AOC 198PW – 19 inch TFT LCD TV – Service mode – software update – power and inverter board schematic

How to enter the Service Mode, How to update the firmware, SMPS and back-light inverter circuit diagram - AOC 198PW-  - 19 inch TFT LCD TV

This monitor is equipped with VESA DDC2B capabilities according to the VESA DDC STANDARD. It allows the monitor to inform the host system of its identity and, depending on the level of DDC used, communicate additional information about its display capabilities.
The DDC2B is a bi-directional data channel based on the I2C protocol. The host can request EDID information over the DDC2B channel.

-Take care during handling the LCD module with back-light unit
-Must mount the module using mounting holes arranged in four corners.
-Do not press on the panel, edge of the frame strongly or electric shock as this will result in damage to the screen.
-Do not scratch or press on the panel with any sharp objects, such as pencil or pen as this may result in damage to the panel.
-Protect the module from the ESD as it may damage the electronic circuit (C-MOS).
-Make certain that treatment person’s body is grounded through wristband.
-Do not leave the module in high temperature and in areas of high humidity for a long time.
-Avoid contact with water as it may a short circuit within the module.
-If the surface of panel becomes dirty, please wipe it off with a soft material. (Cleaning with a dirty or rough cloth may damage the panel.)

Factory (Service Mode) modes adjustment
To enter the factory mode
Turn on power, pull out the power cord,

 press the Menu button,

 and then plug the power cord. 

that will Auto adjust the picture to default. At the same time the factory OSD will be at the left top of the panel.

Bias adjustment

Set the Contrast to 50.
Set the Brightness to 80.
B. Gain adjustment:
Move cursor to “-F-” and press MENU key
Adjust 7800k color-temperature
1 Select the “AUTO LEVEL” option to auto adjust the picture to default,
2 Press “MENU” button, adjust 7800K color-temperature and the parameter is
x = 296 ±20, y = 311 ±20, Y = 180 ±10 cd/m2
Adjust 6500k color-temperature
1 Select the “AUTO LEVEL” option to auto adjust the picture to default,
2 Press “MENU” button, adjust 6500K color-temperature and the parameter is
x = 313 ±20, y = 329 ±20, Y = 180 ±10 cd/m2
Turn off the Power-button to quit from factory mode.

Firmware [Software Update]

Connecting to a computer

1. Connect the power cable to the AC port on the back of the monitor.
2. Connect one end of the 15-pin DVI-I cable to the back of the monitor and connect the other end to the computer's D-Sub port.
3. Connect the audio cable to audio in port on the back of the monitor
4. Connect the microphone cable to audio in port on the back of the monitor
5. Turn on your monitor and computer.

AOC 198PW power adapter board schematic 

AOC 198PW inverter board schematic

ISP Instruction

ISP tools requirement

1. 25PIN LPT cable.

2. MYSON burn-in board,

3. DVI-VGA cable

Change to VGA Mode

(1) Run MYSON MCU ISP burn-in tool,

(2) Set parameter,

3) Lode burn-in file,
Select the MCU software in 198PW ISP_CODE, then click “Open” button.

(4) When the file was loaded, then click “confirm” button.

(5) Click “RUN”, burn-in is in progress

6) burn-in is completed,

Vestel 17MB35 – LCD TV main board – How to enter service mode, How to update the software

Used with Orion  TV19PL120DVD, JVC LT-40DG20J, L556VN05U, Xeniux-LCDX32WHD88, HitachiL26HP03U, Hitachi LC42VC04UJ, Luxor LUX42-742  and many more brand LCD TVs

17MB35 Main Board consists of MSTAR concept. This IC is capable of handling Audio processing, video processing, Scaling-Display processing, 3D comb filter, OSD and text
processing, 8 bit dual LVDS transmitter.
TV supports PAL, SECAM, NTSC colour standards and multiple transmission standards as B/G, D/K, I/I’, and L/L’ including German and NICAM stereo.
Sound system output is supplying 2x10W (10%THD) for stereo 8Ω speakers.

TUNER
A horizontal mounted and Digital Half-Nim tuner is used in the product, which covers 3 Bands(From 48MHz to 862MHz for COFDM, from 45.25MHz to 863.25MHz for CCIR
CH). The tuning is available through the digitally controlled I2C bus (PLL). 

17MB35 uses a 20W Class D Stereo Single Ended Audio Amplifer for audio. The MP7722 is a stereo 20W Class D Audio Amplifier. It is one of MPS’ second generation of fully integrated audio amplifiers which dramatically reduces solution size by integrating the following:

* 180mΩ power MOSFETs

* Startup / Shutdown pop elimination

* Short circuit protection* Mute / Standby
The MP7722 utilizes a single ended output structure capable of delivering 2 x 20W into 4Ω speakers. MPS Class D Audio Amplifiers exhibit the high fidelity of a Class A/B amplifier at efficiencies greater than 90%. The circuit is based on the MPS’ proprietary variable frequency topology that delivers low distortion, fast response time and operates on a single power supply.

