Hisense CHASSIS:MSD308PX LCD Television – how to enter service mode – how to update the software - 32 inches LED backlight panel

To enter the Factory OSD Menu
a. With factory RC (remote control)
1. Press “M” button and enter factory mode.(Note1)
2. Press “Menu” button and enter factory OSD menu.
3. Press “CH+”/“CH-” button select the function menu, press “VOL+”/“VOL-” enter the selected function menu. Press “VOL+”/“VOL-” button adjust values in the menu.
4. Press “M” button exit factory mode in the factory OSD menu.
When TV outgoing factory, user cannot enter factory OSD menu with Factory Remote
Note:
1. In the “Factory Menu”, item “Function”>”TOFAC” ,you can select “M” or “U”, default is “U”.
- M-Means you can enter factory mode with factory RC or user RC.
- U-Means you can enter factory mode only with user’s RC.
2. Mode “M” is only used for factory production.

With user’s Remote control
Power on the TV.
1. Press “Menu” button and call up User OSD Menu.
2. Select “ Sound” > “Balance” item.
3. Press number key 1>9>6 >9 in sequence when “Balance” item is focused.
Note: If necessary, re-do number keys.
4. Factory OSD appears.
Note: Press the standby button then AC turn off and restart the TV, which can exit factory OSD menu.

Firmware update procedure

Upgrading with the ISP_TOOL
Hardware connecting
You can update the software through a special tool (as following)
Connect the Debug board to the TV use VGA interface or the RS232 (4 pin), the other USB port to the computer.

Install the ISP_TOOL4.5.0.4---- only for the first time update.
1 The software is upgraded by a burning tool- ISP_TOOL.exe
2 Find the folder where the ISP_TOOL4.5.0.4 lies in

There are three folders/files in this folder together.
DLPORTIO.dll and FTD2XX.DLL must be in the same folder
3 Double click the ISP_TOOL4.5.0.4 icon, and then a dialog window will show as below.

4 Click the” Config “button. And then a dialog window will show.

Draw on the front of “Use USB”
Port Type setting is USB
Base Addr setting is 0x38C
ISP Slave Address choose 0x92
Serial Debug Slave Address choose 0xB2，
5 Click the “Connect”button， if appear the following figure, It indicates that the ISP_TOOL has connected.(According to the tv set,”Device Type” maybe different.)

If appear the following figure， It indicates that the ISP_TOOL has not connected. Please click
the“DisCon”button and “Connect”button to connect..

6 Click the“Read ”button, Choose the correct update file.

7 After the update file has been chosen successfully.

Click the“Auto”button and choose parameters as following.

8 Click the “Run” button and wait update end.
If show any error message ， then do “Dis Con” >> “Connect”, and click the “Run” button again, till show the dialog window.

Upgrading with the USB
Software can update with USB device:
1. Copy the “*.BIN” file such as “MERGE.BIN” to the root directory of a USB disk.
2. Insert the USB disk into the USB slot of the TV SET.
3. Press “Menu” button and call up User OSD Menu, choose "Channel ">” Software Update(USB)” item. (Note 1)
4. Press “OK”, it will show a confirm message box, Press [◀] button to select “yes” in the confirm message box, to start automatic update.
5. Then it will update the software automatically, [don’t power off during the updating] process.
6. After the software is successfully upgraded, TV SET will restart automatically.
Note:
1. In some TV SET, ”Software Update(USB)” item maybe in “OPTION” menu.
2. After updating, you must confirm the software version in the “Factory Menu” and you'd better do a “Unprotected Clear" in the “Factory Menu”

Power assign:
The Power only has +12V_IN output ， other voltages are converted from +12V_IN.
a. 5Vstb is converted by N19 from +12V_IN， 5VAIN and 5V_USB are converted by N43 from 5Vstb.
b. 3.3Vstb and 3.3V_mcu as standby power supply for standby mode.
c. 3.3V_Normal supply power for N5 and Main IC N46 is converted by N3 from 5VAIN; 2.5V_Normal supply power for N46 is converted by N13 from 5VAIN; VDDC(1.28V) supply power for main IC(core voltage) is converted by N1 from 5VAIN;1.8VA supply power for N41(DDR),N45(DDR) is converted by N15 from 5VAIN.
e VCC_A supply power for N17(audio amplifier) is converted by N42 from +12V_IN; 5V_Tuner supply power for Tuner is converted by N16 from +12V; 5V_USB supply power for USB interface.
f VCC-Panel supply power for Panel is converted by N14 from +12V_IN

RF Signal

Digital intermediate frequency and simulation intermediate frequency are processed by Tuner (U42) from RF Signal. Transport Stream is demodulated directly by main IC from Digital intermediate frequency then enter PCMCIA card to decipher later return the main IC. The simulation intermediate signal that has passed amplification and surface acoustic wave filter to get intermediate frequency enters the main IC. After processed by main IC, next the video signal is processed by SCALER output LVDS signal.to panel . The audio signal is processed and the Audio amplified to the Speakers.

Control Process：

The Power only has 12V(+12V_IN) output ， other voltages are converted from 12V(+12V_IN). N43 and N42 can interrupt other voltages while standby, only reserve standby 5V(5Vstb) and standby 12V(+12V_IN). as following. When TV Power on , PWR-ON/OFF Signal is Low level, 5VAIN Power supply normally ; otherwise when TV standby , N43 is shut off , 5VAIN Power _supply is low.

+12V standby signal control as similar as 5VAIN

Power on, the Panel _Backlight and Brightness are control by the main board . the PIN 4 of XP2 is BL_ON/OFF, the high or low level control the BL_ON/OFF; the PIN 3 of XP2 is BL_ brightness Adjust, through control the level high or low to control the BL_ brightness.