Panasonic TC75EX750C – Service mode, adjustments, Power LED blinking codes, hotel mode and more

TC75EX750C –  Panasonic LED LCD TV - Service mode, adjustments, Power LED blinking codes, hotel mode. Universal remote control set-up codes for Panasonic TVs and more - LA73 Chassis  Canada

The information given here is for experienced service technicians only and is not for use by the user. Does not contain warning or cautions to advce non-technical persons of potential dangers in attempting to service this product.  Products powered by electricity should be serviced or repaired by well experienced service personal only.  Any attempt to service or repair the product by anyone else could result in serious injury or even death.
Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any ESD on your body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging ESD wrist strap, which should be removed for potential shock reasons prior to applying power to the unit under test.

Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material to the chassis or circuit assembly into which the device will be installed.

After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly.

A-Board:  Main

P-Board: Power supply

K-Board: REMOTE / LED / CATS

LDP-Board: LED Driver

Replacement of ICs
When Main IC (IC8000) is replaced, eMMC (IC8920) should be also replaced with new one the same time.
When eMMC (IC8920) is replaced, Main IC (IC8000) is not necessary to be replaced the same time.
After the replacement of IC, SELF CHECK should be done to generate the final KEY data.

Keys HDCP1.4 (SINK) for MTK HDMI and HDCP2.2 (SINK) for MTK HDMI are not displayed in SELF CHECK.
Connect the 4K60Hz with HDCP2.2 compatible equipment to HDMI1/2 for verification of key [HDCP2.2 (SINK) for MTK HDMI].
Connect the 4K30Hz compatible equipment to HDMI1/2/3/4 for verification of key [HDCP1.4 (SINK) for MTK HDMI].

How to SELF CHECK 

While pressing [VOLUME ( - )] button on the main unit, press [MENU] button on the remote control for more than 3 seconds.
TV will be forced to the factory shipment setting after this SELF CHECK.

Digital TV programmes can be recorded in USB HDD.
A One-to-One key generated in A-board by SELF CHECK binds TV and USB-HDD for communication.
That key is only one key for them. If the key is difference, TV cannot access USB-HDD

Caution
New key will be generated by following SELF CHECK and previous TV programmes recorded in USB HDD will not be viewed.
SELF CHECK: While pressing [VOLUME ( - )] button on the main unit, press [MENU] button on the remote control for more than 3 seconds.

How to enter into CS Maintenance Menu

After exchange parts, check and adjust the contents of adjustment mode.
While pressing [VOLUME ( - )] button of the main unit, press [ RED ] button of the remote control three times within 2 seconds.
Note:
CS Maintenance Menu can not be entered when 3D signal input.
Input 2D signal to enter CS Maintenance Menu.

Key command
Press the Cursor key [Up/Down] on the remote control to select the functions.

How to exit:
Press the [EXIT] button on the remote control.

Repack
1. Select [OPT] in CS Maintenance Menu.
2. Press [OK] button or Cursor key [Right] on the remote control.

Exit:
Press the [Exit] button or the [Return] button on the remote control.

EDID Clock
1. Select [EDID CLK] in CS Maintenance Menu.
2. Press [OK] button or Cursor key [Right] on the remote control

Exit:
Press the [Exit] button or the [Return] button on the remote control.

USB HDD Drive Check
1. Select [DRV CHECK] in CS Maintenance Menu.
2. Press [OK] button or Cursor key [Right] on the remote control.

Exit:
Press the [Return] button on the remote control.

White Balance Adjustment
After LCD PANEL or A-Board is replaced and repaired, perform [White balance adjustment] in case of necessity for test / check
([White balance adjustment] is not required basically).
1. Select [W/B ADJ] in CS Maintenance Menu.
2. Press [OK] button on the remote control.
Note for performing [White balance adjustment]
Make a note for the setting values before changing if the settings of [R-GAIN], [B-GAIN] and [G-GAIN] in [WB-ADJ] will be changed.
3. Press the cursor key [Up/Down] on the remote control to change the data value, and press [OK] button on the remote control to store the value for this model.
* COLOR TEMP : Press the [Option] button of the remote control to change the color temperature. (COOL/NORMAL/WARM/ TUNING)

Press the [Return] button on the remote control.

Version

1. Display the [Main Menu] with [MENU] on the remote control.
2. Select [Help] with Cursor Key [Up] or [Down] on the remote control and press [OK] to access.
3. Select [Version] with cursor Key [Up] or [Down] on the remote control and press [OK] to access.