POWER STAGE
The DC voltages required at various parts of the chassis and inverters are provided by a main power supply unit. The power supply generates 33V, 24V, 12V, 5V, 3,3V and 5V, 3,3V stand by mode DC voltages. 

Power stage which is on-chasis generates 1,26V stand by voltage and 8V, 2,6V, 1,8V and 1V supplies for other different parts of the chassis.

MICROCONTROLLER (MSTAR)

The MST6WB7GQ-3 is a high performance and fully integrated IC for multi-function LCD monitor/TV with resolutions up to full HD (1920x1080). It is configured with an integrated triple-ADC/PLL, an integrated DVI/HDCP/HDMI receiver, a multi-standard TV video and audio decoder, two video de-interlacers, two scaling engines, the MStarACE-3 color engine, an on-screen display controller, an 8-bit MCU and a built-in output panel interface. By use of external frame buffer, PIP/POP is provided for multimedia applications. Furthermore, 3-D video decoding and processing are fulfilled for high-quality TV applications. To further reduce system costs, the MST6WB7GQ-3 also integrates intelligent power management control capability for green-mode requirements and spread-spectrum support for EMI management.

The STV0297E is a complete single-chip QAM (quadrature amplitude modulation) demodulation and FEC (forward error correction) solution that performs sampled IF to transport stream (MPEG-2 or MPEG-4) block processing of QAM signals. It is intended for the digital transmission of compressed television, sound, and data services over

cable. It is fully compliant with ITU-T J83 Annexes A/C or DVB-C specification bit streams (ETS 300 429, “Digital broadcasting systems for television, sound and data services – Framing structure, channel coding and modulation - Cable Systems”). It can handle square (16, 64, 256-QAM) and non-square (32, 128-QAM) constellations.

Japanese DBS systems require a transport stream multiplex frame (TSMF) layer to carry digital signals over cable systems. When the recovered transport stream is a multiplex frame, the STV0297E post-processes it to extract a single transport stream.
Automatic detection of the TSMF layer is provided. 

The chip integrates an analog-to digital converter that delivers the required performance to handle up to 256-QAM signals in a direct IF sampling architecture, thus eliminating the need for external down conversion.

2048-Bits Serial EEPROM – 24LC02 [System Memory]
The 24LC01/02 is a 1K/2K-bit serial read/write non-volatile memory device using the CMOS floating gate process. Its 1024/2048 bits of memory are organized into 128/256 words and each word is 8 bits. The device is optimized for use in many industrial and commercial applications where low power and low voltage operation are essential. Up to eight HT24LC01/02 devices may be connected to the same two-wire bus. 

The HT24LC01/02 is guaranteed for 1M erase/write cycles and 40-year data retention.

32K Smart Serial EEPROM – 24C32

The Microchip Technology Inc. 24C32 is a 4K x 8 (32K bit) Serial Electrically Erasable PROM. This device has been developed for advanced, low power applications such as

personal communications or data acquisition. The 24C32 features an input cache for fast write loads with a capacity of eight 8-byte pages, or 64 bytes. It also features a fixed 4K-bit block of ultra-high endurance memory for data that changes frequently. The 24C32 is capable of both random and sequential reads up to the 32K boundary.
Functional address lines allow up to eight 24C32 devices on the same bus, for up to 256K bits address space. Advanced CMOS technology makes this device ideal for lowpower non-volatile code and data applications. 

The 24C32 is available in the standard 8-pin plastic DIP and 8-pin surface mount SOIC package.

FDN336P

The ST24LC21 is a 1K bit electrically erasable programmable memory (EEPROM), organized by 8 bits.This device can operate in two modes: 

Transmit Only mode and I2C
bidirectional mode. 

When powered, the device is in Transmit Only mode with EEPROM data clocked out from the rising edge of the signal applied on VCLK. The device will switch to the I2C bidirectional mode upon the falling edge of the signal applied on SCL pin. The ST24LC21 cannot switch from the I2C bidirectional mode to the Transmit Only mode (except when the power supply is removed). The device operates with a power supply value as low as 2.5V. Both Plastic Dual-in-Line and Plastic Small Outline packages are available. 

PI5V330

Pericom Semiconductos PI5V series of mixed signal video circuits are produced in the Company's advanced CMOS low-power technology, achieving industry leading performance. The PI5V330 is a true bidirectional Quad 2-channel multiplexer/demultiplexer that is recommended for both RGB and composite video switching applications. The Video Switch. can be driven from a current output RAMDAC or voltage output composite video source. Low ON-resistance and wide bandwidth make it ideal for video and other applications. Also this device has exceptionally high current capability which is far greater than most analog switches offered today. A single 5V supply is all that is required for operation. The PI5V330 offers a high-performance, low-cost solution to switch between video sources. 

