DOWNLOAD LG 26LC45 / 26LC46 / 26LC4D (CHASSIS:LD73A) Service Manual ↓ Size: 5.47 MB | Pages: 44 in PDF or view online for FREE

Model
26LC45 26LC46 26LC4D (CHASSIS:LD73A)
Pages
44
Size
5.47 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
26lc45-26lc46-26lc4d-chassis-ld73a.pdf
Date

LG 26LC45 / 26LC46 / 26LC4D (CHASSIS:LD73A) Service Manual ▷ View online

- 13 -
6.3 Adjustment of RGB
(1) Required Equipments
- Remote controller for adjustment
- MSPG-925F Pattern Generator
(Which has XGA [1024*768] 60Hz 8 Color Bar pattern
shown in Fig. 1)
(2) Method of Auto RGB Color Balance
1) Input the PC 1024x768@60Hz 100% Color Bar pattern
(MSPG-925F model:37, pattern:33) into RGB. 
(Using D-sub to D-sub cable)
2) Set the PSM to Dynamic mode in Picture menu.
3) Press the IN-START key on R/C for adjustment
4) Press the 
G
(Vol.+) key operate To set , then it becomes
automatically.
5)  Auto-RGB OK means adjustment is completed.
* Before White-balance, the AV ADC should be done.
7. White Balance
* Test Equipment
Color Analyzer (CA-210/CH.9)
-> When you adjust LCD color temperature, on Color
analyzer (CA-210), you should use Channel 9 which is
Matrix compensated (White, Red, Green, Blue revised) by
CS-1000 and adjust in accordance with White balance
adjustment coordinate which is specified on the next.
* Color temperature standards according to CSM and Module
Cool : 11,000k
Medium : 9,300k
Warm : 6,500k
* White balance adjustment coordinate and color temperature
- PC (for communication through RS-232C)
-> UART Baud rate : 115200 bps
- Luminance Y AV : upper 150 cd/ß≥ (Typ : 350 cd/ß≥)
-> Applying to Cool, Medium, Warm mode
* Connecting picture of  the measuring instrument (On
Automatic control )
Inside PATTERN is used when W/B is controlled. Connect to
auto controller or push control R/C IN-START  
-> Enter the mode of White-Balance, the pattern will come
out.
* Auto-control interface and directions
1) Adjust in the place where the influx of light like floodlight
around is blocked. (illumination is less than 10ux).
2) Adhere closely  the Color Analyzer ( CA-210 ) to the
module less than 10cm distance, keep it with the surface
of the Module and Color Analyzer’s Prove
vertically.(80~100°).
3) Aging time  
- After aging start, keep the power on (no suspension of
power supply) and heat-run over 15 minutes.
- Using ‘no signal’ or ‘full white pattern’ or the others,
check the back light on.
7.1 Manual white Balance 
- One of R Gain / G Gain / B Gain should be kept on 80, and
others  are controlled lowering from 80 
1) Press ‘power on’ of the control R/C, set heat run to white by
pressing 
G
, and heat run over 15 minutes. (Set : RS-233
Host : PC, Baud Rate : 115200bps, Download : Cortez)
2) Zero Calibrate CA-210, and when controlling, stick the
sensor to the center of LCD module surface.
3) Double click In-start key on Controlling R/C and get in ‘white
balance’.
4) Set test-pattern on and display inside pattern. Control is
carried out on three color temperature, COOL, MEDIUM,
WARM. (Control is carried out three times,)
5) When the R/G/B GAIN is 80 on OSD, it is the FULL
DYNAMIC Range of the Module. In order to control white
balance without the saturation of FULL DYNAMIC Range
and DATA, one of R Gain / G Gain / B Gain should be kept
on 80, and other two is controlled lowering from 80.
* Color Temperature: Cool, Medium, Warm
1) When R GAIN is set to 80
- Control G GAIN and B GAIN by lowering from 80. 
2) When B GAIN is set to 80
- Control R GAIN and G GAIN by lowering from 80.
3) When G GAIN is set to 80
- Control R GAIN and B GAIN by lowering from 80.
One of R Gain / G Gain / B Gain should be kept on 80,
and adjust other two lower than 80.
(When R/G/B GAIN are all 80, it is the FULL DYNAMIC
Range of Module)
Cool
CS-1000
CA-210(CH 9)
x
0.276
0.276±0.002
y
0.283
0.283±0.002
Δuv
0.000
0.000
Medium
CS-1000
CA-210(CH 9)
x
0.285
0.285±0.002
y
0.293
0.293±0.002
Δuv
0.000
0.000
Warm
CS-1000
CA-210(CH 9)
x
0.313
0.313±0.002
y
0.329
0.329±0.002
Δuv
0.004
0.004
<Fig. 2> Connecting picture (On Automatic Control)
8. Set information(Serial No & Model name)
(1) Setting up like bottom figure (After setting white balance,
this is set)
1) Press ADJ Key in the Adjust remocon.
2) Select  “System Control 2” by using 
D
/
E
(CH+/-) key,
and press 
A
(ENTER).
3) Using Adjust remocon, RS-232 Host & Baud Rate &
Download value change (RS-232 Host:Gprobe, Baud
Rate:115200bps, Download:Cortez)
(2) Bar-code scanning
1) Push the menu button in DTV mode. 
Select the STATION -> Diagnostics -> To set
2) Check the Serial Number.
- 14 -
- 15 -
TROUBLESHOOTING
1. Power Board 
1-1. The full flowchart for the voltage output
Start check
Manufacture’s model
passage
1. Check the Power Off
status.
Does the whole
screen appear?
Is it 
identical to when the
power is off?
No
Yes
No
Yes
Yes
Yes
Yes
2. Check the Interface
signal status.
Is the Interface 
signal operating?
Yes
3. Check the St-by 5V
signal circuit.
Does the 
low pressure output
appear?
Does the 
St-by 5V signal 
appear?
No
No
Yes
4. Check the 5V Monitor
signal circuit.
Does the 
5V Monitor signal 
appear?
No
7. Check the VSC Vs-ON
signal 
Does the 
high tension output
appear?
Does the 
VSC signal Vs-ON
appear?
No
No
Does the
high tension 
output voltage
occur?
When
removing  the Y B/D
Module input connector,
does output voltage
drop?
When the
Y, Z B/D Module
input connector, does Power
Board high tension 
output voltage drop?
No
No
No
9. Check the Power
Board Output high
tension circuit
Yes
10. Check the Z B/D
Module output circuit
Yes
When 
removing the Z B/D
Module input connector,
does output voltage
drop?
11. Check the Y B/D
Module output circuit
Yes
Yes
8. Check the Vs, Va
voltage output circuit.
Does the 
Vs, Va voltage output
appear?
No
Yes
Yes
5. Check the VSC RL-ON
signal.
Does the 
VSC signal RL-ON
appear?
No
6. Check the VSC low
pressure output
Does the 
VSC low pressure
output appear?
No
- 16 -
2. No Power
(1) Symptom
1) Does not  minute discharge at module. 
2) Non does not come into the front LED. 
(2) Procedure check
Is the power cord plugged in?
Plug in the power cord.
Yes
No
Is the Line Filter and Power
Board Cable connected?
Connect the Cable.
Yes
No
Is the appropriate Fuse(F101) on
the Power Board?
Replace the Fuse.
Yes
No
Is the Power Board and 13P of
VSC Board Cable connected?
Connect the Cable.
Yes
No
After removing the cables, connect them to the Power Board(except the
SC101 connection cable), and change the AC voltage marking to manual.
When ST-BY 5V does not operate, replace the Power Board.
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