Service manual

5 Troubleshooting
CF21M* 5-15
5-2-4 Visible Retrace
G2 voltage is right?
Blank pulse is on Pin 23 of
IC102 (19”: Pin 27 of IC101)
on Video board?
Check CN102, Q104 (19”: Q103).
Yes
Yes
No
Check G2 control volume and FBT.
No
Blank pedestal is on
Pin 25, 28 and 30 of IC102
(19”: 29, 32 and 35 of IC101)?
Check IC102 (19”: IC101)
and related components.
Yes
No
Is V_FLB and DC_bias on
G1 Pin at CRT socket?
Check Q301, CN102 Assy,
Q520, D520, and D521.
Done.
Yes
No
Check white balance adjustment.