Purity Failure - LG Flatron T710BH Service Manual

Check white balance adjustment.
G2 voltage is right?
YES
Blank pedestal is on
Pin 19, 20 and 21 of IC302
YES
Is V_FLB and DC_bias on
G1 Pin at CRT socket?
YES
Done.
Degaussing
Purity is right?
NO
Degaussing circuit is right?
YES
Replace CRT and verify purity.
22. Visible Retrace
NO
NO
NO

23. Purity Failure

YES
NO
- 32 -
Check G2 control volume and FBT.
Check IC302
and related components.
Check Q799
and related components.
Done.
Refer to 6 NO Degaussing.