DOWNLOAD LG 50PB2RRH-TL (CHASSIS:MF-056L) Service Manual ↓ Size: 15.69 MB | Pages: 55 in PDF or view online for FREE

Model
50PB2RRH-TL (CHASSIS:MF-056L)
Pages
55
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15.69 MB
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PDF
Document
Service Manual
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Device
TV / Plasma
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50pb2rrh-tl-chassis-mf-056l.pdf
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LG 50PB2RRH-TL (CHASSIS:MF-056L) Service Manual ▷ View online

- 9 -
5. Auto AV(CVBS) Color Balance
5-1. Requirement
This  AV  color  balance  adjustment  should  be  performed
before White Balance Adjustment.
It is very import to use correct adjustment pattern like (Fig.5).
Within  the  pattern,  color  sequence  should  be  aligned  :
W-Y-C-G-M-R-BLUE-BLACK.
(If  color  sequence  is  reversed  (Black  ->...->  White),
reverse  the  pattern  with  REV  key,  when  using  Master
pattern generator like MSPG-925)
If Minimum Black Level and/or Maximum White Level is
not correct, Do select 100% Color Bar Pattern.
5-2. Required Test Equipment
1) Remote controller for adjustment
2)  AV  Pattern  Generator  :  802F  Pattern  Generator,
Master(MSPG-925FA), etc.
(Which  has  PAL  Composite  Video  format  output  with
standard(1.0 Vpp) Vertical 100% Color Bar Pattern as Fig. 5)
5-3. Method of Auto RGB Color Balance
1)  Input  the  PAL  Composite  Video  (Fig.5.  100%  Color  Bar
Pattern) into video input. ( 42/50PC1RR-CL : AV2 )
2) Set the PSM to Dynamic mode in Picture menu.
3) Press IN-START key on R/C for adjustment.
4) Press the 
(Vol.+) key operate to set , then it becomes
automatically.
5) Auto-RGB OK means completed adjustment.
6. Auto Component Color Balance
6-1. Requirement
It is very import to use correct adjustment pattern like (Fig.6).
Within  the  pattern,  color  sequence  should  be  aligned  :
W-Y-C-G-M-R-BLUE-BLACK.
(If  color  sequence  is  reversed  (Black  ->...->  White),
reverse  the  pattern  with  REV  key,  when  using  Master
pattern generator like MSPG-925)
If Minimum Black Level and/or Maximum White Level is
not correct, Do select 100% Color Bar Pattern.
6-2. Required Test Equipment
1) Remote controller for adjustment.
2) 802F Pattern Generator.
( Which has 720p YpbPr output with Standard(0.7Vpp)Vertical
100% Color Bar Pattern as Fig. 6 )
6-3. Method of Auto Component Color Balance
1) Input the Component 720p 100% Color Bar signal into
Component1.
2) Set the PSM to Dynamic mode in Picture menu.
3) Press 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 completed adjustment.
7. Auto RGB Color Balance
7-1. Requirement
It is very import to use correct adjustment pattern like (Fig. 7).
Within  the  pattern,  color  sequence  should  be  aligned  :
W-Y-C-G-M-R-BLUE-BLACK.
(If  color  sequence  is  reversed  (Black  ->...->  White),
reverse  the  pattern  with  REV  key,  when  using  Master
pattern generator like MSPG-925)
If Minimum Black Level and/or Maximum White Level is
not correct, Do select 100% Color Bar Pattern.
7-2. Required Test Equipment
1) Remote controller for adjustment
2) 802F Pattern Generator, Master (MSPG-925FA), etc.
(  Which  has  XGA  60Hz  PC  Format  output  with
standard(0.7Vpp) 100 % Color Bar Pattern as Fig. 7 )
7-3. Method of Auto RGB Color Balance
1) Input the PC 1024x768 @ 60Hz 100 % Color Bar Pattern
into RGB.
2) Set the PSM to Dynamic mode in Picture menu.
3) Press IN-START key on R/C for adjustment. 
4) Press the 
(Vol.+) key operate To set , then it becomes
automatically.
5) Auto-RGB OK means completed adjustment.
8. Auto DVR Color Balance
8-1. Requirement
It is very import to use correct adjustment pattern like (Fig. 8).
Within  the  pattern,  color  sequence  should  be  aligned  :
W-Y-C-G-M-R-BLUE-BLACK.
(If  color  sequence  is  reversed  (Black  ->...->  White),
reverse  the  pattern  with  REV  key,  when  using  Master
pattern generator like MSPG-925)
If Minimum Black Level and/or Maximum White Level is
not correct, Do select 100% Color Bar Pattern.
(Fig. 5) Auto AV(CVBS) Color Balance Test Pattern
(Fig. 6) Auto Component Color Balance Test Pattern
(Fig. 7) Auto RGB Color Balance Test Pattern
- 10 -
8-2. Required Test Equipment
1) Remote controller for adjustment
2) 802F Pattern Generator, Master (MSPG-925FA), etc.
( Which has 576i YpbPr output with Standard(0.7Vpp)Vertical
100% Color Bar Pattern as Fig.8)
8-3. Method of Auto Component Color Balance
1) Input the Component 576i 100% Color Bar signal into
Component1.
2) Set the PSM to Dynamic mode in Picture menu.
3) Press IN-START and then TURBO-PICTURE 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) If the result is “NG’, Try once more.
9. Checking DVR Function and HDD
9-1. Time Shift
1) Press ‘OK’ button and check Time Shift is working through
Progress bar is on.
2) Press         after the time is 0:00:02 on the bar and check
previous picture for a few seconds.
( just         ,        is working under 30seconds)
3) Press         and check a live picture back.
9-2. Recoding
1) Time setting : 
(1) Set any time on the MENU for recoding.