The next window will appear.

Hotel mode

In order to display the Hotel mode setup menu, please enter the following command (within 2 seconds).
[TV]: Vol [Down] + [REMOTE]: AV (3 times)

To exit the Hotel mode setup menu
Switch off the power with the [POWER] button on the main unit or the [POWER] button on the remote control.

Data Copy by USB Memory

Board replacement (Copy the data when exchanging A-board):
(a) When exchanging A-board, the data in original A-board can be copied to USB Memory and then copy to new A-board.

(b) Hotel (Copy the data when installing a number of units in hotel or any facility):
When installing a number of units in hotel or any facility, the data in master TV can be copied to USB Memory and then copy to other TVs.

Preparation
Make pwd file as startup file for (a) or (b) in a empty USB Memory.
1. Insert a empty USB Memory to your PC.
2. Right-click a blank area in a USB Memory window, point to New, and then click text document. A new file is created by default (New Text Document.txt).
3. Right-click the new text document that you just created and select rename, and then change the name and extension of the file to the following file name for (a) or (b) and press ENTER.
File name:
(a) For Board replacement : boardreplace.pwd
(b) For Hotel : hotel.pwd
Note:
Make only one file to prevent the operation error.
No any other file should not be in USB Memory.

Data copy from TV set to USB Memory
1. Turn on the TV set.
2. Insert USB Memory with a startup file (pwd file) to USB terminal.
On-screen Display will be appeared according to the startup file automatically.
3. Input a following password for (a) or (b) by using remote control.
(a) For Board replacement : 2770
(b) For Hotel : 4850
Data will be copied from TV set to USB Memory.
It takes around 2 to 6 minutes maximum for copying.
4. After the completion of copying to USB Memory, remove USB Memory from TV set.
5. Turn off the TV set.
Note:
Following new folder will be created in USB Memory for data from TV set.
(a) For Board replacement : user_setup
(b) For Hotel : hotel

Data copy from USB Memory to TV set
1. Turn on the TV set.
2. Insert USB Memory with Data to USB terminal.
On-screen Display will be appeared according to the Data folder automatically.
3. Input a following password for (a) or (b) by using remote control.
(a) For Board replacement : 2771
(b) For Hotel : 4851
Data will be copied from USB Memory to TV set.
4. After the completion of copying to USB Memory, remove USB Memory from TV set.
(a) For Board replacement : Data will be deleted after copying (Limited one copy).
(b) For Hotel : Data will not be deleted and can be used for other TVs.
5. Turn off the TV set.
Note:
1. Depending on the failure of boards, function of Data copy for board replacement does not work.
2. This function can be effective among the same model numbers.

Self-check function

1. Checking the IIC bus lines
2. Power LED Blinking timing

Self-check indication only:

Produce TV reception screen, and while pressing [VOLUME ( - )] button on the main unit, press [BLUE] button on the remote control for more than 3 seconds.

Self-check indication and forced to factory shipment setting

Caution:
New key will be generated and previous TV programmes recorded in USB HDD will not be viewed. (See USB HDD Recording)
Produce TV reception screen, and while pressing [VOLUME ( - )] button on the main unit, press [MENU] button on the remote control for more than 3 seconds.

Exit

Disconnect the AC cord from wall outlet or press the [POWER] button on the main unit for 3 seconds to turn off and then turn on automatically.

Power LED Blinking timing chart

Information of LED Flashing timing chart.
When an abnormality has occurred the unit, the protection circuit operates and reset to the standby mode. At this time, the
defective block can be identified by the number of blinks of the Power LED on the front panel of the unit.

LCD Panel test mode

Purpose:
To find the possible failure point where in LCD Panel or Printed Circuit Board when the abnormal picture is displayed.
How to Enter:
While pressing [VOLUME ( - )] button of the main unit, press [YELLOW] button of the remote control three times within 2 seconds.
How to Exit:
Switch off the power with the [POWER] button on the main unit or the [POWER] button on the remote control.
How to confirm:
If the abnormal picture is displayed, go into LCD Panel test mode to display the several test patterns.
And then, judge by the following method.
Still abnormal picture is displayed: The cause must be in LCD Panel.
Normal picture is displayed: The cause must be in A board.
Remarks:
The test pattern is created by the circuit in LCD Panel.
In LCD Panel test mode, this test pattern is displayed unaffected by signal processing for RF or input signal.
If the normal picture is displayed, LCD Panel must be okay and the cause of failure must be in A board.

