Service Manuals-schematic- LCD_TV LG

LG 42PX3RVA-ZC Chassis MF-056C

MATRIX: PDP42V706A2 
MAIN: 6871VMMF61A 
CTRL: 6871QCH066E - 6870QCE120A 
Y-SUS: 6871QYH036B 
Z-SUS: 6871QZH041A 
Y-DRVBT: 6871QH085A. 
PSU: [ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذا الرابط]

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Threads FAULTS: 

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LG 42PQ200R-ZA Chassis PP91B

MATRIX: PDP42G20144 
MAIN: EAX60836101 
CTRL: [ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذا الرابط]
Z-SYS: [ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذا الرابط]
Y-SYS: [ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذا الرابط]
Y-BUFFER: [ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذا الرابط]
PSU: [ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذا الرابط]

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LG 42PM3MVC chassis


TAFM-N103P 6700MF0012C CTRL: [ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذا الرابط] LGPCM-04 [ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذا الرابط] (sticker 42V73DN0A 050727) Z-SUS: [ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذا الرابط]Y-SUS:[ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذا الرابط]YDRV _BTM: [ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذا الرابط]YDRV_TOP: [ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذا الرابط]XRLBT LGE PDP: [ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذا الرابط]XRRBT LGE [ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذا الرابط] .... Threads FAULTS: [ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذا الرابط]


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LG 42LG5000 - SMPS Power supply LGP42-08H - EAY4050530 - Power supply schematic diagram - NCP1207 - NCP1396A - SG6961 - LCD Television repair and service - Tips manual

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Category: LCD Television Repair and Service 

