50PJ250R-TA, 50PJ251R-TB (CHASSIS:PP01A) — LG TV Service Manual (repair manual)

Model
50PJ250R-TA 50PJ251R-TB (CHASSIS:PP01A)
Pages
34
Size
13.43 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / Plasma
File
50pj250r-ta-50pj251r-tb-chassis-pp01a.pdf
Date

View LG 50PJ250R-TA / 50PJ251R-TB (CHASSIS:PP01A) Service Manual online

PLASMA TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : PP01A
MODEL : 50PJ250R
50PJ250R-TA
MODEL :
50PJ251R
50PJ251R-TB
P/NO : MFL62881414(1008-REV01)
- 2 -
CONTENTS
CONTENTS ............................................................................................................................... 2
SAFETY PRECAUTIONS ...........................................................................................................3
SPECIFICATION.........................................................................................................................4
ADJUSTMENT INSTRUCTION ..................................................................................................7
BLOCK DIAGRAM ...................................................................................................................15
EXPLODED VIEW  .................................................................................................................. 16
SVC. SHEET  ................................................................................................................................
- 3 -
SAFETY PRECAUTIONS
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by      in
the Schematic Diagram and Exploded View. 
It  is  essential  that  these  special  safety  parts  should  be  replaced  with  the  same  components  as  recommended  in  this  manual  to
prevent X-RADIATION, Shock, Fire, or other Hazards. 
Do not modify the original design without permission of manufacturer.
General Guidance
An  isolation  Transformer  should  always  be  used during  the
servicing of a receiver whose chassis is not isolated from the AC
power  line.  Use  a  transformer  of  adequate  power  rating  as  this
protects the technician from accidents resulting in personal injury
from electrical shocks.
It  will  also  protect  the  receiver  and  it's  components  from  being
damaged  by  accidental  shorts  of  the  circuitry  that  may  be
inadvertently introduced during the service operation.
If any fuse (or Fusible Resistor) in this monitor is blown, replace it
with the specified.
When  replacing  a  high  wattage  resistor  (Oxide  Metal  Film
Resistor, over 1W), keep the resistor 10mm away from PCB.
Keep wires away from high voltage or high temperature parts.
Due  to  high  vacuum  and  large  surface  area  of  picture  tube,
extreme care should be used 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  removed  from  AC  source,  connect
an  electrical  jumper  across  the  two  AC  plug  prongs.  Place  the
AC  switch  in  the  on  position,  connect  one  lead  of  ohm-meter  to
the  AC  plug  prongs  tied  together  and  touch  other  ohm-meter
lead  in  turn  to  each  exposed  metallic  parts  such  as  antenna
terminals, phone jacks, etc. 
If the exposed metallic part has a return path to the chassis, the
measured resistance should be between 1MΩ and 5.2MΩ. 
When  the  exposed  metal  has  no  return  path  to  the  chassis  the
reading must be infinite.
An  other  abnormality  exists  that  must  be  corrected  before  the
receiver is returned to the customer.
Leakage Current Hot Check 
(See below Figure) 
Plug the AC cord directly into the AC outlet.
Do not use a line Isolation Transformer during this check. 
Connect  1.5K/10watt  resistor  in  parallel  with  a  0.15uF  capacitor
