Panasonic PT-EZ770T

INF-34
SECTION 1 SERVICE INFORMATION
■ No picture or abnormal picture is output
Conrmeachcableconnection
Connect the cables securely
Confirm the below with a signal other than all black pattern.
No picture with VIDEO input Followthesection"VIDEOinputcheck"
NopicturewithRGB1input
Followthesection"RGB1inputcheck"
NopicturewithRGB2input
Followthesection"RGB2inputcheck"
No picture with DVI-D input
Followthesection"DVI-Dinputcheck"
No picture with HDMI input
Followthesection"HDMIinputcheck"
NopicturewithDIGITALLINKinput
Followthesection"DIGITALLINKinputcheck"
No picture with DisplayPort input
Followthesection"DisplayPortinputcheck"
No picture with all of inputs
A
Check each power supply voltage of microprocessor & resize
IC(IC1102),FPGA(IC1103),LCDIC(IC1104),paneldriver
IC(IC1105-IC1107)
NG
A
Check IC1110, IC1045 - IC1049, IC1052, IC1066 - IC1068,
IC1075 - IC1077 and peripheral circuits
A
Checkthewaveform(LDVSoutputclock)atR2502,R2508of
IC1103(FPGA)
NG
A CheckIC1103(FPGA)andperipheralcircuit
A
Check the waveform at IC1105 - IC1107(SH IC)
R2387-R2392•R2405-R2410(R)
R2393-R2398•R2411-R2416(G)
R2399-R2404•R2417-R2422(B)
NG
A Check IC115 - IC1107 (SH IC) and peripheral circuit
A
Checkthewaveform(LDVSoutputclock)atR1798,R1803of
IC1102(Resize&Micon)
NG
A Replace[A]P.C.Board
A Checkthewaveform(HSYNC)atR2332ofIC1104(LCDIC)
NG
A Check IC1104(LCD IC) and peripheral circuit
A Check the connection of connectors [A30], [A31], [A33]
NG
A Connect the connectors securely
A Replace[A]P.C.Board
(3)
OK
OK
OK
OK
OK
OK
OK