Electrical Adjustments; Preparation; White Balance Adjustment - Sony LMD-2140MD Service Manual

2-1. Preparation

. Required tools and measuring equipment
Luminance meter : Minolta CA-210, CA-110 or equiva-
lent.
If Minolta CA-210, CA-110 or
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 MENU to display the MENU screen.
2. Press the APA and ENTER buttons simultaneously
with MENU screen appeared.
Preparing the power supply and signals
1. Connect the supplied power cord to AC IN of the set.
Power voltage : 100 to 240 V AC, 50/60Hz
2. Connect the signal coming from the VG-854 to the
VIDEO IN connector of the set. Because this signal is
used for synchronization, any type of signal can be
used as long as the signal has the receivable format.
3. Turn on the power of the LMD-2140MD. For set,
select the signal that is used for signal input.

2-2. White Balance Adjustment

1. Move the cursor to SIG using the Down ↓ key and
press ENTER to enter the SIGNAL layer.
2. Move the cursor to WHITE BALANCE using the
Down ↓ key and press ENTER 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
key.
LMD-2140MD
Section 2

Electrical Adjustments

. HIGH adjustment
1. Select HIGH from COLOR TEMP and set it by
pressing ENTER.
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.
. LOW adjustment
1. Select LOW from COLOR TEMP and set it by
pressing ENTER.
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.
. LOW2 adjustment
1. Select LOW2 from COLOR TEMP and set it by
pressing ENTER.
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.
. LOW3 adjustment
1. Select LOW3 from COLOR TEMP and set it by
pressing ENTER.
Target value : x = 0.316, y = 0.326
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