between a known good earth ground (Water Pipe, Conduit, etc.)
and the exposed metallic parts.
Measure  the  AC  voltage  across  the  resistor  using  AC  voltmeter
with 1000 ohms/volt or more sensitivity.
Reverse  plug  the  AC  cord  into  the  AC  outlet  and  repeat  AC
voltage  measurements  for  each  exposed  metallic  part.  Any
voltage  measured  must  not  exceed  0.75  volt  RMS  which  is
corresponds to 0.5mA.
In  case  any  measurement  is  out  of  the  limits  specified,  there  is
possibility  of  shock  hazard  and  the  set  must  be  checked  and
repaired before it is returned to the customer.
Leakage Current Hot Check circuit
1.5 Kohm/10W
To Instrument's
exposed 
METALLIC PARTS
Good Earth Ground
such as WATER PIPE,
CONDUIT etc.
AC Volt-meter
IMPORTANT SAFETY NOTICE
0.15uF
- 4 -
SPECIFICATION
NOTE : Specifications and others are subject to change without notice for improvement.
V
Application Range
This spec is applied to PDP TV used PP01A  Chassis.
Specification
Each part is tested as below without special appointment.
(1) Temperature : 25 °C ± 5 °C (77 °F ± 9 °F), CST : 40 ± 5
(2) Relative Humidity: 65 % ± 10 %
(3) Power Voltage: Standard Input voltage (100 V - 240 V~, 50 / 60 Hz)
* Standard Voltage of each product is marked by models.
(4) Specification  and  performance  of  each  parts  are  followed  each  drawing  and  specification  by  part  number  in  accordance  with
SBOM.
(5) The receiver must be operated for about 20 minutes prior to the adjustment.
V
Test Method
(1) Performance : LGE TV test method followed.
(2) Demanded other specification 
Safety : CE, IEC specification
EMC : CE, IEC
V
Module Specification
(1) 50” WXGA
50PJ250R-TA
ASIA
LG
Model Name
Market
Brand
Model Name
50PJ250R-TA
Remark
Safety : IEC/ EN60065, EMI : CISPR13
Market
NON-EU
Appliance
TEST
Display Screen Device
Aspect Ratio
PDP Module
Operating Environment
Storage Environment
Input Voltage
1
2
3
4
5
6
No
Item
Specification
Remark
127 cm (50 inch) 16: 9 Color Plasma Display Module 
16:9
PDP50T1###,
RGB Closed(Well) Type 
1) Temp. : 0 deg ~ 55 deg
2) Humidity : 20 % ~ 80 %
3) Temp. : -10 deg ~ 60 deg
4) Humidity : 10 % ~ 90 %
AC 100 V - 240 V, 50 / 60 Hz
PDP
Glass Filter
LGE SPEC.
Maker : LGIT
- 5 -
V
Model General Specification
(1) NON-EU (TA)
No
Item
Specification
Remark
1
Market
NON EU 
2
Broadcasting system
PAL/SECAM-BG/I/DK, NTSC-M
3
Available Channel
BAND
PAL
NTSC
China(DK)
Australia(BG) 
VHF/UHF
E2~C69
2~78
VHF/UHF
C1~C62
C1~C75
CATV
S21~S47
1~71
CATV
S1~S41
S2~S44
4
Receiving system
Upper Heterodyne
5
Video Input (2EA)
PAL,SECAM, NTSC
Rear 1EA, Side 1EA
6
Component Input (2EA)
Y/Cb/Cr, Y/ Pb/Pr
7
RGB Input (1EA)
RGB-PC 
8
HDMI Input              2ea
HDMI-DTV , Only PCM MODE
Side HDMI(1), Rear HDMI(1) 
: 42/50PJ250-TA only
3ea
Side HDMI(1), Rear HDMI(2)
9
Audio Input (5EA)
L/R Input(PC 1EA, Component 2EA, 
Rear 1EA, Side 1EA)
10
RS-232C (1EA)
Remote control 
11
USB Input (1EA)
SD DivX, MP3, JPEG,
PJ250R Rear USB only for service

Download LG 50PJ250R-TA / 50PJ251R-TB (CHASSIS:PP01A) Service Manual (Repair Manual)

Here you can view online or download LG 50PJ250R-TA / 50PJ251R-TB (CHASSIS:PP01A) Service Manual in pdf. This Service Manual can help you recover, restore, fix, disassemble and repair LG 50PJ250R-TA / 50PJ251R-TB (CHASSIS:PP01A) Plasma. Information contained in LG 50PJ250R-TA / 50PJ251R-TB (CHASSIS:PP01A) service manual (repair manual) typically includes:

  • Disassembly, troubleshooting, programming, maintenance, remote, adjustment, installation and setup instructions.
  • Schematics, wiring and block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Parts list (bill of materials).