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.
Summary of Contents for CF21M
Page 7: ...CF21M 6 1 6 Exploded View and Parts List ...
Page 17: ...10 Schematic Diagrams 10 6 CF21M 1 368 V IC601 1 ...
Page 19: ...10 Schematic Diagrams 10 8 CF21M 19 IC103 5 24 15 CRT Socket Red Green Blue 20 R G B Video ...
Page 21: ...10 Schematic Diagrams 10 10 CF21M Memo ...
Page 22: ...Memo 9 Wiring Diagram 9 2 CF21M ...
Page 23: ...Memo 8 Block Diagrams 8 2 CF21M ...
Page 48: ...Memo 7 Electrical Parts List 7 26 CF21M ...
Page 49: ...7 Electrical Parts List CF21M 7 27 Loc No Code No Description Specification Remarks ...
