DOWNLOAD LG 50PA6500-SA (CHASSIS:PB21A) Service Manual ↓ Size: 11.26 MB | Pages: 48 in PDF or view online for FREE

Model
50PA6500-SA (CHASSIS:PB21A)
Pages
48
Size
11.26 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / Plasma
File
50pa6500-sa-chassis-pb21a.pdf
Date

LG 50PA6500-SA (CHASSIS:PB21A) Service Manual ▷ View online

- 5 -
ADJUSTMENT INSTRUCTION
1. Application Range
This spec. sheet applies to PB21A chassis applied PDP TV all 
models manufactured in TV factory.
2. Specification
(1)  Because  this  is  not  a  hot  chassis,  it  is  not  necessary  to 
use an isolation transformer. However, the use of isolation 
transformer will help protect test instrument.
(2)  Adjustment  must  be  done  in  the  correct  order.  But  it  is 
flexible when its factory local problem occurs.
(3) T he adjustment must be performed in the circumstance of 
25 °C ± 5 °C of temperature and 65 % ± 10 % of relative 
humidity if there is no specific designation. 
(4)  The  input  voltage  of  the  receiver  must  keep AC  100-240 
V~, 50/60 Hz.
(5)  Before adjustment, execute Heat-Run for 5 minutes.
■  After  Receive  100%  Full  white  pattern  (06CH)  then 
process Heat-run 
   (or “8. Test pattern” condition of Ez-Adjust status)
■ How to make set white pattern
1) Press Power ON button of Service Remocon
2)  Press ADJ button of Service remocon. Select “10. Test 
pattern”  and,  after  select  “White”  using  navigation 
button, and then you can see 100% Full White pattern. 
*  In  this  status  you  can  maintain  Heat-Run  useless  any 
pattern generator
* Notice:  if  you  maintain  one  picture  over  20  minutes 
(Especially  sharp  distinction  black  with  white 
pattern  –  13Ch,  or  Cross  hatch  pattern  –  09Ch) 
then it can appear image stick near black level. 
3. Adjustment items
3.1. PCB Assembly adjustment
■ Adjust 480i Comp1 
■ Adjust 1080p Comp1/RGB 
● If it is necessary, it can adjustment at Manufacture Line
●  You  can  see  set  adjustment  status  at  “9.  ADJUST 
CHECK” of the “In-start menu” 
3.2. Set Assembly Adjustment
■ EDID (The Extended Display Identification Data )
■ Color Temperature (White Balance) Adjustment
■ Make sure RS-232C control
■ Selection Factory output option
4. PCB Assembly Adjustment
4.1. Using RS-232C
-   Adjust 3 items at 3.1. PCB assembly adjustments 
   " 4.1. ■ Adjustment sequence" one after the order.
■ Adjustment sequence
■ Necessary items before Adjustment items
● Pattern Generator : (MSPG-925FA)
●  Adjust 480i comp1 
    (MSPG-925FA:model :209, pattern :65) - comp1 Mode
●  Adjust 1080p comp1 
    (MSPG-925FA:model :225 , pattern :65) - comp1 Mode
●  Addjust RGB (MSPG-925FA:model :225 , pattern :65) 
    - RGB-Pc Mode
*  If you want more information then see the below Adjustment 
method (Factory Adjustment)
■ Adjustment sequence
● aa 00 00: Enter the ADc Adjustment mode.
● xb 00 40: change the mode to component1 (No actions)
● ad 00 10: Adjust 480i comp
● ad 00 10: Adjust 1080p comp
● xb 00 60: change to RGB-Pc mode(No action)
● ad 00 10: Adjust 1080p RGB
● xb 00 90: Endo of Adjustmennt
Order
command
Set response
1.  Inter the 
Adjustment 
mode
aa 00 00
a 00 OK00x
2.  Change the 
Source
XB 00 40
XB 00 60 
b 00 OK40x (Adjust 480i Comp1 )
                    (Adjust 1080p Comp1)
b 00 OK60x (Adjust 1080p RGB)
3.Start Adjustment ad 00 10
4.  Return the 
Response
OKx ( Success condition )
NGx ( Failed condition )
5.  Read 
    Adjustment
    data
( main )
ad 00 20 
( main )
ad 00 30
(main : component1 480i, RGB 1080p)
000000000000000000000000007c007b-
006dx
(main : component1 1080p)
000000070000000000000000007c0083
0077x
6. Confirm 
    Adjustment
ad 00 99
NG 03 00x (Failed condition)
NG 03 01x (Failed condition)
NG 03 02x (Failed condition)
OK 03 03x (Success condition)
7. End 
    of Adjustment
ad 00 90
d 00 OK90x
< See ADc Adjustment RS232c Protocol_Ver1.0 >
- 6 -
5. Factory Adjustment
->  PU21A/PB21A  :  USE  INTERNAL ADC(LM1)  :  using  internal 
pattern.
