Display Unit Check (Monitor Test) - JRC JMA-5212-4/6 Service Manual

Communication line check (Line Test)
Checks the status of communication with optional equipment, external navigators, or
the likes.
TXRX
NSK
Compass
COM1
COM2
COM3
COM4
Plotter Key
If no abnormality is detected, "OK" is displayed; if an abnormality is detected, "NG" is
displayed.
** is displayed for equipment not connected.

6.1.2. Display Unit Check (Monitor Test)

This function checks the display unit.
The test pattern will be shown on the display.
1. Pattern1 : 1. Filled in solid white
2. Pattern2 : 2. A white box is displayed on a black background of
3. Pattern3 : 3. Two squares, two circles, and nine cross shapes are
4. Pattern4 : 4. Letters "H" of 9 u 9 dots are displayed on the entire
5. Pattern5 : 5. A gray scale (16 levels) is displayed.
6. Pattern6 : 6. A color bar is displayed.
7. Pattern7 : 7. Colors specified with RGB are displayed.
To return to the ordinary display, press any key.
If no test pattern is displayed, a monitor error is assumed.
Check on connection with the scanner unit
Check on connection with the NSK (NCT-4106A)
unit
Check on connection with equipment on the
compass port
Check on connection with the COM1 port
Check on connection with the COM2 port
Check on connection with the COM3 port
Check on connection with the COM4 port
Check on connection with the plotter control unit
1280 u 1024 dots.
displayed (with white lines on a black background).
screen (with white letters on a black background).
6-3