LG 42PG60-UA (CHASSIS:PU83A) Service Manual ▷ View online
PLASMA TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : PU83A
MODEL : 42PG60
42PG60-UA
CH
VOL
MENU
INPUT
ENTER
- 2 -
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 Replacement Parts List.
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.
Schematic Diagram and Replacement Parts List.
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 lsolation 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.
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 circuitary that may be
inadvertently introduced during the service operation.
damaged by accidental shorts of the circuitary that may be
inadvertently introduced during the service operation.
If any fuse (or Fusible Resistor) in this monitor is blown, replace it
with the same specified type.
with the same specified type.
When replacing a high wattage resistor (Oxide Metal Film Resistor,
over 1W), keep the resistor 10mm away from PCB.
over 1W), keep the resistor 10mm away from PCB.
Keep wires away from high voltage or high temperature parts.
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 positioin, 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 1M
electrical jumper across the two AC plug prongs. Place the AC
switch in the on positioin, 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 1M
Ω
and 5.2M
Ω
.
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.
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 esposed 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 sepcified, there is
possibility of shock hazard and the set must be checked and
repaired before it is returned to the customer.
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 esposed 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 sepcified, 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
CANADA: LG Electronics Canada, Inc. 550 Matheson
Boulevard East Mississauga, Ontario L4Z 4G3
USA : LG Customer Interactive Center
P.O.Box 240007, 201 James Record Road Huntsville,
AL 35824
Digital TV Hotline 1-800-243-0000
AL 35824
Digital TV Hotline 1-800-243-0000
1.5 Kohm/10W
To Instrument's
exposed
METALLIC PARTS
exposed
METALLIC PARTS
Good Earth Ground
such as WATER PIPE,
CONDUIT etc.
such as WATER PIPE,
CONDUIT etc.
AC Volt-meter
IMPORTANT SAFETY NOTICE
0.15uF
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SPECIFICATIONS.................................................................4
ADJUSTMENT INSTRUCTIONS ..........................................5
TROUBLE SHOOTING GUIDE ...........................................11
BLOCK DIAGRAM...............................................................16
EXPLODED VIEW...............................................................23
EXPLODED VIEW PARTS LIST .........................................24
SCHEMATIC DIAGRAM..........................................................
PRINTED CIRCUIT BOARDS .................................................
TABLE OF CONTENTS
- 4 -
■
The specifications shown above may be changed without prior notice for quality improvement.
MODELS
AC100-240V
~
50/60Hz
NTSC-M, ATSC, 64 & 256 QAM
VHF 2-13, UHF 14-69, CATV 1-135, DTV 2-69, CADTV 1-135
75 ohm
32
~
104¡F (0
~
40¡C)
Less than 80 %
-4
~
140¡F (-20
~
60¡C)
Less than 85 %
Dimensions
(Width x Height
x Depth)
W eight
Power requirement
Television Sys
tem
Program Cove
rage
External Antenna Impedance
Env
i
ronment
condition
W ith stand
W ithout stand
W ith stand
W ithout stand
Operating Temperature
Operating Humidity
Storage Temperature
Storage Humidity
42PG25
(42PG60-UA)
50PG25
(50PG60-UA)
41.1 x 28.9 x 12.1 inches
1044.4 x 735.4 x 308.0 mm
41.1 x 26.7 x 3.1 inches
1044.4 x 680.6 x 79.6 mm
61.7 pounds / 28.0 kg
55.1 pounds / 25.0 kg
48.6 x 33.4 x 14.3 inches
1235.6 x 849.3 x 364.1 mm
48.6 x 31.2 x 3.1 inches
1235.6 x 792.8 x 79.6 mm
96.3 pounds / 43.7 kg
87.5 pounds / 39.7 kg
MODELS
50PG60 (50PG60F-UA)
50PG70 (50PG70F-UB)
60PG60 (60PG60F-UA)
60PG70 (60PG70F-UB)
Dimensions
(Width x Height
x Depth)
W eight
W ith stand
W ithout stand
W ith stand
W ithout stand
48.6 x 33.4 x 14.3 inches
1235.6 x 849.3 x 364.1 mm
48.6 x 31.2 x 3.1 inches
1235.6 x 792.8 x 79.6 mm
100.7 pounds / 45.7 kg
91.9 pounds / 41.7 kg
57.3 x 38.8 x 16.3 inches
1455.0 x 985.0 x 414.0 mm
57.3 x 36.4 x 3.3 inches
1455.0 x 924.8 x 84.1 mm
137.5 pounds / 62.4 kg
121.0 pounds / 54.9 kg
SPECIFICATIONS