Panasonic PT-56LCX70 Service Manual page 31

Tips for determining defective circuit in case of picture problem
REAR JACK P.C.B. MAIN P.C.B.
CN3501 CN3001
COMPONENT IN 1,2
VIDEO IN 1,2
S-VIDEO IN
FRONT JACK/OPERATION P.C.B.
CN6701 CN3502
VIDEO IN 3
TUNER P.C.B.
TUNER
CN8970 CN8801 CN3001 CN3501
PC-IN
SD/HDMI P.C.B.
HDMI-IN 1
HDMI-IN 2
IC9801
CN9804 CN5503
HDMI-IN 3
EQL
CN9802 CN8201
SD
CARD
Display the internal pattern for "LCD-CHK" in Service Adjust
Mode.
Refer to "HOW TO DISPLAY THE INTERNAL PATTERN FOR
LCD-CHK" as shown in Figure A.
Display the internal pattern for "GC-CHK" in Service Adjust
Mode.
Refer to "HOW TO DISPLAY THE INTERNAL PATTERN FOR
GC-CHK" as shown in Figure B.
IC3001
VIDEO
Circuit shown in gray
SW
IC8001
IC8201
EEPROM
IC8802
DEMODU.
IC5510
IC5503
HDMI SW HDMI I/F
/EQL /AD CONV.
PT-56LCX70 / PT-61LCX70 / PT-50LCX7 / PT-56LCX7 / PT-61LCX7
Circuit shown in dark gray
PEAKS
INTERNAL
PATTERN
FOR GC-CHK
IC2501
INTERNAL
PATTERN
FOR LCD-CHK
DIGITAL
SIGNAL
PROCESS
COLOR
COORECTION
If the internal pattern is OK, the circuit shown in dark gray
can be judged OK.
If the internal pattern is OK, the circuit shown in gray can
be judged OK.
31
LCD/PRISM UNIT
IC2001
CN2001
S/H
IC2002
CN2002
S/H
IC2003
CN2003
S/H