JVC KD-S891R Schematic Diagrams page 36

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