Commodore 1084S-P1 - Dynamic Convergence Adjustment

2.3 Dynamicconvergence
Remark:
The dynamic convergence is achieved by tilting the
deflection unit vertically and horizontally. In order to fix
the deflection unit in the right position, three rubber
wedges are fitted between the glass of the picture tube
cone and the deflection unit, as shown in fig. 4d or 5d. °
Two wedge thicknesses are available, one 7 mm thick,
code number 4822 462 40356 and the other 11 mm thick,
code number 4822 462 40357.
- First check the colour purity and the static
convergence.
— Apply a cross—hatch pattern and switch off the green
gun by disconnecting resistor 3122.
- Eliminate the crossing of the central horizontal blue
and red line and the crossing of the central vertical
blue and red line by vertically tilting the deflection unit.
If the deflection unit is in the correct position, then
place rubber wedge , without removing the paper
strip, at the top (figure 4a) or at the bottom (figure 5a).
6-8
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Fig. 4b
Fig. 4a
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10848S-P1 SERVICE MANUAL
Figure 4a applies when the unit is tilted upwards and
figure 5a applies when the unit is tilted downwards. .
Through the horizontal tilting of the deflection unit, a
both the horizontal blue and red lines in the upper and
lower halves of the picture and the vertical blue and
red lines on the left and right-hand side of the picture
are placed on top of each other.
If the deflection unit_is in the correct position, then
place the wedges and , remove the paper
strips and formly press the adhesive side of these
wedges against the glass of the picture tubes as
shown in figure 4b or 5b.
Now place wedge as shown in figure 4c or
5c,remove the paper strip and firmly press the
adhesive side of this wedge against the glass of the
picture tube cone.
Remove wedge so that the situation according to
figure 4d or 5d arises.
Switch on the green gun by connecting resistor 3122
back to its original position.
Fig. 4c Fig. 4d
Fig. 5c
Fig. 5d