Roland V-Synth GT Service Notes page 34

May, 2007
21. D BEAM ADJUST
This performs adjustment of the D beams.
A screen like the one shown below is displayed on the LCD.
fig.21-1-dbeammax.eps_90
Hold the hand at a location 5 cm above the D beams and touch Max.
A screen like the one shown below is displayed on the LCD.
fig.21-2-dbeammin.eps_90
Hold the hand at a location 40 cm above the D beams and touch Min.
When adjustment ends, execution automatically advances to the next test item.
22. D BEAM CHECK
This performs verification of the D beams.
A screen like the one shown below is displayed on the LCD.
fig.22-dbeam-check.eps_90
Make sure that a value of 127 is displayed at a location of 5 cm for both the L
and R D beams.
Make sure that a value of 0 is displayed at a location of 40 cm.
If no problem occurs, execution automatically advances to the next test item.
23. LCD
This verifies the display on the LCD screen.
A screen like the one shown below is displayed on the LCD.
fig.23-1-lcd.eps_90
Press [+OCT] or [INC].
Seven types of pattern are displayed. Check each for the presence of discolored
dots, uneven colors, missing dots, and noticeable video artifacts.
Press [+OCT] or [INC] to advance to the next pattern.
fig.23-2-lcd.eps_90
7-color and gray scale bars
fig.23-3-lcd.eps_90
Gray scale, Red, Green and Blue
V-SYNTH/GT
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