Flow Of Functional Operation Until Toc Read (Cd Section) - JVC CA-MXS6MDR Service Manual

Flow of functional operation until TOC read (CD section)

Power ON Disc play Key
Tracking error waveform at TOC reading
Approx.3sec
IC601
25pin(TE)
Approx
1.8V
VREF
TE servo OFF
start
Disc status
Automatic measurement
to rotate
at TE amplitude and
TE balance
REST switch to ON
TE offset auto adjust
FO offset auto adjust
TE servo
Disc to be
ON start
braked to stop
TOC reading
finishes
500mv/div
2ms/div
FO balance auto adjust
by slider
Laser ON
Disc detection
Auto measure FOS
curve amplitude
Disc rotated
Focus servo ON
(tracking servo ON)
Auto measure
TE amplitude
Auto measure
TE balance
FO gain auto adjust
TE gain auto adjust
TOC read
Play
CA-MXS6MDR
SP-MXS6MD
Check Point
Check that the voltage at
the pin33 of IC701 or pin3
of CN694 is 0V(a moment)?
Check the voltage at the pin40
of IC603 + side is +5V?
Confirm that the Focus error
S-curve signal at the pin28 of
IC603 is approx.2Vp-p
Confirm that the signal form
pin24 of IC603 is 0V as a
accelerated pulse during
approx.400ms.
Confirm the waveform of the
tracking error signal at the
pin25 of IC601.
(about 1.8Vpp)
Confirm the eye-pattern
at the lead of TP602.
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