5 Troubleshooting
720C/920C
5-13
5-2 General Troubleshooting
5-2-1 No Picture
LED blinks?
LED is green color?
After restart monitor LED
doesn't
come on, repair power circuit.
Check signal cable.
Check G2 voltage, high voltage,
R, G, B cathode voltage.
Yes
No
No
LED is Amber color?
No
Yes
5-2-2 Shut down
Yes
5-2-2 Shut Down
Blinking LED’s?
Scan failure
Check horizontal, vertical deflection
system and check power supply
secondary voltages.
No
Yes
Yes
Check power supply.
No
High voltage failure?
Check high voltage system.
Check and replace IC201.
Done
No
Yes
Video failure?
Check Video board.
No
Yes
Summary of Contents for 720C
Page 33: ...720C 920C 6 1 6 1 720C Exploded View and Parts List ...
Page 34: ...720C 920C 6 2 6 2 920C Exploded View and Parts Lists ...
Page 80: ...R299 720C 920C 10 2 10 2 MICOM Parts Schematic Diagram ...
Page 81: ...720C 920C 10 3 10 3 Horizontal Vertical Processor Parts Schematic Diagram R265 C272 R262 ...
Page 83: ...R561 R562 R501 C530 L521 R523 R526 720C 920C 10 5 10 5 High Voltage Parts Schematic Diagram ...
Page 84: ...720C 10 6 1 10 6 1 720C Video Parts Schematic Diagram ...