Functions Of Service Mode; White Balance Adjustment - Sony SDM-P82 Service Manual

2-3. Functions of Service Mode

1. COLOR TEMP
This is used for the white balance adjustment at color temperature 9300 K and 6500
K. The adjustment requires to be done for every input (INPUT1: DVI-D, INPUT1:
HD15, or INPUT2: HD15) by switching the input. The adjustment data is stored into
the register for respective inputs.
2. INITIAL EEPROM
This sets the data of the EEPROM to the default data. This operation is not required
usually.
3. CLEAR ETI TIME
This resets the ETI (Elapsed Time Indicator) counter to 00000 H.
4. EEPROM TEST
This tests writing and reading of the EEPROM.
5. RGB RESET
This adjust the offset and gain of the input AD converter for the analog inputs
(INPUT1: HD15 and INPUT2:HD15). As these adjustments are common to both
inputs, perform them for either input. It is unnecessary for another input.
Execute the adjustments under the condition where the signal specified in "White
Balance Adjustment" is input.
6. AGING IN MODE
This sets and clears the NO SYNC AGING flag.
AGING MODE = ON: Sets the NO SYNC AGING flag.
AGING MODE = OFF: Clears the NO SYNC AGING flag.
When the NO SYNC AGING flag is set and the input with no input signal is
selected, the system goes into the AGING MODE. The NO SYNC AGING flag is
held until it is cleared. To clear the NO SYNC AGING flag, go into the service mode
and then set the AGINGN MODE to OFF, or execute the all mode recall.
7. CONTROL REG.
This can check the data of the internal registers. This operation is not required
usually.

2-4. White Balance Adjustment

1. Preparation
(1) Measurement point : Center of screen
(2) Measurement distance : 50 cm
(3) Measurement angle : 90°
(4) Color analyzer (Minolta CS-1000 or equivalent)
(5) Signal generator (Astro Design VG-828D or equivalent)
Be sure to calibrate the analog RGB output level with 75Ω termination.
2. Service mode setting
Enter the service mode referring to step 1 and 2 of Section 2-2.
3. Aging
Set the AGING MODE in the service mode to ON. Disconnect the signal input
terminal or select the input with no signal input, and the system goes into the
AGING MODE.
Execute aging for 30 minutes or more.
4. User control setting
Feed a signal to the selected input, and then execute reset in the menu screen. Then,
move the menu display position to avoid the measurement point. Or, set the
following for respective inputs.
BACKLIGHT (Brightness of backlight) = 100
CONTRAST = 70
BRIGHTNESS = 50
Menu display position = not center of screen (Avoid the measurement point.)
(The setting of the menu display position is common to respective inputs.)
ECO = OFF (The setting of ECO is common to respective inputs.)
Do not change the above setting until the white balance adjustment is completed.
SDM-P82(UC) 2-3