JVC GR-DVL9800U Instruction Manual

MX-G71R
Flow of functional operation until TOC read
Check Point
Play KeySlider turns RESTPower ONConfirm that the voltage at the pin5
SW ON.
of CN801 is "H"\"L"\"H".
Automatic tuning
of TE offset
Check that the voltage at the
Laser ON
pin40 of IC651 is + 5V?
Detection of disc
Automatic tuning of
Focus offset
Confirm that the Focus error
Automatic measurement of
S-cuve signal at the pin28 of
Focus S-curve amplitude
IC651 is approx.2Vp-p
Confirm that the signal from
Disc is rotatedpin24 IC651 is 0V as a
accelerated pulse during
Tracking error waveform at TOC reading
approx.400ms.
pin 25 ofApprox.3secFocus servo ON
IC601(TE)
(Tracking servo ON)
Approx
1.8V
VREF
Confirm the waveform of
Automatic measurement of
the Tracking error signal.
Tracking error amplitude
at the pin 25 of IC601 (R604)
(See fig-1)
TrackingTracking Disc to be
servoservobraked to stop
off statesAutomatic tuning ofon states
Disc statesTOC reading
to rotate finishes
Automatic measurementTracking error balance
of TE amplitude and
automatic tuning of500mv/div
TE balance 2ms/divFig.1
Automatic tuning of
Focus error balance
Automatic tuning of
Focus error gain
Automatic tuning of
Tracking error gain
Confirm the eys-pattern
TOC reading
at the lead of TP1
Play a disc
1-30