Adjusting The Terminal Display - Wyse WY-60 Maintenance Manual

Note--If
you finish both the power and display adjustments, and
the display is still not. within tolerance, see Chapter
3,
"Troubleshooting."
ADJUSTING THE TERMINAL DISPLAY
This section contains detailed instructions for each adjustment
mentioned in Table
4-1 and a cross reference for the test pattern
that you should use when making that particular adjustment. See
Figure 4-2 to identify adjustment locations on the terminal PCB.
The order in which we have listed adjustments in this section
corresponds to the order of full alignments listed in Table
4-1.
To perform a full alignment, make all adjustments in the order
that follows.
Figure 4-2 Adjustment Locations
L202
~~
VR204
Vertical Hold
On certain early units the vertical hold adjustment is labeled
VR301 on the terminal PCB. On most units, VR301 is replaced with
a fixed resistor. If you can adjust vertical hold, use display
test pattern O.
Adjust VR301 until the display is steady and doesn't roll.
4-10