Hitachi DZ-GX5020A K Service Manual page 121

Adjustment > Adjustment Procedure
(3) LCD Brightness
Preparations:
1) Connect the oscilloscope CH2 to "LCD-G
(pin 13)" of Halcyon connector.
2) Switch the oscilloscope V-MODE to
"CH2": Leave the TRRIGER SOURCE in
"CH1" as is.
Procedure:
LCD ADJUSTMENT MENU screen
MANUAL ADJUSTMENT PROGRAM for SERVICE STATION
LCD ADJUSTMENT MENU
LCD ADJUSTMENT MENU
PLL
CONTRAST
BRIGHT
WHITE BALANCE
2 EXECUTE
CONNECTION
1) Choose BRIGHT.
2) Click the EXECUTE button.
[Before Adjustment]
B
[After Adjustment]
B = 2.35V ± 0.1Vp-p
Fig. 6-4-9 Waveform of LCD Bright Adjustment
1
RETURN
6 - 36
BRIGHT ADJUSTMENT screen
MANUAL ADJUSTMENT PROGRAM for SERVICE STATION
BLIGHT ADJUSTMENT
UP
3
4
SAVE
CONNECTION
3) Click the UP or DOWN button so that the
value of level B of waveform is 2.35V ±
0.1Vp-p. Click the button at approx. 2-second
intervals while checking any increase or
decrease in level B.
4) After step 3) is complete, be sure to click the
SAVE button.
Note that clicking the RETURN button will
restore the LCD ADJUSTMENT MENU
screen to the status before the adjustment
was performed.
ADJUSTMENT FINISHED dialog
FINISHED
ADJUSTMENT FINISHED.
5
OK
5) Click the OK button in dialog to restore the
LCD ADJUSTMENT MENU screen.
DOWN
RETURN