TCL32T3510 LCD TV How to enter the service menu and software update details, genera; troubleshooting

Test & Alignment: Pre-Conditions and DC/DC Check

Before power on, please check the board according to the relevant block diagram and circuit diagram, and make sure that no serious issue or mistake can destroy the board. For example, the output of DC/DC and LDO should not be shorted to ground.
Supply a suited voltage and power-on, then check the voltage according to the relevant block diagram, circuit diagram and voltage specification within 5% margin.
For example, check SoC voltage (AV3V3, VCCK-1V2, etc.), DDR voltage (DDRV) , amplifier voltage (Main_Power), etc… Only the standby voltage is necessary if there is no software in the flash.

SW Image download
Download the latest release SW from below FTP server:
* Link:xxxxx
* Username: xxxxx* Password: xxxxx* Folder: xxxxx

OAD Transport Stream Image
To manage quicker mass reflashing, a predefined OAD DVB-T channel (freq:850MHz / bandwidth:8MHz) is embedded to SW core and only available into Factory mode. Some licensed IBL tools ('xxx2lli.exe', 'lli2dsm.exe',
dsmmerge.exe, …) from Intellbyte Inc. might be necessary to create appropriate DVB SSU TS. Over some predefine settings such as repeated datablock insertion, null packets size, … (controllable in configuration file), here below are mandatory OUI entries structure to prepare DSM-CC carousel image format:

Note ⑴: SW Entry are referring to following PKG image file name “V8-0MT310x-LF1Vyyy.pkg”
Note ⑵: See enclosed necessary Data Broadcast Carousel configuration file format details (DBC)

OUI Entry	MT31L	MT31B	MT31LB
CUST_OAD_OUI	408BF6	408BF6	408BF6
CUST_OAD_HW_MODEL	0x5881	0x5881	0x5881
CUST_OAD_HW_VERSION	0x0001	0x0001	0x0001
CUST_OAD_SW_MODEL (x)	0x3101	0x3102	0x3102
CUST_OAD_SW_VERSION (yyy)	0x0xxx	0x0xxx	0x0xxx

To build an OAD TS, it’s necessary to create a temporary common and interchangeable DSM file format using below command and arguments:

‘bin2dsm.exe -v -v -v -m0,0,"TCL_HW5881",0 -n200 -z102400 -nz -o%FILE%.dsm -h"OUI=CUST_OAD_OUI
model=CUST_OAD_HW_MODEL version=CUST_OAD_HW_VERSION vm=0xffff" -s"OUI=CUST_OAD_OUI
model=CUST_OAD_SW_MODEL version=CUST_OAD_SW_VERSION vm=0xffff" %FILE%.pkg’
Then, OAD TS can be completed using below command and arguments:
‘dsmsectn.exe -v -dvbssu -mpegts -patpmt -nit_ter -sdt -o%FILE%.ts -gTCL_HW5881.dbc %FILE%.dsm’
For more robustness, TS can be played with following presets such as modulation:QAM-64, guard interval:1/8, coding rate:2/3 to ensure ~22Mbps.
OAD reflashing process is managed within 4 steps operation: multiplex detection, DVB transfer, flashing and warm-start.

UART & IR Parser
To use both UART and/or IR parser, TV has to be set in Factory mode with its VGA port well connected to suitable UART device or an IR emitter device correctly facing up TV (see below “Product Assembly - section 2.0”
how to activate “Factory key”).
The SoC’s RS232 mode is automatically enabled at power-on and doesn’t require any command initialization frame. <0x30 0x30 0x30 0x2E 0x30 0x65 0x30 0x74 0x30 0x0D 0xE2> from host to TV.
So correctly setup UART parser engine for further serial communication, it’s necessary to send following command frame <0xAA 0x06 0x10 0x01 0xA7 0xEF> within following COM presets 115200/8/n/1; “PS” caption might be toggled and displayed on bottom left screen (“S” like Serial) if successful.
To communicate with TV depending on SIACP revision layout implementation, you may need to fulfill UART/IR commands protocol and format described on enclosed SIACP requirements document (rev. v5.9).

ProjectID Modification
There are different IDs stored into system memory depending on different Panels settings and Models features, but there’s only one key branching ProjectID that includes all. So, it’s not recommended to modify PaneID with
Hyper terminal as other ID features may not change.
To modify ProjectID, you need to go through “Factory menu > Other > Project info > Project ID”, and then spin left or right with RCU “◄/►” key” keys to suitable ID (Project name is dynamically refreshed)

Here below is none exhaustive ProjectID table for reference. Project list and all relative information are dispatched and updated as a new firmware package is released.

Project Name	Project ID	Panel
L39F3303F	001	PANEL_CMI_V390HJ1-P02
L39F3393F	002	PANEL_CMI_V390HJ1-P02
L32F3303	003	PANEL_SS_LSC320AN02
L32F3393	004	PANEL_SS_LSC320AN02
39FU5253C	005	PANEL_CMI_V390HJ1-LE1
39FU5253CW	006	PANEL_CMI_V390HJ1-LE1
39FU5243C	007	PANEL_CMI_V390HJ1-LE1
55FU4243C	008	PANEL_SS_LSC550HJ03_8
32HU5253C	010	PANEL_SS_LSC320AN02
32HU5253CW	011	PANEL_SS_LSC320AN02
32HU5243C	012	PANEL_SS_LSC320AN02
…
L28T3540	087

 Functional Test

Once the boards (chassis, KB, IR, PSU…) and the panel are well interconnected, plug all suitable signals generator to relevant below inputs/outputs using respective test patterns format to check picture/sound quality:

Picture/Video formats and Audio tones can be changed by the factory according to their own standard and broadcasted signals (ie: 1KHz & 3KHz, sweep, …)

AD Calibration Test
N/A
As SoC as built-in A/D self-calibration mechanism, there’s not any ADC to perform.

DDC & EDID & T-Link Test
The E-EDID data structures are according to VESA Enhanced EDID 1.4a (and EIA/CEA-861B for HDMI)..
All VGA and HDMI structures have their own BIN profile which are part of firmware and uploaded at power-on.
For EDID check, it’s recommended to check whether the correct EDID is uploaded by checking corresponding
EDID NVM Checksum or read them out to check bit by bit if it is in line with the released EDID bin file.

How to upgrade HDCP KEY by UART

For HDCP compliancy, it’s needed to check whether the HDCP key has been well set by connecting suitable generator signal

IP Return Test

 “How to upgrade MAC address using USB”
All MT31 series platform support IP return function according to CI+ v1.3.
Here are some representative code example:

MAC Address

40-8B-F6-90-4D-53

Note: Testing method is under completion.

