Display Test, Procedure | York 00497VIP guide

FORM 50.40-OM2

DISPLAY TEST

FIG. 50	00528VIPC

Each of the Display Diagnostics is accessed from this screen. After each diagnostic is performed, return to this screen, from which the next diagnostic can be selected. Refer to description of Display operation in Section 5 of this book.

PROCEDURE

1.Press the appropriate keypad key to perform the desired test from the list below.

2.Press the CANCEL (X) or ENTER (T) key to terminate test and return to DISPLAY TEST MAIN Screen, from which another test can be selected.

3.When all the desired tests have been performed, press the DIAGNOSTICS key to return to the MAIN DIAGNOSTICS Screen.

•Bit Patterns - This test is used to detect jitter and alignment defects. It verifies proper operation and compatibility of the Microboard Display Controller with the display. Four vertical bars of green, dark blue, light blue and yellow, outlined by a red border are displayed. If the vertical bars are not stable or straight, or the red border is not completely visible, then either the Microboard Program Jumpers are not configured correctly for the installed display or the Microboard Display controller is defective. Refer to Figure 51.

•All Red - This test verifies the operation of all of the red pixels. All of the red pixels are turned on to create a completely red screen. Any red

pixels that do not turn on will appear as black dots on the display. If any black dots appear, first ascertain it is not caused by dirt that is lodged between the display surface and the protective plastic cover. It is normal for a small number of randomly spaced pixels to not illuminate. It is not necessary to replace the display if a small number of black dots appear. They will not be visible on the normal screens displayed outside of this diagnostic mode. However, large black areas would be indicative of a defective display.

•All Green - This test verifies the operation of all of the green pixels. All of the green

	pixels are turned on to create a completely	5
	green screen. Refer to description of “All Red”	5
	green screen. Refer to description of “All Red”
	test above.

•All Blue - This test verifies the operation of all of the blue pixels. All of the blue pixels are turned on to create a completely blue screen. Refer to description of “All Red” test above.

•All White - This test verifies the display’s ability to turn on all pixels to display a completely white screen. Any pixel that does not turn on will appear as a black dot. Refer to description of “All Red” test above.

•All Black - This test verifies the display’s ability to turn off all pixels to display a completely black screen. Any pixel that does not turn off will appear as a red, green, blue or white dot. Refer to description “All Red” test above.

YORK INTERNATIONAL

00497VIP specifications

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