CONFIDENTIAL
5 Troubleshooting
CF21G*
5-17
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 5-1-16 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 5-1-21 Degaussing Failure.
Replace CRT and verify purity.
Yes
No
No
Done.
Yes
Degaussing
Summary of Contents for CF21G Series
Page 32: ...CONFIDENTIAL CF21G 6 1 6 Exploded View and Parts List ...
Page 33: ...Memo 6 Exploded View Parts List 6 2 CF21G CONFIDENTIAL ...
Page 61: ...CONFIDENTIAL Memo 8 Block Diagrams 8 2 CF21G ...
Page 63: ...Memo 9 Wiring Diagram 9 2 CF21G CONFIDENTIAL ...
Page 65: ...CONFIDENTIAL 10 Schematic Diagrams 10 2 CF21G 1 368 V IC601 1 ...