JBL CINEMA BASE (serv.man2) Service Manual ▷ View online
NO AUDIO OUTPUT
NO AUDIO
OUTPUT
go
Check whether have
PVCC on main board
PVCC on main board
Yes
No
Check whether have
22V
Replace power
board
Replace U451
No
Yes
Check whether
U253(CS42528) output
signal
Yes
Yes
Replace TPA3116
Check whether have
SCLK, LRCK,DATA from
U251(CS48L11)
No
board
Replace
U253(CS42528)
Yes
Check the voltage of
U251 or replace it
No
AUX IN DOES NOT WORK
AUX IN DOES
NOT WORK
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Check whether have
+5V_A on pin8 of
U350,U351
Yes
No
Check whether main
board or J352 cable
well connection
Check whether there is
signal on pin5 of
U350,U351
Yes
No
Replace J351
Check whether there is
signal on pin1 of
U350,U351
Yes
Yes
Replace U350,U351
No
OPTICAL IN DOES NOT WORK
OPTICAL IN
DOES NOT
WORK
go
Check whether have
3V3_STB on pin1 of
J350
Yes
No
Check whether main
board or CON650 cable
well connection
Check whether there is
signal on pin3 of J350
Yes
No
Replace J350
Yes
JBL CINEMA BASE.
RESET TO FACTORY DEFAULTS, PROCEDURE.
• With Cinema Base ON: Press “Surround” and “VOL –” keys simultaneously
• Once factory defaults are restored, the Cinema Base source LED (Amber color) lights for 1s, then
the power LED goes off and on.
• Cinema Base is now reset.
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