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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 TPVIDEOR, TPVIDEOG,
TPVIEOB.
Check power supply circuit 15.5V and peripheral circuit.
Check ICs IC501, IC531, IC561, IC3501, IC3531, IC401, IC301 and
peripheral circuits.
No picture with PC1
[RGB] input source
Check PC source input stage;
Check IC5201<PC1/PC2 RGB-SW> and peripheral circuit on the AV
board.
PC1/PC2_SW signal (PC1: L) is output from pin 19 of IC1804<Output
Expander> and applied to pin 26 of IC5201 through IC5371<Buffer>.
Check PC source input stage;
Check IC5201<PC1/PC2 RGB-SW> and peripheral circuit on the AV
board.
PC1/PC2_SW signal (PC2: H) is output from pin 19 of IC1804<Output
Expander> and applied to pin 26 of IC5201 through IC5371<Buffer>.
Check IC4011<Sync-sw> IC4071 and peripheral circuit.
No picture with PC2
[RGB] input source
Check PC/AV source selecting stage and processing stage;
Check IC5201<PC1/PC2 RGB-SW> and IC201<A/D Conversion> and
peripheral circuit.
PC1/PC2_SW signal (PC2: H) is output from pin 19 of IC1804<Output
Expander> and applied to pin 26 of IC5201 through IC5371<Buffer>.
No picture with all of
computer input sources
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Yes
Yes
Yes
Yes
No
No
No
No
Check following steps.
Summary of Contents for 1 122 280 00
Page 50: ... 50 IC Block Diagrams BA7078AF Sync Detector IC5301 AN5870SB RGB SW G_Sync Separator IC5201 ...
Page 51: ... 51 IC Block Diagrams BA9743AFV DC DC Converter IC371 FA5502 P F Control IC621 ...
Page 52: ... 52 IC Block Diagrams LM4889M Audio Amplifier IC5031 PW168A Scaler Main CPU IC301 ...
Page 53: ... 53 IC Block Diagrams NJW1141 Audio Selector IC5001 STR Z2156 Power Switching Control IC631 ...
Page 78: ...MM5 XU4700 78 L2 Prism LCD panel Ass y Mechanical Parts List L2 c L2 a L2 b L2 e L2 d L2 ...
Page 79: ...MM5 XU4700 79 Mechanical Parts List A D D E B C C L19 L13 L5 L8 L18 L11 L1 L3 L7 L12 L6 L14 ...
Page 82: ... MM5A Oct 2004 BB 400 Printed in Japan SANYO Electric Co Ltd ...
Page 86: ...Diagrams Drawings MM5 XU47 ...