JVC KD-LH7R Service Manual page 21

QQ
3 7 63 1515 0
Flow of functional operation until TOC read
• When the pickup correctly moves
to the inner area of the disc
Microprocessor
commands
FMO
TC94A14FA "40"
FEED MOTOR
+TERMINAL
TERMINAL
IC681 "4"
REST SW
• When correctly focused
FEO
TA2157FN "15"
Focus Servo Loop ON
TE
L 13942296513
www
.
http://www.xiaoyu163.com
eàYGNg u5•ïVþ•Q
Pickup feed to the inner area
RF signal eye-pattern
remains closed
Tracking loop closed
RF signal eye-pattern
opens
Jump to the first track
x ao u163
y
i
http://www.xiaoyu163.com
http://www.xiaoyu163.com
2 9
8
Power ON
Set Function to CD
Disc inserted
YES
Laser emitted
"No disc"
Focus search
YES
Disc rotates
Q Q
3 6 7 1 3
TOC readout
Play
.
9 4 2 8
• When the laser diode correctly
emits
Microprocessor
commands
TC94A14FA"38"
1
CN601"10"
display
• When the disc correctly rotates
Microprocessor
1 5 0 5 8 2 9 9 4
commands
TN94A14FA
"41"
Spindle
motor (-)
IC681 "7"
Rough
Acceleration Acceleration
Servo
Servo CLV
0.5 Sec 0.5 Sec
Tracking Servo Loop ON
• RF signal
Rough Servo Mode
CLV Servo Mode
(ProgramArea)
m
co
CLV Servo Mode
(Lead-In Area;
Digital: 0)
KD-LH7R
9 9
3.3V
2 8 9 9
3.3V
1-21