5 Troubleshooting
5-18
CF21M*
Improved focus?
Check focus leads from
FBT to CRT Socket.
Check the CRT Socket.
No
Aging monitor and
check for focus change.
Yes
Dynamic focus circuit is right?
Refer to 5-1-15 Dynamic
Focus Failure.
Replace the CRT and verify focus.
Yes
No
Adjust focus VR.
5-2-7 Poor Focus
5-2-8 Purity Failure
Purity is right?
Degaussing circuit is right?
Refer to 5-1-20 Degaussing Failure.
Replace CRT and verify purity.
Yes
No
No
Done.
Yes
Degaussing
Summary of Contents for CF21M
Page 7: ...CF21M 6 1 6 Exploded View and Parts List ...
Page 17: ...10 Schematic Diagrams 10 6 CF21M 1 368 V IC601 1 ...
Page 19: ...10 Schematic Diagrams 10 8 CF21M 19 IC103 5 24 15 CRT Socket Red Green Blue 20 R G B Video ...
Page 21: ...10 Schematic Diagrams 10 10 CF21M Memo ...
Page 22: ...Memo 9 Wiring Diagram 9 2 CF21M ...
Page 23: ...Memo 8 Block Diagrams 8 2 CF21M ...
Page 48: ...Memo 7 Electrical Parts List 7 26 CF21M ...
Page 49: ...7 Electrical Parts List CF21M 7 27 Loc No Code No Description Specification Remarks ...
