Panasonic PT56DLX75 - 56" DLP TV, Manual, Page: 106 / 107

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Display the internal pattern for "DDP" in Factory Adjust Mode.
Refer to "HOW TO DISPLAY THE INTERNAL PATTERN"
as shown in Figure A.
If the internal pattern is OK, it can be judged that the circuit on
the back end of IC6004 (The Optical Block Unit is OK) is OK.
Display the internal pattern for "CW INDEX DELAY"
in Factory Adjust Mode.
Refer to "HOW TO DISPLAY THE INTERNAL PATTERN"
as shown in Figure A.
If the internal pattern is OK, it can be judged that the circuit
on the back end of IC4265 is normal.
TIPS FOR DETERMINING WHICH C.B.A. IS DEFECTIVE
IC4265 IC4258
IC4257
IC5950 IC6001
PL1
PDG1 PA16
PDG4
DMD DRIVE C.B.A. (CIRCUIT BOARD L)
OPTICAL BLOCK UNIT
COLOR WHEEL
UNIT
MAIN C.B.A. (CIRCUIT BOARD DG) BASE C.B.A. (CIRCUIT BOARD A) REAR JACK C.B.A.
DIGITAL TUNER C.B.A. (CIRCUIT BOARD DT)
IC6004 IC6012
LVDS
TRANS.
VIDEO
SIGNAL
PROCESS
LVDS
RECEIVER DMD
CONTROL
INTERNAL
DDP
PATTERN
DMD
MAIN
VIDEO
SIGNAL
PROCESS
IC3001
VIDEO
SW
IC8211,8216, IC8221, IC8240, ETC
SUB
VIDEO
SIGNAL
PROCESS
DTV SIGNAL PROCESS
/SD CARD
SIGNAL PROCESS
SD
CARD
TUNER
INTERNAL
CW INDEX
DELAY
PATTERN
PA15
COMPONENT IN (1,2,3)
VIDEO IN (1,2)
S-VIDEO IN (1,2)
VIDEO IN 3
S-VIDEO IN 3
RGB IN
P3501
FRONT JACK C.B.A.
(CIRCUIT BOARD FJ)
PA9
P3902
CARD C.B.A.
P9003
PA12 P3901
PDG2
P9005
DT12
DT10
TV UNIT