DOWNLOAD LG 42LC7R (CHASSIS:LP78A) Service Manual ↓ Size: 5.72 MB | Pages: 38 in PDF or view online for FREE

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7) Double click the download file low then, "edit" window

will be opened.

8) Chick the choice button I n the "edit window", then "file

choice window’ will be opened

9) Choose the Hex file in folder and execute downloading

with click "open button"

10) Click OK button at the "edit window"

11) Downloading

12) If download is failed, for example "No acknowledge

from slave", execute download again from (1).

(1) Connect the download jig to D-sub jack.
(2) Execute ‘Channel.vi2c’ program in PC, then a main

window will be opened.

(3) Push the button change and select the Channel memory

data.

(4) Check the communication is OK or not.
=> Push the Read area (Ackn. Check) and check Cyan area

is OK message.

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(5) Push the Update NVM from File

Before PCB check, have to change the Tool option and Area
option
Option values are below
(If on changed the option, the input menu can differ the model
spec.)
The input methods are same as other chassises(Use adj Key
on the Adjust Remocon)

(1) Tuning the RF signal

ZA, TA : PAL Philips Pattern(with color Bar)
MA : NTSC Digital Pattern(with color Bar)

(2) push the "adj" key in the adjustment remocon.

* Caution

- Use the proper signal cable for EDID Download.
- Never connect HDMI & D-SUB Cable at the same time.
- Use the proper cables below for EDID Writing.

* EDID Data

<EDID DATA Analog Set : 128bytes>

< EDID DATA HDMI Set : 256bytes>

Tool Option

26

02240

04288

32

02256

04304

37

02264

04312

42

02272

04320

Area Option

Depend on PR

Item

Manufacturer ID

Version

Revision

Condition

GSM

Digital : 1

Digital :3

Data

1E6D

01

03

For RGB EDID

For HDMI EDID

=> Detail EDID Options are below(a, b, c, d, e)

a. Product ID

b. Serial No :  Controlled on production line
c. Month, Year : Controlled on production line

ex) Montly: '03'  =>  '03' 

Year:  '2005' =>  '0F'

d. Model Name(Hex): 

e. Checksum (7EH) : Changeable by total EDID data

(1) DDC data of Analog-RGB

1) Init the data

2) Load the EDID data. (Open file)

[Analog - RGB : LP78A_RGB.ANA]
[Digital - HDMI : LP78A_HDMI.DVI]

3)Set the S/W as below

4) Push the “Write Data & Verify”button. And confirm “Yes”.
5) If the writing is finished, you will see the “OK” message.

(1) Remote control for adjustment 
(2) Color Analyzer (CA-110 or CA-210 or same product)
(3) Auto W/B adjustment instrument(only for Auto adjustment)

(1) Enter the DDC adjust mode

- Enter the DDC adjust mode at the same time heat-run

mode when pushing the power on by power only key

- Enter the adjust mode and change the input mode to AV

(ZA : AV3, TA,MA : AV2)when pushing the Front av key

- Maintain the DDC adjust mode with same condition of

Heat-run -> Maintain after AC off/on in status of Heat-run
pattern display

(2) Release the DDC adjust mode

- Release the adjust mode after AC off/on or std-by off/on

in status of finishing the Hear-run mode

- Release the Adjust mode when receiving the aging off

command(F3 00 00) from adjustment equipment

- Need to transmit the aging off command to TV set after

finishing the adjustment.)

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<EDID DATA>

- 16 -

(3) DDC adjustment support command set

- Operate the zero-calibration of the CA-110 or CA-210, then

stick sensor to LCD module when you adjust. 

- For manual adjustment, it is also possible by the following

sequence

1) Select RF no signal by pressing “POWER ON” key on

remote control for adjustment then operate heat run
more than 15 minutes. 
(If not executed this step, the condition for W/B will be
differ. The W/B condition is Picture Mode : Standard
(MA : Optimum), Color Temp : Normal. )

2) Changing to the av mode by pushing the input or front av

key.

3) Display the internal pattern of the VCT-Pro IC by

pushing the IN-START.

4) Stick sensor to center of the screen and select each

items (Red/Green/Blue Gain and Offset) using 

D

/

E

(CH+/-) key on R/C.

5) Adjust R Gain / B Gain using 

F

/

G

(VOL+/-) key on R/C.

6) Adjust it until color coordination becomes as below. 

(Initially, R/G/B gain and R/G/B offset values are fixed
as below)

Red Gain : 80 ,   Green Gain : 80 ,    Blue Gain : 80
Red Offset : 80,  Green Offset : 80 ,  Blue Offset : 80

* Target Value [Picture Mode : Standard (ZA, TA),

Optimum(MA),  Color Temp: Normal]

-Normal (9300K)    x ; 0.283±0.003  y ; 0.298±0.003
-Luminance(Y)   AV : upper 150 cd/m

2

(Typ : 350 cd/m

2

≥)

=> Reference Value(Automatically fixed)

- Cool(11000K): x:0.274±0.003, y: 0.286±0.003
- Warm(7200K) : x:0.303±0.003, y: 0.319±0.003

<Pattern for Adjustment of White Balance>

7) When adjustment is completed, Exit adjustment mode

using EXIT key on R/C

1) Push the ADJ key in a Adjust Remote control.
2) Input the Option Number that was specified in the BOM,

into the Shipping area.

3) The work is finished, Push 

A

Key.

<Default Value on OSD>

Adjustment

Aging On/Off

Input select

R GAIN

G GAIN

B GAI

CMD(HEX)

F3

F4

16

18

1A

ADR

00

00

00

00

00

FF : ON / OO : OFF

0x10 : TV

0x20 : AV1(SCART1)

0x21 : AV2(SCART2)

0x23 : AV3(Side AV)

0x40 : Component1

0x50 : RGB DTV

0x60 : RGB PC

0x90 : HDMI1 DTV

GAIN adjustment

Item

Dielectric Voltage (AC <-> FG)

Dielectric Voltage (Without FG)

Value

1.5

3

Unit

kV

kV

Remark

At 100mA for 1sec (Line)

At 100mA for 1min (OQC)

At 100mA for 1sec (Line)

At 100mA for 1min (OQC)

Item

Min

Typ

Max

Unit

Remark

Audio Practical Max Output, L(Mono)/R

6

7

9

W

LCD