AZC099-04S

AZC099-04S is a high performance and low cost design which includes surge rated diode arrays to protect high speed data interfaces. The AZC099-04S family has been
specifically designed to protect sensitive components, which are connected to data and transmission lines, from over-voltage caused by Electrostatic Discharging (ESD),
Electrical Fast Transients (EFT), and Lightning.
AZC099-04S is a unique design which includes surge rated, low capacitance steering diodes and a unique design of clamping cell which is an equivalent TVS diode in a single package. During transient conditions, the steering diodes direct the transient to either the power supply line or to the ground line. The internal unique design of clamping cell prevents over-voltage on the power line, protecting any downstream components.
AZC099-04S may be used to meet the ESD immunity requirements of IEC 61000-4-2, Level 4 (± 15kV air, ±8kV contact discharge).

TDA1308

The TDA1308; TDA1308A is an integrated class-AB stereo headphone driver contained in  an SO8, DIP8 or a TSSOP8 plastic package. The TDA1308AUK is available in an 8 bump wafer level chip-size package (WLCSP8). The device is fabricated in a 1 mm. Complementary Metal Oxide Semiconductor (CMOS) process and has been primarily developed for portable digital audio applications. The difference between the TDA1308 and the TDA1308A is that the TDA1308A can be used at low supply voltages.

ST3222

The ST3222 is a 3V powered EIA/TIA-232 and V.28/V.24 communications interface with low power requirements and high data-rate capabilities. ST3222 has a proprietary low dropout transmitter output stage providing true RS-232 performance from 3 to 3.6V power supplies. The device requires only four small 0.1mF standard external capacitors for operating from 3V supply. The ST3222 has two receivers and two drivers. The ST3222 features a 1mA shutdown mode that reduces power consumption and extends battery life in portable systems. Its receivers can remain active in shutdown mode, allowing external devices such as modems to be monitored using only 1mA supply current. The device is guaranteed to run at data rates of 250Kbps while maintaining RS-232 output levels.

MP1583

The MP1583 is a step-down regulator with a built in internal Power MOSFET. It achieves 3A continuous output current over a wide input supply range with excellent load and line regulation.
Current mode operation provides fast transient response and eases loop stabilization.
Fault condition protection includes cycle-by-cycle current limiting and thermal shutdown.
Adjustable soft-start reduces the stress on the input source at turn-on. In shutdown mode the regulator draws 20µA of supply current.
The MP1583 requires a minimum number of readily available external components to complete a 3A step down DC to DC converter solution.

MP2112

The MP2112 is a 1MHz constant frequency, current mode, PWM step-down converter.
The device integrates a main switch and a synchronous rectifier for high efficiency without an external Schottky diode. It is ideal for powering portable equipment that powered by a single cell Lithium-Ion (Li+) battery. The MP2112 can supply 1A of load current from a 2.5V to 6V input voltage. The output voltage can be regulated as low as 0.6V. The MP2112 can also run at 100% duty cycle for low dropout applications.
The MP2112 is available in a space-saving 6-pin QFN package.

How tho enter the service mode

In order to reach service menu, First Press “MENU” Then press the remote control code, which is “4725”.

In DTV mode, first press “MENU” and select “TV SETUP”.

Then, press “4725".

How to update the software [Firmware]

17MB35 Analog Part Software Update With Bootloader Procedure

The File Types Used By The Bootloader

All file types that used by the bootloader software are listed below:
1. The Binary File : It has “.bin” extension and it is the tv application. Its size is 1920Kb.
2. The Config Binary File : It has “.cin extension and it is the config of the tv application. Its size may be 64 Kb or a few times 64 Kb.
3. The Test Script File : It has “.txt” extension and it is the test script that is parsed and executed by the bootloader. It don’t have to be any times of 64 Kb.
4. The Test Binary File : It has “.tin” extension and it is used and written by the test groups. It is run to understand the problem part of the hardware.  Although a file that is used by the bootloader can be had any one of these extensions, its name has to be “VESTEL_S” and it has to be located in the root directory of the USB device.

Usage of The Bootloader
1. The starting to pass through: The chassis is only powered up.
2. The starting to download something: When chassis is powered up the menu key has to be pushed. Before the chassis is powered up and if any usb device is plugged to the USB port, the program is downloaded from USB firstly.
Any USB device is plugged to USB port , user must open hyperterminal in the pc and connect PC to chassis via Mstar debug tool and any one of scart,dsub9 or I2c connectors. Serial connection settings are listed below:

Bit per second: 115200
- Data bits: 8

- Parity: None
- Stop bits: 1
- Flow control: None.

In this case the bootloader sofware puts “C” character to uart. After repeating “C” characters are seen in the hyperterminal user can send any file to chassis by selecting Transfer > Send File menu item and choosing “1K Xmodem” from protocol section.

