Yamaha MDX-9 Manuel de service télécharger pdf (Page 22)

MDX-E100

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YES

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YES

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YES

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YES

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YES

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Disc cannot be loaded properly.

Does the loading function work properly when a disc is inserted?

Does No.4 pin of CN1901 become “L”?

Check CN1901 and SW1956.

Does a change occur at either No.9 or 10 pin of IC1601?

Does a change occur at either No.1 or 28 pin of IC1601?

Check CN1604 and IC1601.

Check IC1401.

Check M1953 and CN1604.

Does eject function work when the MD eject button is pressed?

Is the disc drawn in again immediately after it is ejected?

Check CN1901 and SW1956.

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YES

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YES

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Proceed to the check item “Checking by using the test mode”.

Is the play mode unavailable only with the high reflecting disc?

The play mode unavailable only with the low reflecting disc.

Is the voltage at No.93 pin of IC1401 1.02 ± 0.3V in the test

mode state with a high reflecting disc loaded?

Is the voltage at No.93 pin of IC1401 with a low reflecting disc loaded

3.2V ± 0.3V (recordable) or 2.06V ± 0.3V (recording inhibited)?

After readjustment, proceed to the check item “Normal reproduction”.

Check SW1952A/B, mechanical unit switch circuit board and CN1901.

Play mode is not available.

Is the play mode unavailable with either high reflecting disc

or low reflecting disc?

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YES

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Yamaha MDX-9 Manuel de service Page 22

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