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Electronics (serv.man2) - JBL Audio Brochure (repair manual). Page 6

Read JBL Electronics (serv.man2) Brochure online

5-1                             Trouble shooting Chart 
LEDS are not bright 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
NG 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
LEDS are not bright 
Go 
NG 
OK 
Check U2 Pin1/3(5V)    and Pin 5(3.3V) on 
the main board
Replace U2 on the main 
board
 
NG
OK 
OK 
Replace the U2 on the 
LED board 
Fix the 8PIN FFC 
Check the 8PIN FFC connector 
 
Check the SPI between the U5 and U2 on 
the LED board. 
Replace U5 on the main board 
JBL
AWAKE and RIZE Service Manual
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