Factory Menu (Service mode)
Follow the below steps to pop-up the Factory menu in case of “Factory Key” is disabled:
* Press RCU “MENU” key to display main menu
* Select “Picture” and press “OK” key to enter into Picture submenu. 

Scroll down to “Contrast” item.

* Press the sub-sequence RCU keys “9” “7” “3” and “5”
In case of “Factory Key” is enabled, just press RCU “Return” key to pop-up again the Factory menu.
The status of “Factory Key” can be changed in “Factory Menu > Hotkey”
Press RCU “OK/►” key to enter the submenu.
Press RCU “Menu” key to go back to the root menu.
Press RCU “◄/►” key to change the values.
Press RCU “OK” key run the function.
Press RCU “Exit” key exit the Factory menu.

Factory Captions

While “Factory Key” is enabled, there’re some toggled display information (2s) relative to SW, ProjectID, CI+, NetworkID to facilitate 100% quick screening without accessing to whatever else menu:

Firmware Version (MV) - ‘V8-0MTxxxx-LF1Vyyy’
Project ID (ID) - range [000..999]
CI Key Activation flag (CI+) - ‘NO’= no key, ‘YES’= key activated
HDCP Key (HDCP) - ‘NULL’= no key, ‘YES’= key activated
PVR flag (ERG) - ‘OFF’= disabled, ‘ON’= enabled
P (Production/Factory mode flag) / S (Factory UART Parser mode flag) / W (Warm-Up mode flag).

Channel Map Preset
Region channel Maps are stored in the firmware and can be directly preloaded via Factory menu.
Other faster methods via UART/IR commands are available on enclosed SIACP requirements.

Factory Menu Description: Warm-up Test
Following TCL standard and practices, it’s required minimum 15min of Warm-Up that can be considered as Burn-In. Additional Aging for White Balance alignment is no more necessary due to consistent Picture Performance
with Cloning usage.
This function is accessible by selecting “Factory menu à Burning Mode”, pressing RCU “OK/►” key, to release/disable Burn-in mode, it’s just required to press “Menu” button from local keyboard. Other faster methods
via UART/IR commands are available on enclosed SIACP requirements.

White Balance (WB) Cloning; White Balance Touch-Up (Golden sample)
As some color coordinates discrepancies can be noticed from panel batches to others, it may necessary to perform slight touch-up.
For Color temperature adjustment, switch TV on leading HDMI input where should be connected suitable generator providing following format 1280x720p@60Hz test pattern. A 32 step grey scale is recommended to assess relevant colorimetry tracking and low/high light saturation points.

Make sure Picture Preset is set to “DYNAMIC” mode, both “Contrast” and “Backlight” bar graph are set to “100” (maximum), “Gamma” bargraph are set to “0” (2.2 nominal) and that both “Energy Saving” and “Light Sensor” are set to “Off” from “ECO Settings” subsection.
Ensure that TV is in Factory mode to access to ”White Balance” adjustment submenu, and then scroll down to toggle off “Pic. Enhance” flag.
PC VGA, CMP YPrPb, SCART RGB, CVBS_PAL/SECAM Gain/Offset matrix offsets locations are relative to HDMI/DTV.
Warm and Cool Tone are relatives to Normal mode. WB adjust need to fix default G Gain .
“Gain” registers set need to be adjusted at 70IRE.
“Offsets” registers set can be adjusted at 30IRE, but it’s not recommended to keep them defaulted.
Note: All matrix offsets locations can be individually fine-tuned.

Targets and Tolerances for all inputs
Note: The White balance value is right conformed by PQ Engineer , Except PQ Engineer, anybody cannot change the white balance value and Default value.
The measured and adjustable parameters should be mainly “x”, “y” coordinates (see “TCL EU Picture Quality Requirements for FPDs” for reference).
The signal level check has been down in R&D, Factory should not adjust the scaling Brightness , scaling contrast and scaling saturation.
The White Balance alignment should be performed using a well calibrated and contact less analyzer (ex: CA310).

 The analyzer may not touch the screen surface, and measurement must be performed in a dark environment keeping the probe(s) at 90+/-2° from the panel center.
The results should fulfill following TCL matching requirements (Minolta CA210-CH00 based):

Cloning
To operate master/golden clone and reuse it further on demand, please to follow below Cloning SOP:

All underused BIN image files need to be used strictly with MT5531 SoC platform as depending on SW structure.
Other faster access methods via UART/IR commands are available on enclosed SIACP requirements.

High Pot. and Insulating Resistance Tests

At the end of the process, a “High Voltage” and an “Insulating Resistance” tests are required to fulfill Safety Electrical requirements (CEI 65065)

High Voltage Withstanding requirements > Insulating Resistance requirements
* “Voltage” > 3500 VAC - “Voltage” > 500 VDC
* “Max Leakage Current” > 10 mA - “Threshold Min” > 4M Ω
* “Test Time” > 5 sec - “Test Time” > 3 sec

SHOP-END Test
At final process stage, it’s necessary to perform “Reset shop” before any packing to leave Factory mode and restore User default presets.
This function is accessible by selecting “Factory menu àReset Shop”, then pressing RCU “OK/►” key. Other faster methods via UART/IR commands are available on enclosed SIACP requirements.
“Reset Shop” presets should follow “MT5531_EU_OOB_MenuSetting_step1_Base_01.doc” document.
Note: A password might be required in case of Parental Control function is locked, use default “1234” password or “0423” super password to clean-up existing ones if forgotten.

How to upgrade SW FLASH using MTK tool

Connect UART interface to suitable manufacturing TV input connector (note that PC connector requires TVs on “Factory mode”)
Launch MTK tool with version above v0.6.7
Set right SoC template (ex: MT53xx)

Select “Tool” button.

Press “Browse” button to select the corresponding SW bin file to upload (ex: V8-0MT3101-LF1Vxxx.bin)
Supply the SSB to required voltage.
Press “Upgrade” button and appear the below picture.

Select NOR flash type and press “OK” button to start downloading the SW and wait the gauge displayed “100%” that means the SW has been successfully downloaded.  In the meanwhile, all operations such erasing flash and so… are parsed into the debug window script.

When upgrade is completed, remove UART connection.
Restart SSB (chassis) or TV and wait few seconds for EEPROM update.
Remember to perform “Factory menuàReset ALL“ and then press RCU “OK/►” key if there’s not any subsequent cloning operation.

How to upgrade FLASH SW using USB: Upgrade with Loader
Power-off or switch TV to standby (LED should light on)
Copy the corresponding SW PKG image (ex: “V8-0MT310x-LF1Vxxx.pkg”) into USB stick (pen drive) root path and rename it to “upgrade.pkg”
Plug USB stick to the TV.