Contents of this article 

• NCP1207 AC-DC Converter
  
• NCP1396 Resonant mode controller 
  
• SG6961 PFC Controller 
  
• Power supply schematic diagram 
  

LG 42LG5000 

NCP1207 AC−DC Converter
The NCP1207 is a controller dedicated for driving the current−mode free running quas −resonant Flyback offline converter. This converter is designed for consumer products like notebooks, offline battery chargers, consumer electronics (DVD players, set−top boxes, TVs), etc. The growing interest for EMI pollution reduction, efficiency improvement, and maximum safety has been taken into account while designing the NCP1207. By implementing the NCP1207 one can build a power supply that can meet all those requirements. This can be achieved with help of the following NCP1207 main features:
# Current−Mode Control: Cycle−by−cycle primary current observation is helping to prevent any significant primary overcurrent which would cause transformer’s core saturation and consequent serious power supply failure.
# Critical Mode Quasi−resonant Operation: Prevents the converter operation in Continuous Conduction Mode inany input and output condition. It is provided by the zero crossing detection of the auxiliary winding’s voltage.
# By addition of the reasonable delay the switch turn−on instant can be shifted to the minimum (valley) of drain voltage. This improves EMI noise and efficiency.
# Dynamic Self−Supply: Ensures IC proper operation in applications where the output voltage varies during operation like battery chargers. The DSS also supplies the IC when the overvoltage event is being latched and converter operation is stopped.
# Overvoltage Protection: By sampling the plateau voltage on the auxiliary winding, the NCP1207 enters into latched fault condition whenever the overvoltage is detected. The controller stays fully latched until the VCC decreases below 4.0 V, e.g. when the user unplugs the power supply from the mains outlet and re−plugs it. The OVP threshold can be adjusted externally.
# Over−Load Protection: by continuously monitoring the feedback loop activity, NCP1207 enters hiccup operation as soon as the power supply is overloaded. As soon as overload condition disappears, the NCP resumes operation.
NCP1396A Resonant Mode Controller
The NCP1396 A/B offers everything needed to build a reliable and rugged resonant mode power supply. Its unique architecture includes a 500 kHz Voltage Controlled Oscillator whose control mode brings flexibility when an ORing function is a necessity, e.g. in multiple feedback paths implementations. Thanks to its proprietary high--voltage technology, the controller welcomes a bootstrapped MOSFET driver for half--bridge applications accepting bulk voltages up to 600 V. Protections featuring various reaction times, e.g. immediate shutdown or timer--based event, brown--out, broken opto--coupler detection etc., contribute to a safer converter design, without engendering additional circuitry complexity. An adjustable deadtime also helps lowering the shoot--through current contribution as the switching frequency increases.
Applications
# Flat Panel Display Power Converters 
# High Power AC/DC Adapters for Notebooks 
# Industrial and Medical Power Sources
# Offline Battery Chargers
PIN COFIGURATION
1 CSS - Soft--start Select the soft--start duration
2 Fmax - Frequency clamp A resistor sets the maximum frequency excursion
3 Ctimer - Timer duration Sets the timer duration in presence of a fault
4 Rt - Timing resistor Connecting a resistor to this pin, sets the minimum oscillator frequency reached for VFB = 1 V 
5 BO - Brown--Out Detects low input voltage conditions. When brought above Vlatch, it fully latches off the controller.
6 FB - Feedback Injecting current in this pin increases the oscillation frequency up to Fmax.
7 DT - Dead--time A simple resistor adjusts the dead--time width
8 Fast - Fault Quick fault detection Fast shut--down pin. Upon release, a clean startup
sequence occurs. Can be used for skip cycle purposes
9 Slow - Fault Slow fault detection When asserted, the timer starts to countdown and shuts down the controller at the end of its time duration.
10 GND - Analog ground --
11 Mlower - Low side output Drives the lower side MOSFET
12 VCC -  Supplies the controller The controller accepts up to 20 V
13 -- -- --
14 HB - Half--bridge connection Connects to the half--bridge output
15 Mupper - High side output Drives the higher side MOSFET
16 Vboot - Bootstrap pin The floating VCC supply for the upper stage
SG6961 PFC CONTROLLER  
Description
The SG6961 is an 8-pin boundary mode PFC controller IC intended for controlling PFC pre regulators. The SG6961 provides a controlled on-time to regulate the output DC voltage and achieve natural power factor correction. The maximum on-time of the external switch is programmable to ensure safe operation during AC brownouts. An innovative multi-vector error amplifier is built in to provide rapid transient response and precise output voltage clamping. A built-in circuit disables the controller if the output feedback loop is opened. The startup current is lower than 20|JA and the operating current is under 4.5mA. The supply voltage can be up to 20V, maximizing application flexibility.
PIN CONFIGURATION
1 INV - lnverting Input of the Error Amplifier. INV is connected to the converter output via a resistive divider. This pin is also used for over-voltage clamping and open-loop feedback protection.
2 COMP -  The Output of the Error Amplifier. To create a precise clamping protection, a compensation network between this pin and GND is suggested.
3 MOT -  Maximum On Time. A resistor from MOT to GND is used to determine the maximum on-time of the external power MOSFET. The maximum output power of the converter is a function of the maximum on time.
4 CS -  Current Sense. lnput to the over-current protection comparator. When the sensed voltage across the sense resistor reaches the internal threshold (O.8V), the switch is turned off to activate cycle-by-cycle current limiting.
5 ZCD -  Zero Current Detection. This pin is connected to an auxiliary winding via a resistor to detect the zero crossing of the switch current. When the zero crossing is detected, a new switching cycle is started. If it is connected to GND, the device is disabled. 
6 GND -  Ground. The power ground and signal ground. Placing a O.1pF decoupling capacitor between VCC and GND is recommended.
7 GD -  Driver Output. Totem-pole driver output to drive the external power MOSFET. The clamped gate output voltage is 16.5V. 
8 VCC - Power Supply. Driver and control circuit supply voltage.
POWER SUPPLY SCHEMATIC DIGRAM 
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LG 32CL10 Service adjustments - LCD Television Repair

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Category: LCD Television Repair  

