LG 42PJ350 User manual

PLASMA TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : PD01A
MODEL : 42PJ350 42PJ350-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 : MFL62881211(1001-REV00)

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Only or training and service purposes
CONTENTS
CONTENTS ............................................................................................................................... 2
SAFETY PRECAUTIONS ...........................................................................................................3
SPECIFICATION.........................................................................................................................4
ADJUSTMENT INSTRUCTION ..................................................................................................7
TROUBLESHOOTING GUIDE .................................................................................................12
BLOCK DIAGRAM ...................................................................................................................23
EXPLODED VIEW ...................................................................................................................24
SVC. SHEET ................................................................................................................................

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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

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Only or training and service purposes
SPECIFICATIONS
NOTE : Speci ications and others are subject to change without notice or improvement .
VApplication Rang
This spec is applied to the PLASMA TV used PD01A Chassis.
V Sp cification
Each part is tested as below without special appointment.
1) Temperature : 25±5°C (77±9°F), CST : 40±5
2) Relative Humidity: 65±10%
3) Power Voltage: Standard Input voltage (100-240V~, 50/60Hz)
* 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 20 minutes prior to the adjustment.
VT st M thod
1) Per ormance : LGE TV test method ollowed.
2) Demanded other speci ication
Sa ety : CE, IEC speci ication
EMC : CE, IEC
VModul Sp cification
(1) 42” HD
Display Screen Device
Aspect Ratio
PDP Module
Operating Environment
Storage Environment
Input Voltage
1
2
3
4
5
6
No Item Speci ication Remark
42 inch Wide Color Display Module
16:9
PDP42 ####,
RGB Closed(Well) Type, Glass Filter(38%)
Pixel Format: 1365 horiz. By 768 ver.
1) Temp. : 0 ~ 40deg
2) Humidity : 20 ~ 80%
3) Temp. : -20 ~ 60deg
4) Humidity : 10 ~ 90%
AC100-240V~, 50/60Hz
PDP
LGE SPEC.
Maker LG

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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, 36 Country
Coratia, 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, QAM
4 Scart Jack (2EA) PAL, SECAM Scart 1 Jack is Full scart and support
RF-OUT(Analoge)
Scart 2 jack is Hal scart and support
MNT-OUT.
5 Video Input (1EA) PAL, SECAM, NTSC Side AV except PJ20, PK20
6 Component Input (1EA) Y/Cb/Cr, Y/ Pb/Pr rear
7 RGB Input RGB-PC Analog (D-Sub 15Pin) except PJ20, PK20
8 HDMI Input (4EA) HDMI-PC HDMI1/DVI, HDMI2, HDMI3
HDMI-DTV 1ea : PJ20
2ea : PK30, PK20, PJ60, PJ50, PJ30
3ea : PK50, PK70
9 Audio Input (3 EA) RGB/DVI Audio, Component, AV L/R Input
10 SPDIF Out(1 EA) SPDIF Out
11 USB For SVC, S/W Download, X-Studio, DivX PJ30 doesn’t support Divx
PK20, PJ20 only or SVC
12 Bluetooth Bluetooth Phone(JPEG, MP3), Only 50/60PK550
Bluetooth Headset(mono, stereo) Pro ile : A2DP, BIP, FTP, GAVDP, HSP, OPP