JBL SB 350 Service Manual ▷ View online
SB350 SUBWOOFER EXPLODED VIEW
SB350 PACKAGING EXPLODED VIEW
Insert 1 Right
Insert Le
Ō
Insert Bo
Ʃom
Insert 1
Insert Top
NO POWER
SUPPLY
go
Check main
boardwhether have
19V on CON450
Check whether have
+5V_STB
Yes
No
Check power board
whether have 19V on
CON2
Yes
Replace power
board
Replace DC
cable
No
No
Check DC/DC(U456)
circuit
Check whether have
+3.3V_STB
Yes
Replace key board
cable
No
Check LDO U455
Yes
NO POWER SUPPLY
SB350 TROUBLESHOOTING CHARTS
Keys does not
work
go
Check whether CON203
20pin cable broken or
loss
Check whether have
+5V_STB and
+3.3V_STB
No
Yes
Replace or reconnect
key cable
Yes
Replace key board
Check DC/DC(U456)
and LDO U455 circuit
No
KEYS DOES NOT WORK
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