Saturday, 30 January 2021

MACKIE DL806 - DL1608 wireless digital mixer-assembly-wiring diagram

 

General Digital
Sample Rate: 48 kHz
A/D/A Bit Depth: 24-bit
System Latency: 1.5 ms

Frequency Response
All inputs to all outputs: ±0, –1 dB, 20 Hz to 20 kHz

Mic input to Main Output (A–weighted)
Channel and main faders at unity: –79 dBu
Faders down: –90 dBu

Dynamic Range (One channel and main fader at unity, A–weighted): 109 dB

CMRR: >70 dB @1 kHz (60 dB gain)

Analog Inputs 1–16

1-12: XLR Balanced

13-16: Combo XLR / TRS Balanced

Supported Devices
iOS Version Requirement: iOS 5.1 or higher [Master Fader] iOS 6 or higher [My Fader]

DL Series mixer with Lightning Connector

Wired:  iPad(4th generation), iPad mini (With iPad mini tray accessory)

Wireless:  All iPad models, iPhone (iPhone 4, iPhone 4S and iPhone5), iPod touch (4th and 5th generation)

DL Series mixer with 30-pin Connector

Wired:  Original iPad, iPad 2, iPad (3rd generation)

Wireless:  All iPad models.

Control Application: Mackie Master Fader App, Mackie My Fader App

External Supply Power Requirements: 100-240 VAC, 50-60 Hz, Universal Supply, Output Voltage:  12 VDC, Current:  4A, DC Connector:  5.5 mm x 2.5 mm barrel with locking ring

Line Cord:  User-replaceable IEC. Power Consumption:  48 W max. Weight: 6.9 lb / 3.1 kg

Service Kits
• 30-PIN CONNECTOR WITH TRAY SERVICE KIT (Includes instructions) PN#2039264
• 30-PIN DOCK SERVICE KIT (Includes instructions) PN#2042301
• LIGHTNING CONNECTOR WITH TRAY SERVICE KIT (Includes instructions) PN#2039276
• LIGHTNING DOCK SERVICE KIT (Includes instructions) PN#2042300
• DL iPAD MINI TRAY KIT (Includes instructions) PN#2042302

Block diagram



Assembly and quick parts


Wiring diagram


Bottom side and top side of the PWB


Below is an annotated picture of DL1608 and DL806 showing how the channels are named in the hardware (since variations between models are by board no-stuffs, and the same physical channels are not labeled the same between models for the user). So the schematics, and connector pin-out documentation, use these labels as appropriate. H/W inputs A5-A8 are combo jacks. All others are regular XLR


Sunday, 24 January 2021

Samsung LCD TV Monitor LT20A350-troubleshooting, factory mode and service mode

 

Samsung LT22A350, LT23A350, LT24A350, LT20A350, LT22A550, LT23A550, LT24A550, LT27A550.  Chassis: WDS2, WDS4

  Always respect voltages. While some may not be dangerous in themselves, they can cause unexpected reactions that are best avoided. Before reaching into a powered TV set, it is best to test the high voltage insulation. It is easy to do, and is a good service precaution.

It makes sense to avoid exposure to electrical shock.  While some sources are expected to have a possible dangerous impact, others of quite high potential are of limited current and are sometimes held in less regard.

Leakage Current Test

With the unit completely reassembled, plug the AC line cord directly into a 120V AC outlet. With the unit’s AC switch first in the ON position and then OFF, measure the current between a known earth ground (metal water pipe, conduit, etc.) and all exposed metal parts, including: metal cabinets, screwheads and control shafts.
The current measured should not exceed 0.5 milliamp.
Reverse the power-plug prongs in the AC outlet and repeat the test.

Troubleshooting

No Power

- The LEDs on the front panel do not work when connecting the power cord.
- The SMPS relay does not work when connecting the power cord.
- The units appears to be dead.

The IP relay or the LEDs on the front panel does not work when connecting the power cord if the cables are
improperly connected or the Main Board or SMPS is not functioning. In this case, check the following:
- Check the internal cable connection status inside the unit.
- Check the fuses of each part.
- Check the output voltage of SMPS.
- Replace the Main Board.

