Flow Of Functional Operation Until Toc Read - JVC MX-J30 Service Manual

MX-J30/MX-J330/MX-J35R
2-26
Flow of functional operation until TOC read
Slider turns REST
SW ON.
Automatic tuning
of TE offset
[taserON_-}-—>
Detection of disc
Automatic tuning of
Focus offset
Automatic measurement of
Focus S-curve amplitude
Disc is rotated
Focus servo ON
(Tracking servo ON)
Automatic measurement of
i Tracking error amplitude
: se Automatic tuning of =
Tracking error balance
Automatic tuning of
Focus error balance
Automatic tuning of
Focus error gain
Automatic tuning of
Tracking error gain
TOC reading
Play a disc
™ Tracking error waveform at TOC reading
pin 25 of Approx.3sec
1C601(TE)
1
1
drecking Disc to be
St
on states braked to stop
TOC reading
finishes
Tracking
1 serve
4 lates
Disc states ° "
to rotate :
Automatic measurement
of TE amplitude and
automatic tuning of
TE balance
500mv/div
2msidiv Fig.1
Check Point
Confirm that the voltage at the pin5
of CN801 is "H'\"L'\"H".
Check that the voltage at the
pin40 of IC651 is + 5V?
Confirm that the Focus error
S-cuve signal at the pin28 of
IC651 is approx.2Vp-p
Confirm that the signal from
pin24 IC651 is OV asa
accelerated pulse during
approx.400ms.
Confirm the waveform of
the Tracking error signal.
at the pin 25 of IC601 (R604)
(See fig-1)
Confirm the eys-pattermn
at the lead of TP1