Contents of this article 

• Service Adjustments
  
• White balance Adjustment 
  
• Replacing parts  
  

LG 32CL10 

Application range
This specification is applied to the LCD TV used LA92A chassis.
Requirement for Test
Each part is tested as below without special appointment.
1) Temperature : 25±5ºC (77±9ºF), CST : 40±5ºC
2) Relative Humidity : 65±10%
3) Power Voltage : Standard input voltage(100~240V@50/60Hz)
* Standard Voltage of each products 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.
Max Luminance &Contrast measure standard specification
- Max Luminance measure specification
1) In non-impressed condition, measure peak brightness displayable as much as possible LCD module.
2) Measuring instrument: CA-210 or a sort of Color Analyzer.
3) Pattern Generator :VG- 828 or a sort of digital pattern generator (displayable Full White &1/25 White Window pattern)
4) Measure condition
# Test pattern: in center,1/5(H)*1/5(V) of Window Pattern (white pattern in non-impressed condition)
# SET condition: Contrast &Brightness Level 100%
# Environment condition : Dark room in the non outside light
# Video menu option condition
5) Measurement
# Do heat-run LCD module at 30minutes in normal temperature (25°C)by using full white pattern of 15%signal level(38 gray level).
# Impress test pattern signal in 1/5(H)*1/5(V)White Window of 100%(255Gray Level)
# measure 3 times brightness of central white window,and mark peak brightness in max brightness degree
# measure the same condition in video signal /RGB signal.
- Luminance uniformity measure specification
1) Impress 100%(255Gray Level) full white pattern at the same peak brightness measurement.
2) Measure average brightness in 5 points.
Contrast ratio measure specification
1) Test display signal :30*30 dots White Window signal &all Black Raster signal
2) Dark room measure condition: Using touch type Color analyzer CA-210 Dark room in the non outside light
3) Bright room measure condition: In bright room of 150Lx illumination in the panel surface, locate a source of light on the above
45º of the panel surface.
4) Measure method
3 In standard test condition,impress 30*30 dots White Window Pattern signal .
Measure center peak brightness degree Lw of white window
# Impress black Raster signal as contrast ratio measurement signal.
Measure black brightness degree Lb of PDP central
Calculate the following numerical formula.
Contrast ratio =Lw /Lb
If it does not use Prior measurement, use generally simple test measurement. The Correct measure specification is followed
by IEC61988-2/CD,JAPAN EIAJ-2710
ADJUSTMENT
Notes
(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 equipment.
(2) Adjustments must be done in the correct order.
(3) The adjustments must be performed in the circumstance of 20±5°C of temperature and 65±10% of relative humidity if there is no specific designation.
(4) The input voltage of the receiver be must kept 100V-240V, 50/60Hz when adjusting.
(5) The receiver must be operated for about 5 minutes prior to the adjustment when module is in the circumstance of over 15.
In case of keeping module is in the circumstance of 0°C, it should be placed in the circumstance of above 15°C for 2 hours
In case of keeping module is in the circumstance of below - 20°C, it should be placed in the circumstance of above 15°C for 3 hours,.
Caution : When still image is displayed for a period of 20 minutes or longer (especially where W/B scale is strong. Digital pattern 13ch and/or Cross hatch pattern 09ch), there can some afterimage in the black level area.
Main PCB check process
- Adjust 480i Comp1
- Adjust 1024*768 RGB
Above adjustment items can be also performed in Final Assembly if needed. Both Board-level and Final assembly adjustment items can be check using In-Star Menu 1.ADJUST CHECK.
ADC Adjustment
(1) Overview
ADC adjustment is needed to find the optimum black level and gain in Analog-to-Digital device and to compensate RGB deviation.
(2) Equipment & Condition
1) Jig (RS-232C protocol)
2) MSPG-925 Series Pattern Generator(MSPG-925FA)
- Resolution : 480i Comp1 (MSPG-925FA: model-209, pattern-65)
1024*768 RGB (MSPG-925FA: model-60 , pattern-65)
- Pattern : Horizontal 100% Color Bar Pattern
- Pattern level : 0.7±0.1 Vp-p
- Image
ADC(Saturn5) Adjustment
(1) Overview
ADC adjustment is needed to find the optimum black level and gain in Analog-to-Digital device and to compensate RGB deviation.
(2) Equipment & Condition
1) Adjust Remocon
2) 801GF(802B, 802F, 802R) or MSPG925FA Pattern Generator
- Resolution: 480i, 1024*768
- Pattern : Horizontal 100% Color Bar Pattern
- Pattern level: 0.7±0.1 Vp-p
- Image
Adjust method
# ADC 480i Comp1
1) Check connected condition of Comp1 cable to the equipment
2) Give a 480i Mode, Horizontal 100% Color Bar Pattern to Comp1.
(MSPG-925FA Ë Model: 209, Pattern: 65)
3) Change input mode as Component1 and picture mode as “Standard”
4) Press the In-start Key on the ADJ remote after at least 1 min of signal reception. Then, select 7. External ADC -> 1. COMP 480i on the menu. Press enter key. The adjustment will start automatically.
