Flow Of Functional Operation Until Toc Read - JVC MX-J150R Service Manual

Flow of functional operation until TOC read

Power ON
Tracking error waveform at TOC reading
Pin 54 of
Approx.3.7sec
KB9223/TE
(IC922)
Approx
0.4V
2.50V
Disc states
to rotate
Play Key
Automatic adjusting of
Automatic adjusting of
Automatic adjusting of
Automatic adjusting of
Automatic adjusting of
RESET a CD LSI
LIMIT SW ON
SET Default value of
TE gain, TE balance
focus bias
FE offset
TE offset
LASER power ON
Detection of disk
Disc is rotated
TE balance
TE gain
TOC reading
Play a disc
Check Point
Confirm that the voltage at the pin38
of KB9223(IC922) is "L"
Confirm that the voltage at the pin41
of KB9223(IC922) is "H"
Confirm that the voltage at the
pin70 of KB9223(IC922) is 3.5V.
Confirm that the signal from pin46
of KB9223(IC922) is 3.5V as a
accelerated pulse during
approx.1.96s.
Confirm the waveform of
the Tracking error signal
at the pin 54 of KB9223(IC922).
Confirm the eye-pattern
at the pin74 of KB9223(IC922).
"H".
"L" "H".