Saturday, 9 January 2021

LG 42LP1D firmware update, cablecard troubleshooting

 

LG DU-42LZ30, LG 42LP1D, LG 42LB1DR, LG DU-37LZ30, LG 37LC2D, Zenith Z32LZ5R, LG RU-32LZ50C, 32LP1D, 32LX1D-2D

1366 x 768p Resolution
1200:1 Contrast Ratio
NTSC/ATSC/QAM w/CableCARDTM
HDMI with HDCP
RGB (VGA) & RS-232
Memory Card Slot
XD EngineT

LCD VERSUS CRT
One disadvantage LCDs have is having fixed pixels which makes it more difficult to scale video than a CRT. A CRT can change the pixel size by adjusting the size of the beam, LCDs use a processor called a Scalar. LCDs feature their best picture quality at their native resolution (or max res) and CRTs feature good quality at any resolution up to their maximum resolution.

Most LCD TVs feature similar features and specifications. They support High Definition and computer input, except for the 10”, 13”, 20”, and the wireless 15” models. The 2005 models 26" and larger have built-in ATSC tuners and support CableCARDTM. Note that Commerical models don't have CableCARDTM support since it is not needed in a distribution network.

The exception to the model rules are the ZLD models and a couple of special  commercial models. The ZLD models are  original/oldest LCD TVs and there are two 15" models and one 20" model that use this nomenclature.

FIRMWARE UPDATES VIA MEMORY CARD
Firmware can be updated using a memory card on newer LCD TVs that feature a memory card reader.  When a memory card is inserted, the TV will look for any firmware updates located on the card. If it doesn’t find an update newer than the version on the TV, it displays the normal media menu for displaying photos or playing music from the card.

CHECK HARDWARE VERSION
Before updating the firmware, check the hardware version to be sure it will support the firmware you wish to install. To open the diagnostics screen, highlight the Cable icon in the user menu and then press the zero “0” button three times. The hardware version determines which firmware will work with that TV. If the hardware version is below 3.00, 3.13 is newest firmware that will work. For version 3.00, up to the 3.15 firmware will work. Version 3.01 does not currently need a firmware update since 3.16 is it’s original firmware.

FIRMWARE 3.18 SPECIAL REQUIREMENTS
For some models, firmware release 3.18 has different versions for different model revisions. Check the suffix of the TV and use the list below to determine which update to use. You will find the suffix on the back of the TV next to “Product Code”. You can use either method to install the firmware, just make sure you use the correct file. A memory card received from LG will have the files for all three suffixes on it, use the Expert Method to choose the correct firmware to install.

slusllm - 3.18.3
spusllm - 3.18.4
spusltm - 3.18.5

UPDATE INSTUCTIONS - NORMAL METHOD
1) Copy the Firmware update to the memory card. This has already been done for you if the card came from LG Customer Service. The firmware file will have the file extension “.epk”. Only copy the firmware update for your model TV.
2) Turn the TV on and insert the memory card into the TV. If the firmware on the card is newer than the firmware in the TV, the following will be shown:

3) Press ENTER on the remote to begin the firmware update. The TV will restart automatically and show the progress of the update. Do not remove the memory card or remove power from the TV until complete.

4) The TV will show the following messages when the firmware update is complete:

5) Press ENTER. After restarting, the TV is ready to use.

UPDATE INSTUCTIONS - EXPERT METHOD
Expert Mode will allow any firmware version on the card to loaded into the TV. This allows an older version of the firmware to be loaded when needed.
1) Copy the Firmware update to the memory card. The firmware file will have the file extension “.epk”. Only copy the firmware update for your model TV.
2) Turn the TV on and insert the memory card into the TV.
3) If a menu displays on the screen, exit out of that screen. Press the MENU button and highlight (scroll down to) the Option menu. Press the MARK button 7 times and the expert mode screen will appear.

4) Use the arrow keys to select the firmware update to install. Press OK and follow the prompts.
5) When the update is complete, press ENTER to restart the TV. After restarting, the TV is ready to use.

CABLECARD TROUBLESHOOTING

This Menu is only active on Cablecard ready units.

Accessing Host Diagnostics:

1. Press Menu on the customer’s remote.
2. Press the up or down arrow key to highlight CABLE.
3. Press the 0 key three times. Scroll up and down this menu by using the up and down arrow keys.