5.1.  Auto Adjust Component 480i/1080p RGB 
1080p 
■ Summary :  Adjustment  component  480i/1080i  and  RGB 
1080p is Gain and Black level setting at Analog 
to  Digital  converter,  and  compensate  the  RGB 
deviation
■ Using instrument 
●  Adjustment  remocon,  801GF(802B,  802F,  802R)  or 
MSPG925FA pattern generator
  ( It  can  output  480i/1080i  horizontal  100%  color  bar 
pattern  signal,  and  its  output  level  must  setting 
0.7V±0.1V p-p correctly)
●  You  must  make  it  sure  its  resolution  and  pattern  cause 
every instrument can have different setting
●  Adjustment  method  480i  Comp1, Adjust  1080p  Comp1/
RGB (Factory adjustment)
● ADC 480i Component1 adjustment
- Check connection of Component1 
- MSPG-925FA -> Model: 209, Pattern 65
●  Set  Component  480i  mode  and  100%  Horizontal  Color 
Bar  Pattern(HozTV31Bar),  then  set  TV  set  to 
Component1 mode and its screen to “NORMAL” 
● ADC 1080p Component1 / RGB adjustment
- Check connection both of Component1 and RGB
- MSPG-925FA -> Model: 225, Pattern 65
●  Set Component 1080p mode and 100% Horizontal Color 
Bar  Pattern(HozTV31Bar),  then  set  TV  set  to 
Component1 mode and its screen to “NORMAL” 
●  After get each the signal, wait more a second and enter 
the  “IN-START”  with  press  IN-START  key  of  Service 
remocon.  After  then  select  “7.  External  ADC”  with 
navigator button and press “Enter”. 
●  After Then  Press  key  of  Service  remocon  “Right Arrow 
(VOL+)”
● You can see “ADC Component1 Success”
● Component1 1080p, RGB 1080p Adjust is same method.
●  Component  1080p Adjustment  in  Component1  input 
mode
● RGB 1080p adjustment in RGB input mode
●  If  you  success  RGB  1080p Adjust. You  can  see  “ADC 
RGB-DTV Success”
* caution : Set Volume 0 after adjustment
-  ADJ(EZ  ADJUST)  ->  6.ADC  Calibration  ->  ADC 
Calibration(START) 
*  EDID  (The  Extended  Display  Identification  Data)/DDC 
(Display Data Channel) Download.
■ Summary
●  It is established in VESA, for communication between 
PC  and  Monitor  without  order  from  user  for  building 
user  condition.  It  helps  to  make  easily  use  realize 
“Plug and Play” function. 
● For EDID data write, we use DDC2B protocol.
- Auto Download
■ After enter Service Mode by pushing “ADJ” key,
■ Enter EDID D/L mode.
■ Enter “START” by pushing “OK” key. 
Caution: 
-  Never  connect  HDMI  &  D-sub  Cable  when  the  user 
downloading .
- Use the proper cables below for EDID Writing
< Adjustment pattern : 480i / 1080p 60Hz Pattern >
- 7 -
(PU21A)
* Edid data and Model option download(RS232)
- Manual Download 
■ Write HDMI EDID data
● Using instruments
-  Jig.  (PC  Serial  to  D-Sub  connection)  for  PC,  DDC 
adjustment.
- S/W for DDC recording (EDID data write and read)
- D-sub jack
- Additional HDMI cable connection Jig.
● Preparing and setting.
-  Set instruments and Jig. Like pic.5), then turn on PC 
and Jig. 
- Operate DDC write S/W (EDID write & read)
- It will operate in the DOS mode.
■ EDID data (Model name = LG TV)
 - RGB FHD 
- South Centural America _2D_FHD HDMI  
NO
Enter  
download MODE
EDID data Model
option download
Item
download ‘Mode In’
download
CMD 1
A
A
CMD 2
A
E
Data 0
0
00
0
10
When transfer the  
‘Mode In’,
Carry the command.
Automatically download
(The use of a internal 
pattern)
< For write EDID data, setting Jig and another instruments >
00 FF FF FF FF FF FF 00 1E 6D 01 00 01 01 01 01 
01 16 01 03 68 A0 5A 78 0A EE 91 A3 54 4C 99 26 
0F 50 54 A1 08 00 31 40 45 40 61 40 81 80 D1 C0 
01 01 01 01 01 01 1A 36 80 A0 70 38 1F 40 30 20 
25 00 40 84 63 00 00 1A 66 21 50 B0 51 00 1B 30 
40 70 36 00 40 84 63 00 00 1E 00 00 00 FD 00 3A 
3E 1E 53 10 00 0A 20 20 20 20 20 20 00 00 00 FC 
00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 00 ED 
00 FF FF FF FF FF FF 00 1E 6D 01 00 01 01 01 01 
01 16 01 03 80 A0 5A 78 0A EE 91 A3 54 4C 99 26 
0F 50 54 A1 08 00 31 40 45 40 61 40 81 80 D1 C0 
01 01 01 01 01 01 1A 36 80 A0 70 38 1F 40 30 20 
25 00 40 84 63 00 00 1A 66 21 50 B0 51 00 1B 30 
40 70 36 00 40 84 63 00 00 1E 00 00 00 FD 00 3A 
3E 1E 53 10 00 0A 20 20 20 20 20 20 00 00 00 FC 
00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 01 D4 
02 03 27 F1 4F 90 1F 04 13 05 14 03 02 12 20 22 
15 11 16 01 26 15 07 50 09 57 07 67 03 0C 00 10 
00 B8 2D E3 05 03 01 02 3A 80 18 71 38 2D 40 58 
2C 45 00 40 84 63 00 00 1E 01 1D 80 18 71 1C 16 
20 58 2C 25 00 40 84 63 00 00 9E 01 1D 00 72 51 
D0 1E 20 6E 28 55 00 40 84 63 00 00 1E 0E 1F 00 
80 51 00 1E 30 40 80 37 00 40 84 63 00 00 1C 00 
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 4B 
- 8 -
- South Centural America _2D_FHD HDMI 2
- South Centural America _2D_FHD HDMI 3
-  See Working Guide if you want more information about EDID 
communication.