No Video (Analog PC signal)

- Check the PC source
- Check the Arsenal, Check the Main Chipset.
- This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.

No video (HDMI 1, 2, 3, 4 - Digital signal)

Audio is normal but no picture is displayed on the screen.

- Check the HDMI source.
- Check the HDMI switch, Check the Main Chipset.
- This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.

No Video (Tuner_CVBS)

- Audio is normal but no picture is displayed on the screen.

- Check the Tuner CVBS source.
- Check the Tuner, Check the Main Chipset.
- This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.

No Video (Tuner DTV)

- Audio is normal but no picture is displayed on the screen.

- Check the DTV source.
- Check the Tuner, Check the Main Chipset.
- This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.

No Video (Video CVBS)

- Audio is normal but no picture is displayed on the screen.

- Check the Video CVBS source
- Check the Main Chipset.
- This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.

No Video (Component)

- Audio is normal but no picture is displayed on the screen.

- Check the Component source
- Check the Main Chipset.
- This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected

No Sound

- Video is normal but there is no sound..

- When the speaker connectors are disconnected or damaged.
- When the sound processing part of the Main Board is not functioning.
- Speaker defect.

Entering Factory Mode

To enter ‘Service Mode’ Press the remote -control keys in this sequence :
- If you do not have Factory remote – control.

Power Off > Info > Menu > Mute

How to Access Service Mode

Using the Customer Remote
1. Turn the power off and set to stand-by mode.
2. Press the remote buttons in this order; POWER OFF- INFO - MENU - MUTE to turn the set on.
3. The set turns on and enters service mode. This may take approximately 20 seconds.
4. Press the Power button to exit and store data in memory.
- If you fail to enter service mode, repeat steps 1 and 2 above.
5. Initial SERVICE MODE DISPLAY State.

x How to enter the hidden factory mode.
a. into the factory mode
b. move the tap to Advanced
c. key input : 0 + 0 + 0 + 0
xx hidden menu : Advanced

Buttons operations within Service Mode


Saturday, 23 January 2021

Lenoxx MC 261 schematic, exploded view, wiring diagram and Lennox MC242CD SCHEMATIC

 

Do the following safety checks after servicing this unit.

1. Remove all the externally connected test equipment and wires before testing the unit.
2. Use the safety test circuit as shown below.
3. Plug the power cord or unit to be tested into the test receptacle.
4. Switch the unit being tested to ON or PLAY.
5. Connect external jack/terminal contact VTVM across a 1k resistor in the test circuit. Set the meter to a high (150V AC) scale to avoid meter damage and then touch the points with the test probe.  If the meter reading indicates less than 3 volts on all test points, set the meter to a low (3V AC) scale and repeat the test.
6. Any reading greater than 0.2 volt indicates a potential shock hazard. If this occurs, determine the cause of the leakage, correct the problem, and repeat the safety test.

  Always respect voltages. While some may not be dangerous in themselves, they can cause unexpected reactions that are best avoided. Before reaching into a powered TV set, it is best to test the high voltage insulation. It is easy to do, and is a good service precaution.

It makes sense to avoid exposure to electrical shock.  While some sources are expected to have a possible dangerous impact, others of quite high potential are of limited current and are sometimes held in less regard.

Wiring diagram

Schematic diagram

Exploded view
Exploded view
Lenoxx MC-242 CD schematic

Monday, 18 January 2021

BN44 00285A and SS 9002A POWER SUPPLY SCHEMATIC

 

BN44 00285A – H32F1-DY POWER – STR W6252, FAN7530, BD9893F


SS 9002A Power supply schematic

Tuesday, 12 January 2021

How to disassable Samsung HT E5550, HT E5550-EN Blu ray Home theater system, How to update the software

 

How to upgrade the software, How to enter the area code, disassemble procedure, How to initialize, Power amplifier and Power board [SMPS] schematic

Disassemble procedure

Be careful to follow the disassembly sequence described in the manual. Otherwise, the product may be damaged.
• Be sure to carefully read and understand the safety instructions before performing any work as the IC chips on the PCB are vulnerable to static electricity.
• In order to assemble reverse the order of disassembly.