While power-on TV if previously off (LED status off), press “Power” button from local keyboard during few seconds to start upgrading process
Release “Power” button once LED is blinking or USB stick starts blinking, TV is uploading SW BIN image
When reflashing is successful, TV should restart automatically after 2min.
Info: If TV doesn’t restart and LED is lightening on, an error may occurred during flashing, check the set, PKG file integrity and try again from 1st step.
Remove USB stick.
Remember to perform “Factory menuàReset ALL“ or “Factory menuàReset Shop“ and then press RCU “OK/►” key if there’s not any subsequent cloning operation.
Switch off TV by removing AC cord.
Reconnect AC cord to restart TV and wait few seconds for EEPROM update.
Note: If “Reset Shop” was performed, a “Welcome Setup” menu should be displayed, otherwise new SW version should be displayed into relevant Factory mode caption info or on bottom of “Factory menu“

Upgrade without Loader (Customer mode)
Copy the corresponding SW PKG image (ex: “V8-0MT310x-LF1Vxxx.pkg”) into USB stick (pen drive) root path and rename it to “upgrade.pkg”
Plug USB stick to the TV.
TV will automatically detect new SW to upgrade and displays below pop-up message:

Press RCU “OK/►” key to start upgrading process and follow instructions till reflashing is successful.
Remove USB stick.
Remember to perform “Factory menuàReset ALL“ or “Factory menuàReset Shop“ and then press RCU “OK/►” key if there’s not any subsequent cloning operation.
Switch off TV by removing AC cord.
Reconnect AC cord to restart TV and wait few seconds for EEPROM update.
Note: If “Reset Shop” was performed, a “Welcome Setup” menu should be displayed, otherwise new SW version should be displayed into relevant Factory mode caption info or on bottom of “Factory menu“

How to upgrade FLASH SW using OAD

OAD Re-flashing
Power-on TV
Set TV to Factory mode (enable Factory key) and/or Burn-in mode if necessary.
Connect RF antenna or whatever air antenna with suitable amplifier from any digital broadcasting system (ex: DTA-115 Multi-Standard VHF/UHF Modulator.
Play DVB MPEG SSU TS, that includes suitable PKG SW image, with right presets (850MHz/8MHz/…) detailed on above.
Send OAD manufacturing IR code [08d/60d] (refer to SIACP document rev. v5.9 for further information) or go to “Factory menuàOtheràOAD update“ and then press RCU “OK/►” key.
OAD will start automatically and several pop-up messages such as scanning/searching, downloading and flashing will be skipped (acknowledged by default).

Once upgrading completed, TV may restart automatically after warm start and implicit Reset All (in case of NVM mapping/signature change) in previous Factory and/or Burn-in mode.

How to change ProjectID with RCU

Process following subsequence IR codes to change projectID: 062598+MENU+xxx (xxx:ProjectID, ex: 003)
Restart TV

How to Upgrade HDCP KEY by UART

Connect UART interface to suitable manufacturing TV input connector.
Launch MTK tool with version above User Tool: FlashTo0l.exe
Open Flash Tool, Select menu bar Confing Item. Select Flash Download option.

Click on “Flash Download option” button and Into option menu.
Setting Start Address:0x007b0000, Area Length:0x00010000. Select OK.

Select menu upgrade icon .and Load bin File need Hdcp key.
Select Upgrade Icon.

Attention: If the upgrade is not successful, Press the computer ESC key when hold on TV, waiting for TV finish up after the upgrade.

How to upgrade CI Key using USB

Copy corresponding “*.key” files into USB stick (pen drive) root path, and renamed them as following “TCL_*.key” if necessary.
Under USB root path, create a new folder named as “XX_” (once the CI key is overwritten, the matching key file will be moved to this folder)
Plug USB stick to the TV

Go to “Factory menu à Other à Update CI+ Credential à Update From USB“ and then press RCU “OK/►” key.

The “Valid” flag should now be enabled (turns to “Yes”), “Custom Code” should displayed “TCL” and “Serial Num.” field should updated with Key number.
Remove USB stick.
Note: If unfortunately the process failed, you may need to download new CI key and repeat operation again.

How to upgrade CI Key using MTK tool

Connect UART interface to suitable manufacturing TV input connector.
Launch MTK tool with version above v2.48-05
Click on “Browse” button and select "All files(*.*)" filter, then browse any “*.key” file.
Modify "Custom Burning Address:" to "790000", then start to upgrade.
Restart TV.

Go to “Factory menu à Other à Update CI+ Credential à Update CI+ Credential”, and then press RCU ”OK/►” key. The “Valid” flag should now be enabled (turns to “Yes”), “Custom Code” should display “TCL” and corresponding “Serial Number” should be updated as well like onto below snapshot:
Remove UART connection.
Note: If unfortunately the process failed, you may need to download new CI key and repeat operation again.

How to upgrade MAC address using USB

MAC for USB upgrade method as following：
Create a new folder (name: _MAC) in the USB disk root directory.
Put the MAC file into the root directory of the USB disk.
Insert the USB disk into TV, in the factory menu, selected other > Update MAC address > Update From USB.

Note: A quick access to suitable submenu item can be achieved by pressing it prefixed RCU key number (ex: pressing “9” to directly highlight “USB Clone” item).

Troubleshooting

How to update the firmware, How to setup the idle current of main amplifier - AV Receiver Yamaha RX-V767/HTR-7063, RX-A800

Updating firmware [Software]

When the following parts are replaced, the firmware must be updated to the latest version.
DIGITAL P.C.B.
IC951 (TI (DSP) flash ROM) of DIGITAL P.C.B

Confirmation of firmware version and checksum
Before and after updating the firmware, check the firmware version and checksum by using the self diagnostic function menu.
Start up the self-diagnostic function and select “S4.
ROM VER/SUM” menu.
Using the sub-menu, have the firmware version and checksum displayed, and note them down.
* When the firmware version is different from written one after updating, perform the updating procedure again from the beginning.

Initializing the back-up IC
(EEPROM: IC903 of the DIGITAL P.C.B.)

After updating the firmware, the back-up IC MUST be initialised by the following procedure to have proper memorisation of the set up information (sound field parameters, system memory and tuner presetting, etc.).

Start up the self-diagnostic function and select “S3.
FACTORY PRESET” menu. (See “SELF-DIAGNOSTIC FUNCTION”)
Select “PRESET RSRV”, press the “MAIN ZONE ” (power) key of this unit to turn off the power once and turn on the power again. Then the back-up IC is initialized.

