Panasonic PT-56DLX25 Service Manual page 60

PT-56DLX75 / PT-61DLX75
HOW TO DETERMINE WHICH C.B.A. IS DEFECTIVE
No picture or abnormal picture
(Only Video1,2 OR 4 input is NG.)
(Only Video3 input is NG.)
(Only tuner input is NG.)
(Only PC input is NG.)
(Only Component 2 OR 4 input is NG.)
(Component 2 AND 4 input are NG.)
(Analog Tuner, Component AND Video input are NG.)
(Digital Tuner/SD Card input is NG.)
(All inputs are NG.)
ABNORMAL PICTURE:
No Picture Color (Black and White picture)
Abnormal Picture Color
Unsynchronized Picture
Dark Picture
Replace the TV Unit
(Rear Jack C.B.A. or Base C.B.A.
(Circuit Board A)).
Replace the TV Unit
(Front Jack C.B.A. (Circuit Board FJ)
or Base C.B.A. (Circuit Board A)).
Replace the TV Unit
(Tuner C.B.A. (Circuit Board AT)
or Base C.B.A. (Circuit Board A)).
Replace the TV Unit
(Front Jack C.B.A. (Circuit Board FJ)
or Base C.B.A. (Circuit Board A)).
Replace the TV Unit
(Rear Jack C.B.A.).
Replace the TV Unit
(Main C.B.A. (Circuit Board DG)
or Rear Jack C.B.A.).
Replace the TV Unit
(Base C.B.A. (Circuit Board A)).
Replace the Digital Tuner C.B.A.
(Circuit Board DT) or TV Unit
(Main C.B.A. (Circuit Board DG)).
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.
58
In the case that one
or some inputs are NG,
it can be judged that the
Optical Block Unit is OK.