5 Troubleshooting
5-18 PG17**/PG19**/PG21**
Improved focus?
Check focus leads from FBT
to CRT Socket.
Check the CRT Socket.
No
Aging monitor and check for focus
change.
Yes
Is dynamic focus circuit 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
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