Required Tools
• BD, DVD or CD player (with DIGITAL OUTPUT (OPTICAL or COAXIAL) jack)
• Optical cable (when OPTICAL jack is used)
• Digital audio pin cable (when COAXIAL jack is used)
• Firmware CD
* Download the latest firmware from the specified download source and create the firmware CD.

Connection
Connect this unit and BD/DVD/CD player as shown below.

Operation Procedures
1. While pressing the “TUNING >>” key of this unit, connect the power cable of this unit to the AC outlet.
The FIRMWARE UPDATE mode is activated and “CDDA Upgrader” is displayed.

2. Play the firmware CD on the BD/DVD/CD player. Writing of the firmware starts automatically.

3. When writing of the firmware is completed, “Update Success”, “Please...” and “Power off!!” are displayed repeatedly.

* If the display remains unchanged for more than 10 seconds after starting the firmware CD play procedure, perform the firmware CD play procedure again from the beginning.
If “FILE CORRUPTED” is displayed after “Address:XXXXXX”, make sure that the written data is not corrupted and perform Steps 1 to 3 of “Operation Procedures” again.
If “Upgrade Failed” is displayed, perform "operation procedures" again from the beginning.

4. Press the “MAIN ZONE ” (power) key of this unit to turn off the power.
5. Eject the firmware CD from the BD/DVD/CD player.
6. Start up the self-diagnostic function and check that the firmware version and checksum are the same as written ones. (See “Confirmation of firmware version and checksum”)

Self-diagnostic function

This unit has self-diagnostic functions that are intended for inspection, measurement and location of faulty point.
There are 24 main menu items, each of which has sub-menu items.

Starting Self-Diagnostic Function.

While pressing the “TONE CONTROL” and “INFO” keys of this unit, press the “MAIN ZONE ”(power) key of this unit to turn on the power.
The self-diagnostic function mode is activated.

Starting Self-Diagnostic Function in the protection cancel mode

If the protection function works and causes hindrance to trouble shoot, cancel the protection function as described below, and it will be possible to enter the self-diagnostic function mode.
(The protection functions other than the excess current detect function will be disabled.)
While pressing the “TONE CONTROL” and “INFO” keys press the “MAIN ZONE ” (power) key to turn on the power and keep pressing those 2 keys for 3 seconds or longer.
The self-diagnostic function mode is activated with the protection functions disabled.
In this mode, the “SLEEP” segment of the FL display of this unit flashes to indicate that the mode is self-diagnostic function mode with the protection functions disabled.

CAUTION
Using this product with the protection function disabled may cause further damage to this unit. Use special care for this point when using this mode.

Cancelling Self-Diagnostic Function

Before cancelling self-diagnostic function, execute setting for FACTORY PRESET of main menu No. S3. (Memory initialisation inhibited or Memory initialised).
* In order to keep the user memory preserved, be sure to select PRESET INHIBIT (Memory initialisation inhibited).
Press the “MAIN ZONE ” (power) key of this unit to turn off the power

Display provided when Self-Diagnostic Function started

The display is as described below depending on the situation the last time the power to this unit is turned off.
When the power is turned off by usual operation:
The FL display of this unit displays “NO PROTECT” then the main menu (sub-menu “A1-1. DSP MARGIN” of main menu No. A1 DSP AUDIO) a few seconds later.

When the protection function worked to turn off the power:
The FL display of this unit displays the data of protection function which worked at that time then the main menu (sub-menu “A1-1. DSP MARGIN” of main menu No. A1 DSP AUDIO) a few seconds later.
Note: At that time if you reactivate the self-diagnostic function after turning off the power once by pressing the “MAIN ZONE ” (power) key, “NO PROTECT” will be displayed because that situation is equal to “1. When the power is turned off by usual operation:” described above.
However the protection function history is stored in a back-up IC with a backup. For details, refer to main menu P2 PROTECTION HISTORY.”

When there is a history of protection function due to excess current.

An excessive current flowed through the power amplifier.
Supplementary information: As current of the power amplifier is detected, the abnormal channel can be identified by checking the current detect transistor.
Turning on the power without correcting the abnormality will cause the protection function to work immediately and the power supply will instantly be shut off.

Notes)
• Applying the power to this unit without correcting the abnormality can be dangerous and cause additional circuit damage. To avoid this, if “I PROTECT” protection function works 1 time, the power will not turn on even when the “MAIN ZONE ” (power) key is pressed. In order to turn on the power again, start up the self-diagnostic function.
• The output transistors in each amplifier channel should be checked for damage before applying power to this unit.
• Amplifier current should be monitored by measuring DC voltage across the emitter resistors for each channel.

When the protection function worked due to abnormal DC output.

Supplementary information: The protection function worked due to a DC voltage appearing at the speaker terminal. Cause could be a defect in the amplifier.
Turning on the power without correcting the abnormality will cause the protection function to work in 3 seconds and the power supply will be shut off.

When the protection function worked due to abnormal voltage in the power supply section.

Supplementary information: The protection function worked due to a defect or overload in the power supply.
Turning on the power without correcting the abnormality will cause the protection function to work in 1 second and the power supply will be shut off.

Notes)
• Applying the power to this unit without correcting the abnormality can be dangerous and cause additional circuit damage. To avoid this, if “PS” and “DC” protection function works 3 times consecutively, the power will not turn on even when the “MAIN ZONE ” (power) key is pressed.
In order to turn on the power again, start up the self-diagnostic function.
• The output transistors in each amplifier channel should be checked for damage before applying power to this unit.
• Amplifier current should be monitored by measuring DC voltage across the emitter resistors for each channel.

The temperature of the heat sink is excessive. Supplementary information: The protection function worked due to the temperature limit being exceeded.
Causes could be poor ventilation or a defect related to the thermal sensor.
Turning on the power without correcting the abnormality will cause the protection function to work in 1 second and the power supply will be shut off.

History of protection function
When the protection function has worked, its history is stored in memory with a backup.
Even if no abnormality is noted while servicing the unit, an abnormality which has occurred previously can be defined as long as the backup data has been stored.
Initial settings used to start Self Diagnostic Function
The following initial settings are used when starting self diagnostic function.
When self-diagnostic function is cancelled, these settings are restored to those before starting self-diagnostic function.
• Master volume: -20 dB / Zone volume: +2.5dB
• Input: HDMI1 / Zone: AUDIO1
• Main menu: A1-1. DSP MARGIN
• Speaker setting: LARGE, Bass out to SWFR (All channels)
• HDMI Control: Off
• Zone: On

Details of Self-Diagnostic Function menu

DSP AUDIO
This menu is used to check audio signal route via DSP.
A1-1. DSP MARGIN
The audio signal is output including the head margin via DSP.
* When input source is stereo, signal is assigned as below.
Front L: Front L, Center, Surround L,
Surround Back L
Front R: Front R, Surround R,
Surround Back R
Front L +10 dB: Sub-woofer.

