JBL FLIP 3, Руководство по обслуживанию

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Trouble shooting Chart
BT does not work
BT does not work
Go
No Check U1 5PIN 3.3V
whether normal or not
No
Yes
Check theD4 C36 whether
normal or not
Check 3.3V of U5 voltage on main Board
whether normal or not
Check the Rest of U5 whether normal or
not
Yes
Check the clock and data of U5
Check the C43 C44 C45 C46 on main
board
whether normal
or not
No
Replace U5
Yes
No
Replace
C43 C44 C45 C46
Yes
Yes
Check voltage at U8PIN8:12V in main
Board whether normal or not
Check the power supply and
Replace U4 L8,D34 in main board
No
Check voltage at U8 PIN3 and pin5 :REF in
main Board whether normal or not
Replace Q12 in main board
Yes
No
Check the input signal of U10 in the main
board whether normal or not
Yes
Replace U10
No
Check the voltage, clock and data of U7
and in main board
Yes
5-4