slider turns REST
Switch ON.
Check Point
Confirm that the voltage
at the pin 4 of CN406 are 0V
Mechanism Operation ON
Laser ON
Confirm that the voltage
at the pin 19 of IC500 are 4V
Automatic tuning of
Focus S-curve amplitude
Confirm that the Focus error
S-cuve signal at the pin34 of
IC310 is approx.2Vpp
Disc is rotated
It is confirmed that pin7 of CN408
become 0V from VREF as an acceleration
pulse between about 400ms.
Automatic tuning of
Tracking error gain
Confirm that the eye-pattern
at the pin38 of IC310
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