Technical data

Chapter 6 6-9
Digital Control Troubleshooting
Display Troubleshooting (A2, A18, A19, A27)
Red, Green, or Blue Pixels Specifications
Red, green, or blue “stuck on” pixels may appear against a black background. To test for
these dots, press
.
In a properly working display, the following will not occur:
— complete rows or columns of stuck pixels
— more than 5 stuck pixels (not to exceed a maximum of 2 red or blue, and 3 green)
— 2 or more consecutive stuck pixels
— stuck pixels less than 6.5 mm apart
Dark Pixels Specifications
Dark “stuck on” pixels may appear against a white background. To test for these dots,
press .
In a properly working display, the following will not occur:
— more than 12 stuck pixels (not to exceed a maximum of 7 red, green, or blue)
— more than one occurrence of 2 consecutive stuck pixels
— stuck pixels less than 6.5 mm apart
Newton's Rings
To check for the patterns known as Newton's Rings, change the display to white by
pressing the following keys:
Press .
Figure 6-5 illustrates acceptable and non-acceptable examples of Newtons Rings.
System
SERVICE MENU TESTS
70 x1
EXECUTE TEST
CONTINUE
System
SERVICE MENU TESTS
66 x1
EXECUTE TEST CONTINUE
System
SERVICE MENU TESTS
66 x1
EXECUTE TEST CONTINUE