Touch Control Alignment And Checkout; Logic Board Dip Switch S101 - Zenith ZVM-133-TC Service Manual

Touch Control Alignment
and Checkout
The touch grid displayed is for the 32 x 32 (aIiLEDs
strobed) Monitor mode. This requires the 595-4177
(30-1166) plastic touch grid which has a 16 x 16
square pattern in a 7.5" x 7.5" area. Switch 5 of Logic
Board switch S101 is factory set to on (32 x 32 mode).
LOGIC BOARD DIP SWITCH S101
These switches are initially set for 4800 baud rate,
no parity, and a 32 x 32 mode (matrix). See Figure
4-23 for the location of S1 01.
Switch positions
=
0 for ON and 1 for OFF.
FUNCTION
BAUD
RATE
PARITY
MODE
(MATRIX)
TEST
Page 4-14
ON is down (toward the board).
OFF is up (away from the board).
Table 4-3
S101 Settings
SWITCH POSITIONS
2
3
4 5 6
110
ON
ON ON
150
OFF ON ON
300
ON OFF ON
600
OFF OFF ON
1200
ON ON OFF
2400
OFF ON OFF
4800
ON OFF OFF
9600
OFF OFF OFF
Zero parity and 8 bits
ON
Even parity and 7 bits
OFF
32
x
32
ON
Normal ON
Test OFF
NOTE: This procedure requires the PLATO Diagnostic
program in a Z-150 PC Series or Z-160 PC Series
computer with a Z-319 video card installed. The CB-
5063-28 Diagnostic Package also can be used to dis-
play the Touch Grid (except for early diagnostic pack-
ages).
NOTE:The object of this alignment is to achieve proper
response of the touch control when anyone of the
squares of the displayed grid is touched. The plastiC
grid is used for coarse alignment and the displayed
grid may be different at the completion of alignment.
Proper response is indicated by an alternating display
of 0 and X in the square touched with changes to only
adjacent squares allowable.
1. Use tape to attach the plastiC grid (30-1166) to
the screen, aligning it with the the small dots at
the centers of the top, bottom, left, and right sides
of the CRT (see Figures 4-5 and 4-6).
2. Connect the computer and the ZVM-133-TC moni-
tor as shown in Figure 1-2 and turn power on for
both units.
3. Install the PLATO Diagnostic disk which will auto-
matically boot.
4. Display the PLATO Touch Grid.
5. Adjust the horizontal center so that the displayed
grid is centered with the plastiC grid.
6. Adjust the horizontal width so that the right and
left sides of the displayed grid conform to the plas-
tic grid.
7. Repeat steps 3 and 4 as necessary, to get the
displayed and plastiC grids to conform horizontally.
8. Adjust vertical centering so that the displayed grid
is centered with the plastiC grid.
Servicing