SAMSUNG 551 56
Instrukcja Serwisowa

5 Troubleshooting

CONFIDENTIAL

5-2-7 Poor Focus
Adjust focus VR of FBT.

Improved focus?

Yes

Aging monitor and check for focus change.

No Check focus leads from FBT to CRT Socket.

Check the CRT Socket.

(Toshiba CRT)

Dynamic focus circuit is right?

No

Refer to 5-1-14 Dynamic Focus Failure.

(SDI CRT)

Yes

Replace the CRT and verify focus.

5-2-8 Purity Failure
Degaussing

Purity is right?

Yes

Done

No Degaussing circuit is right? No Refer to 5-1-19 Degaussing Failure.

Yes Replace CRT and verify purity.

5-18

AN15V*