EEProm update
To Update EEProm content via uart scart,dsub9 or i2c with Mstar tool can used.
Serial connection settings are listed below:
- Bit per second: 9600
- Data bits: 8
- Parity: None
- Stop bits: 1
- Flow control: None.

Programming menu item is selected in the service menu and switch “HDCP Key Update Mode” from off to on.

Then you must see Xmodem menu in the hyperterminal.To download HDCP key press k or to download EEprom content press W.

If the repeated “C” characters are seen you can transfer file content via select Transfer > Send File and choose “Xmodem” protocol and click the “Send” button.

17MB30 HDCP key upload procedure.
1) Turn on TV set.
2) Open a COM connection using fallowing parameters and select ISP COM Port No
Baud Rate: 9600 bps
Data Bits: 8
Stop Bits: 1
Parity: None
Flow Control: None.

3) Enter service menu by pressing “4” “7” “2” 5” consecutively while main menu is open
4) Select “9. Programming”
5) Select “HDMI HDCP Update Mode” yes.
6) On Hyper Terminal Window press “k”
7) Click on send file under Transfer Tab.
8) Select Xmodem and choose the HDCP key to be uploaded.
9) Press send button
10) Restart TV set.

17MB35 Digital Software Update From SCART
Adjusting DTV Download Mode:
1. Power on the TV.
2. Exit the Stby Mode.
3. Enter the “TV Menu”.
4. Enter “4725” for jumping to “Service Settings”.
5. Select “8. Programming” step.
6. Change “6. DTV Download” to “On”.
7. Switch to the St-by mode.

Adjusting HyperTerminal:
1. Connect the “MB35 SCART Interface” to SCART1 (bottom SCART plug).
2. Also connect the “MB35 SCART Interface” to PC.
3. Open “HyperTerminal”.
4. Determine the “COM” settings listed and showed below.* Bit per second: 115200* Data bits: 8* Parity: None* Stop bits: 1* Flow control: None

6. Click “OK”.

Software Update Procedure
1. In the HyperTerminal Menu, click the “Connect” button.
2. Exit the Stby Mode.
3. The “Space” button on the keyboard must be pressed, when the following window can be seen.

4. Press the “2” button on the keyboard for choosing “2. Upgrade Application with Xmodem”.
5. Repeating “C” characters are seen in the “HyperTerminal” menu.

6. Click the “Send” button on the HyperTerminal
7. Select the “Filename xxxx_slot1.img” using “Browse”.
8. Choose the “1K Xmodem” from “Protocol” option.

Note: In the Software updating Procedure section, when the first “C” character is seen, the filename selection process must be finished before 10 seconds. If the process cannot be finished, the file sending operation will be cancelled. 

9. When sending the file the following window must be seen.

10. After the sending process the following HyperTerminal window must be seen.

11. For sending second program file, the Software Updating Procedure must be repeated from the step X. Select the “Filename xxxx_slot2.img” using “Browse”.
12. After sending the second program file, the Software Updating Procedure will be successful.
Note: After the File Sending Process,
1. Upgrade Application with FUM
2. Upgrade Application with Xmodem, options must be seen.

Checking the New Software
1. Turn off and on the TV.
2. Enter the “Setup” submenu in the “DTV Menu”.
3. Choose the “Configuration” option.
4. For controlling new software, check the “Receiver Upgrade” option.
17MB35 Digital Software Update From USB
Software upgrade is possible via USB disk by following the steps
1. Copy the bin file, including higher version than the software loaded in flash, into the USB flash memory root directory. This file should be named up.bin.
2. Insert the USB disk.
3. Digital module performs version and CRC check. If version and CRC check is successful, then a message prompt appears to notify user about new version. If the user confirms loading of new version, upgrade.bin file is written into flash unused slot.

4. Digital module disables the previous software in the flash and then a system reset is performed.
5. After the reset, digital module starts with new software.
Revert operation
With revert operation, it is possible to downgrade the software.
Revert operation is very similar to upgrade process. In the revert operation, file name should be f_up.bin. Also user confirmation is not asked.
1. Copy the bin file into the USB flash memory root directory. This file should be named force_upgrade.bin.
2. Insert the USB disk.
3. A lower version than the software in flash can be loaded with revert operation.
Digital module performs only CRC check. If CRC check is successful, then force_upgrade.bin file is written into flash unused slot.
4. Digital module disables the previous software in the flash.
5. A message prompt is displayed to notify user about end of revert process.
6. Power off/on is required to start digital module with the new software.
For controlling new software, check the “Receiver Upgrade” option.

Philips SureSigns VM -Patient Monitors – Error codes – causes of errors – Solution for errors

Philips SureSigns VM - (Medical Equipment)

Error Codes
When the monitor detects an error condition (depending on the type of error) an error message appears on the screen or an error code is written to the Error Log. 