Unfasten 4 screws on the rear side.
: BH,+,B,M3,L10,ZPC(BLK),SWRCH18A

Slide the COVER-TOP back to remove.
Pull and lift up COVER-TOP rear side

[Be careful not to make any scratches as you remove them.]

Disconnect the FPC cable between the COVER-FRONT ASSY and the MAIN PCB



1) Loosen the bottom and side clips and tilt up.
2) Lift the COVER-FRONT at a 45 degree angle upward. then the hooks on the top side can be automatically removed


Disconnect the DECK cable from the MAIN-PCB.
Unfasten the screws of 4 points around the. : BH,+,-,B,M3,L6,ZPC(WHT),SWRCH18A,RF
Remove the DECK from the COVER-BOTTOM.

For WiI-Fi, unfasten 1 connector to MAIN ASSY and 1 screw.
: BH,+,-,B,M3,L6,ZPC(WHT),SWRCH18A,RF


To remove the MAIN+AMP ASSY, PCB unfasten 5 screws on the board and 2 on the rear.
: BH,+,-,B,M3,L6,ZPC(WHT),SWRCH18A,RF
Remove the bridge connection between the main and power, remove the fan cable connection and remove the metal support post in the center.
Remove the MAIN from the case.

Unplug the FAN cable connected to the main board and then remove the main board from the case

Before pull out the SMPS PCB, Unplug the connector

For SMPS, PCB unfasten 4 screws on bottom-side.
: BH,+,-,B,M3,L6,ZPC(WHT),SWRCH18A,RF


Initialization & Upgrade

How to check Firmware version

Method 1
- Step 1: Open the tray.
- Step 2: Press and hold “INFO” button on the remote for 5 seconds.
- Then, you will see below screen.

Method 2 (For only Back End version)
- Select the Settings on the menu.
- Settings→ Support→ Contact Samsung
Description for the meaning
- Front : System micom
- S/W : BACKEND Firmware
- Loader : Loader Firmware
- Region : BD region code / DVD region code
- Macrovision : Macrovision version
- Model : Model name
- Main Touch IC : touch key firmware
- HDMI RX : HDMI Firmware (Only for HT-E5500 series)


How to update firmware

The Software Upgrade menu allows you to upgrade the product’s software for performance improvements or additional services. You can upgrade in four ways:
• By Internet
• By USB
• By Disc
• By Downloaded (File)
The four methods are explained below.

By Internet
To upgrade by Internet, follow these steps:
1) Select By Internet, and then press the ENTER button. The Connecting to Server message appears.
2) If there is a download available, the Download pop-up appears with a progress bar and the download starts.
3) When the download is complete, the Upgrade Query window appears with three choices:
Upgrade Now, Upgrade Later, or Don’t Upgrade.
4) If you select Upgrade Now, the product upgrades the software, turns off, and then turns on automatically.
5) If you do not make a selection in one minute or select Upgrade Later, the product stores the new upgrade software.
You can upgrade the software later using the By Downloaded function.
6) If you select Don’t Upgrade, the product cancels the upgrade.
NOTE: Your product must be connected to the Internet to use the By Internet function.
The upgrade is complete when the product turns off, and then turns on again by itself.
Never turn the product off or back on manually during the update process.

[If you want to cancel the upgrade while the upgrade software is downloading, press the ENTER button]

By USB
To upgrade by USB, follow these steps:
1) Visit www.samsung.com/bluraysupport
2) Download the latest USB software upgrade zip archive to your computer.
3) Unzip the zip archive to your computer. You should have a single folder with the same name as the zip file.
4) Copy the folder to a USB flash drive.
5) Make sure the disc tray is empty, and then insert the USB flash drive into the USB port of the product.
6) In the product’s menu, go to Settings > Support > Software Upgrade.
7) Select By USB.
NOTE: The disc tray must be empty when you upgrade the software using the USB Host jack.
When the software upgrade is done, check the software details in the software Upgrade menu.
Do not turn off the product during the software upgrade. It may cause the product to malfunction.
Software upgrades using the USB Host jack must be performed with a USB memory flash stick only.

