Flow Of Functional Operation Until Toc Read - JVC UX-M55 Service Manual

UX-M55

Flow of functional operation until TOC read

Power ON
1-18
Slider turns REST
SW ON.
Laser ON
Caution
Focus start
FOK
Turn on focus
servo
Disc spinning
Radial_error
scaling
PLL Lock
Turn on radial
servo
Read TOC
Confirm that the voltage at the pin5 of CN703 is
"H"/"L"/"H"
Check that the voltage at the pin10(LD) of
CN704 is +1.35V.
Before connecting a measuring instrument to
the measuring point, turn the power of the
main unit to OFF.
After performing a measurement and before
disconnecting the measuring instrument,
again turn the power of the main unit to OFF.
(If a measuring instrument is disconnected
while an electric current is being output to the
main unit, the pick up of the main unit will be
damaged.)
Check that the voltage at the pin1 and pin2 of
CN703 is +0.65V.
Confirm the eye-pattern at the "RFO" test point.
(Refer to "Printed circuit boards" section.)