28
D-A03
The laser does not light up
No
No
No
Is +1.8V applied to pin 10 of CX151 ?
The optical pickup is defective if CX151 is normal.
Yes
Yes
Yes
Is 1.5V applied to the LDO terminal of pin 7 of IC146 ?
IC146 is defective
Is +1.8V applied to the collector of TR101 ?
The PWB pattern has been cut between TR101 and pin 10
of CX151.
Is +3.3V applied to C109 of R108 ?
R108 is defective.
No
Check the +3.3V stabilization circuit of IC145 and L103.
Yes
No
Yes
Yes
Does the pickup lens go up and down when removing the
disc ?
Refer to "The triangular wave for focus servo does not
appear".
Check the optical pickup wires. If OK, the optical pickup is
defective.
Out of focus
No
Is the waveform inputted at pin 15 on IC146 when loading a
disc ? <Refer to the waveform diagrams on page 31.>
IC146 is defective.
No
Normal
Is the output (tracking error signal) found at pin 4 and 5 on
IC145 in the CD test mode 3 ?
Check between IC145 and CX151. If OK, the optical pickup
is defective.
Check the parts around IC146. If OK, IC146 is defective.
HF is abnormal
Abnormal
Is tracking input found at pin 11 of IC146 ?
<Refer to the waveform diagrams on page 31.>
No
Yes
Check the parts around IC149. If OK, IC149 is defective.
Is the tracking output found at pin 34 in IC149 in the CD test
mode 4 ?
No
Yes
Check the parts around IC145. If OK, IC145 is defective.
Is there the output between pin 5 and 6 on IC145 ?
Yes
Check the portion between IC145 and CX151 and connection of the optical pickup wires. If OK, the optical pickup is defective.
No
Does the sled motor run by pressing the / button in
the test mode ?
Refer to "The sled motor does not run".
IC146 is defective.
Track search is impossible
Is the waveform outputted to pin 11 and 17 on IC146 when a
track is jumped ?
<Refer to the waveform diagrams on page 31.>
No
Yes
IC149 is defective.
Is the waveform output found at pin 34 and 40 on IC149 when
a track is jumped ?
<Refer to the waveform diagrams on page 32.>
Yes
Yes
No
If the parts around IC145 are normal, IC145 is defective.
Is the slide output found at pin 25 and 26 on IC145, and the
tracking output at pin 5 and 6 ?
Yes
Check the portion between IC145 and CX151 and connection of the optical pickup wires. If OK, the optical pickup is defective.
Check the portion between IC145 and CX062, sires and periphery of the sled spin motor. If OK, the motor is defective.
No
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