MD-S301/S301W
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Check for solder failure around IC401.
• "Indication is not normal"
No
Is data waveform observed on the pin 7 of main unit
headphone terminal (J701)?
• "Playback state cannot be set"
Is it impossible to set both high-reflection disc and low-
reflection disc to playback state?
No
Check as stated in "Check in TEST mode"
Is data waveform of pin 41 of IC401 observed?
Is the pin 40 in "H" state?
Yes
Solder failure around IC404.
Replace remote control unit.
Is it impossible to play back only the high-reflection disc?
Is the pin 61 of IC401 in "H" state in the high-reflection disc
insertion test mode?
Yes
Check as stated in "Check in TEST mode"
Yes
No
Yes
No
Check mechanism flexible circuit board, CN601.
Yes
Is it impossible to play back only the low-reflection disc?
Is the pin 61 of IC401 in "L" state in low-reflection disc
insertion state?
Yes
Check as stated in "Check in TEST mode"
Yes
Check mechanism flexible circuit board, CN601.
No
Содержание MD-S301
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