Panasonic PT-EZ770Z Service Manual page 42

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