LG INFINIA 50PK750 User manual

PLASMA TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : PU02A
MODEL : 50PK750 50PK750-UA/UF
North/Latin A erica http://aic.lgservice.co
Europe/Africa http://eic.lgservice.co
Asia/Oceania http://biz.lgservice.co
Internal Use Only
Printed in Korea
P/NO : MFL62861701(1004-REV01)

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Only or training and service purposes
CONTENTS
CONTENTS ............................................................................................................................... 2
SAFETY PRECAUTIONS ...........................................................................................................3
SPECIFICATION.........................................................................................................................4
ADJUSTMENT INSTRUCTION ..................................................................................................8
TROUBLE SHOOTING GUIDE ................................................................................................16
BLOCK DIAGRAM ...................................................................................................................48
EXPLODED VIE ...................................................................................................................49
SVC. SHEET ................................................................................................................................

- 3 - LGE Internal Use OnlyCopyright ©2010 LG Electronics Inc. All rights reserve .
Only for training an service purposes
SAFETY PRECAUTIONS
Many electrical an mechanical parts in this chassis have special safety-relate characteristics. These parts are i entifie by in
the Schematic Diagram an Explo e View.
It is essential that these special safety parts shoul be replace with the same components as recommen e in this manual to
prevent X-RADIATION, Shock, Fire, or other Hazar s.
Do not mo ify the original esign without permission of manufacturer.
General Guidance
An isolation Transformer should alwa s be used uring the
servicing of a receiver whose chassis is not isolate from the AC
power line. Use a transformer of a equate power rating as this
protects the technician from acci ents resulting in personal injury
from electrical shocks.
It will also protect the receiver an it's components from being
amage by acci ental shorts of the circuitry that may be
ina vertently intro uce uring the service operation.
If any fuse (or Fusible Resistor) in this monitor is blown, replace it
with the specifie .
When replacing a high wattage resistor (Oxi e Metal Film
Resistor, over 1 W), keep the resistor 10 mm away from PCB.
Keep wires away from high voltage or high temperature parts.
Due to high vacuum an large surface area of picture tube,
extreme care shoul be use in handling the Picture Tube.
Do not lift the Picture tube by it's Neck.
Leakage Current Cold Check(Antenna Cold Check)
With the instrument AC plug remove from AC source, connect
an electrical jumper across the two AC plug prongs. Place the
AC switch in the on position, connect one lea of ohm-meter to
the AC plug prongs tie together an touch other ohm-meter
lea in turn to each expose metallic parts such as antenna
terminals, phone jacks, etc.
If the expose metallic part has a return path to the chassis, the
measure resistance shoul be between 1 MΩ an 5.2 MΩ.
When the expose metal has no return path to the chassis the
rea ing must be infinite.
An other abnormality exists that must be correcte before the
receiver is returne to the customer.
Leakage Current Hot Check (See below Figure)
Plug the AC cor irectly into the AC outlet.
Do not use a line Isolation Transformer during this check.
Connect 1.5 K/10watt resistor in parallel with a 0.15 uF capacitor
between a known goo earth groun (Water Pipe, Con uit, etc.)
an the expose metallic parts.
Measure the AC voltage across the resistor using AC voltmeter
with 1000 ohms/volt or more sensitivity.
Reverse plug the AC cor into the AC outlet an repeat AC
voltage measurements for each expose metallic part. Any
voltage measure must not excee 0.75 volt RMS which is
correspon s to 0.5 mA.
In case any measurement is out of the limits specifie , there is
possibility of shock hazar an the set must be checke an
repaire before it is returne to the customer.
Leakage Current Hot Check circuit
1.5 Kohm/10W
To Instrument's
expose
METALLIC PARTS
Goo Earth Groun
such as WATER PIPE,
CONDUIT etc.
AC Volt-meter
IMPORTANT SAFETY NOTICE
0.15uF

