Flow Of Functional Operation Until Toc Read - JVC KD-LH7R Service Manual

Flow of functional operation until TOC read

• When the pickup correctly moves
to the inner area of the disc
Microprocessor
commands
FMO
TC94A14FA "40"
FEED MOTOR
+TERMINAL
TERMINAL
IC681 "4"
REST SW
• When correctly focused
FEO
TA2157FN "15"
Focus Servo Loop ON
Power ON
Set Function to CD
Disc inserted
Pickup feed to the inner area
Laser emitted
Focus search
Disc rotates
RF signal eye-pattern
remains closed
Tracking loop closed
RF signal eye-pattern
opens
TOC readout
Jump to the first track
Play
• When the laser diode correctly
Microprocessor
commands
TC94A14FA"38"
CN601"10"
YES
"No disc"
display
YES
• When the disc correctly rotates
Microprocessor
commands
TN94A14FA
"41"
Spindle
motor (-)
IC681 "7"
Acceleration Acceleration
Tracking Servo Loop ON
• RF signal
KD-LH7R
emits
3.3V
1
3.3V
Rough
Servo Servo CLV
0.5 Sec 0.5 Sec
Rough Servo Mode
CLV Servo Mode
(ProgramArea)
CLV Servo Mode
(Lead-In Area;
Digital: 0)
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