JBL CHARGE 2 PLUS (serv.man7) Service Manual ▷ View online
29
Trouble shooting Chart
USB port for external devices cannot be charged
USB port for external devices
cannot be charged
Go
No
Yes
Yes
No
Repair U4
Check 15pin FFC cable connect OK or not
Check the U4 (LM3481) of CN
board is work well or abnormal
Check the U2 (TPS2546) of CN
board is work well or abnormal
Connect well
Replace CN board or main board for
comparison.
Repair U2
No
Yes
30
Trouble shooting Chart
Battery cannot charge
No
Battery cannot charge
Go
Check the battery is ok or not
Yes
No
Yes
Replace main board
Replace battery for comparison.
Check the impedance of Battery detection
foot is between 4KΩ to 28KΩ or not
Check the CN board to main board connector is
normal. And replace the CN board for comparison.
Connect well
Check the U1 (BQ2413) of main board
is work well or abnormal
Repair U1
No
31
Trouble shooting Chart
BT cannot work
BT cannot work
Go
Yes
Connect BT ANT to main board
NO
Repair U3
No
Go
Enter into DUT connection mode, Check BT
work normal or not
Check the U3 (LDO_G9091) of main
board is work well or abnormal
Check BT_3V3 is normal or not
Replace U6 (BTM153)
No
Yes
Replace main board
32
Trouble shooting Chart
AUX cannot work
AUX cannot work
Check the CN board to main board connector is
normal. And replace the CN board for comparison.
Connect well
No
Check the U7 (AK5358) and U9 (74LVC2G04GW)
of main board is work well or abnormal
Yes
Check the STB_3V3 and VDD_5V is work well or
abnormal
Check the AUD_DET is work well or
abnormal
No
Go
No
Check the U3 (LDO_G9091) and U6
(AS2910) of main board is work well or
abnormal
Replace main board
Go
Yes
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