5) If ADC calibration is successful, “ADC RGB Success” is displayed. If ADC calibration is failure, “ADC RGB Fail” is displayed.
6) If ADC calibration is failure, after recheck ADC pattern or condition retry calibration. Error message refer to (v)
# ADC 1024*768 RGB
1) Check connected condition of Component & RGB cable to the equipment
2) Give a 1024*768 Mode, 100% Horizontal Color Bar Pattern to RGB port. (MSPG-925 Series Ë model:60 , pattern:65 )
3) Change input mode as RGB and picture mode as “Standard”
4) Press the In-start Key on the ADJ remote after at least
1 min of signal reception. Then, select 7. External ADC -> 1. COMP 480i on the menu. Press enter key. The adjustment will start automatically.
5) If ADC calibration is successful, “ADC RGB Success” is displayed. If ADC calibration is failure, “ADC RGB Fail” is displayed.
6) If ADC calibration is failure, after recheck ADC pattern or condition retry calibration
EDID(The Extended Display Identification Data)/DDC(Display Data Channel) download
Reference : Download is only possible in POWER ONLY MODE
(1) Overview
It is a VESA regulation. A PC or a MNT will display an optimal resolution through information sharing without any necessity of user input. It is a realization of “Plug and Play”.
(2) Equipment
- Since embedded EDID data is used, EDID download JIG, HDMI cable and D-sub cable are not need.
- Adjust remocon
(3)Download method
1) Press Adj. key on the Adj. R/C,
2) Select EDID D/L menu.
3) By pressing Enter key, EDID download will begin
4) If Download is successful, OK is display, but If
Download is failure, NG is displayed.
5) If Download is failure, Re-try download.
Caution) When EDID download, must remove RGB/HDMI cable.
White Balance Adjustment
(1) Overview
# W/B adj. Objective & How-it-works
- Objective: To reduce each Panel’s W/B deviation
- How-it-works: When R/G/B gain in the OSD is at 192, it means the panel is at its Full Dynamic Range. In order to prevent saturation of Full Dynamic range and data, one of R/G/B is fixed at 192, and the other two is lowered to find the desired value.
- Adj. condition : normal temperature
1) Surrounding Temperature: 25±5ºC
2) Warm-up time: About 5 Min
3) Surrounding Humidity: 20% ~ 80%
(2) Equipment
1) Color Analyzer: CA-210 (NCG: CH 9 / WCG: CH12)
2) Adj. Computer(During auto adj., RS-232C protocol is needed)
3) Adjust Remocon
4) Video Signal Generator MSPG-925F 720p/216-Gray (Model:217, Pattern:78)
-> Only when internal pattern is not available
# Color Analyzer Matrix should be calibrated using CS-1000
Adj. method
# Auto adj. method
1) Set TV in adj. mode using POWER ON key
2) Zero calibrate probe then place it on the center of the Display
3) Connect Cable(RS-232C)
4) Select mode in adj. Program and begin adj.
5) When adj. is complete (OK Sing), check adj. status pre mode (Warm, Medium, Cool)
6) Remove probe and RS-232C cable to complete adj.
* W/B Adj. must begin as start command “wb 00 00”, and finish as end command “wb 00 ff”, and Adj. offset if need
# Manual adj. method
1) Set TV in Adj. mode using POWER ON
2) Zero Calibrate the probe of Color Analyzer, then place it on the center of LCD module within 10cm of the surface..
3) Press ADJ key -> EZ adjust using adj. R/C > 6. WhiteBalance then press the cursor to the right (KEYG).
(When KEY(G) is pressed 216 Gray internal pattern will be displayed)
4) One of R Gain / G Gain / B Gain should be fixed at 192, and the rest will be lowered to meet the desired value.
5) Adj. is performed in COOL, MEDIUM, WARM 3 modes of color temperature.
- If internal pattern is not available, use RF input. In EZ
Adj. menu 6.White Balance, you can select one of 2 Test-pattern: ON, OFF. Default is inner(ON). By selecting OFF, you can adjust using RF signal in 216 Gray pattern.
Adj. condition and cautionary items
1) Lighting condition in surrounding area Surrounding lighting should be lower 10 lux. Try to isolate adj. area into dark surrounding.
2) Probe location
- LCD: Color Analyzer (CA-210) probe should be within 10cm and perpendicular of the module surface (80°~ 100°)
3) Aging time
- After Aging Start, Keep the Power ON status during 5 Minutes.
- In case of LCD, Back-light on should be checked using no signal or Full-white pattern.
(6) Reference (White Balance Adj. coordinate and color temperature)
# Luminance: 216 Gray
# Standard color coordinate and temperature using CS- 1000 (over 26 inch)
USB S/W Download (option)
(1) Put the USB Stick to the USB socket
(2) Automatically detecting update file in USB Stick
- If your downloaded program version in USB Stick is Low, it didn’t work.
But your downloaded version is High, USB data is automatically detecting
(3) Show the message “Copying files from memory”
(4) Updating is staring.
5) Updating Completed, The TV will restart automatically
(6) If your TV is turned on, check your updated version and
Tool option. (explain the Tool option, next stage)