The model info gives the factory model information also used to access the debug menu for software updates. Memory shows the available memory in the unit for video and audio processing and Cablecard functions. Host release is the present software revision in the unit. Gemstar Guide Version gives the original version of Gemstar in the unit when installed. Guide Update Version is the latest version of Gemstar loaded into the unit by Gemstar. Cable Channel List gives the status of the list of available channels in memory, with a Cablecard installed this should always display Ready. Cablecard indicates if the cablecard is inserted. If the Cablecard is inserted and the unit does not indicate that it is. There could be an issue with the Cablecard itself or with the programing in the card. Once this has been eliminated as the cause. The card slot or Digital PCB could be the cause.

FAT Status tells the frequency of the presently tuned channel as well as the modulation QAM 256/64, digital, analog. Carrier locked indicates the carrier is locked on the center frequency. SNR gives the (Signal to Noise Ratio) of the present signal tuned. FDC is your (Forward Data Carrier) this gives the state of the OOB signal thru which the Cablecard receives data from the headend. It indicates the center frequency that the card told the unit to look at to find the signal. Carrier indicates the unit has the carrier locked or not locked. This must be locked for the Cablecard to operate. FDC-SNR gives the (Signal to Noise Ratio) for this OOB signal. Current Channel shows the channel type Digital or Analog as well as the Parental Control setting for this channel and the channel number.

This indicates the state of the IEE1394 and DVI ports and connection settings.

The meter below shows we are looking for 104.20Mhz. What we find is the signal is shifted slightly.  This indicates the signal is not centered on 104.20Mhz. The OOB tuner is told to look for the data on 104.20Mhz but the data is actually on 104.25Mhz. This is enough shift to prevent the card from receiving the data it needs from the headend. This signal is not allowed this much variation.

TV GUIDE

TV Guide is a free service and is provided by Gemstar. TV Guide can be received OTA (Over The Air) thru an antenna. It can also be received thru cable service. OTA and thru the cable there must be a strong signal on the local ABC and PBS channels for TGOS to operate properly. An antenna can be purchased to retrieve signals as far as 150 miles away and some even further. This is only a good idea for customers far away from any city. The reason is if the customer receives several ABC’s and PBS broadcasts the unit will receive program data from more than one area, thus there will be a lot of incorrect program listings and errors.

1-Video Window - Displays TV video while The TV Guide On Screen system is displayed.
2-Service Bar - Provides access to the 5 main Guide Services.
3-Current Service Label - Indented to indicate current Service displayed.
4-Tile - Displays show title.
5-Highlight - Indicates an active tile.
6-INFO Box - Provides information for a highlighted item.

7-INFO Button - Indicates you can cycles through the various Info Box sizes.
8-Channel Logo - Identifies network.
9-Record/Remind Icons - Indicates a show is set to Record or set as a Reminder.
10-Panel Ad - Location where show- or product-specific information appears (and also where Panel Menu appears).

If the customer has a unit with TVGOS and requires a cable box due to PPV (Pay Per View) or VOD (Video On Demand) and they desire to use TVGOS they will have to split the cable from the wall. One leg of the splitter will have to go to the cable box and the other will have to go to the TV. Auto programming or EZ Scan will have to be run to load PBS and ABC channels into the unit. Any other connection can be used from the cable box to the TV. If the TV cannot see ABC and PBS broadcasts with it’s own tuners, TVGOS will not be downloaded to the unit. The cable box, if connected via coax cable, will only allow the TV to be tuned to channel 3 or 4.

[If the unit has been setup as if it has a cable box in TV Guide, the channel map and G-Link are also setup in TV Guide. The channel map will only see channels 3 or 4 and these are the only channels the unit will tune. If the cable box is removed, setup in TV Guide will have to be reconfigured without a cable box. This will allow the unit to tune channels other than just 3 or 4. Also, the channel map in the unit will show all channels it is authorized to see.]

SYSTEM INFO

To access this menu from the TVGuide screen highlight SETUP at the top of the TVGOS screen press the down key once to highlight CHANGE SYSTEM SETTINGS and press 753159852. The screen above will appear. In Box (A) you can see the original version of Gemstar software the unit had when it was built. Box (B) you can see the version the unit has been updated to. To the right of box B, this will display the version when the unit receives an update again from Gemstar. Box (C) is the coding Gemstar uses for the programming area the unit has been programed for. Not all zip codes have the same or different cable provider and OTA (Over The Air) programming. As a result several zip codes can have the same code and programming. Box (D) tells what input the TV was programmed to look for the TVGOS signals and that the customer set it up as cable signal as the type of signal being supplied to the TV. If the only signal supplied is OTA, this would say ANTENNA. Box (E) saying (recordable host) is letting you know the unit has the ability to record programs without the need or use of any other device. This unit has an HDD (Hard Disk Drive). If the unit was setup for a VCR to be used as the recording device then, this would display VCR. This will assist you in quickly determining if the customer has made an error in setting the unit up correctly.



