DOWNLOAD LG 42LC50C (CHASSIS:LA64A) Service Manual ↓ Size: 7.88 MB | Pages: 29 in PDF or view online for FREE

Model
42LC50C (CHASSIS:LA64A)
Pages
29
Size
7.88 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
42lc50c-chassis-la64a.pdf
Date

LG 42LC50C (CHASSIS:LA64A) Service Manual ▷ View online

- 14 -
6.2 Auto Component Color Balance
6.2.1 Required Test Equipment
- Remote controller for adjustment
- 802F Pattern Generator Which has 720p YPbPr output
with Standard (0.7Vpp) See Fig. 2
- It is very important to use correct adjustment pattern like
Fig. 2.
6.2.2 Method of Auto Component Color Balance
1) Input the Component 1280*720p 60Hz signal into
Component.
=> MSPG-925FS Model No: 217 / Pattern No: 65
2) Set the EZ Pictures to Daylight mode in Video menu.
3) Press INSTART key on R/C for adjustment. 
4) Press the 
G
(Vol. +) key operate To set, then it becomes
automatically.
5) Auto-RGB OK means completed adjustment 
6.3 Auto RGB Color Balance
6.3.1 Required Test Equipment
- Remote controller for adjustment
- 802F Pattern Generator, Master (MSPG-925FS), etc.
(Which has XGA 60Hz PC Format output with standard
(0.7Vpp) See  Fig. 3 )
-  It is very import to use correct adjustment pattern like Fig.
3.
6.3.2 Method of Auto RGB Color Balance
1) Input the PC 1024x768 @ 60Hz into RGB.
=> MSPG-925FS Model No: 60 / Pattern No: 65
2) Set the EZ Pictures to Daylight mode in Video menu.
3) Press INSTART key on R/C for adjustment. 
4) Press the 
G
(Vol. +) key  operate To set, then it becomes
automatically.
5) Auto-RGB OK means completed adjustment.
<Fig.2> Auto Component Color Balance Test Pattern
Default Value on OSD
Auto Color Balance (Hex)
Auto-RGB
G
To Set
Source
Main
Red Offset1
0F8
Green Offset1
0DA
Blue Offset1
0BC
Red Offset2
01
Green Offset2
01
Blue Offset2
01
Red Gain
1FE
Green Gain
1FE
Blue Gain
1FE
Reset
G
To Set
<Fig.3> Auto RGB Color Balance Test Pattern
Default Value on OSD
Auto Color Balance (Hex)
Auto-RGB
G
To Set
Source
Main
Red Offset1
069
Green Offset1
0DA
Blue Offset1
0D0
Red Offset2
37
Green Offset2
39
Blue Offset2
3F
Red Gain
19F
Green Gain
183
Blue Gain
195
Reset
G
To Set
- 15 -
6.4 RF Color Balance
1) Input the RF cable(2 ch)
2) Set the EZ Pictures to Daylight mode in Video menu.
3) Press INSTART key on R/C for adjustment.  
4) Press the 
G
(Vol. +) key operate To set, then it becomes
automatically.
5) Auto-RGB OK means completed adjustment 
7. EDID / DDC INPUT
7.1 EDID(The Extended Display Identification Data) /
DDC(Display Data Channel) download
7.1.1 Required Test Equipment
1) Adjusting PC with S/W for writing EDID Data.
2) A Jig for EDID Download
3) Cable: Serial (9Pin or USB) to D-sub 15Pin cable, D-sub
15Pin cable, DVI to HDMI cable.
7.1.2 Setting of device
- When input HDMI EDID data through RGB or HDMI jack,
writing 8bits of the data at every turn with 'DDC2B'
protocol.
Default Value on OSD
Auto Color Balance (Hex)
Auto-RGB
G
To Set
Source
Main
Red Offset1
032
Green Offset1
030
Blue Offset1
033
Red Offset2
40
Green Offset2
40
Blue Offset2
40
Red Gain
03C
Green Gain
03C
Blue Gain
01F
Reset
G
To Set
<Fig.4> Connection Diagram of DDC download
- 16 -
7.1.3 Data of EDID for 32/37/42LC5DC-UA,32LX5DC-UA
7.1.3.1 DDC data of Analog-RGB
7.1.3.2 DDC data of Digital-HDMI1
7.1.3.3 DDC data of Digital-HDMI2
