Sharp C-1020G Serviceanleitung Seite 8

STATIC (CENTRE) CONVERGENCE ADJUSTMENT
proper insertion and positioning of three rubber wedges
1. Switch the Receiver ON and allow it to warm up for 15 between the edges of the deflection yoke and the funnel of
minutes. the CRT.
2. Connect the output of a Crosshatch Generator to the This is accomplished in the following manner.
Receiver and, concentrating on the centre of the CRT 1. Switch receiver ON and allow it to warm up for 15
screen, proceed as follows: minutes. ;
a. Locate the pair of 4 pole magnet rings. Rotate indi- 2. Apply crosshatch pattern from Dot/Bar Generator to
vidual rings (change spacing between tabs) to receiver. Observe spacing between lines around edges of
converge the vertical red and blue lines. Rotate the CRT screen.
pair of rings (inaintaining spacing between tabs) to 3. Tilt the deflection yoke up and down, and insert tilt
converge the horizontal red and blue lines. adjustment wedges) and@) between the deflection
b. After completing red and blue centre convergence, yoke and the CRT until the mis-convergence illustrated
locate the pair of 6 pole magnet rings. Rotate in Figure 2 @ has been corrected.
individual rings (change spacing between tabs) to 4. Tilt the deflection yoke right and left, and insert tilt
converge the vertical red and blue (magenta) and adjustment wedge @) between the deflection yoke and
green lines. Rotate the pair of rings (maintaining the CRT until the mis-convergence illustrated in Figure
spacing between tabs) to converge the horizontal red 2 ® has been corrected.
and blue (magenta) and green lines. 5. Alternately change spacing between, and depth of in-
sertion of, the three wedges until proper dynamic con-
vergence is obtained.
DYNAMIC CONVERGENCE ADJUSTMENT 6. Use a strong adhesive tape to firmly secure each of the
Dynamic convergence (convergence of the three colour three rubber wedges to the funnel of the CRT.
fields at the edges of the CRT screen) is accomplished by 7. Check purity and readjust, if necessary.
WEDGE (2)
DEFLECTION YOKE REAR VIEW
Figure 2, Dynamic Convergence Adjustment