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Yamaha MDX-E300 Service Manual page 38

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MDX-E300
Disc cannot be loaded properly.
Does the loading function work properly when a disc is inserted?
NO
Does No.5 pin of CN1401 become "H"?
YES
M
Does a change occur at either No.19 or 20 pin of IC1601?
YES
M
Does a change occur at either No.12 or 13 pin of IC1601?
YES
M
Check M903.
YES
M
Does eject function work when the MD eject button is pressed?
YES
M
Is the disc drawn in again immediately after it is ejected?
YES
M
Check CN1901 and SW1932.
Play mode is not available.
Is the play mode unavailable with either high reflecting disc
or low reflecting disc?
NO
M
Is the play mode unavailable only with the high reflecting disc?
YES
M
Is the voltage at No.93 pin of IC1401 1.45 ± 0.15V in the test
mode state with a high reflecting disc loaded?
YES
M
After readjustment, proceed to the check item "Normal reproduction".
38
YES
NO
NO
NO
NO
YES
NO
Check the connection between CN1401 and
CN1931 and check SW1932.
Check IC1401.
Check the connection between CN1401 and
CN1931 and check IC1601.
Proceed to the check item "Checking by using the test mode".
NO
M
Is the play mode unavailable only with the low reflecting disc?.
YES
M
Is the voltage at No.93 pin of IC1401 with a low reflecting disc loaded
1.75V ± 0.15V (recordable) or 2.15V ± 0.15V (recording inhibited)?
NO
YES
M
Check SW1931, loading circuit board and CN1931.

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