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Only or training and service purposes
SPECIFICATIONS
NOTE : Speci ications and others are subject to change without notice or improvement .
1. Application Range
(1) This spec sheet is applied all o PDP TV with PU02A chassis.
2. Specification
Each part is tested as below without special appointment.
(1) Temperature : 25 °C ± 5 °C (77 °F ± 9 °F), CST : 40 °C ± 5 °C
(2) Relative Humidity : 65 % ± 10 %
(3) Power Voltage : Standard input voltage (100 V - 240 V ~ 50 / 60 Hz)
* Standard Voltage o each product is marked by models
(4) Speci ication and per ormance o each parts are ollowed each drawing and speci ication by part number in accordance with
BOM.
(5) The receiver must be operated or about 5 minutes prior to the adjustment.
3. Test Method
(1) Per ormance : LGE TV test method ollowed.
(2) Demanded other speci ication
Sa ety : UL, CSA, IEC speci ication, CE
EMC : FCC, ICES, IEC speci ication, CE
Model Name
50PK750-UA
50PK750-UF
Remark
Sa ety : UL1492, CSA C22.2.No.1
EMC : FCC Class B, IC Class B
Market
NORTH AMERICA
CANADA / MEXICO
Model Name
50PK750-UA
50PK750-UF
Brand
LG
LG
Market
NORTH AMERICA
CANADA / MEXICO

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Only or training and service purposes
4. General Specification
No Item Speci ication Remark
1. Receiving System 1) ATSC / NTSC-M
2. Available Channel 1) VHF : 02~13
2) UHF : 14~69
3) DTV : 02-69
4) CATV : 01~135
5) CADTV : 01~135
3. Input Voltage 1) AC 100 V - 240 V ~ 50 / 60 Hz N.America Mark : 110V, 60Hz
4. Market NORTH AMERICA, KOREA
5. Screen Size 127 cm (50 inch) Wide(1920 ×1080) 50PK750-UA/F, 50PK950-UA/F
152 cm (60 inch) Wide(1920 ×1080) 60PK750-UA/F, 60PK950-UA/F
6. Aspect Ratio 16:9
7. Tuning System FS
8. PDP Module PDP50R1#### (1920 ×1080) 50PK750-UA/F, 50PK950-UA/F
PDP60R1#### (1920 ×1080) 60PK750-UA/F, 60PK950-UA/F
9. Operating Environment 1) Temp : 0 deg ~ 40 deg
2) Humidity : ~ 80 %
10. Storage Environment 1) Temp : -20 deg ~ 60 deg
2) Humidity : ~ 85 %

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Only or training and service purposes
No Resolution H- req(kHz) V- req.(kHz) Proposed
1. 720*480 15.73 60 SDTV ,DVD 480I
2. 720*480 15.73 59.94 SDTV ,DVD 480I
3. 720*480 31.50 60 SDTV 480P
4. 720*480 31.47 59.94 SDTV 480P
5. 1280*720 45.00 60.00 HDTV 720P
6. 1280*720 44.96 59.94 HDTV 720P
7. 920*1080 33.75 60.00 HDTV 1080I
8. 1920*1080 33.72 59.94 HDTV 1080I
9. 1920*1080 67.500 60 HDTV 1080P
10. 1920*1080 67.432 59.94 HDTV 1080P
11. 1920*1080 27.000 24.000 HDTV 1080P
12. 1920*1080 26.97 23.976 HDTV 1080P
13. 1920*1080 33.75 30.000 HDTV 1080P
14. 1920*1080 33.71 29.97 HDTV 1080P
No Resolution H- req(kHz) V- req.(Hz) Pixel clock(MHz) Proposed
PC DDC
1. 640*350 31.468 70.09 25.17 EGA X
2. 720*400 31.469 70.08 28.32 DOS X
3. 640*480 31.469 59.94 25.17 VESA(VGA) 0
4. 800*600 37.879 60.31 40.00 VESA(SVGA) 0
5. 1024*768 48.363 60.00 65.00 VESA(XGA) 0
6. 1280*768 47.776 59.87 79.5 CTV(WXGA) 0
7. 1360*768 47.712 60.015 85.50 VESA (WXGA) X
8. 1280*1024 63.981 60.020 108.00 VESA (SXGA) 0
9. 1920*1080 66.587 59.934 148.50 HDTV 1080P 0
5. Component Input (Y, CB/PB, CR/PR)
6. RGB Input (PC)

