Flow Of Functional Operation Unit Toc Read - JVC KD-SX8250 Service Manual

Flow of functional operation unit TOC read

When the pickup correctly moves
to the inner area of the disc
$82 $81
$83
Microprocessor
commands
FMO
TC94A14FA" 40"
FEED MOTOR
+TERMINAL
IC561"4"
REST SW
When correctly focused
FEO
TA2157" 15"
Focus Servo Loop ON o
Power ON
Set Function CD
v
Disc inserted
3.3V
Hi-Z
0V
Pickup feed to the inner area
6V
4V
2V
OFF
Laser emitted
ON
Focus search
2.2V
Disc rotates
RF signal eye-pattern n
remains closed
Tracking loop closed
RF signal eye-pattern
opens
TOC read out
Jump to the first track
Play
When the laser diode correctly
Microprocessor
commands
SEL
TC94A14FA"38"
LD
CN501"15"
YES
"No disc"
display
YES
When the disc correctly rotates
Microprocessor
$84
commands
DMO
TC94A14FA"41"
Spindle
motor(-)
IC561"1"
Acceleration
Tracking Servo Loop ON
RF signal
KD-SX8250/KD-SX780
emits
$84
3.3V
0V
4V
0V
$86 $ A200
3.3V
2.2V
0V
6V
3.2
2V
Rough
Servo CLV
Servo
0.5 Sec 0.5 Sec
Rough Servo Mode v
CLV Servo Mode
(Program Area)
CLV Servo Mode
(Lead-In Area;
Digital :0)
1-19