(No.MA089)1-31
5.2 Feed section
5.3 Focus section
5.4 Spindle section
5.5 Tracking section
Is the voltage output at
IC621 pin "40"?
Is the wiring for IC621
pin "40"?
Is 3.3V present at IC621 pins
"6","15","25","39" and "43"?
Check Q661 or
CD 8V.
Check the vicinity of
IC621 or IC621.
Check the feed motor
connection wiring.
Is 6V or 2V present at
IC661 "31" and "32"?
Is 4V present at both
sides of the feed motor?
Check the feed motor.
YES
YES
NO YES NO
YES
NO
NO
NO
YES
Check the vicinity of
IC661 or IC661.
NO
When the lens is
moving:
4V
Does the S-search
waveform appear at
IC661 pins "38" and "39"?
Check the wiring between
IC661 and IC621.
Check the pickup and
its connections
Is the voltage input at
IC661 pins "47" and "48"?
YES
Is the voltage output at
IC621 pin "33" ?
YES
YES
NO
NO
Check the vicinity of
IC661 or IC661.
Is 3.3V present at IC621 pins
"6","15","25","39" and "43"?
Check Q661 or
CD 8V.
Check the vicinity of
IC621 or IC621.
NO
YES
NO
NO
NO
NO
YES
YES
YES
Is the disk rotated?
Does the RF signal
appear at IC601 pin "19"?
Is the RF waveform at
IC601 pin "19" distorted?
Proceed to the Tracking
section.
Is the voltage output at
IC661 pins "33" and "34"?
Check the spindle motor
and its wiring.
Check the circuits in the
vicinity of IC601 pin "19"
or the pickup
YES
Is the voltage input at
IC661 pins "5" and "6"?
Check the wiring between
IC661 and IC621.
Is the voltage output at
IC621 pin "41" ?
YES
NO
NO
YES
Check the vicinity of
IC661 or IC661.
Is 3.3V present at IC621 pins
"6","15","25","39" and "43"?
Check Q661
or CD 8V.
Check the vicinity of
IC621 or IC621.
YES
NO
YES
NO NO
When the disc is rotated
at first:
Approx. 1.2V
Is the tracking error signal
output at IC601 "11"?
Check IC621.
Check the circuit in the
vicinity of IC601 pins
"2" to "7".
Check the pickup and
its connections
YES
Check the vicinity of
IC601 or IC601.
w
w
w
.
x
i
a
o
y
u
1
6
3
.
c
o
m
Q
Q
3
7
6
3
1
5
1
5
0
9
9
2
8
9
4
2
9
8
T
E
L
1
3
9
4
2
2
9
6
5
1
3
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
To Next Page
Loading...
