Panasonic PT-56DLX25 Service Manual page 62

PT-56DLX75 / PT-61DLX75
TIPS FOR DETERMINING WHICH C.B.A. IS DEFECTIVE
TV UNIT
REAR JACK C.B.A.
P3501
COMPONENT IN (1,2,3)
VIDEO IN (1,2)
S-VIDEO IN (1,2)
FRONT JACK C.B.A.
(CIRCUIT BOARD FJ)
P3902
VIDEO IN 3
S-VIDEO IN 3
P3901
RGB IN
DIGITAL TUNER C.B.A. (CIRCUIT BOARD DT)
TUNER
CARD C.B.A.
P9005 P9003 DT10
SD
CARD
Display the internal pattern for "DDP" in Factory Adjust Mode.
Refer to "HOW TO DISPLAY THE INTERNAL PATTERN"
as shown in Figure A.
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.
BASE C.B.A. (CIRCUIT BOARD A) MAIN C.B.A. (CIRCUIT BOARD DG)
IC3001 IC4258
PA15 PA16 PDG1 MAIN
VIDEO
SIGNAL
PROCESS
VIDEO
SW
IC4257
SUB
PA9
VIDEO
SIGNAL
PROCESS
PA12
DT12 PDG2
IC8211,8216, IC8221, IC8240, ETC
DTV SIGNAL PROCESS
/SD CARD
SIGNAL PROCESS
OPTICAL BLOCK UNIT
DMD DRIVE C.B.A. (CIRCUIT BOARD L)
IC4265 IC5950
PDG4 PL1
VIDEO
LVDS
SIGNAL
TRANS.
PROCESS
INTERNAL
CW INDEX
DELAY
PATTERN
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.
If the internal pattern is OK, it can be judged that the circuit
on the back end of IC4265 is normal.
60
IC6001 IC6004 IC6012
DMD
LVDS DMD
RECEIVER CONTROL
INTERNAL
DDP
PATTERN
COLOR WHEEL
UNIT