Troubleshooting - JVC KD-SH9101 Service Manual

5.1 Flow of functional operation untill TOC read (CD)
When the pickup correctly moves
to the inner area of the disc
$83
Microprocessor
commands
FMO
TC94A14FA "40"
FEED MOTOR
+TERMINAL
IC681 "17"
REST SW
When correctly focused
FEO
TA2157 "15"
Focus Servo Loop ON o
SECTION 5

TROUBLESHOOTING

v
Set Function CD
$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
Disc inserted
YES
Laser emitted
"No disc"
Focus search
display
YES
Disc rotates
Microprocessor
n
commands
DMO
TC94A14FA "41"
TOC read out
Play
When the laser diode correctly
emits
$84
Microprocessor
commands
SEL
TC94A14FA "38"
LD
CN601 "10"
When the disc correctly rotates
$84 $86 $ A200
Spindle
motor(-)
IC681 "16"
Rough
Acceleration Servo CLV
Servo
0.5 Sec 0.5 Sec
Tracking Servo Loop ON
RF signal
Rough Servo Mode v
CLV Servo Mode
(Program Area)
CLV Servo Mode
(Lead-In Area;
Digital :0)
(No.49841B)1-33
3.3V
0V
4V
0V
3.3V
2.2V
0V
6V
3.2
2V