LG 50PJ250R-TA / 50PJ251R-TB (CHASSIS:PP01A) Service Manual ▷ View online
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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.
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.
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.
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.
with the specified.
When replacing a high wattage resistor (Oxide Metal Film
Resistor, over 1W), keep the resistor 10mm away from PCB.
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.
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.
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.
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
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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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.
V
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)
(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
(2) Demanded other specification
Safety : CE, IEC specification
EMC : CE, IEC
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
- 6 -
A
Chroma & Brightness (Optical)
(1) (With 38% Filter) 50” T1 module
No
Item
Min
Typ
Max
Unit
Remark
(*) Special Peak Brightness Mode
- 1/ 100 ~ 3/ 100 white window Pattern
60Hz : 426
60Hz : 473
-
cd/ m
2
(typically 1% window size)
50Hz : 369
50Hz : 410
- Picture Mode : Vivid
1
White peak Brightness
- Mode : HDMI
- Resolution : 1920 x 1080 60H
60Hz : 158
60Hz : 173
-
cd/ m
2
(*) Normal Mode
50Hz : 158
50Hz : 173
- 25/ 100 white window pattern
- Picture Mode : Vivid
2
White average brightness
60Hz : 47
60Hz : 54
- Full White Pattern
50Hz : 44
50Hz : 50
cd/ m
2
- Picture Mode : Vivid
3
Brightness uniformity
-10
0
+10
- 85IRE Full White Pattern
- Picture Mode: Vivid
White
X
0.270
0.285
0.300
White 216 level pattern
Y
0.278
0.293
0.308
Red/ Green/ Blue : 255 level pattern
Red
X
0.635
0.640
-
4
Color
Y
0.318
0.330
0.340
coordinate
Green
X
0.242
0.300
0.305
Y
0.595
0.600
-
Blue
X
-
0.150
0.158
Y
-
0.060
0.070
5
Contrast ratio at dark room
100,000: 1
1,000,000 :1
- White : 1/ 100 White Window Pattern
( Peak Mode )
- Black : Full Black
- Picture Mode : Vivid
6
Color coordinate uniformity
-0.01
Average
+0.01
- 85IRE Full White Pattern
- Picture Mode : Vivid
Cool
X
0.261
0.276
0.291
- 85IRE Full White Pattern
Y
0.268
0.283
0.298
- Picture Mode : Vivid
7
Colour
Medium
X
0.270
0.285
0.300
- Warm, Cool : Color Temp. UI 30
Temperature
Y
0.278
0.293
0.308
- Medium : Color Temp. UI 0
Warm
X
0.298
0.313
0.328
Y
0.314
0.329
0.344