* If downloading version is more high than your TV have, TV can lost all channel data. In this case, you have to channel recover. if all channel data is cleared, you didn’t have a DTV/ATV test on production line.
* After downloading, have to adjust TOOL OPTION again.
1) Push "IN-START" key in service remote controller.
2) Select "Tool Option 1" and Push “OK” button.
3) Punch in the number. (Each model has their number.)
IC Remove/Replacement
Some chassis circuit boards have slotted holes (oblong) through which the IC leads are inserted and then bent flat against the circuit foil. When holes are the slotted type, the following technique should be used to remove and replace the IC. When working with boards using the familiar round hole, use the standard technique as outlined in paragraphs 5 and 6 above.
Removal
1. Desolder and straighten each IC lead in one operation by gently prying up on the lead with the soldering iron tip as the solder melts.
2. Draw away the melted solder with an anti-static suction-type solder removal device (or with solder braid) before removing the IC.
Replacement
1. Carefully insert the replacement IC in the circuit board.
2. Carefully bend each IC lead against the circuit foil pad and solder it.
3. Clean the soldered areas with a small wire-bristle brush. (It is not necessary to reapply acrylic coating to the areas).
"Small-Signal" Discrete Transistor Removal/Replacement
1. Remove the defective transistor by clipping its leads as close as possible to the component body.
2. Bend into a "U" shape the end of each of three leads remaining on the circuit board.
3. Bend into a "U" shape the replacement transistor leads.
4. Connect the replacement transistor leads to the corresponding leads extending from the circuit board and crimp the "U" with long nose pliers to insure metal to metal contact then solder each connection.
Power Output, Transistor Device Removal/Replacement
1. Heat and remove all solder from around the transistor leads.
2. Remove the heat sink mounting screw (if so equipped).
3. Carefully remove the transistor from the heat sink of the circuit board.
4. Insert new transistor in the circuit board.
5. Solder each transistor lead, and clip off excess lead.
6. Replace heat sink.
Diode Removal/Replacement
1. Remove defective diode by clipping its leads as close as possible to diode body.
2. Bend the two remaining leads perpendicular y to the circuit board.
3. Observing diode polarity, wrap each lead of the new diode around the corresponding lead on the circuit board.
4. Securely crimp each connection and solder it.
5. Inspect (on the circuit board copper side) the solder joints of the two "original" leads. If they are not shiny, reheat them and if necessary, apply additional solder.
Fuse and Conventional Resistor Removal/Replacement
1. Clip each fuse or resistor lead at top of the circuit board hollow stake.
2. Securely crimp the leads of replacement component around notch at stake top.
3. Solder the connections.
CAUTION: Maintain original spacing between the replaced component and adjacent components and the circuit board to prevent excessive component temperatures.
Circuit Board Foil Repair
Excessive heat applied to the copper foil of any printed circuit board will weaken the adhesive that bonds the foil to the circuit board causing the foil to separate from or "lift-off" the board. The following guidelines and procedures should be followed whenever this condition is encountered.
At IC Connections
To repair a defective copper pattern at IC connections use the following procedure to install a jumper wire on the copper pattern side of the circuit board. (Use this technique only on IC connections).
1. Carefully remove the damaged copper pattern with a sharp knife. (Remove only as much copper as absolutely necessary).
2. carefully scratch away the solder resist and acrylic coating (if used) from the end of the remaining copper pattern.
3. Bend a small "U" in one end of a small gauge jumper wire and carefully crimp it around the IC pin. Solder the IC connection.
4. Route the jumper wire along the path of the out-away copper pattern and let it overlap the previously scraped end of the good copper pattern. Solder the overlapped area and clip off any excess jumper wire.
At Other Connections
Use the following technique to repair the defective copper pattern at connections other than IC Pins. This technique involves the installation of a jumper wire on the component side of the circuit board.
1. Remove the defective copper pattern with a sharp knife. Remove at least 1/4 inch of copper, to ensure that a hazardous condition will not exist if the jumper wire opens.
2. Trace along the copper pattern from both sides of the pattern break and locate the nearest component that is directly connected to the affected copper pattern.
3. Connect insulated 20-gauge jumper wire from the lead of the nearest component on one side of the pattern break to the lead of the nearest component on the other side. Carefully crimp and solder the connections.
CAUTION: Be sure the insulated jumper wire is dressed so the it does not touch components or sharp edges.