Universal remote control set-up codes for Panasonic brand TVs.

0016 0032 0033 0049 0054 0075 0099 0101 0104 0107 0110 0119 0143 0151 0152 0161 0166 0207 0249 0304 0305 0306 0396 0420 0461 0611 0631 0633 0692

If your set need a 3 digit code, just delete the leading Zero from each of the above said code, and then try it.

Hitachi L32A404 TFT LCD TV - how to enter service mode, firmware update, troubleshooting, power board schematic

Hitachi LCD TV SMPS 715G3261P02000003S circuit diagram, service mode, software update, troubleshooting

 Enhanced definition LCD display panel

This specification applies to the 31.5 inch Color TFT-LCD Module T315XW04 V1. This LCD module has a TFT active matrix type liquid crystal panel 1,366 x 768 pixels, and diagonal size of 31.5 inch. This module supports 1,366 x 768 mode. Each pixel is divided into Red, Green and Blue sub-pixels or dots which are arranged in vertical stripes.  Gray scale or the brightness of the sub-pixel color is determined with a 8-bit gray scale signal for each dot. The T315XW04 V1 has been designed to apply the 8-bit 1 channel LVDS interface method. It is intended to support displays where high brightness, wide viewing angle, high color saturation, and high color depth are very important.

1.Replacement work should be started after the Panel Module and the AC/DC Power supply have become sufficiently cool.
2. Special care should be taken when working near the display area in order not to damage its surface.
3. The Panel Module should not be touched with bare hands in order to protect its surface from blemishes and damage.
4. It is recommended that you use clean soft gloves during the replacement work in order to protect not only the display area of the Panel Module but also yourself.

Firmware Upgrade:  Equipments and materials
1. TV remote control
2. AC power 110V/ 60Hz
3. Flash storage.

Use PC to write software to a flash storage, press “on” button to start the TV. (Take L46S603 for example)
1. Insert the flash storage into the USB port, and you will see a picture in which you can choose “YES” or “NO”.   You choose “YES”, and then the software will update automatically.
2. After software update is finished, you put out the flash storage and restart the TV.
3. Press “menu+1999+select”, check whether software version is OK.

No Picture, No Sound
First, confirm the status of Stand-by / On lamp (LED), then:

Status of Stand-by / On lamp (LED) & probable cause

Not lighting:  Confirm the connection of AC cord is complete, and AC switch is turned on, then forward.

Lighting in red:  Power save mode of Video or PC input. It is not defect.

Lighting in red:  Turn power on by remote controller.  If it does not turn power on.

General troubleshooting (Click on the pictures to zoom in)

SMPS 715G3261P02000003S and sub power control schematics

Main and Power PWBs

Audio amplifier section schematic

Adjustment
In the TV mode adjust volume to zero, press menu key and then press number key 1 > 9 > 9 > 9. to achieve the factory mode. Select the item of White Balance and press right key to enter it.

Change TV, press the item “Current Source” to Component mode and change signal to 720p mode, press the item “Auto Color”; 

Change TV, press the item “Current Source” to PC mode and change signal to PC TIMING 137(1024X768) Pattern 147 (16 Grays), press the item “Auto Color”.

[Activating Reset to Default Settings (Reset to Def) will zero both hour counters, the one for back light time and the one for total time.  You may want to add a condition or event in which this would be recommended.]

Grundig 40VLE827S, 40VLE8270, 46VLE8270 TK Chassis – service mode, SMPS schematic

Used ICs: TK10A600[FET], DDA014, DDA006DCQR, ST9S101-T6G, NCP1608BDR2G, MAX9728A, STA339BW[Main amp and Woofer amp], DELTA DPS-214CP SMPS.

Grundig - Chassis TK
40 VLE 827 S - LLS000

40 VLE 8270 BL - KYN000
40 VLE 8270 SL - LHF000
40 VLE 8270 WL - LHD000
46 VLE 8270 BL - KYP000
46 VLE 8270 SL - LHG000
46 VLE 8270 WL - LHE000

Parental Control
The personal pin can be changed with master pin 2356.
Hotel Mode
Maximum volume is limited and Menu "SOURCE SETUP" is no available at activated hotel mode.
Call up: MENU > 8500 > 4 "System Configuration" > 0 (OK) > 43
"Hotel" > 1 2 "On".

