5 Troubleshooting
5-12
720C/920C
RL601 operation is right?
Q630 base input is right?
Check and replace Q630.
No
No
Yes
Check D-Coil, TH601.
Yes
IC201 Pin 40 output is right?
Check and replace IC201.
Check user function key.
Yes
No
R217 and R630 are right?
Replace R217 and R630.
Done
Yes
No
Check degaussing connector.
5-1-20 Degaussing Failure
5-1-19 User Control Failure
IC201 Pins 35 and 36 inputs are
right at each function.
Check and replace function key.
Check and replace IC201.
Done
Yes
No
Check connector Ass’y.
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 ...