How to setup Chromecast

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Contents of this article 

• How to setup Chromecast 
  

Chromecast 

Follow the steps to configure the Chromecast 
Step 1:
Insert the Chromecast into the television set into one of  HDMI ports
Step 2:
Attach the USB connector cable to the Chromecast and attach
other end to a power source; either a USB power adaptor connected to a
wall outlet (Highly recommended) or television set.
Step 3:
Change your TV input to whichever port you plugged your  Chromecast into.
Step 4:
Turn on the device you wish to cast your Chromecast onto.
# For IOS/Android devices go into the app store/ Google play  store and download the “Chromecast” app or go to  “google.com/Chromecast/setup”.
# For Mac/PC open up your chrome browser (Note must use  a chrome browser no other browser currently supports  this) and go to “google.com/Chromecast/setup”.
# Side Note: Your Chrome browser also needs to be up  to date with the latest version for the device to work.
# To update go to settings then click the “Help” on the  left hand side this should take show you which  version you are using and how to update. You can  also type “chrome://help” in the address bar and this  will take you to the same page.
Step 5:
Turn on your Chromecast and screen that displays “set me  up” at the top should appear with a default Chromecast name such as  “Chromecast2372” at the bottom.
Step 6:
 From the “google.com/Chromecast/setup” page or app/Google  play store download the Chromecast software onto your  IOS/Android/Mac/PC. Once downloaded open program/app to begin  using your Chromecast.
Step 7:
Select your Chromecast; it should be something like  “Chormecast1345”.
# For mobile devices go to your devices Wi-Fi setting and select  your Chromecast device. You should be prompted to do this once  you click “Set up a New Chromecast”.
# On your Mac/PC it should automatically scan for Chromecast  devices so all you have to do is click continue once you see your  Chromecast.
Step 8:
You should be prompted to change your TV input until you  see a screen with your code. Once you do click “that’s my code” to  continue.
Step 9:
Next you are prompted to create your device name and log  into your wireless network. Once you’ve done that click continue.
# Its important that your Chromecast and your device are on the  same network
# If you’re trying to connect from Rutgers you will need to talk to a  network administrator to connect to RUWireless/LAWN. If you’re doing this at home it should work fine.
Step 10:
Your Chromecast should now be set up with a message on  your TV saying “reading to cast” now on your device open up an app  that supports Chromecast or simply open your chrome browser and  click cast symbol
Chrome cast Update (casting entire screen or new tab)
# Ensure the Google chrome browser you are using is fully updated and then visit Google for chrome  extension for chrome cast:
After the extension has installed successfully, click the Google cast  icon in the top right hand corner of you chrome browser.
Next click the drop down arrow located on the chrome cast  extension menu.
Click ‘Cast entire screen (experimental)’ or ‘Cast current tab’ in  the drop down menu.
Then click the chrome cast device you would like to use to cast  your entire screen or cast the tab you are on. (e.g.  HSChromecast6910)
Your entire screen or current tab should now be showing on the  display device the Google chrome cast is plugged into.