8. Adjustment of White Balance
8.1 Required Equipment
- Remote controller for adjustment 
- Color Analyzer (CA-210 or same product )
- Auto W/B adjustment instrument(only for Auto adjustment)
- Use inner(SELF) Pattern 
8.2 Adjustment of White Balance (For Manual adjustment)
Set TV input to RF.
Operate the zero-calibration of the CA-210, Ch.9. 
Then stick sensor to LCD module surface when you adjust. 
For manual adjustment, it is also possible by the following
sequence.
1) Select white pattern of heat-run mode by pressing power
on key on remote control for adjustment then operate
heat run more than 15 minutes. 
2) Enter the White Balance adjustment mode by pressing
the INSTART key twice (White Balance) on R/C.
3) Stick sensor to center of the screen and select each
items using  
D
/
E
(CH +/-) key on R/C.
4) Adjust G Gain / B Gain using 
F
/
G
(VOL +/-) key on R/C.
5) Adjust it until color coordination becomes as below. 
- By controlling G, B GAIN, adjust X, Y target value. 
- R Gain fixed at cool, normal, warm mode.
- But, Control the R GAIN, unless it has correct value
(Initially, R/G/B gain and R/G/B offset values are fixed as below.)
Red Gain: 80h
Green Gain:  80h Blue Gain: 80h
Red Offset: 80h
Green Offset: 80h Blue Offset: 80h 
*Target value
X
Y
Temp (∆ uv)
Cool
0.276 ± 0.002        0.283 ± 0.002
11000k (0.000)
Normal
0.285 ± 0.002        0.293 ± 0.002
9300k (0.000)
Warm
0.313 ± 0.002        0.329 ± 0.002
6500k (0.003)
6) When adjustment is completed, Exit adjustment mode
using EXIT key on R/C.
Before adjustment of white balance, should be executed the
'color balance adjustment'
- 17 -
9. Auto white Balance (AV)
command1 command2 Set ID      Data
Default value
Min    Max
Input Select x
b
01
20h     90h
R-Gain
j
a
01
0h      FEh
77h
G-Gain
j
b
01
0h      FEh
80h
B-Gain
j
c
01
0h      FEh
7ch
R-Offset
j
d
01
0h      FEh
7ch
G-Offset
j
e
01
0h      FEh
80h
B-Offset
j
f
01
0h      FEh
8ch
10. Test factor for commercial model
10.1 IR In/ Out Check
10.1.1 Check Order 'Pass' Judgment
1) Insert RJ45 Cable, RS-232C Cable 2EA. Phone Jack to
each Port as below Picture.
2) Change the Mode 'PTC Only' On OSD(In-start -> Uart
Control -> Download -> PTC°±)
3) Running the 'IR/MPI Check Program' on PC
4) Click the 'AUTO Run' or 'Push the Spacebar' on the
keyboard
5) If the Sign is 'NG' try One More as 'Push the Spacebar'
6) Confirm the 'OK' Sign on Screen that means IR in & MPI
Test Pass / 'NG' Sign is NG
Confirm the 'PASS' Sign of IR Out Check JIG / 'NG' Sign
is NG
7) After finish Check. Change the Mode 'D-Box On'(In-start
-> Uart Control -> D-Box 'ON')
10.1.2 Needs JIG & Equip. & Cable
PC('MPI/IP In' Check Program. RS-232C 2Port), IR Out
Check Jig(With level Shifter), 232C to Phone jack Cable, 5V
Adapter, 232C Cable(Cross) 232C Cable(Cross) 2EZ,
RJ45(Direct) Cable.
10.2 Lodgenet Card & Auto Camport Check
10.3 RJP(Remote Jack Pack) Check
10.3.1 Check Order 'Pass' Judgment
1) Connecting RJP Test JIG & RJP Port of Set with Modem
Cable(8Pin)
2) Check the RJP operation on OSD(In-start -> RJP Pin
Check -> 
G
3) 'SUCCESS! PIN CONNECTION OK' -> PASS
4) 'Pin Check Fail!!!!' -> NG
5) If the Result is 'NG', try One More
10.3.2 Needs JIG & Equip. & Cable
1) RJP Check JIG, Modem Cable (8 Pin)
10.4 MPI Card Check
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