-43-
Troubleshooting
No Picture
No picture with all of
input sources
Check signal processing stage and LCD driving stage;
Check RGB S&H signals at test points TP501B, TP502B, TP503G,
TP504G, TP505R, TP506R.
Check PSIG signals at test points TP3501 and TP3531.
Check power supply circuit 15.5V SWD and peripheral circuit.
Check ICs IC501, IC531, IC561, IC1501, IC1531, IC1561, IC3501,
IC3531, IC401, IC301 and peripheral circuits.
Check DVI interface stage;
Check DVI receiver, IC8001, buffer ICs IC8051, IC8061, IC8071 and
peripheral circuit.
DVI switch signal, DPC_ON (DVI: L), is output from pin 15 of IC1804
and applied to IC5331 through Q5331.
No picture with PC1[DVI
digital] input source
No picture with PC1 [DVI
analog] input source
Check PC source selecting stage;
Check IC3061, RGB buffer, and peripheral circuit on the DVI board.
Check IC1201, PC1/PC2 RGB SW, and IC5311, PC1/PC2 SYNC-SW
and peripheral circuit.
PC1/PC2_SW5 signal (PC1: L) is applied on pin 22 of IC1201, and pins
9, 11 of IC5311, and output from pin 16 of IC1813 through IC1351,
buffer IC.
Check PC source selecting stage;
Check IC221, Sync sw, and peripheral circuit on the AV board. Check
MNTOUT_SW5 signal (PC2-Monitor-Out:H) is applied on pin 1 of
IC201 and pins 9, 10, 11 of IC221 on the AV board and output from
pin17 of IC1813 through IC1351, buffer IC.
Check IC3101, Video decoder, and IC7201, matrix and peripheral cir-
cuit.
Check IC1201, PC1/PC2 RGB SW, and IC5311, PC1/PC2 SYNC-SW
and peripheral circuit.
PC1/PC2_SW5 signal (PC1: L) is applied on pin 22 of IC1201, and pins
9, 11 of IC5311, and output from pin 16 of IC1813 through IC1351,
buffer IC.
No picture with PC2 [VGA
analog] input source
Check PC/AV source selecting stage and processing stage;
Check IC5201, PC/AV RGB SW, and IC8201, A/D conversion and
peripheral circuit.
Check IC5321, IC5331, PC/AV Sync selection IC, and peripheral cir-
cuit.
PC/AV_SW5 signal (PC: H) is applied on pin 26 of IC5201, pin 2 of
IC5321, and pin 10 of IC5331, and output from pin 16 of IC1804
through IC1351, buffer IC.
No picture with all of
computer input sources
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Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
Check following steps.
Summary of Contents for PLC-SU25
Page 50: ... 50 IC Block Diagrams AD8075 Selector IC201 AD8183ARU Selector IC1201 AN7513 Audio Amp IC5001 ...
Page 51: ... 51 AN5870SB RGB SW IC5201 IC Block Diagrams AD9884AKS A D IC8201 ...
Page 54: ... 54 IC Block Diagrams CXD3526GG LCD Driver Timing Generator IC401 FA5502 P F Control IC611 ...
Page 55: ... 55 LA7217 Sync Separator IC5361 M62392 D A IC3561 IC Block Diagrams ...
Page 56: ... 56 NJM2284M Switch IC2101 IC Block Diagrams M62393 D A IC281 IC7801 ...
Page 82: ...MB3 SU4000 MB3 SU2500 82 46 44 44 46 44 44 Mechanical Parts List 46 57 56 46 46 Optical PARTS ...
Page 83: ...MB3 SU4000 MB3 SU2500 83 44 44 54 67 Red 68 Green 69 Blue 44 44 44 Mechanical Parts List ...
Page 85: ...MB3 SU4000 MB3 SU2500 85 52 a 52 45 45 45 45 52 Mechanical Parts List ...
Page 86: ...MB3 SU4000 MB3 SU2500 86 Mechanical Parts List 58 70 63 71 57 60 65 59 64 66 51 55 62 ...
Page 88: ... MB3A Jan 2003 BB 400 Printed in Japan SANYO Electric Co Ltd ...
Page 92: ...Diagrams Drawings MB3A ...
