JBL CINEMA BASE (serv.man2) Service Manual ▷ View online
NO POWER
SUPPLY
go
Check main
boardwhether have
22V on CON450
Yes
No
Check power board
whether have 22V on
CON2
Yes
Replace power
Replace DC
No
NO POWER SUPPLY
Check whether have
+5V_STB
Yes
Replace power
board
Replace DC
cable
No
Check DC/DC(U456)
circuit
Check whether have
+3.3V_STB
Yes
Replace key board
cable
No
Check LDO U455
Yes
JBL CINEMA BASE TROUBLESHOOTING CHARTS.
Keys does not
work
go
Check whether CON203
20pin cable broken or
loss
Yes
Replace or reconnect
key cable
KEYS DOES NOT WORK
Check whether have
+5V_STB and
+3.3V_STB
No
Yes
Replace key board
Check DC/DC(U456)
and LDO U455 circuit
No
Remote
control does
not work
go
Check whether battery
of remote control is
exhausted
Yes
Replace battery
REMOTE CONTROL DOES NOT WORK
Check whether have
+3.3V_STB and IR signal
on CON203
No
Yes
Replace EQ board
Check LDO U455 circuit
and IR_IN connection
on main board
No
Click on the first or last page to see other CINEMA BASE (serv.man2) service manuals if exist.