Access this screen by using the up or down key and scroll Section Reception Slicing. This screen shows Type A, B, and C. Type A is not used in these units. You are only concerned with type B and C. Type B comes in on the vertical sync of you local ABC broadcast. Type C comes in on the vertical sync of your local PBS broadcast. The numerical values indicate the data sections the unit has received. If the value by type B or C is 0, this indicates either the channel reception is poor or there is a problem with the Gemstar equipment at that station. This equipment is not the responsibility of the station to maintain. Gemstar is responsible for their equipment. B CCorr indicates type B and C data corrections that have occured. Band CErrs indicates the errors in the data that has been received. CBad indicates the the bad data that has been confirmed only for type C.

CABLECARD TROUBLESHOOTING

IN-HOME TROUBLESHOOTING

It is recommended that installers bring along a couple of CableCARDs for troubleshooting, This will help eliminate the CableCARD as a possible problem during the installation.
2. Before installing the CableCARD, installers should check that the Digital Cable Ready (DCR), also referred to as a HOST, is functional without a CableCARD.
a. Verify Host (TV) Operation: The installer can perform this by connecting the RF cable to the correct cable input of the DCR (there may be connections for a terrestrial antenna) and verifying good picture quality. The DCR will display all non~encrypted analog and digital content. (The DCR must not receive RF signal via an STB or accessory RF modulator.) This will eliminate basic TV circuitry as a possible problem.

b. Check that the CableCARD is inserted properly. When inserting cable card push carefully but firmly until you feel the card click into place. 

c. Verify RF from Cable System Tap: The installer can also connect a cable set top box to confirm reception of encrypted digital services. This will help eliminate the RF signal as a possible problem,

3. If the first CableCARD installed does not result in a User Interface screen (also referred to as MMI screen) within 5 ~ 7 minutes, try unplugging the AC Power cord of the DCR and reconnecting it (to reset the DCR) then try to await coming out of the User Interface screen again. If this is
still unsuccessful, try another CableCARD.
a. To eliminate the possibility of a damaged CableCARD or DCR device, the technician should look closely at the CableCARD device to ensure that none of the pinholes are blocked or clogged.
b. Check Host Interface. Using a flashlight, the technician should check the CableCARD slot on the DCR TV to ensure that there are no bent pins.
4. If the second CableCARD is successful, make sure the CSR or Dispatcher knows the new MAC ID and CableCARD ID to complete the installation. The original card should be marked accordingly and returned for repair.
5. Check the CableCARD menu options. If the second CableCARD fails to bring up the User Interface screen, the technician should refer to the diagnostic menus on the DCR for further troubleshooting.  The technician can pull up the User Interface screen manually through the menu choices. The customer should provide the User Manual, so the technician can easily navigate through the DCR TV menu screens. The table on the next page describes how to navigate the CableCARD menu. The list of selectable CableCARD options will vary, depending on your cable service provider or CableCARD manufacturer. The table also shows how to access diagnostic screens for the DCR TV. Many of these screens are not described in the User Manual.
6. If the second CableCARD is successful, make sure the CSR or Dispatcher knows the new MAC ID and CableCARD ID to complete the installation. The original card should be marked accordingly and returned for repair.

7. Check the CableCARD menu options. If the second CableCARD fails to bring up the User Interface screen, the technician should refer to the diagnostic menus on the DCR for further troubleshooting.  The technician can pull up the User Interface screen manually through the menu choices. The customer should provide the User Manual, so the technician can easily navigate through the DCR TV menu screens. The table below describes how to navigate the CableCARD menu. the list of selectable CableCARD options will vary, depending on your cable service provider or CableCARD manufacturer. The table below shows how to access diagnostic screens for the DCR TV. Many of these screens are not described in the User Manual.

