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FORM 50.40-OM2
103YORK INTERNATIONAL
DIGITAL INPUTS / OUTPUTS TESTS
This diagnostic is used to analyze the digital inputs and
outputs of the Microboard.
The state of each Microboard Program Jumper and
Program DIP Switch, as interpreted by the Microboard,
is depicted by an LED. If the Microboard interprets its
input as being at a Logic Low (<1.0VDC) level, the
LED is illuminated. If interpreted as being at a Logic
High (>4.0VDC) level, the LED is extinguished.
PROCEDURE
Digital Inputs:
1. The Digital Inputs are listed on this screen
according to Microboard Program Jumpers
and Program DIP Switches. Tables 2 and 3
list the functions of the Program Jumpers and
Switches.
2. If a Program Jumper is present, the applicable
LED should be extinguished. If the LED is not
extinguished, the Microboard is defective.
3. If a Program Jumper is not present, the appli-
cable LED should be illuminated. If the LED is
not illuminated, the Microboard is defective.
4. If a Program Switch (DIP) is in the ON position,
the applicable LED should be illuminated. If
the LED is not illuminated, the Microboard
is defective.
5. If the Program Switch (DIP) is in the OFF posi-
tion, the applicable LED should be extinguished.
If the LED is not extinguished, the Microboard
is defective.
6. When all desired tests have been performed,
press DIAGNOSTICS key to return to MAIN
DIAGNOSTICS Screen.
FIG. 53
00531VIPC
5