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SHARP SDCX1W
Service Manual


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  • Contains Circuit Diagrams
  • Download
  • PDF Format
  • Complete manual
  • Language: English
Price: $4.99

Description of SHARP SDCX1W Service Manual

Complete service manual in digital format (PDF File). Service manuals usually contains circuit diagrams, printed circuit boards, repair tips, wiring diagrams, block diagrams and parts list. Service Manual ( sometimes called Repair Manual ) is used mainly by technicians.

If You just want to know how to use Your tv, video, mp3 player etc. You should look for Owner's Manual. After placing order we'll send You download instructions on Your email address.

The manual is available in languages: English

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Text excerpt from page 75 (click to view)
SD-CX1W
� The triangular wave for focus servo does not appear.
Is +3.3 V applied to pin 6 on IC3 ? No Yes Does the triangular wave appear at pin 33 on IC3 ? <Refer to the waveform diagrams on page 71.> Yes Does the triangular wave appear at pin 13 of IC1 ? <The same waveform as above> Yes Does the saw tooth wave appear between pins 3 and 4 of IC1 ? <Refer to the waveform diagrams on page 71.> Yes Does the saw tooth wave appear between pins 3 and 4 of CNS2 ? <The same waveform as above> Yes The PWB pattern has been cut. No The connection of CNS2 is poor or the optical pickup is defective. Check the parts around IC1 and the power supply line. IF OK, IC1 is defective. No The connection of signal lines between pin 33 on IC3 and pin 13 on IC1 is poor. No Check the parts around pin 33 on IC3. If OK, IC3 is defective. The +3.3 V line of IC3 is defective.

No

� The disc motor CLV servo is defective.

Does the disc motor rotate in the CD test mode 3 ? 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 ?

Yes

The disc motor is defective or wires have broken.

0.3 ~ 1.5 seconds
No

Does the disc motor rotate too rapidly or slowly ? Yes

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.> Yes

No

IC3 is defective.

5V 0.3 ~ 1.5 seconds

C3 is defective or wires have broken. 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.) Yes (Vp-p 1.2 V waveform) 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

Is the eye pattern Vp-p 1.2 V inputted to the pin 24 on IC3 ? Yes

No

Check the PWB pattern and C33.

IC3 is defective. (After checking the parts around it, replace it.)

� 75 �

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SDCX1W SHARP
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Complete owner's manual in digital format. The manual will be available for download as PDF file aft…
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