Sony KV-28DS60U Service Manual page 27

Layout of each control
Note : If you are unable to adjust the corner convergence
properly, this can be corrected with the use of
permalloys.
a
a-d: screen-corner
convergence defect
c
Permalloy Assy
X-4387-214-1
Convergence adjustment with permalloy
Purity magnet
BMC (Hexaploe) magnet
V STAT convergence magnet
Y-splitting axis correction magnet
b
d
27
3-3. FOCUS
1. Receive a television broadcast signal.
2. Normalize the picture setting.
3. Adjust the focus control located on the flyback transformer to
obtain the best focus at the centre of the screen.
Bring only the centre area of the screen into focus, the
magenta-ring appears on the screen. In this case, adjust the
focus to optimize the screen uniformly.
3-4. SCREEN (G2), WHITE BALANCE
[Adjustment in the service mode using the remote
commander]
G2 adjustment (RV701)
1. Input a dot signal from the pattern generator.
2. Set the Picture, Brightness and Colour to minimum.
3. Apply 170V DC from an external power supply to the
R, G and B cathodes of the CRT.
4. Whilst watching the picture, adjust RV701 [SCREEN] located
on the C Board to the point just before the flyback return lines
disappear.
FOCUS