DOWNLOAD LG 42LB1DRA (CHASSIS:LA61A) Service Manual ↓ Size: 11.23 MB | Pages: 56 in PDF or view online for FREE

Model
42LB1DRA (CHASSIS:LA61A)
Pages
56
Size
11.23 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
42lb1dra-chassis-la61a.pdf
Date

LG 42LB1DRA (CHASSIS:LA61A) Service Manual ▷ View online

(2) ADC 1080i Component1/RGB Adjustment
- Check the connection Component1, RGB to the Test
Equipment 
1) Select Component1, RGB as the input with  100%
Horizontal Color Bar Pattern(HozTV31Bar) in 1080i
Mode and select ‘Normal’ in screen.
2) After receiving signal for at least 1 second, press the
ADJ Key on the Service R/C to enter the ‘Ez - Adjust’
and select the ‘5. ADC 480p Comp1/RGB’.
Pressing the Enter key to adjust with automatic
movement.
3) When the adjustment is over, 'ADC Component1
Success’ is displayed. If the adjustment has errors,
'ADC Configuration Error’ is displayed.
4) After the Component1 adjustment is over, convert the
RGB-DTV Mode and display Pattern. When the
adjustment is over, 'ADC RGB_DTV Success’ is
displayed. 
5) Readjust after confirming the case Pattern or adjustment
condition where the adjustment errors. 
Error massage is ‘Component Not Connection’ or
‘Change Format to 480i’ or ‘Check Pattern of device’.
6) After adjustment is complete, exit the adjustment mode
by  pressing the ADJ KEY.
11. Adjustment of White Balance
11.1. Required Equipment
(1) Color Analyzer : CA-210 or same product
(2) Computer to adjust (needed for the automatic adjustment,
possible to communicate with the RS-232C)
(3) Pattern Generator(MSPG-925FA)
11-2. Connection Diagram of Equipment
for Measuring(Automatic adjustment)
11-3. Adjustment of White Balance
- “wb 00 00” : Start Auto-adjustment of white balance.
- “wb 00 10” : Start Gain Adjustment (Inner pattern) 
- “jb 00 c0” : 
- …
- “wb 00 1f” : End of Adjustment
* If it needs, offset adjustment(wb 00 20-start, wb 00 2f-end)
- ”wb 00 ff” : End of white balance adjustment (inner pattern
disappear)
Caution) When you adjust automatically, RS-232C Command
is used.
(1) Automatic adjustment of White Balance adjustment
- Execute Power Only key of the adjustment R/C to
execute automatic adjustment. Set the Baud Rate to
115200.
- Always start adjustment with “wb 00 00” and end
adjustment with “wb 00 ff”
- Adjust the offset if necessary.
(2) Manual adjustment of White Balance
O
Operate the Zero-calibration of the CA-210, then attach
sensor to LCD module surface when you adjust.
O
Manual adjustment is also possible by the following
sequence.
1) HEAT RUN at least 30 minutes by pressing the Power
only  Key on the Service Remote Control and adjust.
2) After attaching sensor to center of screen, select ‘White-
Balance’ of ‘Ez-Adjust’ by pressing the ADJ key on the
Service R/C. Then enter adjustment mode by pressing
the Right KEY (G). This time white pattern is displayed.
RS-232C COMMAND
Meaning
[CMD    ID      DATA]
wb
00
00
White Balance adjustment start.
wb
00
10
Start of adjust gain (Inner white pattern)
wb
00
1f
End of gain adjust
wb
00
20
Start of offset adjust(Inner white pattern)
wb
00
2f
End of offset adjust
wb
00
ff
End of White Balance adjust(Inner pattern disappeared)
- 13 -
Full White Pattern
Digital RGB
PDP MONITOR
COLOR
ANALYZER
TYPE; CA-100
MSPG-925FA
<Fig. 4> Connection Diagram of Automatic Adjustment
R Gain
G Gain
B Gain
R Cut
G Cut
B Cut
Jg
Jh
Ji
Cool
Ja
Jb
Jc
Mid
RS-232C COMMAND
[CMD ID DATA]
CENTER
(DEFAULT)
Jd
Je
Jf
00
00
00
255
255
255
127
127
127
Warm
Min
Max
184
187
192
64
64
64
Cool
161
183
192
64
64
64
Mid
192
159
95
64
64
64
Warm
3) In case that White balance is COOL.
- Fix B Gain(192)/ R-Cut(64)/ G-Cut(64)/ B-Cut(64) and
adjust the High Light by R Gain / G Gain.
In case that White balance is Medium.
- Fix R Gain(192)/ R-Cut(64)/ G-Cut(64)/ B-Cut(64)  and
adjust the High Light by G Gain / B Gain.
In case  that White balance is Warm
- Fix R Gain(192)/ R-Cut(64)/ G-Cut(64)/ B-Cut(64)  and
adjust the High Light by G Gain / B Gain.
4) Adjust using Volume +/- key.
5) After adjustment is complete, exit the adjustment mode
by pressing the ADJ key.
* Color coordinate and temperature of White Balance
- Brightness : High Level : 216 gray
1) Cool : 12000 ºK, ∆uv=0.000, luminance Min : 300 cd
2) Medium : 9300 ºK, ∆uv=0.000, luminance Min : 300 cd
3) Warm : 6500 ºK, ∆uv=0.000, luminance Min : 250 cd
12. Video(uPD)-Set
Adjustment for reduce color difference Main/Sub screen of RF
or Video signal.
12-1. Adjustment
(1) Connection the Video Signal Generator(Master) to the TV
AV Input terminal.
After input pattern(Model: 201(NTSC-M), Pattern: 33(100%
color Bar), pressing the ‘Rev’ button and appear as below
figure.
(2) After receive signal, confirm the signal receiving.
And Enter the ‘EZ-ADJUST’ by pressing the ADJ Key on
the Service R/C.
Select ‘5. Video(UPD)-Set’ and enter the adjustment mode
by pressing the right key (G).
(3) When enter the adjustment mode, displayed the TV 2CH
SPLIT Screen automatic at picture and appear as below
figure.
(4) When the automatic adjustment is over, 'RF Configuration
Success’ is displayed. If the adjustment has errors, 'Video
Configuration Error’ is displayed.
(5) After the RF signal automatic adjustment is over, convert
the Video Mode as below figure and adjust with automatic
movement the Video Mode. 
When the automatic adjustment is over, 'Video
Configuration Success’ is displayed. If the adjustment has
errors, 'Video Configuration Error’ is displayed.
- 14 -
Color temperature
Test Equipment
Color Coordination
x
y
COOL
CA-210
0.272±0.002
0.276±0.002
CS-1000
0.272±0.002
0.278±0.002
MEDIUM
CA-210
0.285±0.002
0.290±0.002
CS-1000
0.285±0.002
0.293±0.002
WARM
CA-210
0.312±0.002
0.319±0.002
CS-1000
0.314±0.002
0.324±0.002
- 15 -
VIDEO TROUBLESHOOTING & BLOCK DIAGRAM
 
 
 
 
 
 
• 
DCR DVR
- 16 -
• 
Digital B/D MUX Interface
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