TOSHIBA 40L1343DG - Service Mode – Firmware Update - Power Supply Circuit Diagram

How to enter Service Mode - Firmware Update - Hotel Mode Adjustments - SMPS Schematic - Toshiba 40L1343DG - Toshiba 40L1347DG - LCD TV
Used ICs in SMPS circuit: CAP002DG – SG6742HR

HOTEL TV MENU - SERVICE MODE ENTRY

To enter hotel menu, please open main menu by pressing MENU (M) button. 

When you code following password "7935", hidden hotel TV menu appears.

Hotel Mode: Setting "Hotel Mode" item 'On' activates hotel mode. In other words user can do only what he/she is allowed to do. Restriction level can be determined by using other items on menu namely Volume Limit, Panel Button, OSD Disable. In hotel mode, users can not reach channel table and install menu so they could not change any program information.

Last Status: Setting "Last Status" item to 'On' enable TV open with the closing status. Otherwise, if "Last Status" item is set 'Off' TV opens with standby status.

Volume Limit: Sets the maximum value the volume can have. "Volume Limit" can take values between 0-63.

Fixed Volume Enable: Enables (Fixed Volume Enable = On) or prohibits (Fixed Volume Enable = Off) the use of fixed volume value which is set by menu item "Fixed Volume Value". If Fixed Volume Enable is ON, volume cannot be set to a value other than the Fixed Volume Value.

Fixed Volume Value: Sets the fixed value the volume can have. If Fixed Volume Limit is ON, volume is set with the value here.

Headphone Direct Volume: Enables to could set via headphone volume dialogue the headphone volume level.  If it is changed to enable then V+/- keys will change HP volume and left/right option will change speaker volume unless there is any open OSD. If it is disabled it will behave as normal.  Volume control and HP volume control are displayed by volume slider menu.

Panel Lock: Enables (Panel Lock = On) or prohibits (Panel Lock = Off) the use of front panel buttons.

OSD Disable: Disables either only INSTALL menu or all menus, both in analogue and digital (IDTV) mode.  All Menus: All menus (MAIN, SOUND, PICTURE, SETTINGS, and INSTALLATION) are invisible.  OSD Disable = Disable Setup Menus: Only SET-UP menus are invisible.

Invisible Setup Menus are: 

Main menu: Installation, Channel list
Settings menu: Language, parental, Sources, Other settings

Start up Position: Specifies the starting channel when TV is switched ON.

Teletext: Enables (Teletext = On) or prohibits (Teletext = Off) the use of teletext (or MHEG if available).

Copy To USB: Copy NVRAM data (service list, preferences, etc.) to USB device. On MB61 and MB60 all NVRAM data is stored in 8x32KB Flash files named as Flash0.bin, Flash1.bin ... Flash7.bin. When Copy to USB is called, those files are copied from TV to USB. Then they can be used for various purposes testing on another TV or testing/debugging on observatory etc.  Note that USB should be plugged before this operation.

Copy From USB: Copy from USB device data to NVRAM. Just the reverse operation done by copy to USB call.  Previously copied NVRAM files (Flashx.bin) are copied into TV. If there is no flash file or some of them are available on USB, the available ones are copied. If no USB is connected, nothing happens.

SMPS CIRCUIT DIAGRAM

FIRMWARE UPDATING PROCEDURE

Analog - Digital SW update via USB
> copy the files to USB device (root).
 Mb95_en.bin
 mboot.bin
 usb_auto_update_T4.txt

> Turn power to OFF by mechanical switch or removing AC plug and plug the USB to TV
> Keep pressing and holding “OK” key from Toshiba remote controller and at the same time turn power to ON by mechanical SW and hold OK pressed until the standby led blinks very rapidly. Blue led blink time is longer than MB6X chassis.

> When the blinks of led is stopped, TV opens automatically.
> Power OFF / ON TV set, and then TV will be ready.

When TV is ON

Software can be upgraded on Software Upgrade Mode.
> To access Software Upgrade Mode, you will need to enter “1505 with your remote controller,
> When main menu is on. On this mode, a simple yes/no screen appears which asks to upgrade the software.
> In the USB Mass storage devices, there should be the binary whose name likes ‘upgrade_mb95.bin’.
> You will see a simple progress menu which shows the status of the upgrade, This will be completed by restarting of the system.

An isolation transformer should be connected in the power line between the receiver and the AC line before any service is performed on the receiver.