Error codes can be either:
If an error occurs during monitoring, an audible alarm also sounds. 

Press the Audio Alarm Control button to end the audible alarm.

Warning Codes
A warning code is typically an indication that an event in the monitor bears attention or intervention and appears in the monitor’s messages panel.
Warning codes can be physiological or technical alarms. 

A physiological alarm indicates that the monitor has sensed an unsafe condition such as Desat or a measurement that has exceeded the alarm settings. 

A technical alarm indicates that the monitor has sensed a malfunction in the operation of the monitor like an uncalibrated CO2 module or NBP air leak.

Service Codes
A service code is an indication that the monitor has detected an error in operation and service might be required. 

A service code error is a hexadecimal number that indicates the nature of the error.

Error codes 

257

System Error

Battery charger power failure

Replace the main PCB.
261

System Error

Battery is overcharged

Run the monitor without AC power. 

If the problem persists, replace the battery. 

If the problem persists, replace the main PCB.
264 temp value
System Error

Battery over temperature Shut down and restart the monitor. 

If the problem persists, replace the battery.

If the problem persists, replace the main PCB.
769 (1)

ECG Equip Malfunc (1) ECG hardware internal calibration – gain error
Replace the front end assembly.
769 (2)

ECG Equip Malfunc (2)

 ECG hardware internal calibration – linearity error.
Replace the front end assembly.
769 (3)

ECG Equip Malfunc (3) ECG hardware internal calibration  offset error.
Replace the front end assembly.
770

FPGA FIFO Overrun

ECG software error on main board Shutdown and restart the monitor. 

If the problem persists, replace the main PCB.
771

ECG Error.

The front end will now reset itself.
No data from ECG Replace the front end assembly.

If the problem persists, replace the main PCB.

785 (1)

IBP Equip Malfunc - Initialization Failed (1)
IBP A/D did not configure correctly during power-up
Replace the front end assembly
785 (2)

IBP Equip Malfunc - Initialization Failed (2)
IBP A/D did not configure correctly during reset
Replace the front end assembly.
786

FPGA FIFO Overrun IBP software problem Shut down and restart the monitor. 

If the problem persists, replace the main PCB. 

787

IBP Error. The front end will now reset itself.
No data from IBP Replace the front end assembly

If the problem persists, replace the main PCB.
801

FPGA FIFO Overrun Continuous temperature software problem
Shut down and restart the monitor. 

If the problem persists, replace the main PCB.
802

Temp Error. The front end will now reset itself. No data from the continuous temperature equipment.
Replace the front end assembly. 

If the problem persists, replace the main PCB.
803 (1)

Temp Equip Malfunc Continuous temperature equipment malfunction Replace the front end assembly.
817

FPGA FIFO Overrun

NBP software problem Shut down and restart the monitor. If the problem persists, replace the main PCB.
818 (2)

NBP Equip Malfunc (2)

NBP power-on self test failed because the A/D converter is inoperative, or the pressure transducer offset is too large. 

Replace the NBP assembly. If the problem persists, replace the main PCB.
818 (15)

NBP Equip Malfunc (15) NBP abnormal, unrecoverable system errors with internal firmware.
Replace the NBP assembly. 

If the problem persists, replace the main PCB.

818 (25)

NBP Equip Malfunc (25) NBP hardware has malfunctioned because of no data
Replace the NBP assembly. 

If the problem persists, replace the main PCB.
819

NBP Equip Malfunc – Not Calibrated
NBP not calibrated Shut down and restart the monitor. 

If the problem persists, recalibrate the NBP unit.
833 (1)

SpO2 Equip Malfunc (1)

SpO2 ROM checksum error Replace the SpO2 board.
833 (2)

SpO2 Equip Malfunc (2)

SpO2 RAM test error Replace the SpO2 board.
833 (4)

SpO2 Equip Malfunc (4)

SpO2 analog signal path self test failed Replace the SpO2 board.
833 (6)

SpO2 Equip Malfunc (6)

SpO2 self test timeout Reseat the SpO2 board. If the problem persists, replace the SpO2 board. 
833 (8)

SpO2 Equip Malfunc (8)

SpO2 internal DSP communication error
Replace the SpO2 board.
833 (10)

SpO2 Equip Malfunc (10)

SpO2 host communication error Replace the front end assembly

If the problem persists, replace the main PCB.
833 (20)

SpO2 Equip Malfunc (20)

SpO2 hardware defect 

Replace the SpO2 board.
833 (40)

SpO2 Equip Malfunc SpO2 non-volatile memory corrupted Replace the SpO2 board.
834

SpO2 Sensor Malfunction

Malfunction of the SpO2 sensor or sensor cable
Check the SpO2 cable. If the problem persists, replace the SpO2 board.
835

FPGA FIFO Overrun SpO2 software problem Shut down and restart the monitor. 

If the problem persists, replace the main PCB.

