5-11 Trouble shooting Chart
Karaoke in does not work
Karaoke in does
not work
Go
No
Refer to Main Board XP9
Yes
Check the cable between XP9 and XP15
No
Replace U18
Check Main Board U26
Yes
Yes
No
Check signal at XP15 PIN18:MIC_in
signal from front board normal or not
Check Main Board U18 74HC4052 PIN5,
PIN14 L/R signal input right or not
Check U18 74HC4052 whether broken
or
not
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