Switching off the Hotel Mode temporarily

At this function the activated hotel mode is deactivated until the set is switched off (standby).
Call up: MENU > 4658 > MENU > MENU > 43 "HOTEL TV SETTINGS"> 0 (OK)
Following adjustment are available in the additionally menu HOTEL
TV SETTINGS
* Maximum Volume
* Start-Up Volume
* First Power (Standby / Power On)

DELTA - DPS214CP power board PWB and schematic

Audio amplifier section schematic

Cloning Function

It is possible to copy following data to an external USB stick and back to TV set:
– Channel/Video Set. Programme tables and settings of signal sources - they are transferable into further TV set of same version.
– Service Set. TV adjustments of service and special functions without panel values.
– User Set. User settings.
– ALL In case of service: If the defective chassis board are still operate, it is possible to save all adjustments / settings and copy into new chassis board.

Copy data to USB stick
Connect empty USB memory > MENU > 8500 > ▲/▼ "Cloner Configuration"> 4658 > ▼ "Copy" > ◄/►  TV to USB > ▼ "Copy Item" > ◄/►  Channel/Video Set., Service Set., User Set or ALL >▼ "Start Cloning" > start with ► > "Success" is showing at the end.
Copy data from USB stick into TV set
If necessary switch off Hotel Mode temporarily (see above) > MENU > 8500 > ▲/▼  "Cloner Confguration"> 4658 >▼ "Copy" > ◄/►  USB to TV > ▼ "Copy Item" > ◄/►  Channel/Video Set., Service Set., User Set or ALL > ▼ "Start Cloning" > start with ► "Success" is showing at the end.

Service Mode
 Press button MENU.
 Enter the code number 8500.

Exit the Service Mode
 Press button MENU

Functions of buttons

Menu > call up/Exit the comfort guide/Exit the service mode.

Up/Dn > call up the dialogue line or point of menu

OK > call up menus

< / > changing settings

<<= sub menu: back to main menu

Software Version Number
The software version number is shown on the lower part of the options menu and the service menu. e.g.: TKGRMR.-.-.-.-.V01.000.00

HP Compaq presario G61 Notebook PC – setup utility, backup and recovery, language change

Compaq Presario CQ61 Notebook PC - restore default, system information, system recovery, backup and more .....

Setup Utility

The Setup Utility is a ROM-based information and customization utility that can be used even when your Windows® operating system is not working.

The fingerprint reader (selected models only) cannot be used to access the Setup Utility.

The utility reports information about the computer and provides settings for startup, security, and other preferences.
To start the Setup Utility:

CAUTION: message is displayed in the lower-left corner of the screen, press f10.

or
1. Open the Setup Utility by turning ON, or restarting the computer. 

While the “Press the ESC key for Startup Menu” message is displayed in the lower-left corner of the screen, press esc.

2. When the Startup Menu is displayed, press f10.

Changing the language of the Setup Utility

The following procedure explains how to change the language of the Setup Utility. 

If the Setup Utility is not already running, begin at step 1. If the Setup Utility is already running, begin at step 2.
1. Open the Setup Utility by turning on or restarting the computer. 

While the “Press the ESC key for Startup Menu” message is displayed in the lower-left corner of the screen, press f10.
 or 
1. Open the Setup Utility by turning on or restarting the computer. 

While the “Press the ESC key for Startup Menu” message is displayed in the lower-left corner of the screen, press esc. When the Startup Menu is displayed, press f10.

2. Use the arrow keys to select System Configuration > Language, and then press enter.
3. Use the arrow keys to select a language, and then press enter.
4. When a confirmation prompt with your language selected is displayed, press enter.
5. To save your change and exit the Setup Utility, use the arrow keys to select Exit > Exit Saving Changes, and then press enter.
Your change goes into effect immediately.

Navigating and selecting in the Setup Utility

Because the Setup Utility is not Windows based, it does not support the TouchPad. Navigation and selection are by keystroke.
 To choose a menu or a menu item, use the arrow keys.
 To choose an item in a list or to toggle a field, for example an Enable/Disable field, use either the arrow keys or f5 or f6.
 To select an item, press enter.
 To close a text box or return to the menu display, press esc.
 To display additional navigation and selection information while the Setup Utility is open, press f1.

Displaying system information

The following procedure explains how to display system information in the Setup Utility. If the Setup Utility is not open, begin at step 1. If the Setup Utility is open, begin at step 2.
1. Open the Setup Utility by turning on or restarting the computer. While the “Press the ESC key for Startup Menu” message is displayed in the lower-left corner of the screen, press f10.
 or
Open the Setup Utility by turning on or restarting the computer. 

