JVC KD-S845 Service Manual page 13

QQ
3 7 63 1515 0
3.2 Flow of functional operation unit TOC read
When the pickup correctly moves
to the inner area of the disc
$83
Microprocessor
commands
FMO
TC9490FA "40"
FEED MOTOR
+TERMINAL
IC501 "7"
REST SW
When correctly focused
FOO
TA2157 "15"
Focus Servo Loop ON
TE
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$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
RF signal eye-pattern
opens
Jump to the first track
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2 9
8
Power ON
Set Function CD
Disc inserted
YES
Laser emitted
Focus search
YES
Disc rotates
Q Q
3 6 7 1 3
Tracking loop closed
TOC read out
Play
.
9 4 2 8
When the laser diode correctly
emits
$84
Microprocessor
commands
SEL
TC9490FA"38"
LD
CN601"1"
"No disc"
display
When the disc correctly rotates
Microprocessor
$84 $86 $ A200
commands
1 5 0 5 8 2 9 9 4
DMO
TC9490FA "41"
Spindle
motor(-)
IC501 "4"
Rough
Acceleration Servo CLV
Servo
0.5 Sec 0.5 Sec
Tracking Servo Loop ON
RF signal
Rough Servo Mode
CLV Servo Mode
(Program Area)
m
CLV Servo Mode
co
(Lead-In Area;
Digital :0)
9 9
3.3V
0V
4V
0V
2 8 9 9
3.3V
2.2V
0V
6V
3.2
2V
(No.49858)1-13