SPARK - JBL Audio Service Manual (repair manual). Page 2

Read JBL SPARK Service Manual online

4-1                             Trouble shooting Chart 
Can not power on 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Can not power on 
 
Go 
NO 
Yes 
Measure the voltage of FB14, 3.3V is 
normal.
 
No
Yes 
Yes 
Yes 
Try to reload BT software 
No
LED is broken 
Check the output of the 
adaptor, 13V is normal. 
Check XP12 whether 13V is normal or not
 
Check PIN8 of U7, 3.3V is normal 
Check the voltage of FB15, 13V is normal. 
Replace the adaptor
 
NO 
Mainly check the U2 
No
BT module is broken 
No
Check Q2 and Q5 
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