836

SpO2 Communication Error

Replace the SpO2 board

If the problem persists, replace the front end assembly. 

If the problem persists, replace the main PCB.

837

SpO2 Error.

The front end will now reset itself.
No SpO2 data

Replace the SpO2 board

If the problem persists, replace the front end assembly.

If the problem persists, replace the main PCB.
849

FPGA FIFO Overrun CO2 software problem Shut down and restart the monitor.

If the problem persists, replace the main PCB..
850

CO2 Error. The front end will now reset itself.
No CO2 data Replace the CO2 module. 

If the problem persists, replace the main PCB.
851 (1)

CO2 Equip Malfunc (1)

CO2 calibration error Check/re-calibrate the CO2 module. If the problem persists, replace the CO2 module.
851 (2)

CO2 Equip Malfunc (2) CO2 equipment flow malfunction Check flow in line. 

If the problem persists, replace the CO2 module.
851 (3)

CO2 Equip Malfunc (3)

CO2 occlusion in gas input line Check flow in line. If the problem persists, replace the CO2 module.
851 (16)

CO2 Equip Malfunc (16) CO2 main board error Replace the CO2 module.
851 (17)

CO2 Equip Malfunc (17)

CO2 equipment malfunction Shut down and restart the monitor. 

If the problem persists, replace the CO2 module. 

BN44 00438A, BN44 00468A – SMPS schematic – Samsung LN32D403E2G, LN26D450 LED LCD TV

Samsung LE32D400E1W, Samsung LN26D450G1DXZA, Samsung LN32D450G1DXZA LED LCD TV power board circuit diagram: Used ICs - SEM3040, STRW6052S, SEM2106 

Attaching SMDs

 When soldering the SMD terminals, do not touch them directly with the soldering iron. The soldering should be done as quickly as possible; care must be taken to avoid damage to the terminals of the SMDs themselves.
* Keep the SMD's body in contact with the printed board when soldering.
* The soldering iron to be used (approx. 30 W ) should preferably be equipped with a thermal control (soldering temperature: 225 to 250 C).
* Soldering should not be done outside the solder land.
* Soldering flux (of rosin) may be used, but should not be acidic.
* After soldering, let the SMD cool down gradually at room temperature.
* The quantity of solder must be proportional to the size of the solder land. If the quantity is too great, the SMD might crack or the solder lands might be torn loose from the printed board.

Removal of SMDs
* Heat the solder (for 2-3 seconds) at each terminal of the chip. By means of litz wire and a slight horizontal force, small components can be removed with the soldering iron.
They can also be removed with a solder sucker

* While holding the SMD with a pair of tweezers, take it off gently using the soldering iron's heat applied to each terminal..

* Remove the excess solder on the solder lands by means of litz wire or a solder sucker..
While holding the SMD with a pair of tweezers, take it off gently using the soldering iron's heat applied to each terminal..
* Remove the excess solder on the solder lands by means of litz wire or a solder sucker

LN32D400, LN26D450 Power board [SMPS] and schematic

Click on the schematic to magnify

How to update the software, software versions, Function details – using Vestel 17MB82S main digital board - Sharp LED TV LC39LD145

Sharp LC-32LD145E (B), LC-32LD145K(B), LC-32LD145V(B), LC-39LD145E (B), LC-39LD145K(B), LC-39LD145V(B)

Fitted with  Vestel 17MB82S CHASSIS, LED LCD COLOUR TELEVISION - DVB-T / DVB-C (HDTV), PAL B/G, I / SECAM B/G, D/K, L/L’ SYSTEM COLOUR TELEVISION

DIFERENCES BETWEEN MODELS

The new main board has been change from 17MB82-2 to 17MB82S.
The new main board 17MB82S has the possibility to support DVB S/S2
Also new PSU board has been changed from 17IPS20 R5 to 17IPS20S R6 in 39 inches.
* The character is added at the end of the model name on the model label.
* The character is also added at the end of the model name on the carton label.

Software is different from original model.

LC32LD145E

LCD Maker: Vestel LG open cell Panel

LCD Part number: VES315WNDL-01

Power unit board: Vestel 7IPS19-5 V.1 (With LED Driver circuit)

LED Driver board: Vestel 17MB82-2

Software: LC-32LD145E_SW_V058a

LC32LD145E (B)

LCD Maker: Vestel LG open cell Panel

LCD Part number: VES315WNDL-01

Power unit board: 17IPS1917MB82S

LED Driver board: 17MB82S

Software: LC-32LD145E(B)_SW_V066a

LC39LD145E

LCD Maker: Vestel INNORUX open cell

LCD Part number: VES390UNDC-01

Power unit board: 17IPS20 R5 (With LED Driver circuit)

LED Driver board: 17MB82-2

Software: LC-39LD145E_SW_V058a

LC39LD145E (B)

LCD Maker: Vestel INNORUX open cell

LCD Part number: VES390UNDC-01

Power unit board: 17IPS20S R6 (With LED Driver circuit)

LED Driver board: 17MB82S

Software: LC-39LD145E(B)_SW_V066a

Using My button 1 (*) on the remote control
Press MY BUTTON 1 for fve seconds when on a desired source, channel or link, until the “MY BUTTON IS SET” message is displayed on the screen. This confirms that the selected MY BUTTON is now associated with the selected function.

