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.
NOTE : Specifications and others are subject to change without notice for improvement
.
1. Application Range
(1) This spec sheet is applied all of PDP TV with PB11K chassis.
2. Specification
Each part is tested as below without special appointment.
(1) Temperature : 25 °C ± 5 °C (77 °F ± 9 °F), CST : 40 °C ± 5 °C
(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
BOM.
(5) The receiver must be operated for about 5 minutes prior to the adjustment.
3. Test Method
(1) Performance : LGE TV test method followed.
(2) Demanded other specification
Safety : CE, IEC specification
Model NameMarket Brand
50PT490B-SA Brazil / chile / Peru / Venezuela / Costarica / Uruguay LG
50PT490B-SD
Model NameMarket Appliance
50PT490B-SABrazil / chile / Peru / Venezuela/ Costarica / Uruguay Safety : IEC / EN60065
50PT490B-SD
This spec. sheet applies to PB11K Chassis applied PDP TV
all models manufactured in TV factory.
2. Specification
(1) Because this is not a hot chassis, it is not necessary to use
an isolation transformer. However, the use of isolation
transformer will help protect test instrument.
(2) Adjustment must be done in the correct order. But it is
flexible when its factory local problem occurs.
(3) The adjustment must be performed in the circumstance of
25 cC ± 5 cC of temperature and 65 % ± 10 % of relative
humidity if there is no specific designation.
(4) The input voltage of the receiver must keep 100 V - 240 V,
50 / 60 Hz.
(5) Before adjustment, execute Heat-Run for 5 minutes.
V After Receive 100% Full white pattern (06CH) then
process Heat-run
(or “8. Test pattern” condition of Ez-Adjust status)
V How to make set white pattern
1) Press Power ON button of Service Remocon
2) Press ADJ button of Service remocon. Select “10.
Test pattern” and, after select “White” using
navigation button, and then you can see 100% Full
White pattern.
* In this status you can maintain Heat-Run useless any
pattern generator
* Notice: if you maintain one picture over 20 minutes
(Especially sharp distinction black with white pattern –
13Ch, or Cross hatch pattern – 09Ch) then it can
appear image stick near black level.
3. Adjustment items
3-1. PCB Assembly adjustment
(1) Adjust 480i Comp1
(2) Adjust 1080p Comp1/RGB
- If it is necessary, it can adjustment at Manufacture Line
- You can see set adjustment status at “9. ADJUST
CHECK” of the “In-start menu”
3-2. Set Assembly Adjustment
(1) EDID (The Extended Display Identification Data )
(2) Color Temperature (White Balance) Adjustment
(3) Make sure RS-232C control
(4) Selection Factory output option
4. PCB Assembly Adjustment
4-1. Using RS-232C
- Adjust 3 items at 3-1 PCB assembly adjustments
“ (3) Adjustment sequence” one after the order.
(1) Adjustment protocol
(2) Necessary items before Adjustment items
O Pattern Generator : (MSPG-925FA)
O Adjust 480i Comp1
O Addjust RGB (MSPG-925FA:model :225 , pattern :65)
– RGB-PC Mode
* If you want more information then see the below Adjustment
method (Factory Adjustment)
(3) Adjustment sequence
O aa 00 00: Enter the ADC Adjustment mode.
O xb 00 40: Change the mode to Component1 (No actions)
O ad 00 10: Adjust 480i Comp
O ad 00 10: Adjust 1080p comp
O xb 00 60: Change to RGB-PC mode(No action)
O ad 00 10: Adjust 1080p RGB
O xb 00 90: Endo of Adjustmennt
Identification Data) / DDC(Display Data
Channel) download
(1) Summary
1) It is established in VESA, for communication between
PC and Monitor without order from user for building user
condition. It helps to make easily use realize “Plug and
Play” function.
2) For EDID data write, we use DDC2B protocol.
5-4. Auto Download
(1) After enter Service Mode by pushing “ADJ” key,
(2) Enter EDID D/L mode.
(3) Enter “START” by pushing “OK” key.
Caution
- Never connect HDMI & D-sub Cable when the user
downloading .
- Use the proper cables below for EDID Writing.
O It only needs to PCM EDID D/L for North America Product.
- North America & South Centural America
(PT350B, PT250B/E, PT260E/PT490/U/R)
RGB EDID table(2D HD)
- North America & South Centural America
(PT350B, PT250B/E, PT260E/PT490/U/R)
* See Working Guide if you want more information about EDID
communication.
5-6. Adjustment Color Temperature
(White balance)
(1) Using Instruments
1) Color Analyzer: CA-210 (CH 9)
- Using LCD color temperature, Color Analyzer (CA-
210) must use CH 9, which Matrix compensated
(White, Red, Green, Blue compensation) with CS-
2100. See the Coordination bellowed one.
2) Auto-adjustment Equipment (It needs when Auto-
adjustment – It is availed communicate with RS-232C :
Baud rate: 115200)
3) Video Signal Generator MSPG-925F 720p, 216Gray
(Model: 217, Pattern 78)
(2) Connection Diagram (Auto Adjustment)
1) Using Inner Pattern
2) Using HDMI input
(3) White Balance Adjustment
- If you can’t adjust with inner pattern, then you can adjust
it using HDMI pattern. You can select option at “Ez-Adjust
Menu – 7. White Balance” there items “NONE, INNER,
HDMI”. It is normally setting at inner basically. If you can’t
adjust using inner pattern you can select HDMI item, and
you can adjust.
