DOWNLOAD LG 32LH240H (CHASSIS:LA96A) Service Manual ↓ Size: 6.17 MB | Pages: 40 in PDF or view online for FREE

Model
32LH240H (CHASSIS:LA96A)
Pages
40
Size
6.17 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
32lh240h-chassis-la96a.pdf
Date

LG 32LH240H (CHASSIS:LA96A) Service Manual ▷ View online

- 13 -
5. ADC Process 
5.1 PC input ADC
5.1.1 Auto RGB Gain/Offset Adjustment 
• Convert to PC in Input-source. 
• Signal equipment displays. 
Output Voltage : 700 mVp-p 
- Impress Resolution XGA (1024 x 768 @ 60Hz) 
Model : 60   in Pattern Generator 
Pattern : 65  in Pattern Generator (MSPG-925 SERISE)  
Adjustment pattern (PC) 
• Adjust by commanding AUTO_COLOR_ADJUST. 
5.1.2 Confirmation 
• We confirm whether “0xAA (RGB)” address of EEPROM
“0xA2” is “0xAA” or not.  
• If “0xAA (RGB)” address of EEPROM “0xA2” isn’t “0xAA”, we
adjust once more. 
• We can confirm the ADC values from “0xA4~0XA9 (RGB)”
addresses in a page “0xA2” 
* Manual ADC process using Service Remocon. After enter
Service Mode by pushing “ADJ” key, execute “ADC Adjust” by
pushing “•” key at “ 5. ADC Calibration” and click “Start”. 
5.2 COMPONENT input ADC  
5.2.1 Component Gain/Offset Adjustment 
• Convert to Component in Input-source. 
• Signal equipment displays.
- Impress Resolution 480i 
- 14 -
MODEL: 209   in Pattern Generator(480i Mode) 
PATTERN : 65  in Pattern Generator( MSPG-925 SERISE)  
-  Impress Resolution 1080p 
MODEL: 223   in Pattern Generator(1080p Mode) 
PATTERN: 65  in Pattern Generator( MSPG-925 SERISE) 
5.2.2 Confirmation 
• We confirm whether “0xB3 (480i)/0xBC (1080p)” address of
EEPROM “0xA2” is “0xAA” or not.  
• If  “0xB3 (480i)/0xBC(1080i)” address of EEPROM “0xA2”
isn’t “0xAA”, we adjust once more. 
• We can confirm the ADC values from “0xAD~0XB2
(480i)/0XB6~BB(1080p)” addresses in a page “0xA2” 
* Manual ADC process using Service Remocon. After enter
Service Mode by pushing “ADJ” key, execute “ADC Adjust” by
pushing “•” key at “ 5. ADC Calibration” and then click “Start”. 
- Impress Resolution 480i/1080p/RGB 
5.3 Function Check  
5.3.1 Check display and sound  
• Check Input and Signal items. ( cf. work instructions)  
1.TV 
2. AV (CVBS/ S-Video) 
3.COMPONENT (480i) 
4.RGB (PC : 1024 x 768 @ 60hz) 
5.HDMI 
6.PC Audio In and H/P Out 
* Display and Sound check is executed by Remote controller. 
5.4 EDID(The Extended Display Identification Data)
/ DDC(Display Data Channel) download
5.4.1 Overview   
It is a VESA regulation.  A PC or a MNT will display an optimal
resolution through information sharing without any necessity of
user input.  It is a realization of “Plug and Play”. 
5.4.2 Equipment   
• Adj. R/C 
• Since embedded EDID data is used, EDID download jig,
HDMI cable and D-sub cable are not need.   
5.4.3 Download method    
1) Press Adj. key On the Adj. R/C, press Adj. key then select
EDID D/L. By pressing Enter key, EDID download will
begin. 
2) If Download is successful, OK is displayed. 
3) If Download is a failure, NG is displayed. 
4) Re-try download. 
5.4.4 EDID DATA   
•Reference: Download is only possible in POWER ON MODE. 
• HDMI I [C/S: 1DBA] 
• HDMI II [C/S: 1DAA] 
• RGB   [C/S: 71FF] 
6. Final Assembly adj.  
6.1 White Balance adj. 
6.1.1 Overview 
•W/B adj.: Objective & How-it-works 
- Objective: To reduce each Panel’s W/B deviation 
- How-it-works : When R/G/B gain in the OSD is at 192, it
means the panel is at its Full Dynamic Range. 
In order to prevent saturation of Full Dynamic
range and data, one of R/G/B is fixed at 192,
and the other two is lowered to find the
desired value. 
6.1.2 Equipment  
1) Color Analyzer : CA-210 (NCG: CH 9 / WCG: CH12 /LED
Module:CH14) 
2) Adj. Computer (During auto adj., RS-232C protocol is
needed) 
3) Adj. R/C 
4) Video Signal Generator MSPG-925F 720p/216Gray
(Model:217, Pattern:78) 
-> Only when internal pattern is not available 
•Color Analyzer Matrix should be calibrated using CS-1000 
6.1.3 Equipment connection map  
6.1.4 Adj. Command (Protocol) 
•Protocol 
<Command Format> 
- LEN: Number of Data Byte to be send 
- CMD: Command 
- VAL: FOS Data 
- CS: Checksum of sent Data 
- A: Acknowledge 
Ex) [Send: JA_00_DD] / [Ack: A_00_okDDX] 
•Adj. Map 
- Applied model:  
- 15 -
Color Analyzer
Computer
RS-232C
# Pattern Generator
* If TV internal pattern is used,not needed
Signal Source
Probe
RS-232C
RS-232C
START     6E    A    50    A
      LEN    A    03    A
      CMD    A    00    A
      VAL    A    CS    A
STOP 
RS-232C COMMAND 
[CMD      ID            DATA]
Explanation 
Wb 
00 
00 
Begin White Balance adjust. 
Wb 
00 
10 
Begin Gain adjust (internal white pattern) 
Wb 
00 
1f 
End Gain adjust 
Wb 
00 
20 
Begin Offset adjust (internal white pattern) 
Wb 
00 
2f 
End Offset adjust 
Wb 
00 
ff 
End White Balance adjust(internal pattern 
disappears ) 
 Item 
Command 
(lower case ASCII) 
Data Range 
(Hex.) 
Default 
(Decimal) 
 