Using My Button 2 (**) on the remote control
Press MY BUTTON 2 for fve seconds when on a desired source, channel or link, until the “MY BUTTON IS SET” message is displayed on the screen. This confirms that the selected MY BUTTON is now associated with the selected function.

17MB82S main board is driven by MediaTek MT5820. 

This IC is capable of handling Video and audio processing, Scaling-Display processing, 3D comb filter, OSD and text processing, LVDS/mini-LVDS transmitting, channel and MPEG2/4 decoding, integrated DVB-T/C demodulator and media center functionality.

TV supports PAL, SECAM, NTSC color standards and multiple transmission standards as B/G, D/K, and I’I including German and NICAM stereo. Also DVB T, DVB-C are supported internal demodulators of MediaTek IC.

Sound system output is supplying max. 2x8W ( less 10%THD at max output)

Supported peripherals are:

1 RF input VHF I, VHF III, UHF @ 75Ohm

1 Side AV (CVBS, R/L_Audio)

1 SCART socket

1 PC input

2 HDMI 1.3 input(2 HDMI input )

1 PDIF output

1 Headphone

1 Common interface

2 USB(1 USB input)

TUNER(MXL601)
MxL601 is a highly integrated low-power silicon tuner IC targeting all global analog and digital cable standards as well as digital terrestrial reception standards. Broadband input filtering and channel filtering have been completely integrated on-chip. This integration enables a very compact design requiring a small footprint, low bill-of-materials cost, and low power consumption. A signal at the 753 RF input is filtered and converted to a programmable IF output up to 44MHz. Automatic gain control, LO generation, and channel selectivity functions are completely integrated on the chip, which simplifies board level design. All functions of the IC can be controlled via I2C interface. MxL601 is available in a 4 x 4 mm2 24-pin QFN package.

AUDIO AMPLIFIER

The TAS5721 is a 15-W stereo or 2x10 W + 1x15 W2.1 device, efficient, digital audio-power amplifier for driving stereo bridge-tied speakers. One serial data input allows processing of up to two discrete audio channels and seamless integration to most digital audio processors and MPEG decoders. The device accepts a wide range of input data and data rates. Awfully programmable data path routes these channels to the internal speaker drivers. The TAS5721 is a slave-only device receiving all clocks from external sources. The TAS5721 operates with a PWM carrier between a 384-kHz switching rate and a 352-KHz switching rate, depending on the input sample rate. Oversampling combined with a fourth- order noise shaper provides a flat noise floor and excellent dynamic range from 20 Hz to 20 kHz.

Features

* Audio Input/Output

15Wx2 into 8

Supports Single Device 0.1, 2.0, 2.1 Modes

Wide PVDD Range, From 4.5 V to 26 V Performance

Efficient Class-D Operation Eliminates Need for Heatsinks

Requires Only 3.3 V and PVDD

One Serial Audio Input (Two Audio Channels)

I2C Address Selection via PIN (Chip Select)

Supports 8-kHz to 48-kHz Sample Rate (LJ/RJ/I2S)

External Headphone-Amplifier Shutdown Signal

Integrated CAP-Free Headphone Amplifier

Stereo Headphone (Stereo 2-V RMS Line Driver) Outputs

* Audio/PWM Processing

Independent Channel Volume Controls With The 24-dB to Mute

Separate Dynamic Range Control for Satellite and Sub Channels

21 Programmable Biquads for Speaker EQ

Programmable Coefficients for DRC Filters

DC Blocking Filters

Support for 3D Effects

* General Features

Serial Control Interface Operational Without MCLK

Factory-Trimmed Internal Oscillator for Automatic Rate Detection

Surface Mount, 48-Pin, 7-mm × 7-mm HTQFP Package

Thermal and Short-Circuit Protection.

POWER STAGE
The DC voltages required at various parts of the chassis and panel are provided by a main power supply unit. MB82 chassis can operate with PW05, IPS60, IPS70, IPS16, IPS17, IPS19, PW25, PW26, PW82-3, PW03, PW04, PW06, PW07 as main power supply and also with 12V adaptor.
Which power board can be used for board to board or cable connection?
Board to b oard (B TB) : PW05, I PS60, I PS70, I PS16, I PS17, I PS19 Power
Cable : PW25, PW26, PW82-3, PW03, PW04, PW06, PW07
The power supplies generate 24V, 12V, 5V, 3,3V and 12V, 5V, 3.3V stand b y mode DC voltages. Power stage which is on-chassis generates 5V, 3V3 stand by voltage and 12V, 8V, 5V, 3V3, 2.5V, 1,8V and 1,2V supplies for other different parts of the chassis. Chassis block diagram is indicated below.
The blocks on power block diagram is using dependent to main supply. For PW26 and PW27 just common blocks are enough for proper operation.
Short CCT Protection Circuit
Short circuit protection is necessary f or protecting chassis and main IC against dam ages when any Vcc supply shorts to ground. Protect pin should be logic high while normal operation. When there is a short circuit protect pin should be logic low. After any short detection, SW forces LEDs on LED card to blink.

