Yamaha MDX-9 Manuel de service télécharger pdf (Page 23)

MDX-E100

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YES

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YES

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Normal reproduction

Applicable when the E2-PROM value has been confirmed as normal in the test mode

Is initialization done properly for reproduction of a high reflecting disc?

Does the play time display count up properly?

Is the disc turning properly?

Check IC1201.

Does the lead-in switch turn on with the pickup at the

innermost track in the test mode?

(Is No.6 pin of IC1401 at “L”?)

Check SW1953, soldered points in the mechanical switch

circuit board and around No.1 pin of CNP1901.

Is reading function attempted repeatedly to read the TOC section of

the low reflecting disc?

A new disc has no recording in the TOC section.

Replace it with a recorded low reflecting disc.

Check the position of the lead-in switch by selecting the lead-in

switch position measurement mode from the adjustment items for

the high reflecting disc.

YES

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Audio reproduction circuit

Applicable when no sound is produced although the play time display counts up properly during reproduction in the normal mode

Is the audio output waveform obtained at No.24 and 26 pins of IC1701?

Check No.70 - 72, 74 pins of IC1201 and No.12, 16,

17, 19 pins of IC1701.

Is the audio output waveform obtained at No.1 and 7 pins of IC101?

Check IC101.

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YES

Check the muting section of IC106.

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YES

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Yamaha MDX-9 Manuel de service Page 23