Panasonic PT-50LCZ70 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
PEAKS
IC8201
INTERNAL
EEPROM
PATTERN
FOR GC-CHK
IC8802
DEMODU.
IC7101
DIGITAL
SIGNAL
IC5510
PROCESS
IC5503
HDMI SW HDMI I/F
/EQL /AD CONV.
PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7
DRIVE P.C.B.
Circuit shown in dark gray
IC7119
CN7001 CN2901
I/P
LVDS
CONVERTER
TRANS.
OSD MIX
PICTURE
CONTROL
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
IC2501
INTERNAL
PATTERN
LCD/PRISM UNIT
IC2901
FOR LCD-CHK
CN2001
LVDS
REC.
CN2101
LCD
VIDEO
IC2902 PROCESS
CN2201
LVDS
REC.