MICROCONTROLLER – MediaTek

MT5820 (Main IC) (U1)
The MediaTek MT5820 family consists of a backend decoder and a TV controller and offers high integration for advanced applications. It combines a transport de-multiplexer, a high definition video decoder, an audio decoder, a dual-link LVDS transmitter, a mini-LVDS transmitter, an EPI transmitter and an NTSC/PAL/SECAM TV decoder with a 3D comb filter (NTSC/PAL). The MT5820 enables consumer electronics manufactures to build high quality, low cost and feature-rich DTV.

World-Leading audio/Video Technology: 

The MT5820 supports Full-HD MPEG1/2/4/h.264/DiviX/VC1/RM/AVS/VP6/VP8 (option) video decoder standards, and JPEG. The MT5820 also supports MediaTek MDDiTM de-interlace solution can reach very smooth picture quality for motions. A 3D comb filter added to the TV decoder recovers great details for still pictures. The special color processing technology provides natural, deep colors and true studio quality video. Also, the MT5820 family has built-in high resolution and high-quality audio codec.

Rich Features for High Value Products: 

The MT5820 family enables true single-chip experience. It integrates high-quality HDMI1.4a, high speed VGA ADC, LVDS, mini-LVDS, EPI, USB2.0 receiver, TCON (option),panel overdrive (option).

WW Common Platform Capability: Reserved transport stream input is for external demodulator for other countries or areas. TV maker can easily port the same UI to worldwide TV models. Excellent adjacent and co-channel rejection capability grants customers never miss any wonderful stream. Professional error-concealment provides stable, smooth and mosaic-free video quality.

Panel Supply Switch Circuit
This switch is used to open and close panel supply of TCON. It is controlled by port of main uncontrolled. Also with this circuit panel sequence could be adjusted correctly. 3 panel supplies are connected to this circuit. All of them are optional according to panels.

EN25QH16 16 Megabit Serial Flash Memory with 4Kbyte Uniform Sector

The EN25QH16 is a 16 Megabit (2,048 K-byte) Serial Flash memory, with enhanced write protection mechanisms. The EN25QH16 supports the standard Serial Peripheral Interface (SPI), and a high performance Dual/Quad output as well as Dual/Quad I/O using SPI pins:

Serial Clock, Chip Select, Serial DQ0(DI), DQ1(DO), DQ2(WP#) and DQ3(HOLD#). SPI clock frequencies of up to 80MHz are supported allowing equivalent clock rates of 160MHz (80MHz x 2) for Dual Output and 320MHz (80MHz x 4) for Quad Output when using the Dual/Quad I/O Fast Read instructions. The memory can be programmed 1 to 256 bytes at a time, using the Page Program instruction. The EN25QH16 is designed to allow either single Sector/Block at a time or full chip erase operation. The EN25QH16 can be configured to protect part of the memory as the software protected mode. The device can sustain a minimum of 100K program/erase cycles on each sector or block.

LM1117/LM 800mA Low-Dropout Linear Regulator

The LM1117 is a series of low dropout voltage regulators with a dropout of 1.2V at 800mA of load current. It has the same pin-out as National Semiconductor’s industry standard LM317.

The LM1117 is available in an adjustable version, which can set the output voltage from 1.25V to 13.8V with only two external resistors. In addition, it is also available in five fixed voltages, 1.8V, 2.5V, 2.85V, 3.3V, and 5V. The LM1117 offers current limiting and thermal shutdown. Its circuit includes a zener trimmed bandgap reference to assure output voltage accuracy to within ±1%. The LM1117 series is available in SOT-223, TO-220, and TO-252 D-PAK packages. A minimum of 10MF tantalum capacitor is required at the output to improve the transient response and stability.

SERVICE MENU SETTINGS

In order to reach service menu, First Press “MENU” then write "4725" by using remote control.

In first screen following items can be seen:

SOFTWARE UPDATE
In MB82 project there is only one software for service. From following steps software update procedure.
1. Copy “upgrade loader.pkg”software fle directly into foot of a flash memory (not in a folder)
2. Put flash memory to the TV when TV is powered off.
3. Power on the and press OK button on the remote control when the TV is opened.
4. If First Time Installation screen appears, it means software update is successful.