Electrical Alignments; Preparation; White Balance Adjustment - Sony LMD-2450W Service Manual

2-1. Preparation

Required tools and measuring equipment
. Luminance meter:
Minolta CA-210, CA-110 or equivalent.
If equivalent is not available, make adjustment by
comparing the LCD monitor with the reference monitor
that has already been calibrated correctly.
. Signal generator: VG-854 or equivalent
Warm-up time
Before starting adjustment, allow a warm-up of minimum
120 minutes to stabilize the back light of the LCD panel.
How to enter service mode
1. Press the [MENU] button to display the MENU
screen.
2. Press the [CONTROL] and [RETURN] buttons
simultaneously.
Preparing the power supply and signals
1. Connect the supplied AC cord of this unit.
Power voltage: 100 to 240 V AC, 50/60Hz
2. Turn on the power of this unit.

2-2. White Balance Adjustment

If the LCD panel is changed, perform the white balance
adjustment.
1. Move the cursor to SIGNAL using the Down ↓ key
and press the [ENTER] button to enter the SIGNAL
layer.
2. Move the cursor to WHITE BALANCE using the
Down ↓ key and press the [ENTER] button to enter
the SIGNAL/WHITE BALANCE layer.
To move the cursor to select an item, use the Up ↑ or
Down ↓ key. To set the selected item, press the [ENTER]
button.
LMD-2450W
Section 2

Electrical Alignments

D93 adjustment
1. Select D93 from COLOR TEMP and set it by pressing
[ENTER] button.
Target value : x = 0.283, y = 0.298
2. Select ADJUST GAIN, and adjust the GAIN. Adjust
using R and B while G is fixed.
3. Select ADJUST BIAS, and adjust the BIAS. Adjust
using R and B while G is fixed.
4. Repeat steps 2 and 3 until all of the required specifica-
tions are met all at the same time.
D65 adjustment
1. Select D65 from COLOR TEMP and set it by pressing
[ENTER] button.
Target value : x = 0.313, y = 0.329
2. Select ADJUST GAIN, and adjust the GAIN.
Adjust using R and B while G is fixed.
3. Select ADJUST BIAS, and adjust the BIAS.
Adjust using R and B while G is fixed.
4. Repeat steps 2 and 3 until all of the required specifica-
tions are met all at the same time.
D56 adjustment (LMD-2450MD/2450MC)
1. Select D56 from COLOR TEMP and set it by pressing
[ENTER] button.
Target value : x = 0.330, y = 0.345
2. Select ADJUST GAIN, and adjust the GAIN.
Adjust using R and B while G is fixed.
3. Select ADJUST BIAS, and adjust the BIAS.
Adjust using R and B while G is fixed.
4. Repeat steps 2 and 3 until all of the required specifica-
tions are met all at the same time.
2-1