Karaoke In Does Not Work - Philips HTB5540D/12 Service Manual

Karaoke in does not work

Karaoke in does
not work
Go
Check signal at XP9 PIN24 on
Board
: MIC_in signal is normal or not
Yes
Check Main Board U18 74HC4052 PIN5,
PIN14 L/R signal input right or not
Yes
Check U18 74HC4052 whether broken
not
Yes
Replace U18
5-11
Front
No
Check Karaoke switch is ON in
software setting and U602 is OK.
No Refer to Main Board XP9 and
cable between XP9 and XP9.
No
or
Check Main Board U26
Trouble shooting Chart
check the