DSP NON MARGIN
The SUB-WOOFER signal is output including the head margin via DSP.
The audio signal other than SUB-WOOFER is output without including the head margin via DSP.

When the protection function worked due to excessive heat sink temperature.

Confirmation of idling current of amp unit

Right after power is turned on, confirm that the voltage across the terminals of R1152 (SURROUND BACK RCH), R1154 (SURROUND RCH), R1150 (FRONT RCH), R1148 (CENTER), R1149 (FRONT LCH), R1153 (SURROUND LCH), R1151 (SURROUND BACK LCH) are between 0.1mV and 10.0mV.
  If it exceeds 10.0 mV, open (cut off) R1090 (SURROUND BACK RCH), R1092 (SURROUND RCH), R1088 (FRONT RCH), R1086 (CENTER), R1087 (FRONT LCH), R1091 (SURROUND Lch), R1089 (SURROUND BACK LCH) and reconfirm the voltage.

Attention

  If the measured voltage exceeds 10.0mV after an amplifier repair, first check for a defective component before cutting the bias resistor.
  Confirm that the voltage is 0.2 mV to 15.0 mV after 60 minutes.

Vestel 17MB120 main board functions, firmware update, common faults

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MICROCONTROLLER (MSTAR MSD95M0D)
The Si2151 is Silicon Labs' sixth-generation hybrid TV tuner supporting all worldwide terrestrial and cable TV standards. Requiring no external balun, SAW filters, wire wound inductors or LNAs, the Si2151 offers the lowest-cost BOM for a hybrid TV tuner. Also included are an integrated power-on reset circuit and an option for single power supply operation. As with prior-generation Silicon Labs TV tuners, the Si2151 maintains very high linearity and low noise to deliver superior picture quality and a higher number of received stations when compared to other silicon tuners. The Si2151 offers increased immunity to WiFi and LTE interference, eliminating the need for external filtering. For the best performance with next-generation digital TV standards, such as DVB-T2/C2, the Si2151 delivers industry-leading phase noise performance.
MAIN AMPLIFIER (U8) (10W/12W OPTİONS)
AD82587D is a digital audio amplifier capable of driving a pair of 8 ohm, 20W or a single 4 ohm, 40W speaker, both which operate with play music at a 24V supply without external heat-sink or fan requirement.
Using I2C digital control interface, the user can control AD82587D’s input format selection, DRC (dynamic range control), mute and volume control functions. AD82587D has many built-in protection circuits to safeguard AD82587D from connection errors.
SUBWOOFER AMPLIFIER (U9) (12 W)
AD82586C is a digital audio amplifier capable of driving a pair of 8 ohm, 20W operating at 24V supply without external heat-sink or fan requirement with play music.
AD82586C has 20 bands EQ function and can operate 20W stereo or 40W mono optionally.
AD82586C can provide advanced audio processing capabilities, such as volume control, 20 bands speaker EQ, audio mixing, 3D surround and DRC (dynamic range control). These functions are fully programmable via a simple I2C control interface.

Robust protection circuits are provided to protect AD82586C from damage due to accidental erroneous operating condition. AD82586C is more tolerant to noise and PVT (Process, Voltage, and Temperature) variation than the analog Class-AB or Class-D audio amplifier counterpart implemented by analog circuit design. AD82586C is pop free during instantaneous power switch because of its built-in, robust anti-pop circuit.
HEADPHONE AMPLIFIER (U59)
The AD22657B is a 2-Vrms cap-less stereo line driver. The device is ideal for single supply electronics.
Cap-less design can eliminate output dc-blocking capacitors for better low frequency response and save cost.
The AD22657B is capable of delivering 2-Vrms output into a 10k ohm load with 3.3V supply. The gain settings can be set by users from 1V/V to 10V/V externally. The AD22657B has under voltage protection to prevent POP noise. Build-in shutdown control and de-pop control sequence also help AD22657B to be a pop less device.
The AD22657B is available in a 10-pin MSOP package.
Power socket is used for taking voltages which are 12V, 5V and VDD_Audio. These voltages are produced in power board. Also socket is used for giving dimming, backlight and standby signals with power board. It is shown at figure.