 
CMD1 CMD2 MIN MAX 
 
 
R Gain 
00 
C0 
TBD 
 
G Gain 
00 
C0 
TBD 
 
Gain 
j i 00 
C0 TBD 
 
Cut 
   
  TBD 
 
Cut 
   
  TBD 
 
Cool 
Cut 
   
  TBD 
 
R Gain 
00 
C0 
TBD 
 
G Gain 
00 
C0 
TBD 
 
B Gain 
00 
C0 
TBD 
 
Cut 
   
  TBD 
 
Cut 
   
  TBD 
 
Medium 
Cut 
   
  TBD 
 
R Gain 
00 
C0 
TBD 
 
G Gain 
00 
C0 
TBD 
 
B Gain 
00 
C0 
TBD 
 
Cut 
   
  TBD 
 
Warm 
Cut 
   
  TBD 
 
6.1.5 Adj. method  
6.1.5.1 Auto adj. method 
1) Set TV in adj. mode using POWER On Key  
2) Zero calibrate probe then place it on the center of the
Display 
3) Connect Cable(RS-232C) 
4) Select mode in adj. Program and begin adj. 
5) When adj. is complete (OK Sign), check adj. status per
mode    (Warm, Medium, Cool) 
6) Remove probe and RS-232C cable to complete adj. 
• Adj. must begin w/ command “wb 00 00”, and end w/“wb 00
ff”and adj. offset if needed. 
6.1.5.2 Manual adj. method 
Dynamic contrast : off 
Dynamic color : off 
OPC : Off 
Energy saving mode : Off 
1) Set TV Picture Mode to Standard and in Advanced Control,
set Dynamic Contrast and Color ‘Off’. 
2) Set TV in adj. mode using POWER On Key 
3) Press ADJ key  -> EZ adjust using adj. R/C 
4) Using CH + / - KEY, select 10.TEST PATTERN then press
Enter to place in HEAT RUN mode and wait for 30 minutes. 
5) Zero calibrate the probe of Color Analyzer, then place it on
the center of LCD module within 10 cm of the surface. 
6) Press ADJ key  -> 7. White-Balance then press the cursor
to the right (KEY 
(When 
is pressed Full White internal pattern will be
displayed) 
7) One of R Gain / G Gain / B Gain should be fixed at 192,
and the rest will be lowered to meet the desired value. 
8) Adj. is performed in COOL, MEDIUM, WARM 3 modes of
color temperature 
•If internal pattern is not available, use HDMI input.  In EZ Adj.
menu 7.White Balance, you can select one of 3 options:
None, Inner, HDMI.  Default is inner.   By selecting HDMI, you
can adjust using HDMI signal. 
• Adj. condition and cautionary items
1) Lighting condition in surrounding area 
Surrounding lighting should be lower than 10 lux.  Try to
isolate adj. area into dark surrounding. 
2) Probe location 
- LCD: Color Analyzer (CA-210) probe should be within 10cm
and perpendicular of the module surface (80°~ 100°) 
- In case of LCD, B/L on should be checked using no signal or
Full white Pattern 
6.1.6 Reference (White Balance adj. coordinate and color
temperature)  
6.1.6.1 Adjustment Preparation    
• W/B Equipment condition 
CA210: CH 9, Test signal: Inner pattern (85IRE) 
• Above 5 minutes H/run in the inner pattern. (“power on” key
of adjust remote control) 
• 15 Pin D-Sub Jack is connected to the AUTO W/B
EQUIPMENT. 
• Adjust Process will start by execute I2C Command (Inner
pattern (0xF3, 0xFF)). 
Manual White Balance adjust process using Service Remo-
con.   After enter Service Mode by pushing “ADJ” key,  enter
“White Balance” by pushing “•” key at “ 6. White Balance”.
(CA-210, CH-9) 
*Adjust “R/G/B - GAIN” by pushing “
”, “
” key at “Cool” 
*Adjust “R/G/B - GAIN” by pushing “
”, “
” key at “Medium” 
*Adjust “R/G/B - GAIN” by pushing “
”, “
” key at “Warm” 
- 16 -
Cool 11,000
K
X=0.276 ± 0.003 
Y=0.283 ± 0.003 
Medium 9,300
K
X=0.285 ± 0.003 
Y=0.293 ± 0.003 
Color 
Temperature 
Warm 6,500
K
X=0.313 ± 0.003 
Y=0.329 ± 0.003 
<Test Signal> 
Inner pattern 
 
(216gray, 85 IRE) 
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