1-42 (No.MA081)
SECTION 5
TROUBLESHOOTING
5.1
Feed section
5.2
Focus section
5.3
Spindle section
Is the voltage output at
IC501 pin "63"?
Is the wiring for IC501
pin "63"?
Are the voltage inputs at IC501 pins "4","13",
"29","40" ,"59","70","75","78" and "91"?
Check Q581 - Q585 or
CD 8V/ON5V lines.
Check the vicinity of
IC501 or IC501.
Check the feed motor
connection wiring.
Are the voltage outputs
at IC581 "17" and "18"?
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
IC581 or IC581.
NO
When the lens is
moving:
4V
Does the S-search
waveform appear at
IC581 pins "13" and "14"?
Check the wiring between
IC581 and IC501.
Check the pickup and
its connections
Is the voltage input at
IC581 pin "1"?
YES
Is the voltage output at
IC501 pin "60" ?
YES
YES
NO
NO
Check the vicinity of
IC581 or IC581.
Check Q581 - Q585 or
CD 8V/ON5V lines.
Check the vicinity of
IC501 or IC501.
NO
YES
Are the voltage inputs at IC501 pins "4","13",
"29","40" ,"59","70","75","78" and "91"?
NO
NO
YES
Is the disk rotated?
Proceed to the Tracking
section.
Are the voltage outputs at
IC581 pins "15" and "16"?
Check the spindle motor
and its wiring.
YES
Is the voltage input at
IC581 pin "26"?
Check the wiring between
IC581 and IC501.
Is the voltage output at
IC501 pin "64" ?
YES
NO
NO
YES
Check the vicinity of
IC581 or IC581.
Check Q581 - Q585 or
CD 8V/ON5V lines.
Check the vicinity of
IC501 or IC501.
NO
YES
Are the voltage inputs at IC501 pins "4","13",
"29","40" ,"59","70","75","78" and "91"?