VDD_Audio goes directly to the audio side, through power socket other incoming voltages from power card are converted several voltages.
TPS54528
The TPS54528 is an adaptive on-time D-CAP2 mode synchronous buck converter.The TPS54528 enables system designers to complete the suite of various end-equipment power bus regulators with a cost effective, low component count, low standby current solution. The main control loop for the TPS54528 uses the D-CAP2 mode control that provides a fast transient response with no external compensation components. The adaptive on-time control supports seamless transition between PWM mode at higher load conditions and Eco-mode operation at light loads. Eco-mode allows the TSP54528 to maintain high efficiency during lighter load conditions. The TPS54528 also has a proprietary circuit that enables the device to adopt to both low equivalent series resistance (ESR)output capacitors, such as POSCAP or SP-CAP, and ultra-low ESR ceramic capacitors.
The device operates from 4.5-V to 18-V VIN input. The output voltage can be programmed between 0.76 V and 6 V. The device also features an adjustable soft start time. The TPS54528 is available in the 8-pin DDA package, and designed to operate from -40 C to 85 C.
TPS54628
The TPS54628 is an adaptive on-time D-CAP2 mode synchronous buck converter. The TPS54628 enables system designers to complete the suite of various end-equipment power bus regulators with a cost effective, low component count, low standby current solution. The main control loop for the TPS54628 uses the D-CAP2 mode control that provides a fast transient response with no external compensation components. The adaptive on-time control supports seamless transition between PWM mode at higher load conditions and Eco-mode operation at light loads. Eco-mode allows the TSP54628 to maintain high efficiency during lighter load conditions. The TPS54628 also has a proprietary circuit that enables the device to adopt to both low equivalent series resistance (ESR)output capacitors, such as POSCAP or SP-CAP, and ultra-low ESR ceramic capacitors.
The device operates from 4.5-V to 18-V VIN input. The output voltage can be programmed between 0.76 V and 7 V. The device also features an adjustable soft start time. The TPS54628 is available in the 8-pin DDA and 10-pin DRC packages, and is designed to operate over the ambient temperature range of -40C to 85C.
TPS54821
The TPS54821 in thermally enhanced 3.5 mm x 3.5 mm QFN package is a full featured 17 V, 8 A synchronous step down converter which is optimized for small designs through high efficiency and integrating the high-side and low-side MOSFETs. Further space savings are achieved through current mode control, which reduces component count, and by selecting a high switching frequency, reducing the inductor's footprint. The output voltage startup ramp is controlled by the SS/TR pin which allows operation as either a stand-alone power supply or in tracking situations. Power sequencing is also possible by correctly configuring the enable and the open drain power good pins. Cycle by cycle current limiting on the high-side FET protects the device in overload situations and is enhanced by a low-side sourcing current limit which prevents current runaway. There is also a low-side sinking current limit which turns off the low-side MOSFET to prevent excessive reverse current. Hiccup protection will be triggered if the overcurrent condition has persisted for longer than the preset time. Thermal hiccup protection disables the device when the die temperature exceeds the thermal shutdown temperature and enables the part again after the built-in thermal shutdown hiccup time.
FDS4685
This P-Channel MOSFET is a rugged gate version of Fairchild Semiconductor’s advanced Power Trench process. It has been optimized for power management applications requiring a wide range of gate drive voltage ratings (4.5V – 20V).
APL5910
The APL5910 is a 1A ultra low dropout linear regulator. The IC needs two supply voltages, one is a control voltage (VCNTL) for the control circuitry, the other is a main supply voltage (VIN) for power conversion, to reduce power dissipation and provide extremely low dropout voltage. The APL5910 integrates many functions.
A Power-On- Reset (POR) circuit monitors both supply voltages on VCNTL and VIN pins to prevent erroneous operations. The functions of thermal shutdown and current-limit protect the device against thermal and current over-loads. A POK indicates that the output voltage status with a delay time set internally. It can control other converter for power sequence. The APL5910 can be enabled by other power systems. Pulling and holding the EN voltage below 0.4V shuts off the output.
The APL5910 is available in a SOP-8P package which features small size as SOP-8 and an Exposed Pad to reduce the junction-to-case resistance to extend power range of applications.
HYNİX H5TQ2G63GFR: 2GB DDR3 SDRAM
The H5TQ2G83GFR-xxC, H5TQ2G63GFR-xxC, H5TQ2G83GFR-xxI, H5TQ2G63GFR-xxI, H5TQ2G83GFRxxL, H5TQ2G63GFR-xxL, H5TQ2G83GFR-xxJ, H5TQ2G63GFR-xxJ are a 2, 147, 483, 648-bit CMOS Double Data Rate III (DDR3) Synchronous DRAM, ideally suited for the main memory applications which requires large memory density and high bandwidth. SK Hynix 2Gb DDR3 SDRAMs offer fully synchronous operations referenced to both rising and falling edges of the clock. While all addresses and control inputs are latched on the rising edges of the CK (falling edges of the CK), Data, Data strobes and Write data masks inputs are sampled on both rising and falling edges of it. The data paths are internally pipelined and 8-bit pre-fetched to achieve very high bandwidth.
HYNİX H5TQ4G63GFR: 4GB DDR3L SDRAM 
The H5TC4G83CFR-xxA(I,L,J),H5TQC4G63CFR-xxA(I,L,J) are a 4Gb low power Double Data Rate III (DDR3L) Synchronous DRAM, ideally suited for the main memory applications which requires large memory density, high bandwidth and low power operation at 1.35V. SK Hynix DDR3L SDRAM provides backward compatibility with the 1.5V DDR3 based environment without any changes. SK Hynix 4Gb DDR3L SDRAMs offer fully synchronous operations referenced to both rising and falling edges of the clock. While all addresses and control inputs are latched on the rising edges of the clock (falling edges of the clock), data, data strobes and write data masks inputs are sampled on both rising and falling edges of it. The data paths are internally pipe lined. and 8-bit prefetched to achieve very high bandwidth.
MT29F4G08ABAEAWP: 32GBIT (4G X 8 BIT) NAND FLASH MEMORY
Micron NAND Flash devices include an asynchronous data interface for high-performance I/O operations.These devices use a highly multiplexed 8-bit bus (I/Ox) to transfer commands, address, and data. There are five control signals used to implement the asynchronous data interface: CE#, CLE, ALE, WE#, and RE#. Additional signals control hardware write protection and monitor device status (R/B#).This hardware interface creates a low pin-count device with a standard pin out that remains the same from one density to another, enabling future upgrades to higher densities with no board redesign. A target is the unit of memory accessed by a chip enable signal.
A target contains one or more NAND Flash die. A NAND Flash die is the minimum unit that can independently execute commands and report status. A NAND Flash die, in the ONFI specification, is referred to as a logical unit (LUN). There is at least one NAND Flash die per chip enable signal.
MX25L1606E SPI FLASH: 16M-BIT [16M X 1] CMOS SERIAL FLASH EEPROM
The device feature a serial peripheral interface and software protocol allowing operation on a simple 3-wire bus. The three bus signals are a clock input (SCLK), a serial data input (SI), and a serial data output (SO). Serial access to the device is enabled by CS# input.
When it is in Dual Output read mode, the SI and SO pins become SIO0 and SIO1 pins for data output.The device provides sequential read operation on whole chip.  After program/erase command is issued, auto program/ erase algorithms which program/ erase and verify the specified page or sector/block locations will be executed. Program command is executed on byte basis, or page basis, or word basis for erase command is executes on sector, or block, or whole chip basis.To provide user with ease of interface, a status register is included to indicate the status of the chip. The status read command can be issued to detect completion status of a program or erase operation via WIP bit.  Advanced security features enhance the protection and security functions. When the device is not in operation and CS# is high, it is put in standby mode. The device utilizes Macronix's proprietary memory cell, which reliably stores memory contents even after typical 100,000 program and erase cycles.
M25Q32FV SPI FLASH
This W25Q32FV (32M-bit) Serial Flash memory provides a storage solution for systems with limited space, pins and power. The 25Q series offers flexibility and performance well beyond ordinary Serial Flash devices.
They are ideal for code shadowing to RAM, executing code directly from Dual/Quad SPI (XIP) and storing voice, text and data. The device operates on a single 2.7V to 3.6V power supply with current consumption as low as 4mA active and 1uA for power-down. All devices are offered in space-saving packages.
The W25Q32FV array is organized into 16,384 programmable pages of 256-bytes each. Up to 256 bytes can be programmed at a time. Pages can be erased in groups of 16 (4KB sector erase), groups of 128 (32KB block erase), groups of 256 (64KB block erase) or the entire chip (chip erase). The W25Q32FV has 1,024 erasable sectors and 64 erasable blocks respectively. The small 4KB sectors allow for greater flexibility in applications that require data and parameter storage.
The W25Q32FV support the standard Serial Peripheral Interface (SPI), Dual/Quad I/O SPI as well as 2-clocks instruction cycle Quad Peripharel Interface (QPI): Serial Clock, Chip Select, Serial Data I/O0 (DI), I/O1 (D0), I/O2 (/WP), and I/O3 (/HOLD). SPI clock frequencies of up to 104MHz are supported allowing equivalent clock rates of 208MHz (104MHz x 2) for Duad I/O and 416Mhz (104MHz x 4) for Quad I/O when using the Fast Read Dual/Quad I/O and QPI instructions. These transfer rates can outperform standard Asynchronous 8 an 16-bit Parallel Flash memories. The Continuous Read Mode allows for efficient memory Access with as few as 8-clocks of instruction-overhead to read a 24-bit address, allowing true XIP(execute in place) operation.
MSB1246 DVB-T2
The MSB1246 is a single chip demodulator supporting DVB-T2, DVB-T, DVB-C, DVB-S2 and DVB-S standards. The device integrates a house keeping microcontroller that takes care of all real time and algorithmic tasks simplifying the host control interface.
For DVB-T2/T/C, the MSB1246 front end can accept tuners that provide IF or low IF output. For DVBS2/S, the MSB1246 front end can accept tuners that provide zero-IF output. A high rejection channel filter has been included easing the channel filtering requirement of the tuner whilst still meeting the stringent requirements for adjacent channel interference. The MSB1246 may be clocked directly using a crystal, typically 24MHz.
The MSB1246 is capable of blind acquisition of DVB-T/T2, DVB-C and DVB-S2/S signals. All parameters may be detected in this mode enabling fast and accurate auto scanning. Its frequency recovery circuit is able to compensate for all typical tuner and broadcast frequency errors.
TPS65233: LNB SUPPLY AND CONTROL IC
Designed for analog and digital satellite receivers, the TPS65233 is a monolithic voltage regulator with I2C interface, specifically to provide the 13-V/18-V power supply and the 22-kHz tone signaling to the LNB down converter in the antenna dish or to the multi-switch box. It offers a complete solution with very low component count, low power dissipation together with simple design and I2C standard interfacing. TPS65233 features high power efficiency. The boost converter integrates a 120-mΩ power MOSFET running at 500-kHz switching frequency. Drop out voltage at the linear regulator is 0.8 V to minimize power loss. TPS65233 provides multiple ways to generate the 22-kHz signal. Integrated linear regulator with push-pull output stage generates clean 22-kHz tone signal superimposed at the output even at zero loading. Current limit of linear regulator can be programmed by external resistor with ±10% accuracy. Full range of diagnostic read by I2C is available for system monitoring.
MAIN SW UPDATE
In MB120 project, follow software update procedure:
1. mb120_en.bin, RomBoot.bin, PM51.bin and usb_auto_update_G6F.txt documents should be copied directly inside of a flash memory (not in a folder).
2. Insert flash memory to the TV when TV is powered off.
3. While pushing the OK button in remote control, power on and wait. TV will power-up itself.
4. If First Time Installation screen comes, it means software update procedure is successful.
NO BACKLİGHT PROBLEM
If TV is working, led is normal and there is no picture and back light on the panel.
Possible causes: Back-light pin, dimming pin, back-light supply, stby on/off pin BACK-LIGHT_ON/OFF pin should be high when the backlight is ON. R89 must be low when the back-light is OFF. If it is a problem, check Q10 and the panel cables. Also it can be tested in TP137 on main board.
Dimming pin should be high or square wave in open position. If it is low, please check S97 for Mstar side and panel or power cables, connectors.
Back-light power supply should be in panel specs. Please check Q44, shown below; also it can be checked TP175.
STBY_ON/OFF_NOT should be low for tv on condition, please check Q23’s collector.

