Troubleshooting - JVC KW-XC88 Service Manual

QQ
3 7 63 1515 0
5.1 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
FAN8037"32"
REST SW
When correctly focused
FEO
TA2147F-X
"15"
Focus Servo Loop ON o
TE
L 13942296513
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.
1-32 (No.MA099B)
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SECTION 5

TROUBLESHOOTING

Set Function CD
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 n
remains closed
Tracking loop closed
RF signal eye-pattern
opens
Jump to the first track
x ao
y
i
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8
Power ON
Disc inserted
YES
Laser emitted
"No disc"
Focus search
display
YES
Q Q
3 6 7 1 3
Disc rotates
Microprocessor
commands
DMO
TC9490FA"41"
Spindle
motor(-)
FAN8037
TOC read out "33"
Play
u163
.
2 9 9 4 2 8
When the laser diode correctly
emits
$84
Microprocessor
commands
SEL
TC9490FA"38"
LD
CN601"1"
1 5 0 5 8 2 9 9 4
When the disc correctly rotates
$84 $86 $ A200
Rough
Acceleration Servo CLV
Servo
0.5 Sec 0.5 Sec
Tracking Servo Loop ON
RF signal
Rough Servo Mode v
CLV Servo Mode
m
(Program Area)
co
CLV Servo Mode
(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