LG 47LE8500 POWER SUPPLY AND LED INVERTER TEST

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POWER SUPPLY AND LED INVERTER TEST 

POWER SUPPLY SECTION
This switch mode power supply develops Stand By 3.5V at all times when AC is applied. At power on, it develops 12V and 24V for the Main board And 24V for the Inverters
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This power supply draws less than 1 watt during stand by mode. The fuse F501 reads 159.6V
(from hot ground) during this time. (F101 is <3V) When the controller chip receives the PWR-ON command 3.3V via P201 Pin 1, the primary section increases its current supplying ability. Both Primary fuses F101 and F501 now read a little more than 390V.
P201 Connector: (To Main Board)
12V is routed out P201 pins 17, 19 and 21 and
24V is routed out P201 pins 2, 3 and 4.
P204 Connector: (To Inverter Main Board)
24V is routed out P204 pins 1 through 5.
P205 Connector: (To Inverter Secondary Board)
24V is routed out P205 pins 1 through 5.
Power Supply Board Low Voltage Test 1
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AC Should not be applied at any time while adding jumpers or While unplugging connectors as damage to the circuit Board may occur.
a) When AC is applied, the SMPS “MUST” be producing STBY 3.5V on pins 9, 10, 11 or 12 of P201.
If 3.5V Standby is not being generated, the SMPS is defective and must be replaced. There is no need to continue with the next test. But, make sure AC is arriving at the connector SK101.
(b) Unplug P8000 on the Main Board to make insertion of the Jumpers easier. Use P700 Side to insert resistors
TEST 1:
No Backlights during this test

(1) Add a jumper between (3.5V STBY) pin 7, 8, 9 or 10 and Pin 1 (PWR_ON). Apply AC.
This will turn on the power supply, relays will click.
a) Check that the 24V and 12V power supplies are turned on,
# P201 (12V pins 17, 19 and 21)
# P201 (24V pins 2, 3 and 4)
# P204 and P205 (24V pins 1 through 5) to the Inverters
Power Supply Board Backlights Test 2
Continue if the 1st test was OK. Leave original jumper in place.
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(3) Add another jumper between (STBY_3.5V) pin 9, 10, 11 or 12 and Pin 18 (INV_On).
(4) Apply AC Power. Simulating a Power and Backlight On command.
Backlights Normal:
a) If normal, the backlights should turn on. SMPS OK, Inverter OK.
Backlights Abnormal:
a) Recheck all connections.
b) Confirm the INV On/Off line pulling up to at least 3V and arriving at both Inverters.
c) Check the connections to the Inverters.
If the 24V and the Inverter On command is arriving at the Inverters in, check Inverter Section.
Note: Either Inverter can run separately.
Power Supply Connector P201 Voltage Check

