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10
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13
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10.5 DISPLAY TEST POINTS
NOTE
Refer to Section 5.6 for microprocessor and display diagnostic procedures
Test Point
Pin
Color
Description
TP14
Pin 1
Black
+12 Vdc for Display backlighting and indicator LED s
TP13
Pin 2
White
Ground for Backlighting and indicator LEDs
TP13
Pin 3
Red
Ground for Backlighting and indicator LEDs
TP12
Pin 4
Green
+5 Vdc for Display processor and LCD
TP11
Pin 5
Brown
Display ground
TP10
Pin 6
Orange
TX the serial communications from the control to the display
TP9
Pin 7
Blue
RX the serial communications from the display to the control
TP8
Pin 8
Yellow
Display ground
VOLTAGE TESTS:
Negative Test Lead
Positive Test Lead
Voltage Reading
TP13
TP14
12
TP13
TP12
5
TP13
TP11
0
TP13
TP8
0
TP11
TP14
12
TP11
TP8
0
TP8
TP14
12
10.6 WIRING SCHEMATICS
The wiring schematics are provided on the following pages.