(Recoding can’t be done under the Time is not active. 
When main power is off , the time will be resetted.)
2) Manual Recoding : 
(1) Set recoding information and check it on the scheduled
list.
3)  Instant Recoding.
(1) Press the recoding button on remote control and record
a present program for 10 seconds then press the stop
button to stop recoding.
(2) After finishing recoding, play the recoded clip on ’the
Recoded TV’. 
(Fig. 8) Auto DVR Color Balance Test Pattern
(Fig. 9) DVR MENU
(Fig. 10) Time Shift Progress bar
(Fig. 11) DVR MENU
(Fig. 12) Scheduled List
(Fig. 13) Xstudio PRO MENU
(Fig. 14) Recoded List
- 11 -
10. POWER PCB Assy Voltage
Adjustments 
(Va, Vs Voltage adjustments)
10-1. Test Equipment :
D.M.M. 1EA
10-2. Connection Diagram for Measuring
: refer to Fig.15
10-3. Adjustment Method
(1) Va Adjustment
1) After receiving 100% Full White Pattern, HEAT RUN.
2) Connect + terminal of D. M..M. to Va pin of P805, connect
-terminal to GND pin of P805.
3)  After  turning  VR901,voltage  of  D.M.M  adjustment  as
same  as  Va  voltage  which  on  label  of  panel  right/top.
(deviation; 
±0.5V)
(2) Vs Adjustment
1) Connect + terminal of D. M..M. to Vs pin of P805, connect
-terminal to GND pin of P805.
2)  After  turning  VR951,  voltage  of  D.M.M  adjustment  as
same  as  Vs  voltage  which  on  label  of  panel  right/top.
(deviation ; 
±0.5V)
11. EDID (The Extended Display
Identification Data)/ DDC (Display
Data Channel) download
11-1. Required Test Equipment
1) Adjusting PC with S/W for writing EDID Data.
(S/W : EDID TESTER Ver.2.5)
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.
11-2. Setting of device
11-3. Preparation for Adjustment
1) As above Fig. 16, Connect the Set, EDID Download Jig, PC
& Cable.
2)  Turn  on  the  PC  &  EDID  Download  Jig.  And  Execute  the
S/W : EDID TESTER Ver,2.5.
3) Set up S/W option.
Repeat Number : 5
Device Address : A0
PageByte : 8
4) Power on the Set.
11-4. Sequence of Adjustment
(1) DDC data of Analog-RGB
1) Init the data.
2) Load the EDID data.(Open File).
[Analog(RGB) :
50PC1RR_RGB(B4)0307.ana] (VGA,XGA)
[Digital(HDMI):
50PC1RR_HDMI(DC37)_0307.div] (XGA)
3) Set the S/W as below.
4) Push the “Write Data & Verify”button. And confirm “Yes”.
5) If the writing is finished, you will see the “OK” message.
(Fig. 15) Connection Diagram of power adjustment for measuring.
(Fig. 16) Connection Diagram of DDC download
Open File
Open File
- 12 -
6) HDMI/DVI EDID data(check sum : DC37)
7) RGB EDID data(check sum : B4)
12. Adjustment of White Balance
12-1. Required Equipment
1) Remote controller for adjustment.
2) Color Analyzer.(CA-100 or same product)
3) Auto W/B adjustment instrument.(only for Auto adjustment)
4) AV Pattern Generator.
12-2. Connecting diagram of equipment for
measuring (For Auto Adjustment)
W
Auto adjustment Map(RS-232C)
12-3. Adjustment of White Balance
(For Manual adjustment)
O
Operate  the  zero-calibration  of  the  CA-100,  then  stick
sensor to PDP module surface when you adjust.
O
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)  As  below  Fig.18,  Supply  216Level  (85  IRE)  full  screen
pattern to Video input.
(50PB2RR-TL : AV1/AV2, Press the Front AV key->AV2) 
3) Press the TV/AV KEY on R/C for converting input mode.
4) Set the PSM to Standard mode in Picture menu.
5) Enter the White Balance adjustment mode by pressing the
IN-START key twice(White Balance) on R/C.
6) Stick sensor to center of the screen and select each items
(Red/Green/Blue Gain and Offset) using 
D
/
E
(CH +/-) key on R/C.
7)  Adjust  Only  High  Light  with  R  Gain/  B  Gain  using 
F
/
G
(VOL+/-) key on R/C.
8) Adjust it until color coordination becomes as below.
(Initially, R/G/B gain and R/G/B offset values are fixed as below
Red Gain   : 82,
Green Gain   : 80,
Blue Gain   : 86
Red Offset : 7F,
Green Offset : 7E,
Blue Offset : 82)
9)  When  adjustment  is  completed,  Exit  adjustment  mode
using EXIT key on R/C.
M SPG-
M STG- 5 2 0 0
216 Level (85 IRE)
216 Level (85 IRE)
COLOR 
COLOR ANAL
ANALYZER
YZER
TYPE ; CA-100
TYPE ; CA-100
CVBS
CVBS
signal
signal
input
input
RS-232C Serial Communication
925
Pattern Generator
Pattern Generator
/
(Fig. 17) Connection Diagram of Auto W/B Adjustment
Type
Baud Rate
115200
Index
R Gain
G Gain
B Gain
R Offset
G Offset
B Offset
Data bit
8
Cmd1 Cmd2
j
a
j
b
j
c
j
d
j
e
j
f
Stop bit
1
Parity
NONE
MF-056L
Protocol
Setting
Data
Min Value
00(00)
00(00)
00(00)
00(00)
00(00)
00(00)
Max Value
255(FF)
255(FF)
255(FF)
255(FF)
255(FF)
255(FF)
(Fig. 18) Pattern for Adjustment of White Balance
216 Level (85 IRE)
216 Level (85 IRE)
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