Sharp 34N-WF5H, Service Manual

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22
34N-WF5H
24 Convergence adjustment (1) Static convergence adjustment
a) Receive the crosshatch pattern signal.
b) Adjust the red and blue colors at the screen center by opening and
closing or moving the 4-pole magnet.
c) Adjust the green and magenta colors at the screen center using the 6-
polemagnet in the same way.
d) Repeat the above steps b) and c) to finely adjust the green, red and
blue colors at the screen center.
(2) Dynamic convergence adjustment
a) YH
Use the YH-VR control on the DY PWB to produce the specified cross-
point. If the nearby PQH (displaced vertical lines at the corners) is out
of spec, readjust it by using the ferrite sheet and or moving the neck.
(Do not move the neck too much, or vertical distortion may be caused
or the vertical linearity will be adversely affected.)
b) YV
Use the YV-VR control on the DY PWB to adjust the horizontal lines at
the top and bottom of the screen to optimum.
(3) Look at the entire screen to see if there is no problem. Finally fix the
wedge and purity magnet assembly with glass tape and lacquer.
(red, blue)
Screen center
2-pole magnet
4-pole magnet
6-pole magnet
Crosshatch pattern
Y axis
(fig. A) (fig. B) (fig. C) (fig. D)
X axis
Y
H
Y
V
X
V
Red Red Red Red Blue Blue Blue Blue
Adjust with the VR1
control. Adjust with the VR2
control.
Deflection yoke
fastening tape
Purity magnet assembly
No. AdjustingPoint Adjusting Procedure