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SHARP QTCD210W
Service Manual


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

Description of SHARP QTCD210W 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.

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Text excerpt from page 19 (click to view)
QT-CD210H/W
� Laser failure.
Is +5V applied to the emiter of Q204 ? No Yes Check the PWB pattern of Q204.

Is +5V applied to the collector of Q204 ? Yes

No

Check the peripheral parts of IC803 and Q204.

Is +5V applied to the pin 75 (VDD) of IC802 ? No Yes Is +5V applied to the pin 1 (VCC) of IC801 ? No Yes

Check the PWB pattern between collector of Q204 and pin 75 of IC802.

Check the PWB pattern between collector of Q204 and pin 1 of IC801.

Is +0V applied to the pin 74 (SEL) of IC802 ? Yes

No

Check the laser come on when pattern cut between pin 8 (SEL) of IC801 and pin 74 (SEL) of IC802.

Is approx. 1.8V applied to the collector of Q801. Yes Check BI801/CNS801. If it is normal, the optical pickup is faulty.

No

Check the peripheral parts of IC801 and Q801. If it is normal, the optical pickup is faulty.

� Focus failure.
Does the optical pickup move up and down when the disc is removed? Yes Is the following waveform ouput at the pin 62 (FEI) of IC802 when the disc is set? Yes
pin 62 (FEI)

No

Check as stated in item "FOCUS SERVO SAWTOOTH WAVE FAILURE".

Check the periphery of IC801 and BI801/CNS801. Is it normal? No Yes The optical pickup is faulty.

pin 86 (FOO)

pin 63 (SBAD)

Is the waveform shown above input at the pin 63 (SBAD) of IC802? Yes IC801 is faulty.

No

Check the pattern between pin 13 of IC801 and pin 63 of IC802. Check the periphery of IC801 and BI801/CNS801.

� 19 �

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