- Adjustment Color Temperature(White balance)
■ Using Instruments
● Color Analyzer: CA-210 (CH 10)
-  Using LCD color temperature, Color Analyzer (CA-
210) must use CH 10, which Matrix compensated 
(White, Red, Green, Blue compensation) with CS-
2100. See the Coordination bellowed one. 
●  Auto-adjustment Equipment (It needs when Auto-adjust-
ment – It is availed communicate with RS-232C : Baud 
rate: 115200) 
●  Video Signal Generator MSPG-925F 720p, 216Gray 
(Model: 217, Pattern 78)
■ Connection Diagram (Auto Adjustment)
● Using Inner Pattern
● Using HDMI input
■ White Balance Adjustment 
If you can’t adjust with inner pattern, then you can adjust 
it using HDMI pattern. You can select option at “Ez-Adjust 
Menu – 7. White Balance” there items “NONE, INNER, 
HDMI”. It is normally setting at inner basically. If you can’t 
adjust using inner pattern you can select HDMI item, and 
you can adjust.
In manual Adjust case, if you press ADJ button of service 
remocon, and enter “Ez-Adjust Menu – 7. White Balance”, 
then automatically inner pattern operates. (In case of 
“Inner” originally “Test-Pattern. On” will be selected in The 
“Test-Pattern. On/Off”. 
● Connect all cables and equipments like Pic.5)
●  Set Baud Rate of RS-232C to 115200. It may set 115200 
orignally.
● Connect RS-232C cable to set
● Connect HDMI cable to set
< connection Diagram for Adjustment White balance >
00 FF FF FF FF FF FF 00 1E 6D 01 00 01 01 01 01 
01 16 01 03 80 A0 5A 78 0A EE 91 A3 54 4C 99 26 
0F 50 54 A1 08 00 31 40 45 40 61 40 81 80 D1 C0 
01 01 01 01 01 01 1A 36 80 A0 70 38 1F 40 30 20 
25 00 40 84 63 00 00 1A 66 21 50 B0 51 00 1B 30 
40 70 36 00 40 84 63 00 00 1E 00 00 00 FD 00 3A 
3E 1E 53 10 00 0A 20 20 20 20 20 20 00 00 00 FC 
00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 01 D4 
02 03 27 F1 4F 90 1F 04 13 05 14 03 02 12 20 22 
15 11 16 01 26 15 07 50 09 57 07 67 03 0C 00 20 
00 B8 2D E3 05 03 01 02 3A 80 18 71 38 2D 40 58 
2C 45 00 40 84 63 00 00 1E 01 1D 80 18 71 1C 16 
20 58 2C 25 00 40 84 63 00 00 9E 01 1D 00 72 51 
D0 1E 20 6E 28 55 00 40 84 63 00 00 1E 0E 1F 00 
80 51 00 1E 30 40 80 37 00 40 84 63 00 00 1C 00 
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 3B 
00 FF FF FF FF FF FF 00 1E 6D 01 00 01 01 01 01 
01 16 01 03 80 A0 5A 78 0A EE 91 A3 54 4C 99 26 
0F 50 54 A1 08 00 31 40 45 40 61 40 81 80 D1 C0 
01 01 01 01 01 01 1A 36 80 A0 70 38 1F 40 30 20 
25 00 40 84 63 00 00 1A 66 21 50 B0 51 00 1B 30 
40 70 36 00 40 84 63 00 00 1E 00 00 00 FD 00 3A 
3E 1E 53 10 00 0A 20 20 20 20 20 20 00 00 00 FC 
00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 01 D4 
02 03 27 F1 4F 90 1F 04 13 05 14 03 02 12 20 22 
15 11 16 01 26 15 07 50 09 57 07 67 03 0C 00 30 
00 B8 2D E3 05 03 01 02 3A 80 18 71 38 2D 40 58 
2C 45 00 40 84 63 00 00 1E 01 1D 80 18 71 1C 16 
20 58 2C 25 00 40 84 63 00 00 9E 01 1D 00 72 51 
D0 1E 20 6E 28 55 00 40 84 63 00 00 1E 0E 1F 00 
80 51 00 1E 30 40 80 37 00 40 84 63 00 00 1C 00 
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 2B 
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