Pin	Label	STBY	Run
24	ERROR	0V	0V
23	n/c	n/c	0V
22	n/c	n/c	0V
21	12V	0V	11.9V
20	(1) P-DIM	0V	0.37V~3.3V
19	12V	0.42V	11.9V
18	INV-ON	0V	2.92V
17	12V	0V	11.9V
16	n/c	n/c	n/c
13-15	Gnd	Gnd	Gnd
9-12	3.5V	3.45V	3.44V
5-8	GND	GND	GND
2-4	24V	0V	24.6V
1	PWR-ON	0V	3.3V

(1) PDIM Pin 20 can vary according to incoming video IRE level, OSD Backlight setting and then Intelligent Sensor (room light condition) Output from the Video Processor IC900. Range 0.37V to 3.3V.
INVERTER (LED BACKLIGHTS) SECTION
The Inverter (Main) receives 24V from the SMPS on CN1 pins 1>5 and Inverter (Secondary) receives 24V on CN101 pins 1>5. The Inverter On (INV ON) command arriving on CN1 or CN101 pin 12 starts the Inverter drive signals, (120Hz).
P-DIM is delivered from the Main board through the SMPS to the Inverter on CN1 or CN101 pin 11.
The Inverters are responsible for delivering B+ approx. 13V to each of the 216 LED Blocks. This is accomplished by 3 DC to DC Converters, 2 on Inverter (Main) and 1 on Inverter (Secondary) Inverter (Main) 13V
# U101, Q4, Q5, L101 and C75, out CN2 and CN3.
# U102, Q7, Q8, L102 and C89, out CN4 and CN5.
Inverter (Secondary) 13V
# U101, Q105, Q106, L206 and C151, out CN104 and CN105
The Inverters must also deliver grounding pulses (Drive Signals) to each of the 216 LED Blocks.
This is accomplished by the 15 switching components, 10 on Inverter (Main) U3>U11 and U13 and 5 on Inverter (Secondary) U2>U5 and U13
Inverter (Main) has 4 Connectors CN2 > CN5 that connect to Extensions boards. The Left hand Extension board (as viewed from the rear) connects to CN2 and CN3 and the Center Extension board connects to CN4 and CN5.
Inverter (Secondary) has 2 Connectors CN104>CN105 that connect to the right hand Extension board (as viewed from the rear) which connects to CN23 and CN24. Each Extension board has 9 connections to the Backlight LEDs. There are 4 LEDs per/block, 216 Blocks, 8 Blocks per/cartridge, 3 Cartridges per/bar, 9 bars (rows), 32 LEDs per/cartridge, 96 LEDs per/bar. With a total of 864 LEDs
IOP Structure
4 LEDs per/block (216 Blocks) 8 Blocks per/cartridge, 9 bars with 3 cartridges per/bar,
32 LEDs per/cartridge, 96 LEDs per/bar. 864 LEDs total.


The Individual LEDs can be checked using the Diode Mode forward bias test. The LED will light.
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47LE8500 IOP Block Structure 
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Explode View of the IOP Panel LG
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1. Case-Top Ass’y
2. TFT Panel Ass’y
3. Guide Panel
4. Sheet DBEFD
5. Sheet Prism U
6. Sheet Prism L
7. Sheet Diffuser L
8. Plate Diffuser
9. Cartridge Ass’y
10. Cover Bottom
11. Driver Boards (2)
12. Extension Boards (3)
13. FRC

 Circuit Board Layout
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Inverter LED Driver Information

The Inverters deliver grounding pulses (Drive Signals) to each of the 216 LED Blocks. This accomplishes Global Dimming and Local Dimming. Each output is labeled Vxx. Grounding each block is accomplished by the 15 switching components, 10 on Inverter (Main) U3~U11 and U13 and 5 on Inverter (Secondary) U2~U5 and U13. Inverter (Main) has 4 Connectors CN2~CN5 that connect to Extensions boards. The Left hand Extension board (rear view)connects to CN2 and CN3 and the Center Extension board connects to CN4 and CN5.
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