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THANK YOU FOR A GOOD TRANSACTION, NICE COPY, CLEAR
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Very Good! All the diagram are easy to read, and its complete.
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This was an excellent source of detailed assembly information on a device which is at least 12 years old. A very lucky find, coupled with great service.
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Excellent Service Manual and best price on the Internet. This Service Manual covers everything you could ever need including full circuit schematics, component layout diagrams, stripdown procedure and full parts list/breakdown. I needed this to carry out a modification to one of these headunits and this manual covered everything I needed. Fast delivery, processed within a few hours.
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Thought I would never find a copy of the Technics SX-EN2 Service Manual until I found Owner-Manuals.com. Price was very fair and I received the download promptly. While a photocopy, it is quite readable and includes all the pertinent information and diagrams. Thank you Owner-Manuals!
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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