SAMSUNG CHB7227L
Instrukcja Serwisowa

7 Troubleshooting

7-2-7 Poor Focus
Adjust focus VR.

Improved focus?

Yes

Aging monitor and check for focus change.

No Check focus leads from FBT to CRT Socket.

Check the CRT Socket.

Is dynamic focus circuit right?

No

Refer to 7-1-15 Dynamic Focus Failure.

Yes Replace the CRT and verify focus.

7-2-8 Purity Failure
Degaussing

Purity is right?

Yes

Done

No Degaussing circuit is right? No Refer to 7-1-20 Degaussing Failure.

Yes Replace CRT and verify purity.

7-18

CHB5**7L/6**7L/7**7L