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Only or training and service purposes
No Resolution H- req(kHz) V- req.(Hz) Pixel clock(MHz) Proposed
PC DDC
1 640*350 31.468 70.09 25.17 EGA X
2 720*400 31.469 70.08 28.32 DOS 0
3 640*480 31.469 59.94 25.17 VESA(VGA) 0
4 800*600 37.879 60.31 40.00 VESA(SVGA) 0
5 1024*768 48.363 60.00 65.00 VESA(XGA) 0
6 1280*768 47.776 59.87 79.5 CTV(WXGA) X
7 1360*768 47.712 60.015 85.50 VESA (WXGA) 0
8 1280*1024 63.981 60.020 108.00 VESA (SXGA) 0
9 1920*1080 67.5 60 148.5 HDTV 1080P 0
DTV
1 720*480 31.47 60 27.027 SDTV 480P
2 720*480 31.47 59.94 27.00 SDTV 480P
3 1280*720 45.00 60.00 74.25 HDTV 720P
4 1280*720 44.96 59.94 74.176 HDTV 720P
5 1920*1080 33.75 60.00 74.25 HDTV 1080I
6 1920*1080 33.72 59.94 74.176 HDTV 1080I
7 1920*1080 67.500 60 148.50 HDTV 1080P
8 1920*1080 67.432 59.94 148.352 HDTV 1080P
9 1920*1080 27.000 24.000 74.25 HDTV 1080P
10 1920*1080 26.97 23.976 75.176 HDTV 1080P
11 1920*1080 33.75 30.000 74.25 HDTV 1080P
12 1920*1080 33.71 29.97 74.176 HDTV 1080P
7. HDMI Input(PC/DTV)

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ADJUSTMENT INSTRUCTION
1. Application Range
This spec. sheet applies to PU02A Chassis applied PDP TV
all models manu actured in TV actory.
2. Specification
(1) Because this is not a hot chassis, it is not necessary to use
an isolation trans ormer. However, the use o isolation
trans ormer will help protect test instrument.
(2) Adjustment must be done in the correct order.
(3) The adjustment must be per ormed in the circumstance o
25 cC ± 5 cC o temperature and 65 % ± 10 % o relative
humidity i there is no speci ic designation.
(4) The input voltage o the receiver must keep 100 V - 240 V,
50 / 60 Hz.
(5) The receiver must be operated or about 5 minutes prior to
the adjustment when module is in the circumstance o over
15 cC
- In case o keeping module is in the circumstance o 0 cC,
it should be placed in the circumstance o above 15 cC or
2 hours
- In case o keeping module is in the circumstance o below
-20 cC, it should be placed in the circumstance o above
15 cC or 3 hours.
Caution) When still image is displayed or a period o 20 minutes
or longer (especially where W/B scale is strong. Digital
pattern 13ch and/or Cross hatch pattern 09ch), there
can some a terimage in the black level area.
3. Adjustment items
3-1. Board-level adjustment
- Mac address and Id ile(ESN) Download
- Adjust 480i Comp1 adj.
- Adjust 1080p Comp1 adj.
- Adjust 1920*1080 RGB adj.
- EDID/DDC download
Above adjustment items can be also per ormed in Final
Assembly i needed. Both Board-level and Final assembly
adjustment items can be check using In-Start Menu 1.
Adjust Check.
3-2. Final assembly adjustment
- White Balance adjustment
- RS-232C unctionality check
- Factory Option setting per destination
- Ship-out mode setting (In-Stop)
3-3. Etc.
- Ship-out mode
- Service Option De ault
- USB Download(S/W Update, Option)
4. MAC Address and ESN Key rite
4-1. Equipment & Condition
- Play ile: Serial.exe
- MAC Address edit
- Input Start / End MAC address
4-2. Download method
(1) Communication Prot connection
Connect: PCBA Jig-> RS-232C Port== PC-> RS-232C Port
(2) MAC Address Download
- Com 1,2,3,4 and 115200(Baudrate)
- Port connection button click(1)
- Load button click(2) or MAC Address write.
- Start MAC Address write button(3)
- Check the OK Or NG
(3) Input the ESN Key
- download Model sending Key ile
- input by 1 by SET so as not to be duplicated

