Sony TRINITRON KV-28HX15B Service Manual page 19

Geometry Adjustment.
Preparation:
Before starting this adjustment, adjust the horizontal and
vertical static convergence.
1. Remove the deflection yoke spacer.
2. Tilt the deflection yoke as indicated in the figure below and
optimise the geometry.
Tilting the DY Up and Down a small amount will balance
the upper and lower pin adjustment.
3. Re-install the deflection yoke spacers. Ensure 4 DY spacers are
reinserted
Tilt Direction
4. The H-Trap and T-B Pin may not achieve a good level due
to a small tilt allowance on the square DY. Keep the DY in
a straight position and adjust H-Trap pot (See diagram for
HTIL Adjustment) and Y-Mg for T-B Pin, as below.
HTIL Adjustment
Deflection Yoke
H-Trap YCH TLV
TLH Piece
28"
HTIL correction can be performed by adding one TLH
correction assembly to the Deflection yoke.
• APH Convergence parameter is electrically controlled. For this
reason a TLH piece may not be required.
(APH = Red vertical lines on the edge of the screen).
All manuals and user guides at all-guides.com
Deflection Yoke
TLV YCH
H-Trap
TLH Piece
32"
- 19 -
YCH Adjustment
YCH VR 28" YCH VR 32"
+
+ + + + +
Deflection Yoke Deflection Yoke
TLV Adjustment
TLV VR 28" TLV VR 32"
+
+ + + + +
Deflection Yoke
Deflection Yoke
Screen Corner Convergence
If you are unable to adjust the corner convergence properly,
this can be corrected with the use of permalloy magnets.
a
a-d: screen-corner
convergence defect
c
Install the permalloy assembly
for the area that needs correcting.
b
Permalloy Assy
X-4387-214-1
d
Convergence adjustment with permalloy
b
d
a
APH circuit
harness
c