Check Leds And Heater Filament; Displaying Screen Tests; Circle-Crosshatch Pattern - DEC VR315 Service Manual

4–4 Aligning the Video Monitor

4.1.2 Check LEDs and Heater Filament

Visually check the monitor to ensure that the following components are
ON:
• LED on the power switch
• LED on the deflection module
• CRT heater filament

4.1.3 Displaying Screen Tests

The procedures in this chapter refer to a circle-crosshatch alignment test
pattern (Figure 4–2) and an all-white test pattern. Display them on the
screen as needed by using procedures for your host system.
Refer to the host system service guide for accessing these diagnostic
screen patterns.
Figure 4–2

Circle-Crosshatch Pattern

M A - X 0 8 8 9 - 8 8