Sharp LC 19LE510E LED LCD TV – used Vestel 17MB60 LCD TV board, hotel mode, service mode, troubleshoot, SMPS Audio output circuit diagram

This TV board is used with many brand LCD TVs, one among the best proved TV kit – used with Sharp LC-19LE510E/K, Sharp LC-22LE510E/K, Sharp LC-24LE510E/K, Service menu, Software update, Hotel mode, SMPS and Audio output circuit diagram

SERVICE MENU SETTINGS
In order to reach service menu, First Press “MENU” Then press the remote control code two times, which is “4725”.
SOFTWARE UPDATE

Analog - Digital SW update via USB

Copy the files to USB (root).

* mb60_en.bin

* mboot.bin

* USB_auto_update.txt

2. Turn power to OFF by mechanical switch(rocker switch) or removing AC plug. And plug the USB to TV

3. Keep pressing OK key from remote controller and then turn the TV power to ON(by mechanical switch or by inserting the AC plug) and keep OK key pressed until the stanby led blinks rapidly(rapid blinking is faster than normal blinking)

4. When the led is started to blink rapidly, you can release the OK key. Wait approximately for 1-2 minutes.

5. When the blinks of led is stopped, TV opens automatically with the new SW.

HOTEL TV MODE

DTG D-book 6.2 (HD MHEG5 compliant)

MHEG5 v1.06 compliant

MPEG2 MP@ML support (main profile main level)

MPEG4 HP@HL support (high profile high level) (MPEG4 models only)

H264 AVC SD-HD support (MPEG4 models only)

Multi language audio support

Multi language subtitle support

Audio Description

Hotel TV mode

HOTEL TV FEATURES
The HOTEL TV is a special mode which restricts some operations of TV. This allows the customer to use the TV
in hotels or in Hospitals. The restrictions of a hotel TV are basically given below.
1. The user cannot increase the volume above a specified limit. And could set fixed volume.
2. The user could enable headphone direct volume control.
3. The user cannot reach some menus.
4. The user cannot use panel.
5. Start up source position can be limited for the user.
6. Last status could be used or not
7. Teletext could be disabled or enabled.
8. NVRAM data (like service list and user preferences, etc.) could be copied or set via USB device
9. Pin8 could be used or not.

HOTEL TV MENU

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.

Panel Lock

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

RCU Inhibit

If OFF is selected TV will go on normal operation. If it is ON RCU will not function in any menu (including no menu) except this menu. To turn this option OFF later, “hotel TV menu shortcut” (MENU(M)-7-9-3-5) can be used to pop up this menu.

Startup Position

Specifies the starting channel when TV is switched ON. May take one of following values:

AUTO (Last channel when TV is turned off)

(TV channel number 1)

Other enabled external sources via service menu or config tool (EXT1, HDMI2, PC, FAV, SVHS etc.)

Startup Channel

Specifies the starting TV channel‟s ID which will be tuned when startup position is TV

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 dialog 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.
OSD Disable

Disables either only INSTALL menu or all menus, both in analog and digital (IDTV) mode.

OSD Disable = Disable All Menus : All menus (MAIN, SOUND, PICTURE, SETTINGS, and

INSTALLATION) are invisible.

OSD Disable = Disable Setup Menus : Only SETUP menus are invisible.

Invisible Setup Menus are
Main menu: Installation, Channel list
Settings menu: Language, parental, Sources, Other settings
Teletext
Enables (Teletext = On) or prohibits (Teletext = Off) the use of teletext (or MHEG if available)
Copy To USB
There are two steps and both are independent of each other.
Copy the updated welcome image to USB as “hotel_wel.png”
Copy NVRAM data (service list, preferences, etc.) to USB device. 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

There are two steps and both are independent of each other.

If there is file named “hotel_wel.png” in directory “welcome_image”. It is copied to TV to use as welcome image.

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.

USB Option

If ON is selected TV will go on normal operation. If it is OFF USB device will not receive on none of the USB ports.

Fixed Pic. Mode

If OFF is selected TV will go on normal operation. If it is ON Main menu/Picture quick menu/mode and quick menu/picture zoom will be inaccessible.

Digital Tuner

If ON is selected TV will go on normal operation. If it is OFF TV will display “no signal” message when tuned to digital channels existing in active channel list, and digital channels will not be detected in auto or manual searches.