By Disc
To upgrade by Disc, follow these steps:
1) Visit www.samsung.com/bluraysupport.
2) Download the latest disc software upgrade zip archive to your computer.
3) Unzip the zip archive to your computer. You should have a single folder with the same name as the zip file.
4) Write the folder onto a disc. We recommend a CD-R or DVD-R.
5) Finalize the disc before you remove it from your computer.
6) Insert the disc into product.
7) In the product’s menu, go to Settings > Support > Software upgrade.
8) Select By Disc.
NOTE: When the system upgrade is done, check the software details in the software Upgrade menu.
Do not turn off the product during the Software Upgrade. It may cause the product malfunction.

By Downloaded
The By Downloaded option lets you upgrade using a file the product downloaded earlier but you decided not to install
immediately or a file downloaded by the product in Standby Mode (See Download in Standby Mode below).
To upgrade By Downloaded, follow these steps:
1) If upgrade software has been downloaded, you will see the software version number to the right of By Downloaded.
2) Select By Downloaded, and then press the ENTER button.
3) The product displays a message asking if you want to upgrade. Select Yes. The product begins the upgrade.
4) When the update is complete, the product turns off automatically, and then turns on.
NOTE: When the system upgrade is done, check the software details in the software Upgrade menu.
Do not turn off the product during the software Upgrade. It may cause the product to malfunction.
To use the By Downloaded function, your product must be connected to the Internet.

Download in Standby Mode
You can set the Download in Standby Mode function so that the product downloads new upgrade software when it is in Standby mode. In Standby mode, the product is off, but its Internet connection is active. This allows the product to download upgrade software automatically, when you are not using it.
To set Download in Standby Mode, follow these steps:
1) Press the ▲▼ buttons to select Download in Standby Mode, and then press the ENTER button.
2) Select On or Off.
Off : If you select Off, the product will notify you with a pop up message when new upgrade software is available.
On : If you select On, the product will automatically download new upgrade software when it is in Standby mode with the power off. If it downloads new upgrade software, the product will ask you if you want to install it when you turn the product on.
NOTE: To use the Download in Standby Mode function, your product must be connected to the Internet.

(Cold Start Method (Initialize Setup)

1)This is useful for forgotten Parental Lock password.
2) Press “■” button on the front panel for over 5 seconds while ‘no disc’ status.
3) Then, VFD sign : “INIT” → Power will be turned off automatically.
4) System Micom Cold Start :
During Stand-By, just press the Stop Button "■” of remote-controller for over 5 seconds. Then, VFD sign : "RESET".II

Inserting the Region Code after replacing the Main PCB

NOTE
• After replacing the Main PCB and System Micom (IC23), the region code should be inserted.
• The unit will not work properly if you do not insert the correct region code.
• You must use the remote control

Select the "AUX" mode and then press the "Tuner Memory" button on the remote control for 4-5 seconds

You should see the “T-MODE” message display on the VFD. Press the “▼” direction button during this message.
NOTE: The “T-MODE” indicator on the VFD only appears for a very short time.

You can see “TEST - -” on the VFD. Insert the number “46” to select the Region Code.


After step (3), you can see “- - -” on the VFD.
Insert the Region Code (see Table on next page) corresponding to the model and area in which you reside in using the “0-9” buttons on the remote control. And then turn off the power.

In order to check if you inputted correctly, please do Number 1, 2, 3 again and then during “TEST - -” MODE insert number 47. After that, you can check the option code which you inserted. For example, you can see “000US5”. It means that you inserted region code “000” and the region is USA which supports 5.1CH Audio output. If it is “047EU2”, it means that you inserted region code “047” and the region is Europe which supports 2.1ch Audio output.

REGION CODES


WIRING DIAGRAM AND PIN VOLTAGES


PIN CONNECTIONS


POWER AMPLIFIER SCHEMATIC


POWER BOARD [SMPS] SCHEMATIC



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.


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

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