CI MODULE PROBLEM
CI is not working when CI module inserted.
Possible couses: Supply, suply control pin, detect pins, mechanical positions of pins.
CI supply should be 5V when CI module inserted. If it is not 5V please check CI_PWR_CTRL, this pin should be low. Check mechanical position of CI module. Is it inserted properly or not?
Detect ports should be low. If it is not low check CI connector pins, CI module pins.

STAYİNG İN STAND-BY MODE
Staying in stand-by mode, 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.

NO SOUND PROBLEM
No audio at main TV speaker outputs.
Check supply voltages of 24V_VCC, VDD_AUDIO_MAIN and 3.3V_AMP 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.
STANDBY ON/OFF PROBLEM
Device can not boot, TV hangs in standby mode.There may be a problem about power supply. Check main supplies 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 Teraterm. These printouts may give a clue about the problem. You can use mini scart for terraterm connection.
NO SİGNAL PROBLEM
No signal in TV mode.
Check tuner supply voltage 3V3_TUNER and. Check tuner options are correctly set in Service menu. Check voltage at TUNER_SCL and TUNER_SDA pin of tuner.

Main and Sub-Woofer amplifier schematic

LT 26C31BC JVC D.I.S.T - wide LCD panel television service mode, SMPS schematic

D.I.S.T [Digital Image Scaling Technology],

Sound System: A2 (B/G, D/K), NICAM (B/G, I, D/K, L)

Color System: PAL / SECAM / NTSC 3.58 / NTSC 4.43 (NTSC:EXT only)

Remote Control Unit: RM-C1808 (AA/R6 dry cell battery × 2)

DIST (Digital Image Scaling Technology) employs an interpolation method that doubles the scanning lines to realize 1250-line flickerfree picture making it especially suitable for reproducing high resolution pictures even on large-screen displays.

Pixel fault
There are three pixel faults - bright fault , dark fault and flicker fault - that are respectively defined as follows.
(1) BRIGHT FAULT
In this pixel fault, a cell that should not light originally is lighting on and off. For checking this pixel fault, input ALL BLACK SCREEN and find out the cell that is lighting on and off.
(2) Dark fault
In this pixel fault, a cell that should light originally is not lighting or lighting with the brightness twice as brighter as originally lighting. For checking this pixel fault, input 100% of each R/G/B color and find out the cell that is not lighting.
(3) Flicker fault
In the pixel fault, a cell that should light originally or not light originally is flashing on and off. For checking this pixel fault, input ALL BLACK SCREEN signal or 100% of each RGB color and find out the cell that is flashing on and off.