FIG-9

8. If the installer is still having a problem, the installer should report the problem to the MSO headend dispatcher for troubleshooting. If the cable company dispatcher (headend personnel) has completely checked their channel set-up, confirmed the accounting/billing system to setup is correct, and has confirmed normal channel map with one or more other DCR TVs at the MSO headend, then go on to the next step,
9. If the installer determines that the DCR device is the problem (unit failed either item 2a or 3b above) and can go no further in correcting the problem, and if the installer determines that the host-pod pairing screen cannot be displayed with multiple CableCARDs, he or she should follow the directions given by the CE manufacturer in informing the customer of their options, The customer should start by contacting the CE manufacturer directly for assistance and/or repair information. In many cases, if the HOST is under warranty, the repair will be done at the customer’s home when possible.

9. If using an STB will allow the customer to receive services on the damaged DCR device, the installer can leave a box in the customer’s home until the customer resolves the issue with the CE manufacturer.
10. If the technician is able to install the CableCARD device and access the User Interface screen (also referred to as MMI screen), and has relayed the information to the dispatcher, but is still not receiving encrypted programming, this programming may be protected through the use of copy protection directive. Ensure that the information passed to dispatch is correct. Relay again the Host ID, CableCARD ID and Data ID (Motorola only). Dispatch will send a hit to the CableCARD once the information is checked and verified. The CableCARD must be paired to the Host before copy protected programming can be displayed. Note that it may take several minutes from the time dispatch sends the authorization before it reaches the DCR device. The MMI screens should be checked to verify if the authorization has been received. For SA systems the host-pod pairing screen should say “Authorization Received.” For Motorola the Conditional Access MMl State parameter should say “Subscribed”. (These should be verified by POD Manufacturers or cable companies.)

11. To confirm the Headend Validation for displaying the encrypted channel, the technician should check the CableCARD menu. For SA systems, the CableCARD Copy Protection Infom1ation menu should say “Authorization Received”. For Motorola systems, the Conditional Access menu should say “Valid xx (2 digit).
12. If encrypted programming is still not displayed, installer should check the status of followings.
a. Cable Channel List: Ready
b. CableCard: Inserted
c. FDC status (OOB Status):Lock
d. SNR(Signal to Noise Ratio): higher than 12 dB is normal range, The table below describes how to check status in the LG DCR TV.


Friday, 8 January 2021

SAMSUNG BN44 00214A SMPS and 3000VA Power Inverter Schematic – 12 volt to 230 volt

 

BN44 00214A Samsung LCD TV power board: Used with: LCD TV MK32P5B, LA32A350C1, LE32A457C1D, LE32A456C2D, LE26A457C1D, LE26A456C2D and many other models

Used ICs: TDA4863G, STR A6159, PC802S [Opto-coupler], ,MC33067




3000VA Power Inverter Schematic – 12 volt to 230 volt




Monday, 4 January 2021

How to disassemble LG WD-1247 BD washing machine-Exploded view

 

TEST OPERATION



WIRING DIAGRAM


Disassemble procedure

Unscrew 2 screws on the back of the top plate.
Pull the top plate backward and upward as shown.

Pull out the drawer and unscrew 2 screws.
Lift the side the Control Panel Assembly and pull it out

Push out PANEL ASSEMBLY,CONTROL after Push the hook below

Unscrew the 10 screws from the Control Panel Assembly.
Disassemble the Display PWB Assembly.


Disconnect connector from the wiring.

Two screws are unscrewed.

Push the hook of between BASE,CABINET and PWB ASSEMBLY below as shown.
Pull the PWB assembly (Main) to arrow direction.


Inlet valve removal

Disassemble the top plate assembly.
Pull out the drawer.
Push out the DISPENSER ASSEMBLY after unscrew 2 screws.

Unscrew the nut at the lower part of the dispenser.

Disassemble the 3 or 4 connectors from the valves.

Red Housing(BK/WH-YL/BK)
NA Housing(WH/BL-BK)
Blue Housing(GY/WH-BK)
Red Housing(BL/RD-BK)

Unscrew 2 or 4 screws from the back of the cabinet.

Unscrew 2 or 4 screws from the back of the cabinet.


Cabinet cover removal

Unscrew the 2 screws from the lower of the DECO PANEL.

Unscrew the 4 screws from the back of the DECO PANEL

Pull out the DECO PANEL

Unscrew the 4 screws from upper of the cabinet cover.
Unscrew the screw from filter cover.