5. LAN PORT + ESN INSPECTION
5-1. Equipment & Condition
- Each other connection to LAN Port o IP Hub and Jig
5-2. MAC Address & ESN Key confirmation
- Push “IN-START” Key in service remote controller.
5-3. LAN PORT INSPECTION(PING TEST)
- LAN Port connection with PCB
- Network setting at MENU Mode o TV
- setting automatic IP
- Setting state con irmation
-> I automatic setting is inished, you con irm IP and MAC
Address.
- remove LAN CABLE
6. ADC adjustment
6-1. Overview
ADC adjustment is needed to ind the optimum black level and
gain in Analog-to-Digital device and to compensate RGB
deviation.
6-2. Equipment & Condition
(1) Jig (RS-232C protocol)
(2). Internal pattern is used. No external signal is needed.
6-3. Adjustment
(1) Adj. protocol
(2) Check adjust device
Pattern Generator : (MSPG-925FA)
Adjust 480i Comp1
(MSPG-925FA:model :209 , pattern :65)
Adjust 1080p Comp1
(MSPG-925FA:model :225 , pattern :65)
Adjust RGB (MSPG-925FA:model :225 , pattern :65)
The PU02A have not ECHO.
7. EDID(The Extended Display
Identification Data) / DDC(Display
Data Channel) download
7-1. Overview
It is a VESA regulation. A PC or a MNT will display an optimal
resolution through in ormation sharing without any necessity
o user input. It is a realization o °∞Plug and Play°±.
7-2. Equipment
- Adj. R/C
- Since embedded EDID data is used, EDID download jig,
HDMI cable and D-sub cable are not need.
7-3. 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) I Download is success ul, OK is displayed.
(3) I Download is a ailure, NG is displayed.
(4) Re-try download
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Only or training and service purposes

7-4. EDID DATA(PCM)
- Re erence: Download is only possible in POWER ON
MODE.
HDMI 1[C/S: 9DEE]
EDID Block 0, Bytes 0-127 [00H-7FH]
Block Type: EDID 1.3
EDID Block 1, Bytes 128-255 [80H-FFH]
Block Type: CEA EDID Timing Extension Version 3
HDMI 2 [C/S: 9DDE]
EDID Block 0, Bytes 0-127 [00H-7FH]
Block Type: EDID 1.3
EDID Block 1, Bytes 128-255 [80H-FFH]
Block Type: CEA EDID Timing Extension Version 3
HDMI 3 [C/S: 9DCE]
EDID Block 0, Bytes 0-127 [00H-7FH]
Block Type: EDID 1.3
EDID Block 1, Bytes 128-255 [80H-FFH]
Block Type: CEA EDID Timing Extension Version 3
HDMI 4 [C/S: 9DBE]
EDID Block 0, Bytes 0-127 [00H-7FH]
Block Type: EDID 1.3
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Only or training and service purposes
01234 56789ABCDEF
0 00FFFFFFFFFFFF001E6D010001010101
10 01 14 01 03 80 10 09 78 0A EE 91 A3 54 4C 99 26
20 0F 50 54 A1 08 00 31 40 45 40 61 40 81 80 01 01
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0 02031CF1478405030220221023090707
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0 1 2 3 4 5 6 7 8 9 A B C D E F
0 00 FF FF FF FF FF FF 00 1E 6D 01 00 01 01 01 01
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