JBL SB 200 (serv.man7) Service Manual ▷ View online
5-2 Trouble shooting Chart
Keys do not work
Keys do not work
Go
No
Check the connector to the main board
Yes
Replace the connector
No
Yes
Replace U718 on the main board
Check XP603 PIN13, PIN1 4 whether the
voltage is 3.3V or not
voltage is 3.3V or not
Fix or replace the key board
JBL
SB 200 Service Manual
Page 25 of 47
5-3 Trouble shooting Chart
Remote control does not work
Remote control
does not work
does not work
Go
No
Replace the battery for remote
control
control
Yes
Check the +3.3V net on IR Board to
Main Board XP062
Main Board XP062
No
Yes
Replace IR1
Check battery of remote control
whether
exhausted or not.
Check power supply of IR1 on IR Board
whether normal or not
XS4 Pin5 :+3.3V
JBL
SB 200 Service Manual
Page 26 of 47
5-4 Trouble shooting Chart
No audio output
No audio output
Go
No
Yes
Yes
No
Replace the AMP IC TPA3116
NO
Fix or replace the
power board
power board
Check voltage +18V (18V for TPA3116)
whether normal or not at on the main board
whether normal or not at on the main board
Check the voltage of AMP output whether
normal or not (about 9V)
normal or not (about 9V)
Check the voltage, clock and Data of
U101 and U714
U101 and U714
Check the 18V network and the power
board
board
JBL
SB 200 Service Manual
Page 27 of 47
5-5 Trouble shooting Chart
BT does not work
No
BT does not work
Go
Check power supply
Yes
No
Yes
Replace U10
Check U718 and its network
Check power supply of U10
3.3V
3.3V
Check PIN21 and PIN22 of U10 whether
normal or not
normal or not
JBL
SB 200 Service Manual
Page 28 of 47
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