10−13 62-11389
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.
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