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SD-CX1W
Yes
No
The +3.3 V line of IC3 is defective.
Check the parts around pin 33 on IC3. If OK, IC3 is
defective.
The PWB pattern has been cut.
Yes
• The triangular wave for focus servo does not appear.
Does the triangular wave appear at pin 33 on IC3 ?
<Refer to the waveform diagrams on page 71.>
No
The connection of signal lines between pin 33 on IC3 and
pin 13 on IC1 is poor.
Does the triangular wave appear at pin 13 of IC1 ?
<The same waveform as above>
No
Check the parts around IC1 and the power supply line. IF
OK, IC1 is defective.
Does the saw tooth wave appear between pins 3 and 4 of IC1
? <Refer to the waveform diagrams on page 71.>
Yes
Yes
Is +3.3 V applied to pin 6 on IC3 ?
No
No
The connection of CNS2 is poor or the optical pickup is
defective.
Does the saw tooth wave appear between pins 3 and 4 of
CNS2 ? <The same waveform as above>
Yes
Does the disc motor rotate in the CD test mode 3 ?
No
Yes
Does the disc motor rotate too rapidly or slowly ?
Yes
Recheck whether the optical pickup objective is dirty.
If it is dirty, clean it.
Check the connection between pin 19 on IC2 and pin 24 on
IC3. If OK, the optical pickup is defective.
No
Does the eye pattern appear at pin 19 on IC2 ?
<Refer to the waveform diagrams on page 70.>
(It is OK even if the waveform is not clear.)
IC3 is defective.
No
C3 is defective or wires have broken.
Yes
Yes (Vp-p 1.2 V waveform)
• The disc motor CLV servo is defective.
The disc motor is
defective or wires
have broken.
Yes
No
Is the voltage applied between
pins 27 and 28 of IC1 for about
0.3-1.5 seconds when switching
from the CD test mode 2 to 3 ?
Is the pin 41 on IC3 in the high
state for 0.3-1.5 seconds and
does it pulse when switching
from the CD test mode 2 to 3 ?
<Refer to the waveform
diagrams on page 70.>
Is the eye pattern Vp-p 1.2 V inputted to the pin 24 on IC3 ?
Check the PWB pattern and C33.
No
IC3 is defective. (After checking the parts around it, replace it.)
Yes
0.3 ~ 1.5 seconds
0.3 ~ 1.5 seconds
5 V
Summary of Contents for SD-CX1W(BL)
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