Multiple RC Support

If OFF is selected TV will go on normal operation. If it is ON RCU type (system code) that is chosen in “RCU program menu” will be used. “RCU program menu” can be opened by RETURN-1-2-3-4 shortcut.

Welcome message
As default behaviour a welcome message image will be displayed (if hotel mode is enabled). The image will stay on screen until user presses a key.
On the bottom side of image there is a message (OSD message) displaying “press any key”
Welcome image can be changed through USB (described in “copy from USB” section). A default welcome image is available. Welcome images are .PNG files with the resolution of 960X540.
Signal Lost (no signal) message
As default behavior, if there is no signal the same welcome image is displayed. This time OSD message is “no
signal”.
Internal Clock
If hotel mode is active a new function (add wake up timer) will be available in Settings/Timers menu. That function will open a new menu to set wake up time. After timer is saved, TV can wake up automatically on desired time.
If alarm option was selected as “on” after wake up TV will show welcome image and an alarm will be heard then any key will stop alarm and welcome image.
If alarm option was selected as “off” after wake up TV will not show welcome image and the alarm will not be activated.

There is a “wake-up time channel” option in hotel mode menu, It is used to set the channel, whose time information to be used for wake-up timer. If this option is “0” time information of the channel which is being watched when timer menu is opened, will be used. Otherwise a “please wait” message will be displayed before the menu is open and during “please wait” time information of the channel will be get. (This can take up to 30s). The “wake-up time channel” should be a digital service.
Pin8
If ON is selected Pin8 will go on normal operation. If It is OFF Pin8 ignored.

Audio output schematic, LED Converter & SMPS,   Click on the pictures to magnify

TROUBLESHOOTING

No Backlight Problem

Problem: If TV is working, led is normal and there is no picture and backlight on the panel.

Possible causes: Backlight pin, dimming pin, backlight supply, stby on/off pin

Backlight pin should be high in open position. If it is low, please check Q181 and panel cables.

Dimming pin should be high or square wave in open position. If it is low, please check S16 for Mstar side and panel or power cables, connectors.

Back-light power supply should be in panel specs. 

Please check CN705 for MB60, related connectors for power supply cards.

CI Module Problem

CI is not working when CI module inserted.

Possible causes: Supply, supply control pin, detects pins, mechanical positions of pins

CI supply should be 5V when CI module inserted. If it is not 5V please check CI_POWER_CTRL, this pin should check mechanical positions of CI module.

Detect ports should be low. If it is not low please check CI connector pins, CI module pins and 3V3_VCC on MB60 

Led Blinking Problem

Problem: LED blinking, no other operation

This problem indicates a short on Vcc voltages. Protect pin should be logic high while normal operation.

When there is a short circuit protect pin will be logic low. If you detect logic low on protect pin, unplug

the TV set and control voltage points with a multimeter to find the shorted voltage to ground.

IR Problem

Problem: LED or IR not working

Check LED card supply on MB60 chassis.

Keypad Touchpad Problems

Problem: Keypad or Touchpad is not working

Check keypad supply and KEYBOARD pin on MB60.

USB Problems

Problem: USB is not working or no USB Detection.

Check USB Supply, It should be nearly 5V. Also USB Enable should be logic high.

No Sound Problem

Problem: No audio at main TV speaker outputs.

Check supply voltages of VDD_AUDIO, 5V_VCC and 3V3_VCC with a voltage-meter.

There may be a problem in headphone connector or headphone detect circuit (when headphone is

connected, speakers are automatically muted). Measure voltage at HP_DETECT pin, it should be 3.3v.

No Sound Problem at Headphone

Problem: No audio at headphone output.
Check HP detect pin, when headphone is. Check 5V_VCC and 3V3_VCC with a voltage-meter.

Standby On/Off Problem

Problem: Device cannot boot, TV hangs in standby mode.

There may be a problem about power supply. Check 12V_VCC, 5V_VCC and 3V3_VCC with a voltage

meter. Also there may be a problem about SW. Try to update TV with latest SW. Additionally it is good to

check SW printouts via hyper-terminal (or Teraterm). These printouts may give a clue about the problem.

No Signal Problem

No signal in TV mode.
Check tuner supply voltage; 5V_TUN. Check tuner options are correctly set in Service menu. Check AGC
voltage at RF_AGC pin of tuner.