1-26 (No.49876)
4.2
Flow of functional operation unit TOC read
When the pickup correctly moves
to the inner area of the disc
v
Microprocessor
commands
FMO
TC94A14FA "40"
FEED MOTOR
+TERMINAL
IC501 "4"
REST SW
When correctly focused
Focus Servo Loop ON
Power ON
Set Function CD
Disc inserted
Pickup feed to the inner area
YES
Laser emitted
Focus search
YES
Disc rotates
RF signal eye-pattern
remains closed
Tracking loop closed
RF signal eye-pattern
opens
TOC read out
Jump to the first track
Play
When the laser diode correctly
emits
Microprocessor
commands
SEL
TC94A14FA"38"
LD
CN501"15"
"No disc"
display
When the disc correctly rotates
Microprocessor
commands
DMO
TC94A14FA "41"
Spindle
motor(-)
IC501 "7"
Tracking Servo Loop ON
RF signal
Rough Servo Mode
CLV Servo Mode
(Program Area)
CLV Servo Mode
(Lead-In Area;
Digital :0)
$83
$82 $81
0V
6V
4V
2V
OFF
ON
3.3V
Hi-Z
FEO
TA2157 "15"
2.2V
$84
3.3V
0V
4V
0V
$84
$86
$ A200
3.3V
2.2V
0V
6V
3.2
2V
Rough
Servo
Acceleration
Servo CLV
0.5 Sec
0.5 Sec
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