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INF-33
SECTION 1 SERVICE INFORMATION
Previous page
B Confirm the fuse [F9602]
NG
B Replace fuse
B Replace [B] P.C.Board
B
Confirm the voltages between pins of connector [B1] below;
(1) - (3) DC 380V
(4) - (3) DC 18V
NG
B Check or replace [B] P.C.Board
B Confirm the short circuit of Q9611, Q9612, Q9615, Q9602,
Q9603
NG
Replace the shorted parts
P Confirm that the short circuit between pins (4) and (3) of connec-
tor [K9201] (DC 18V is observed in normal)
NG
P Check or replace [P] P.C.Board
OK
OK
OK
OK
INF-34
SECTION 1 SERVICE INFORMATION
■ No picture or abnormal picture is output
Confirm 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 IC1105 - 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
INF-35
SECTION 1 SERVICE INFORMATION
■ VIDEO input check
Check the cable between [A28] and [JK4007]
NG
Replace cable
J
Check the waveform at pin 26 of [JK4007]
NG
J
Replace [J] P.C.Board
A Check IC1102 and peripheral circuits
One of the inputs (DVD-I, HDMI, RGB1, RGB2, DisplayPort,
DIGITAL LINK) can be displayed
NG
(3)
OK
OK
OK
■ RGB1 input check
A Check the sync input waveform at IC1100
Q1024 (HD), Q1022(VD)
NG
A Check Q1022, Q1024 and peripheral circuits
Input (RGB2) can be displayed
NG
A Check IC1005 and IC1006 and peripheral circuit
A
Check the video input waveform at IC1100
C1114(G/Y), C1115(R/Pr), C1116(B/Pb).
Check the output waveform at R1614(Y), R1615(C), R1616(CVBS
NG
A Check C1114, C1115, C1116,R1614(Y), R1615(C),
R1616(CVBS) and peripheral circuit
One of the inputs (DVD-I, ,DIGITAL LINK) can be displayed
NG
A Check IC1100 and peripheral circuits
A Check the output waveform at L1320, L1321, L1322
NG
A Check L1320, L1321, L1322 and peripheral circuit
A Check IC1100 and peripheral circuits
One of the inputs (DVD-I, DisplayPort, VIDEO) can be displayed
NG
(3)
OK
OK
OK
OK
OK
OK
INF-36
SECTION 1 SERVICE INFORMATION
■ DVI-D input check
DisplayPort input can be displayed
NG
A Check IC1016 and peripheral circuits
Check [JK1006] and peripheral circuits
One of the inputs (HDMI, RGB1, RGB2, DIGITAL LINK, VIDEO)
can be displayed
NG
(3)
OK
OK
■ RGB2 input check
A Check the sync input waveform at IC1100
Q1025 (HD), Q1023(VD)
NG
A Check Q1025, Q1023 and peripheral circuits
Input (RGB1) can be displayed
NG
A Check IC1005 and IC1006 and peripheral circuit
A Check the video input waveform at IC1100
C1118(G/Y), C1119(R/Pr), C1120(B/Pb)
NG
A Check C1118, C1119, C1120 and peripheral circuit
One of the inputs (DVD-I, ,DIGITAL LINK) can be displayed
NG
A Check IC1100 and peripheral circuits
A Check the output waveform at L1323, L1324, L1325
NG
A Check L1323, L1324, L1325 and peripheral circuit
A Check IC1100 and peripheral circuits
One of the inputs (DVD-I, DisplayPort, VIDEO) can be displayed
NG
(3)
OK
OK
OK
OK
OK
OK
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