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Yamaha MDX-9 Service Manual Page 23

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MDX-596
MDX-596
22
▼
NO
▼
YES
▲
▼
▼
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.63 pin of IC1401 at “L”?)
NO
NO
Check SW1936, soldered points in the mechanical switch
circuit board and around No.6 pin of CN1932.
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
▲
▲
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 IC3?
Check IC3.
▼
YES
Check the muting section of IC8.
▲
▼
NO
YES
NO
NO
YES
▲
Is the audio output waveform obtained at No.26 and 28 pins of CN1501?
Check the connection line IC1701 and CN1501.
▼
NO
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