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Very good quality pdf file, no missing pages and all words and schematics clearly readable. Whole manual is present featuring different languages.
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Very,very good manual.It was very explicit and readble.It was helpfull.Thanks.
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The service manual is scanned, but high quality, high resolution. The smallest texts on schematics diagram is readable. Super! Thank you!
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I am satisfied with the service. And if need another manual, i will definitely buy from this site. Keep up the good work.
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have download a number of manuals todate , most are excellant, one or two sometimes a little difficult to read but a least avaialable, great site .
Brad.
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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