Convergence Adjustment - Emerson 20" Color Television 6420FE Service Manual

17. Convergence Adjustment

Purpose: To obtain proper convergence of red, green
and blue beams.
Symptom of Misadjustment: If Convergence Adjust-
ment is incorrect, the edge of white letters may have
color edges.
Test Point Adj. Point
C.P. Magnet
(RB),
--- C.P . Magnet
(RB-G),
Deflection Yoke
Tape M. EQ.
Pattern
---
Generator
Figures
CRT
COIL
SCREW
DY WEDGE
COIL CLAMPER
DEFLECTION YOKE
C.P. MAGNET (RB)
R
G
B
C.B. MAGNET (RB-G)
RB
G
1. Loosen the Ring Lock and align red with blue dots
or Crosshatch at the center of the screen by rotat-
ing (RB) C.P. Magnets. (See Fig. 7)
2. Align red / blue with green dots at the center of the
screen by rotating (RB-G) C.P. Magnet. (See Fig. 8)
3. Paintlock the C.P. Magnets after adjustment.
4. Remove the DY Wedges and slightly tilt the De-
flection Yoke horizontally and vertically to obtain
the best overall convergence.
5. Fix the Deflection Yoke by carefully inserting the
DY Wedges between CRT and Deflection Yoke.
Mode Input
Dot Pattern
--- or
Crosshatch
Spec.
See below.
PURITY RB RB-G
RING LOCK
SCREW
C.P. MAGNET CLAMPER
C.P. MAGNET
Fig. 6
R
G
B
Fig. 7
G
RB
Fig. 8
5-7 L2401EA