While the “Press the ESC key for Startup Menu” message is displayed in the lower-left corner of the screen, press esc. When the Startup Menu is displayed, press f10.
2. Select the Main menu. System information such as the system time and date, and identification information about the computer is displayed.
3. To exit the Setup Utility without changing any settings, use the arrow keys to select Exit > Exit Discarding Changes, and then press enter.

Restoring default settings in Setup Utility

The following procedure explains how to restore the Setup Utility default settings. If the Setup Utility is not already running, begin at step 1. If the Setup Utility is already running, begin at step 2.
1. Open the Setup Utility by turning on or restarting the computer. While the “Press the ESC key for Startup Menu” message is displayed in the lower-left corner of the screen, press f10.
 or 
Open the Setup Utility by turning on or restarting the computer. While the “Press the ESC key for Startup Menu” message is displayed in the lower-left corner of the screen, press esc. When the Startup Menu is displayed, press f10.
2. Use the arrow keys to select Exit > Load Setup Defaults, and then press enter.
3. When the Setup Confirmation is displayed, press enter.
4. To save your change and exit the Setup Utility, use the arrow keys to select Exit > Exit Saving Changes, and then press enter.
The Setup Utility default settings go into effect when the computer restarts.

[Your password, security, and language settings are not changed when you restore the factory default settings.]

Exiting Setup Utility

You can exit the Setup Utility with or without saving changes.
 To exit the Setup Utility and save your changes from the current session:
If the Setup Utility menus are not visible, press esc to return to the menu display. 

Then use the arrow keys to select Exit > Exit Saving Changes, and then press enter.
 To exit the Setup Utility without saving your changes from the current session:
If the Setup Utility menus are not visible, press esc to return to the menu display. Then use the arrow keys to select Exit > Exit Discarding Changes, and then press enter.
After either choice, the computer restarts in Windows.

[1 GB = 1 billion bytes when referring to hard drive storage capacity. Actual accessible capacity is less. Actual drive specifications may differ slightly.]

Backup and recovery

Recovery after a system failure is as complete as your most current backup. HP recommends that you create recovery discs immediately after software setup. As you add new software and data files, you should continue to back up your system on a regular basis to maintain a reasonably current backup.
Tools provided by the operating system and HP Recovery Manager software are designed to help you with the following tasks for safeguarding your information and restoring it in case of a system failure:
 Creating a set of recovery discs (Recovery Manager software feature). 

Recovery discs are used to start up (boot) your computer and restore the operating system and software programs to factory settings in case of system failure or instability.
 Backing up your information regularly to protect your important system files.
 Creating system restore points (operating system feature). System restore points allow you to reverse undesirable changes to your computer by restoring the omputer to an earlier state.
 Recovering a program or driver (Recovery Manager software feature). 

This feature helps you reinstall a program or driver without performing a full system recovery.
 Performing a full system recovery (Recovery Manager software feature). 

With Recovery Manager, you can recover your full factory image if you experience system failure or instability. Recovery Manager works from a dedicated recovery partition (select models only) on the hard drive or from recovery discs you create.

[If your computer includes a solid-state drive (SSD), you been included for computers that do not have a partition. Use these discs to recover your operating system and may not have a recovery partition. Recovery discs have software. 

To check for the presence of a recovery partition, select Start > Computer. If the partition is present, an HP Recovery drive is listed in the Hard Disk Drives section of the window]

Creating recovery discs

HP recommends that you create recovery discs to be sure that you can restore your system to its original factory state if you experience serious system failure or instability. Create these discs after setting up the computer for the first time.  Handle these discs carefully and keep them in a safe place. The software allows the creation of only one set of recovery discs.

[If your computer does not include an internal optical (purchased separately) to create recovery discs, or youdrive, you can use an optional external optical drive can purchase recovery discs for your computer from the HP Web site.]

Note the following guidelines before creating recovery discs:
 You will need high-quality DVD-R, double-layer DVD-R, DVD+R, double-layer DVD+R, BD-R (writable Blu-ray), or CD-R discs. All these discs are purchased separately. DVDs and BDs have a much higher capacity than CDs. 

If you use CDs, up to 20 discs may be required, whereas only a few DVDs or BDs are required.

Read-write discs, such as CD-RW, DVD±RW, double-layer DVD±RW, and BD-RE (rewritable Blu-ray) discs, are not compatible with the Recovery Manager software.
 The computer must be connected to AC power during this process.