- In manual Adjust case, if you press ADJ button of service
remocon, and enter “Ez-Adjust Menu – 7. White Balance”,
then automatically inner pattern operates. (In case of
“Inner” originally “Test-Pattern. On” will be selected in The
“Test-Pattern. On/Off”.
O Connect all cables and equipments like Pic.5)
O Set Baud Rate of RS-232C to 115200. It may set
115200 orignally.
O Connect RS-232C cable to set
O Connect HDMI cable to set
O wb 00 00”: Start Auto-adjustment of white balance.
O “wb 00 10”: Start Gain Adjustment (Inner pattern)
O “jb 00 c0” :
O …
O “wb 00 1f”: End of Adjustment
* If it needs, offset adjustment (wb 00 20-start, wb 00 2f-
end)
O “wb 00 ff”: End of white balance adjustment (inner
pattern disappear)
V Adjustment Mapping information
O When Color temperature (White balance) Adjustment
(Automatically)
- Press “Power only key” of service remocon and
operate automatically adjustment.
- Set BaudRate to 115200.
O You must start “wb 00 00” and finish it “wb 00 ff”.
O If it needs, then adjustment “Offset”.
(4) White Balance Adjustment (Manual adjustment)
1) Test Equipment: CA-210
- Using PDP color temperature, Color Analyzer (CA-
210) must use CH 10, which Matrix compensated
(White, Red, Green, Blue compensation) with CS-
2100. See the Coordination bellowed one.
2) Manual adjustment sequence is like bellowed one.
- Turn to “Ez-Adjust” mode with press ADJ button of
service remocon.
- Select “10.Test Pattern” with CH+/- button and press
enter. Then set will go on Heat-run mode. Over 30
minutes set let on Heat-run mode.
- Let CA-210 to zero calibration and must has gap more
10cm from center of PDP module when adjustment.
- Press “ADJ” button of service remocon and select
“7.White-Balance” in “Ez-Adjust” then press “
G” button
of navigation key. (When press “
G” button then set will
go to full white mode)
- Adjust at three mode (Cool, Medium, Warm)
- If “cool” mode
Let B-Gain to 192 and R, G, B-Cut to 64 and then
control R, G gain adjustment High Light adjustment.
- If “Medium” and “Warm” mode Let R-Gain to 192 and
R, G, B-Cut to 64 and then control G, B gain
adjustment High Light adjustment.
- All of the three mode
Let R-Gain to 192 and R, G, B-Cut to 64 and then
control G, B gain adjustment High Light adjustment.
- With volume button (+/-) you can adjust.
- After all adjustment finished, with Enter (_ key) turn to
Ez-Adjust mode. Then with ADJ button, exit from
adjustment mode
* Attachment: White Balance adjustment coordination and color
- Press In-Start button of Service Remocon then set the “4.Baud
Rate” to 115200. Then check RS-232C control and
7. Selection of Country option.
- Selection of country option is allowed only North American
model (Not allowed Korean model). It is selection of Country
about Rating and Time Zone.
(1) Models: All models which PB82C Chassis (See the first
page.)
(2) Press “In-Start” button of Service Remocon, then enter the
“Option” Menu with “PIP CH-“ Button
(3) Select one of these three (USA, CANADA, MEXICO)
defends on its market using “Vol. +/-“button.
Caution : Don’t push The INSTOP KEY after completing the
function inspection
Caution : Inspection only PAL M / NTSC
8. GND and ESD Testing
8-1. Prepare GND and ESD Testing.
- Check the connection between set and power cord
8-2. Operate GND and ESD auto-test.
(1) Fully connected (Between set and power cord) set enter
the Auto-test sequence.
(2) Connect D-Jack AV jack test equipment.
(3) Turn on Auto-controller(GWS103-4)
(4) Start Auto GND test.
(5) If its result is NG, then notice with buzzer.
(6) If its result is OK, then automatically it turns to ESD Test.
(7) Operate ESD test
(8) If its result is NG, then notice with buzzer.
(9) If its result is OK, then process next steps. Notice it with
Good lamp and STOPER Down.
8-3. Check Items.
(1) Test Voltage
GND: 1.5KV/min at 100mA
Signal: 3KV/min at 100mA
(2) Test time: just 1 second.
(3) Test point
- GND test: Test between Power cord GND and Signal
cable metal GND.
- ESD test: Test between Power cord GND and Live and
neutral.
(4) Leakage current: Set to 0.5mA(rms)
9. POWER PCB Ass’y Voltage
Adjustment
(Va/Vs Voltage Adjustment)
(1)Test equipment : D.M.M 1EA
(2) Connection Diagram for Measuring : refer to fig.1
9-1. Adjustment method
(1) Vs adjustment (refer fig.1)
1) Connect + terminal of D.M.M. to Vs pin of P811, connect
-terminal to GND pin of P811
2) After turning VR901, voltage of D.M.M adjustment as
same as Vs voltage which on label of panel left/top (
deviation ; ±0.5V)
(2) Va adjustment (refer fig.1)
1) After receiving 100% Full White Pattern, HEAT RUN.
2) Connect + terminal of D.M.M. to Va pin of P811, connect
-terminal to GND pin of P811.
3) After turning VR502,voltage of D.M.M adjustment as
same as Va voltage which on label of panel left/top
(deviation; ±0.5V)
10. Default Service option.
10-1. ADC-Set.
V R-Gain adjustment Value (default 128)
V G-Gain adjustment Value (default 128)
V B-Gain adjustment Value (default 128)
V R-Offset adjustment Value (default 128)
V G-Offset adjustment Value (default 128)
V B-Offset adjustment Value (default 128)
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 SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
HDMI
EAX63425902(5)
HDMI
2010.10.21
8 14
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