Replacement of memory IC
This unit uses the nonvolatile memory IC. The memory IC memories data for video and deflection circuits. To replace the memory IC without the data written, malfunctions might occurred while power is on, and the normal image might not appear. When replacing the memory IC, be sure to use the IC written with the initial values of data.
Procedure for replacing the memory IC
(1) Switch the power off and unplug the power cord from the wall outlet.
(2) Replacing the memory IC. [Be sure to use the IC written with the initial values of data]
(3) Plug the power cord into the wall outlet and switch the power on.
(4) Check and setting of SYSTEM CONSTANT SET
a) Press the [INFORMATION] key and [MUTING] key on the remote control unit simultaneously.
The SERVICE MENU screen will be displayed.
b) In the SERVICE MENU, press the [INFORMATION] key and [MUTING] key simultaneously.
Then, the SYSTEM CONSTANT SET screen will be displayed.
c) Check whether the setting value of the SYSTEM CONSTANT SET is the same as these indicated.
d) Press the [INFORMATION] key twice to return to the normal screen.
(5) Receive channel setting.  Refer to the OPERATING INSTRUCTIONS and set the receive channels.
(6) User setting
Memories the user setting items. The [USER SETTINGS OF MENU] setting.
(7) Setting of SERVICE MENU
Check the setting items in the SERVICE MENU, set if necessary.

Setting of VSM preset
(1) Enter "5.VSM PRESET" from the SERVICE MENU.
(2) Press the [OK] key to select BRIGHT/STD/SOFT/COOL/NORMAL/WARM mode.
(3) Select the setting item using the [FUNCTION (UP/DOWN)] key.
(4) Set the value using the [FUNCTION (+/-)] key.
(5) Press the [OK] key to memorize the set value.
(6) Press the [INFORMATION] key twice to return to the normal screen.

Adjustment preparation
(1) Prior to the following procedure, be sure to connect the receiver unit and the display unit.
(2) Adjustment of many majorities of the adjustment items for this unit is performed using the remote control.
(3) However, adjustment of some adjustment items is performed in the conventional way, i.e. with components on the boards.
(4) Ensure that the power supply is AC220V.
(5) Allow the set and the measuring devices to run for at least 30 minutes.
(6) Do not alter settings of items/preset values on the service screen that are not stated here.
(7) Unless otherwise stated in the “ADJUSTMENT PROCEDURE” section, follow the settings for the features using the remote control.

Service adjustment flowchart

Power board [SMPS] schematic

How to enter the service menu mode
(1) Press the [INFORMATION] key and the [MUTING] key of the REMOTE CONTROL UNIT simultaneously, and the SERVICE MENU screen  will be displayed.
(2) When the Main Menu is displayed, press any key of the [1] to [0] key to enter the corresponding menu mode.
*Press any of the [1] to [0] keys before the Service Menu mode disappears.
(3) Select the service item using the [FUNCTION Up/Dn key.
(4) Set the value using the [FUNCTION L/R key.
(5) Press the [OK] key to save the value.

How to exit the service menu mode
Press the [INFORMATION] key to exit the Service Menu mode.

Child lock

When there is a TV channel you wish your children not to watch, you can use the CHILD LOCK function to lock out the TV channel. Even when a child chooses a Programme number (PR) in which a locked TV channel has been registered, the screen will change to blue and displaysn (CHILD LOCK) so the TV channel cannot be viewed.
Unless you enter a pre-set ID number by a special operation, the lock cannot be released and the child cannot view the TV channel programmes.

Press the blue button and set the CHILD LOCK function.
Then press the button
(CHILD LOCK) appears and the TV channel is locked.

To reset the CHILD LOCK function:
Press the blue button again. (CHILD LOCK) disappears.

To disable easy resetting of the CHILD LOCK function, the menu disappears by choosing the CHILD LOCK function and pressing the a button as in the ordinary menu operation.

32PFL3505D/F7 Philips (Serial No.: DS1A, DS2A, DS3A, YA1A) LCD TV service mode adjustments, SMPS and back-light inverter schematic

Philips 32PFL3515D/F7 PHILIPS (Serial No.: YA1A), 32PFL3505D/F7 PHILIPS (Serial No.: DS4A), 32PFL3505D/F7 PHILIPS (Serial No.: DS8A, DS9A, YA2A, YA4A)

Service mode
1. Turn the power on.
2. Press [MENU] button to display Setup menu.
3. Select the “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 pressing [7] button on the remote control unit, the display changes as follows:

1. Operate the unit for more than 60 minutes.
2. Set the colour analyser and bring the optical receptor to the centre on the LCD-Panel surface after zero point calibration as shown above.
Note: The optical receptor must be set perpendicularly to the LCD Panel surface.
3. Enter the Service mode.
4. Press [3] button on the remote control unit.
5. Press [CHANNEL UP/DOWN] buttons on the remote control unit so that the colour analyser value becomes minimum.
6. To cancel or to exit from the VCOM Adjustment, press [PREV CH] button.

White Balance Adjustment
To mix red, green and blue beams correctly for pure white.
Symptom of Maladjustment: White becomes bluish or reddish.

1. Operate the unit for more than 60 minutes.
2. Input the White Raster(70%=70IRE, 40%=40IRE)

3. Set the colour analyser to the CHROMA mode and bring the optical receptor to the centre on the LCD-Panel surface after zero point calibration.

Note: The optical receptor must be set perpendicularly to the LCD Panel surface.
4. Enter the Service mode. Press [VOLUME DOWN] button on the remote control unit and select “C/D” mode.

 [CUTOFF]
Press [1] button to select “COR” for Red Cutoff adjustment. Press [3] button to select “COB” for Blue Cutoff adjustment.
 [DRIVE]
Press [4] button to select “DR” for Red Drive adjustment. Press [6] button to select “DB” for Blue Drive adjustment.
6. In each colour mode, press [CHANNEL UP/DOWN] buttons to adjust the values of colour.
7. Adjust Cutoff and Drive so that the colour temperature becomes 12000°K (x= 0.272 / y=0.278 ±0.005).
8. To cancel or to exit from the White Balance Adjustment, press [PREV CH] button.

To initialise the LCD TV
The purpose of initialisation 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 initialised.
To put the program back at the factory-default, initialise 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 [INFO] button on the remote control unit to initialise the LCD television.
4. "INITIALIZED" will appear in the upper right of the screen. "INITIALIZED" color will change to green from red when initialising is completed.

SMPS [Power board] schematic

Back-Light inverter schematic

Purity check mode

Firmware Update

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

User Upgrade:  Upgrade the firmware only. The setting values are not initialised.

Factory upgrade: Upgrade the firmware and initialise the setting values.

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 following will appear.

If the screen isn’t displayed, repeat from step 1.

5. When the firmware update is completed, the following will appear on the screen.

Remove the USB storage device from the USB port.
Turn the power off and turn the power on again.
Note: When the Factory Upgrade is used, after restarting TV, shift to initial screen menu in service mode. "INITIALIZED" will appear on the upper right of the screen. "INITIALIZED" colour will change to green from red when initialising is completed.