 Only one set of recovery discs can be created per computer.
 Number each disc before inserting it into the optical drive.
 If necessary, you can exit the program before you have finished creating the recovery discs. The next time you open Recovery Manager, you will be prompted to continue the disc creation process.

To create a set of recovery discs

1. Select Start > All Programs > Recovery Manager > Recovery Manager.
Recovery Manager opens.
2. Click Advanced Options.
[If you are operating the computer on battery power, you will be prompted to connect to AC power before you can go to the next step.]

3. Click Recovery disc creation, and then click Next.
4. Follow the on-screen instructions.

To back up
 On a regularly scheduled basis
[Set reminders to back up your information periodically.]
 Before the computer is repaired or restored
 Before you add or modify hardware or software.

Suggestions
 Create a set of recovery discs using Recovery Manager.
 Create system restore points using the Windows System Restore feature, and periodically copy them to disc.
 Store personal files in the Documents folder and back up this folder periodically.
 Back up templates stored in their associated programs.
 Save customized settings in a window, toolbar, or menu bar by taking a screen shot of your settings. The screen shot can be a time-saver if you have to reset your preferences.
To copy the screen and paste it into a word-processing document, follow these steps:
a. Display the screen.
b. Copy the screen:
To copy only the active window, press alt+fn+prt sc.
To copy the entire screen, press fn+prt sc.
c. Open a word-processing document, and then select Edit > Paste.

Using system restore points

When you back up your system, you are creating a system restore point. A system restore point allows you to save and name a snapshot of your hard drive at a specific point in time. You can then recover back to that point if you want to reverse subsequent changes made to your system.

[Recovering to an earlier restore point does not affect restore point]

You also can create additional restore points to provide increased protection for your system files and settings.

When to create restore points
 Before you add or extensively modify software or hardware
Periodically, whenever the system is performing optimally.

[If you revert to a restore point and then change your mind, you can reverse the restoration.]

Create a system restore point
1. Select Start > Control Panel > System and Maintenance > System.
2. In the left pane, click System Protection.
3. Click the System Protection tab.
4. Under Automatic restore points, select the disk for which you want to create a restore point.
5. Click Create.
The System Protection window opens.
6. Follow the on-screen instructions.

Restore to a previous date and time
To revert to a restore point (created at a previous date and time), when the computer was functioning optimally, follow these steps:
1. Select Start > Control Panel > System and Maintenance > System.
2. In the left pane, click System protection.
3. Click the System Protection tab.
4. Click the System Restore button, and then click Next.
The System Restore window opens.
5. Follow the on-screen instructions.

Performing a recovery

You can recover only files that you have previously to create an entire drive backup as soon as you set up your computer.

Recovery Manager software allows you to repair or restore the system if you experience system failure or instability. Recovery Manager works from recovery discs or from a dedicated recovery partition (select models only) on the hard drive. However, if your computer includes a solid-state drive (SSD), you may not have a recovery partition. If that is the case, recovery discs have been included with your computer. Use these discs to recover your operating system and software.

Windows has its own built-in repair features, such as have not already tried these features, try them before using Recovery Manager. System Restore and driver roll-back capabilities. 

If you have not already tried these features, try them before using Recovery Manager.

Recovery Manager recovers only software that was preinstalled computer must be downloaded from the manufacturer's Web site or reinstalled from the disc provided by the  at the factory. Software not provided with this manufacturer.

Recovering from the recovery discs
To restore the system from the recovery discs:
1. Back up all personal files.
2. Insert the first recovery disc into the optical drive and restart the computer.
3. Follow the on-screen instructions.

Recovering from the dedicated recovery partition (select models only)

If your computer includes an SSD, you may not have a re this procedure. Recovery discs have been included for computers that do not have a recovery partition. You will not be able to recover using partition. Use these discs to recover your operating system and software.

On some models, you can perform a recovery from the partition on the hard drive from either the Start button or f11. This restores the computer to its factory condition.
To restore the system from the partition, follow these steps
1. Access Recovery Manager in either of the following ways:
 Select Start > All Programs > Recovery Manager > Recovery Manager.
  or
1. Restart the computer and press f11 while the “Press <F11> for recovery” message is displayed on the screen. Then select Recovery Manager.
Recovery Manager opens.
2. Click Advanced Options.
3. Click System recovery, and then click Next.
4. Follow the on-screen instructions.