Put a flat ( - ) screwdriver or putty knife into the both sides of the filter cover, and pull it out.

Unscrew the screw from the lower side of the cabinet cover.


Open the door.
Disassemble the clamp assembly.

Tilt the cabinet cover.
Disconnect the door switch connector.

NOTE: When assembling the CABINET COVER, connect the connector.

Lift and separate the cabinet cover.

Disassemble the clamp assembly.
Disassemble the Gasket.


Open the door.
Remove the two screws from the Hinge.
When removing the Door Assembly, it is necessary to hold the break is inner of the cabinet cover.

[Be careful: The door is heavy.]

Open the door and disassemble the CLAMP ASSEMBLY.
Unscrew the 2 screws.

NOTE: Reconnect the connector after replacing the DOOR SWITCH ASSEMBLY.


Disassemble the cabinet cover

Separate the pump hose, the bellows and the circulation hose assembly from the pump assembly.
Disassemble the pump assembly in arrow direction.

Separate the pump hose, the bellows and the circulation hose assembly from the pump assembly.
Disassemble the pump assembly in arrow direction.

CAUTION
• When assembling the heater, insert the heater into the heater clip on the bottom of the tub and check the position of wire color.
• Tighten the fastening nut so the heater is secure.

Disassemble the cabinet cover.
Unplug the white connector from the thermistor.
Pull it out by holding the bracket of the thermistor.


When foreign object is stuck between drum and tub

Disassemble the cabinet cover.
Separate the heater from the tub.
Remove any foreign objects (wire, coin, etc.) by inserting a long bar in the opening.

Disassemble the back cover.
Remove the bolt.
Pull out the Rotor.

Unscrew the 2 screws from the tub bracket.
Remove the 6 bolts on the stator.
Unplug the 2 connectors from the stator.

Disassemble the damper hinges from the tub and base.
Separate the dampers.

NOTE:  Once removed, replace the damper with new one.


To check out the fault diagnosis of TSG, in case of removing the water inside, you can pull out the plug and let the water drain away.

Be cautious in case of the TSG is hot temperature.

Remove the housing coupled the TSG (Heater, Water level frequency-sensor, Thermistor)

Taking out the screw of the TSG and Body Frame.


Taking out the screws of Body Frame (2EA)

Separate the hoses from the TSG.

Remove the Body Frame and then, separate the TSG from the washer.


Exploded view





Sunday, 3 January 2021

LG WD-1247 BD WASHING MACHINE-Error codes, troubleshooting, fault diagnosis, wiring and program chart

 

CHILD LOCK

Use this option to prevent unwanted use of the washer. Press and hold the Wash and Rinse button for 3 seconds to lock/unlock control.

When Child lock is set, CHILD LOCK lights and all buttons are disabled except the Power button. You can lock the washer while it is operating.

Test operation

SERVICE CHECKING

Be careful of electric shock or disconnecting the parts while trouble shooting.

Voltage of each terminal is 220-240V~ and DC while applying an electric current.

TEST MODE

Pressing Rinse, and Spin button simultaneously.

Press the Power button, while the above condition.

Press the Start/Pause button as follows.


HOW TO KNOW THE WATER LEVEL FREQUENCY and HOW TO KNOW TO TEMPERATURE OF EACH THERMISTOR AT OPERATING CONDITION.

Temperature of each thermistor at operating condition

Thermistor in tub : Press the [Temp.] button.

 Thermistor in dry duct : Press the [Turbo Steam] button.

WIRING DIAGRAM and PROGRAM CHART

ERROR DISPLAY

If you press the Start/Pause button in error condition, any error except “PE” will disappear and the machine will change into pause status.

In case of  [PE, TE, dHE] if the error is not resolved within 20 sec., and in case of other errors, if the error is not resolved within 4 min., power will be turned off automatically and the error only will be blinked. But in case of  , [FE] power will not be turned off.

FAULT DIAGNOSIS AND TROUBLE SHOOTING

Be careful of electric shock or disconnecting the parts while trouble shooting.

First of all, check the connection of each part terminal with wiring diagram.

If you replace the MAIN PWB ASSEMBLY, Put in the connectors correctly.








LG 52LG50FD, 52LG50FD-SA-Service adjustments-service mode entry-white balance adjustment-ADC component 1 RGB adjustment and more

  These adjustments are similar to 42LB7DF Because this is not a hot chassis, it is not necessary to use an isolation transformer. However...