LG D237IPS Скачать руководство пользователя страница 11

Страница: 11 / 29

ADJUSTMENT

- 11 -

LGE Internal Use Only

1. Coverage

Apply to 58 cm (23 inch) Wide monitor made in Monitor Factory

(Gumi Korea) or made in accordance with the standard of Gumi
Factory process.

2. Appointment

2.1 Adjustment must be done as fixed sequence, and adjustment

sequence can be modified after agreement withthe responsible
R&D engineer considering mass-production condition.

2.2 Power : AC 100 - 240 Voltage (Free)
2.3 Input signal: As Product Standard
2.4 Warm-up Time: Over than 5 minutes
2.5 Adjustment equipment : White balance equipment (CA-

110/210), Display adjust equipment, VG-819(or VG828),
Oscilloscope, PC (More than 486 computer ) & White balance
adjust program., HDCP Adjusting Jig equipment.

3. Adjustment

3.1 Overview

Use factory automation equipment and adjust automatic

movement. But, do via passivity adjust in erroroccurrence.

3.2 Adjustment order

(refer to the Adjustment standard and adjustment command table)

3.2.1 Board Assembly Line

· Connect input signal to 15pin D-sub.

· Check the firmware version & model name. And write the

firmware code to the serial Flash ROM by ISP.

· Ready for adjustment : check whether adjustment command

works normally or not and the operating state of each mode.

· Check the display state of gray color when 256 gray scale

patterns is embodied.

· Read by EEPROM Read Command to check whether initial

value is correct or not.

3.2.2 Total Assembly Line

· Input analog signal. (1920x1080@60Hz)

· Write HDCP Key to EEPROM(24C16) by using DDC2AB

protocol & HDCP Adjusting Jig equipment [ Address 0xAC 80,
325 bytes ]

· If error is occurred, write and check again.

· After finishing it, send the HDCP INIT command (E6 00 00) and

wait about 20 sec.

· Ready : Heat-run during 5 minutes in the state with signal
· Connect input signal to D-sub.

· Default value before adjustment : Energy saving: off , Brightness

“100(Max)”

3.2.3 Adjustment of Horizontal/Verticality screen

position, Clock and Clock Phase at each Mode.

· There is no special factory mode adjustment.

Writing initial value of EEPROM in Board Assembly line is

adjusting Preset Mode and Reset mode. (EEPROM is
initialized when AC Power is ON first.)

· If the change of FOS data is needed after M.P, it is possible by

writing Mode Data with EEPROM write command or modifying
the Mode Data in MICOM itself.

# Caution) Must keep power-on more than 3 seconds after AC

Power-on first time.

3.2.4 Color coordinates adjustment and Luminance

adjustment.

3.2.4.1 Color coordinates adjustment
· Monitor Contrast / Brightness

- Energy saving : off
- Brightness : 100(Max)

· CA-110/CA-210: Set “Channel 7” --> CA-110: channel: 8. CA-

210: Channel 14

· Signal Generator : At cut-off and drive --> 16 step pattern for

ADC
- Output Voltage : 700 mVp-p
- Output Mode : Mode 12 ( 19 60Hz ) mode Setting.

3.2.4.2.Adjustment : Board Assembly Line

EXX41 and EXX48 model use internal ADC, no need connect
D-sub cable
Internal ADC steps as below;
On AC power on with Aging mode, checking the ADC values
and then decide to do or not,

- Read ADC OFFSET and GAIN flags from 0xFE, 0xFF on NVRAM
- If those values are not 0xAA on Aging mode, must do internal

ADC calibration.

- If the result of internal ADC calibration is OK, save the ADC result

and make the OFFSET and GAIN flags to 0xAA and make the
Internal_ ADC flag to INTERNAL.

- Display the result of ADC on Aging Mode OSD and Service OSD

D237IPS Model doesn’t use internal ADC. If don’t use internal
ADC, please follow below step.

· Input 16 step pattern for ADC (Mode12, pattern 11). (Video level

: 700 mVp-p)

· Adjust by commanding AUTO_COLOR_ADJUST

· Confirm “Success” message in Screen or Check the data of

0xFE, 0xFF address of EEPROM(0XA6) is 0xAA after waiting 5
seconds

· If there is “FAULT” message or the data of 0xFE, 0XFF address