4000Watts RMS – Hi-Power stereo amplifier circuit using LF356N, 2SC5200, 2SA1943

Power 8 ohms – 1500W RMS

Power 4 ohms – 2600W RMS

Power 2 ohms – 4000W RMS

* Tinned fiberglass printed circuit boards to withstand higher currents and increase durability.

* Aluminum front panel and steel chassis.

* Electronic protection circuit against short circuit or output overload.

* Advanced design and internal layout developed for easy circuit maintenance.

* Circuit protection against overheating with thermo mechanical sensor.

** Forced cooling made by two turbo fans (one for each channel) and heat sinks with large dissipation area.

* Automatic DC level control at the amplifier output. (maximum 5mV).

* DC protection circuit at the output, with high current relays.

* Super sized power supply with toroidal transformer.

* Electronically balanced inputs with XLR connectors.

Class AB circuit, suitable for working in any frequency range.

Operates only with 240V network. (RS512 - Bi-Volt).

* Subsonic and ultrasonic frequency filters.

BARGRAFF type VU for easy power monitoring.

Schematic

LG RF-21FB20R, LG RT-21FB20R - 21 inch CRT TV – Service mode, option adjust, circuit diagram

LG RF/RT-21FB20R/RE/RQ/RX/RW, RF/RT-21FB20V/VE/VG/VQ/VW - MC-019A CHASSIS 

 Used ICs: LA7016, TDA9361/81/70, MSP34100, TDA9859, TDA6107Q, STR-F6654R, LA7840 

Adjustments

Test Equipment required
1. Multimeter (volt meter)
2. Oscilloscope
3. 10:1 PROBE
4. Color Analyzer

CDL Data Adjustment(LINE SVC-0)
1) Press the SVC button to get into the SVC-0 Mode.
2) Press the Channel UP/DOWN button to select CDL12.
3) Press the Volume UP/DOWN button until the CDL data is the same as the Table below.

4) Press the OK(i) button to memorize the data.

OPTION Data Adjustment(OPTION-1,OPTION-2)
1) Press OK buttons on both TV set and Remote Controller at the same time to get into SVC mode.
2) Press the Yellow button several times to find OPTION-1 or OPTION-2.
3) Input the correspond OPTION data referring to Table below with the numeric buttons.
4) Press the OK(¡) button to memorize the data.

Screen Voltage Adjustment

1) Connect the probe of oscilloscope to the RK (Red Cathode) of CPT Board.

2) Set the oscilloscope to 50V/div and 20Us/div and after putting GND line upon the lowest grid line of the scope by pressing GND button, enter into DC mode.
3) Tune the TV set to receive a PAL-B/G 05CH.
4) Adjust Screen Volume of FBT so that the waveform is the same as below.

White Balance Adjustment.(LINE SVC-0)

This adjustment should be performed after screen voltage adjustment.
1) Tune the TV set to receive an 100% white pattern.
2) Press OK(¡) buttons on TV set and remote controller at the same time to get into SVC mode.
3) Press Yellow button on remote controller. (Standard mode)
4) Press Channel UP/DOWN button for desirous function adjustment.
5) Adjust VOL+ or VOL-button in each status of "RG--"/"BG--" for
X=272¡ 8, Y=288¡ 8 with color analyzer.

(Europe Model: X=288¡ 8, Y=295¡ X=272¡ 8, 11,000K)

Schematic [Full]

Power and Deflection section

Deflection Adjustment Procedure
VL (Vertical Linearity)
Adjust so that the boundary line between upper and lower half is in accord with geometric horizontal center of the CPT.
VA (Vertical Amplitude)
Adjust so that the circle of a digital circle pattern may be located within the effective screen of the CPT.
SC (Vertical “S” Correction)
Adjust so that all distance between each horizontal lines are to be the same.
VS (Vertical Shift)
Adjust so that the horizontal center line of a digital circle pattern is in accord with geometric horizontal center of the CPT.
HS (Horizontal Shift)
Adjust so that the vertical center line of a digital circle pattern is in accord with geometric vertical center of the CPT.
Press the OK(¡) button to memorize the data.

Convergence Adjustment

This procedure DOES NOT apply to bonded yoke and picture tube assemblies.
Do not use screen magnets during this adjustment procedure. Use of screen magnets will cause an incorrect display.

Philips 46PFL3706-F7 – LCD TV – Power board schematic, service mode, firmware update, Initialization

                    Philips 46" LCD TV

Electrical adjustments are required after replacing circuit components and certain mechanical parts. It is important to perform these adjustments only after all repairs and replacements have been completed.  Also, do not attempt these adjustments unless the proper equipment is available.

