Panasonic PT56DLX75 - 56" DLP TV, Manual, Page: 104 / 107

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No picture or abnormal picture
(Only Video1,2 OR 4 input is NG.)
(Analog Tuner, Component AND Video input are NG.)
Replace the TV Unit
(Rear Jack C.B.A. or Base C.B.A.
(Circuit Board A)).
Replace the TV Unit
(Rear Jack C.B.A.).
Replace the TV Unit
(Base C.B.A. (Circuit Board A)).
(Only tuner input is NG.)
Replace the TV Unit
(Tuner C.B.A. (Circuit Board AT)
or Base C.B.A. (Circuit Board A)).
In the case that one
or some inputs are NG,
it can be judged that the
Optical Block Unit is OK.
(Only Component 2 OR 4 input is NG.)
(Only Video3 input is NG.)
Replace the TV Unit
(Front Jack C.B.A. (Circuit Board FJ)
or Base C.B.A. (Circuit Board A)).
(Only PC input is NG.)
Replace the TV Unit
(Front Jack C.B.A. (Circuit Board FJ)
or Base C.B.A. (Circuit Board A)).
(Digital Tuner/SD Card input is NG.)
(All inputs are NG.)
Replace the TV Unit
(Main C.B.A. (Circuit Board DG)
or Rear Jack C.B.A.).
(Component 2 AND 4 input are NG.)
Replace the Digital Tuner C.B.A.
(Circuit Board DT) or TV Unit
(Main C.B.A. (Circuit Board DG)).
ABNORMAL PICTURE:
No Picture Color (Black and White picture)
Abnormal Picture Color
Unsynchronized Picture
Dark Picture
HOW TO DETERMINE WHICH C.B.A. IS DEFECTIVE
Replace the Digital Tuner C.B.A.
(Circuit Board DT),
or TV Unit (Circuit Board DG)
or Optical Block Unit (DMD Drive
C.B.A. (Circuit Board L)
or Color Wheel Unit.