Panasonic PT-56LCX66, Service Manual, Page: 30 / 83

No sound from built-in both L-CH and
R-CH Speakers
Replace the TV Unit (Base P.C.B.).
Replace the TV Unit (Base P.C.B.).
(All input are NG.)
Check that there is an audio signal to the Audio Out
Terminal from all input terminals.
(Only HDMI input is NG.)
No sound from built-in L-CH Speaker only
Press MENU key on the remote and select
"Audio" in MENU screen. Then press "OK."
Replace the L-CH Speaker.
Does the "BALANCE" screen becomes center position?
Set to the center position.
Swap the Speaker Connectors
to confirm the Speaker failure.
Replace the TV Unit (Base P.C.B.).
NO
Still NG
NO
YES
Replace the R-CH Speaker.
Does the "BALANCE" screen becomes center position?
Set to the center position.
Swap the Speaker Connectors
to confirm the Speaker failure.
Replace the TV Unit (Base P.C.B.).
NO
Still NG
NO
YES
No sound from built-in R-CH Speaker only
Press MENU key on the remote and select
"Audio" in MENU screen. Then press "OK."
(Only Audio1 OR 2
input is NG.)
(Only Tuner input is NG.)
(Only Audio3 input is NG.)
OK
Replace the TV Unit (Base P.C.B. or Power P.C.B.).
Replace the TV Unit (Base P.C.B. or
Front Jack/Operation P.C.B.).
Replace the TV Unit (Base P.C.B.) or
Digital Tuner P.C.B.
Replace the TV Unit (Base P.C.B. or
Main P.C.B.).
PT-52LCX66 / PT-56LCX66 / PT-61LCX66 / PT-52LCX16 / PT-56LCX16
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