Test Equipment Required

1. Remote control unit
2. Color Analyzer,
CA-310 (KONICA MINOLTA Luminance meter) or measuring instrument as good as CA-310.

How to set up the service mode

1. Turn the power on.
2. Press [MENU] button to display Setup menu.
3. Select “Features”.
4. Select “Current Software Info”.
5. Press [0], [6], [2], [5], [9], [6] and [INFO] buttons on the remote control unit in this order. The service mode screen appears.

Purity Check Mode
This mode cycles through full-screen displays of red, green, blue, and white to check for non-active pixels.
1. Enter the service mode.
2. Each time the [7] button on the remote control unit is pressed, the display changes as follows.

3. To cancel or to exit from the Purity Check Mode, press [PREV CH] button.

The White Balance Adjustment should be performed when replacing the LCD Panel or Digital Main CBA.

Symptom of Misadjustment: White becomes bluish or reddish.

1.Operate the unit for more than 60 minutes.
2. Enter the service mode.
3. Press [VOL - ] button three times on the remote control unit to select “Drive setting” mode. “Drive” appears in the screen.
4. Set the color analyzer at the CHROMA mode and zero point calibration. Bring the optical receptor pointing at the center of the LCD-Panel.

Note: The optical receptor must be set perpendicularly to the LCD Panel surface.
5. Press [3] button to select the “HDB” for High Drive Blue adjustment. (“HDB” appears in the screen.)

6. Press [MENU] button. The internal Raster signal appears in the screen. (“Internal (Single)” appears in the upper right of the screen as shown below.)

7. Press [CH + or -] buttons to adjust the color temperature becomes 12000°K (x= 0.272 / y= 0.278 ±0.002).
8. Press [1] button to select the “HDR” for High Drive Red adjustment (“HDR” appears in the screen.) and press [CH + or -] buttons to adjust the color temperature.
9. If necessary, adjust the “HDB” or “HDR” again.
10. Press [6] button to select the “LDB” for Low Drive Blue adjustment (“LDB” appears in the screen.) and press [CH + or -] buttons to adjust the color temperature.

11. Press [4] button to select the “LDR” for Low Drive Red adjustment (“LDR” appears in the screen.) and press [CH + or -] buttons to adjust the color temperature.
12. If necessary, adjust the “LDB” or “LDR” again.
13. Press [VOL -] button to shift to the “Debugging Message” mode.  If there is no message under “[WB]” section, this adjustment completes.
If “Drive settings are NG. Retry.” is displayed, repeat above steps from 5. to 12. Then check “Debugging Message” again. If “Drive settings are NG. Retry.” is displayed, replace the LCD Panel or Digital Main CBA.
14. To cancel or to exit from the White Balance Adjustment, press [PREV CH] button.

SMPS schematic [Circuit diagram] and PWB

Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit.  If Main Fuse (F1601) is blown , check to see that all components in the power supply circuit are not defective before you connect the AC plug to the AC power supply. Otherwise it may cause some components in the power supply circuit to fail.

For continued protection against risk of fire, replace only with same type 4A, 250V fuse.

TO INITIALIZE THE LCD TV

Initialization is to place the set in a new out of box condition. The customer will be prompted to select a language and program channels after the set has been initialized.
To put the program back at the factory-default, initialize the LCD TV using the following procedure.

1. Turn the power on.
2. Enter the service mode.
 [To cancel the service mode, press [Power] button on the remote control unit.]
3. Press [FREEZE] button on the remote control unit to initialize the LCD television.
4. "INITIALIZED" will appear in the upper right of the screen. "INITIALIZED" color will change to green from red when initialization is completed.

FIRMWARE RENEWAL

There are two states (the User Upgrade and the Factory Upgrade) in firmware update.

The identification of User Upgrade and Factory Upgrade are done by the filename.
1. Turn the power off and unplug the AC Cord.
2. Insert the USB storage device to the USB port.

3. Plug the AC cord in the wall outlet and turn the power on.

4. The update will start and the relative screen will appear.

[If the above screen isn’t displayed, repeat from step 1]

5. When the firmware update is completed the finished screen will appear.

“The software upgrade is completed.
Remove USB storage device, turn TV off then on again”

When the Factory Upgrade is used, after restarting TV, shift to initial screen menu in service mode. "INITIALIZED" will appear in the upper right of the screen. "INITIALIZED" color will change to green from red when initializing is completed.