1-30 (No.MA089)
SECTION 5
TROUBLESHOOTING
5.1
Flow of functional operation untill TOC read (CD)
When the pickup correctly moves
to the inner area of the disc
v
Microprocessor
commands
FMO
IC621 "40"
FEED MOTOR
+TERMINAL
IC661 "32"
REST SW
When correctly focused
Focus Servo Loop ON
o
Disc inserted
Pickup feed to the inner area
YES
Laser emitted
Focus search
YES
Disc rotates
RF signal eye-pattern
remains closed
n
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
IC621 "38"
LDO
CN601 "7"
"No disc"
display
When the disc correctly rotates
Microprocessor
commands
DMO
IC621 "41"
Spindle
motor(-)
IC661 "33"
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
IC601 "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
Power ON
Set Function CD
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