LG 50PT350 Series User manual

PLASMA TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : PD11K
MODEL : 50PT350/351/351A/351K/
50PT351N/352/
50PT353/353A/353K/353N
50PT350-ZD/50PT351/351A/351K-ZC/
50PT351N-ZC/50PT352-ZB/
50PT353/353A/353K/353N-ZA
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 : MFL67013001(1101-REV00)

- 2 - LGE Internal Use OnlyCopyright ©2011 LG Electronics Inc. All rights reserved.
Only or training and service purposes
CONTENTS
CONTENTS ............................................................................................................................... 2
SAFETY PRECAUTIONS ...........................................................................................................3
SPECIFICATION.........................................................................................................................4
ADJUSTMENT INSTRUCTION ..................................................................................................6
BLOCK DIAGRAM ...................................................................................................................14
EXPLODED VIEW ..................................................................................................................15
CIRCUIT DIAGRAM .....................................................................................................................

- 3 - LGE Internal Use OnlyCopyright ©2011 LG Electronics Inc. All rights reserved.
Only or training and service purposes
SAFETY PRECAUTIONS
Many electrical and mechanical parts in this chassis have special sa ety-related characteristics. These parts are identi ied by in
the Schematic Diagram and Exploded View.
It is essential that these special sa ety parts should be replaced with the same components as recommended in this manual to
prevent X-RADIATION, Shock, Fire, or other Hazards.
Do not modi y the original design without permission o manu acturer.
G n ral Guidanc
An isolation Transform r should always b us d during the
servicing o a receiver whose chassis is not isolated rom the AC
power line. Use a trans ormer o adequate power rating as this
protects the technician rom accidents resulting in personal injury
rom electrical shocks.
It will also protect the receiver and it's components rom being
damaged by accidental shorts o the circuitry that may be
inadvertently introduced during the service operation.
I any use (or Fusible Resistor) in this monitor is blown, replace it
with the speci ied.
When replacing a high wattage resistor (Oxide Metal Film
Resistor, over 1W), keep the resistor 10mm away rom PCB.
Keep wires away rom high voltage or high temperature parts.
Due to high vacuum and large sur ace area o picture tube,
extreme care should be used in handling th Pictur Tub .
Do not li t the Picture tube by it's Neck.
L akag Curr nt Cold Ch ck(Ant nna Cold Ch ck)
With the instrument AC plug removed rom AC source, connect
an electrical jumper across the two AC plug prongs. Place the
AC switch in the on position, connect one lead o 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.
I 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 in inite.
An other abnormality exists that must be corrected be ore the
receiver is returned to the customer.
L akag Curr nt Hot Ch ck (S b low Figur )
Plug the AC cord directly into the AC outlet.
Do not us a lin Isolation Transform r during this ch ck.
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 or 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 o the limits speci ied, there is
possibility o shock hazard and the set must be checked and
repaired be ore it is returned to the customer.
L akag Curr nt Hot Ch ck 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 - LGE Internal Use OnlyCopyright ©2011 LG Electronics Inc. All rights reserve .
Only for training an service purposes
SPECIFICATION
NOTE : Specifications an others are subject to change without notice for improvement .
VApplication Range
This spec is applie to PDP TV use PD11K Chassis.
V Specification
Each part is teste as below without special appointment.
(1) Temperature : 25 °C ± 5 °C (77 °F ± 9 °F), CST : 40 ± 5
(2) Relative Humi ity: 65 % ± 10 %
(3) Power Voltage: Stan ar Input voltage (100 V - 240 V ~, 50 / 60 Hz)
* Stan ar Voltage of each pro uct is marke by mo els.
(4) Specification an performance of each parts are followe each rawing an specification by part number in accor ance with
SBOM.
(5) The receiver must be operate for about 20 minutes prior to the a justment.
VTest Method
(1) Performance : LGE TV test metho followe .
(2) Deman e other specification
Safety : CE, IEC specification, EMC : CE, IEC
VModule Specification
(1) 2D - 50” HD
No Item Specification Remark
1 Display Screen Device 127 cm (50 inch) wi e Color Display Mo ule PDP
2 Aspect Ratio 16:9
3 PDP Mo ule PDP50T3####,
RGB Close (Well) Type, Glass Filter (38%)
Pixel Format: 1024 horiz. By 768 ver
4 Operating Environment 1) Temp. : 0 eg ~ 40 eg
2) Humi ity : 20 % ~ 80 %
5 Storage Environment 3) Temp. : -20 eg ~ 60 eg LGE SPEC
4) Humi ity : 10 % ~ 90 %
6 Input Voltage AC 100 V ~ 240 V, 50 / 60 Hz Maker LG
Mo el Name
50PT350-ZD
50PT351/351A/351K/351N-ZC
50PT352-ZB
50PT353/353A/353K/353N-ZA
Bran
LG
Market
Albania, Austria, Belgium, Bosnia, Bulgaria, Coratia, Czech, Denmark,
Estonia, Finlan , France, Germany, Greece, Hungary, Irelan , Italy,
Kazakhstan, Latvia, Lithuania, Luxembourg, Morocco, Netherlan s, Norway,
Polan , Portugal, Romania, Russia, Serbia, Slovakia, Slovenia, Spain,
Swe en, Switzerlan , Turkey, Ukraine, UK
Mo el Name
50PT350-ZD
50PT351/351A/351K/351N-ZC
50PT352-ZB
50PT353/353A/353K/353N-ZA
Appliance
Safety :
IEC/EN60065
EMI : EN55013
EMS : EN55020
Market
Albania, Austria, Belgium, Bosnia, Bulgaria, Coratia, Czech, Denmark,
Estonia, Finlan , France, Germany, Greece, Hungary, Irelan , Italy,
Kazakhstan, Latvia, Lithuania, Luxembourg, Morocco, Netherlan s,
Norway, Polan , Portugal, Romania, Russia, Serbia, Slovakia,
Slovenia, Spain, Swe en, Switzerlan , Turkey, Ukraine, UK

- 5 - LGE Internal Use OnlyCopyright ©2011 LG Electronics Inc. All rights reserved.
Only or training and service purposes
VMod l G n ral Sp cification
No Item Speci ication Remarks
1 Market Albania, Austria, Belgium, Bosnia, Bulgaria, Coratia, 36 Country
Czech, Denmark, Estonia, Finland, France, Germany,
Greece, Hungary, Ireland, Italy, Kazakhstan, Latvia,
Lithuania, Luxembourg, Morocco, Netherlands, Norway,
Poland, Portugal, Romania, Russia, Serbia, Slovenia,
Spain, Sweden, Slovakia, Switzerland, Turkey, Ukraine,
UK
2 Broadcasting system 1) PAL/SECAM BG EU (PAL Market)
2) PAL/SECAM DK
3) PAL Ⅰ/Ⅱ
4) SECAM L/L’
5) DVB T
6) DVB C
3 Receiving system Analog : Upper Heterodyne
Digital : COFDM
4 Scart Jack (1EA) PAL, SECAM
5 Video Input (1EA) PAL, SECAM, NTSC Side AV
6 Component Input (1EA) Y/Cb/Cr, Y/ Pb/Pr
7 RGB Input RGB-PC Analog (D-Sub 15Pin)
8 HDMI Input (4EA) HDMI-PC HDMI/DVI,HDMI2, HDMI3
HDMI-DTV
9 Audio Input (3 EA) RGB/DVI Audio, Component, AV L/R Input
10 SPDIF Out(1 EA) SPDIF Out
11 USB(1EA) For SVC, S/W Download, DivX
12 LAN For UK models