Saturday, September 30, 2017

Sony KDL 22L4000 LCD DIGITAL COLOR TELEVISION – CZ1R CHASSIS - How to enter the service mode – SMPS schematic

Sony KDL-22L4000 – RM YD025 - US
Sony KDL-22L4000 – RM YD025 - CANADA
Sony KDL-22L4000 – RM YD025 - MEXICO
Sony KDL-22L4000 RM-YD025 LATIN AMERICA
CLEANING THE LCD PANEL
CAUTION: When cleaning the TV, be sure to unplug the power cord to avoid any chance of electric shock.
Clean the cabinet of the TV with a dry soft cloth.
Wipe the LCD screen gently with a soft cloth.
 Stubborn stains may be removed with a cloth slightly moistened with a solution of mild soap and warm water.
 If using a chemically pretreated cloth, please follow the instruction provided on the package.
 Never use strong solvents such as a thinner, alcohol or benzine for cleaning.
 Periodic vacuuming of the ventilation openings is recommended to ensure to proper ventilation.
ACCESSING SERVICE (FACTORY) MODE
Use the remote commander to access Service (Factory) mode after completing a repair to the TV set.
1. TV must be in standby mode. (Power on) mode.
2. To display the service menu, quickly press the following buttons on the Remote Commander
REVIEWING SERVICE (FACTORY) MODE
All of the necessary adjustment are contained in the boards for these models, therefore the following information is for informational purposes.
RESETTING TO FACTORY DEFAULTS AFTER BOARD REPLACEMENT
Traditional Service Mode is not available in this chassis; however, after replacing a board you should reset all of the settings to the Factory Default from Service (Factory) Mode.
CAUTION: Resetting the TV to the Factory Defaults will over-write all customer settings including Parental Lock settiings.  
1. TV must be in Service (Factory) Mode.
2. Press the DN button to select Factory Reset.
3. Press the Enter button to select Yes.
4. When the Reset is complete, the text changes to No.
5. To exit “service mode”, press the Menu button.
Self diagnostic function
The units DO NOT contain a self-diagnostic function. If an error occurs, the TV will not stay on.  If a repair is required for these sets, the technician should bring both the A Board and the G Board to the customer location.
(Part numbers of boards are given below) 
VIEWING MODEL INFORMATION
Use the Setup settings menu to display information about the TV.
1. TV must be On.
2. Press the Menu button to display the User Menus.
3. Press [+] until the Settings icon is selected, and then press the OK button.
4. Press [+] until Product Information is selected, and then press the OK button.
5. To exit, press the Menu button.
Power board schematic
PWB - component and conductor side
Board part numbers (Sony) 
A board:  1-857-229-11
G board:  1-857-230-11
H board:  1-857-233-11
Click on the pictures to magnify

Friday, September 29, 2017

Vestel Satellite STB – SAT3600 - how to enter the service mode – How to update the software and more….

Applicable to Models: SAT 3600, SAT 3700, SAT 3701, SAT 3702, SAT 3703, SAT 3800, SAT 3801, SAT 3802
STi5518 functional modules
a. Central processor
The STi5518 Central Processing Unit is a ST20C2+ 32-bit processor core. It contains instruction processing logic, instruction and data pointers, and an operand register. It directly accesses the high-speed on-chip SRAM, which can store data or programs and uses the cache to reduce access time to off-chip program and data memory.The processor can access memory via the Programmable CPU Interface (often referred to as the EMI) or the Shared Memory Interface (SMI), which is shared with the video, audio, sub-picture and OSD decoders.
MPEG video decoder
This is a real-time video compression processor supporting the MPEG-1 and MPEG-2 standards at video rates up to 720 x 480 x 60 Hz and 720 x 576 x 50 Hz. Picture format conversion for display is performed by vertical and horizontal filters. User-defined bitmaps can be super-imposed on the display picture by using the on-screen display function. The display unit is part of the MPEG video decoder, it overlays the four display planes.
 The display planes are normally overlaid in the order illustrated, with the background color at the back and the sub-picture at the front (used as a cursor plane). The sub-picture plane can alternatively be positioned between the OSD and MPEG video planes where it can be used as a second on-screen display plane.
Audio decoder
The audio decoder accepts: Dolby Digital, MPEG-1 layers I, II and III, MPEG-2 layer II 6-channel, PCM, CDDA data formats; MPEG2 PES streams for MPEG-2, MPEG-1, Dolby Digital, MP3, and Linear PCM (LPCM). The audio decoder supports DTS® digital out (DVD DTS and CDDA DTS). SPDIF input data (IEC-60958 or IEC-61937 standards) is accepted if an external circuitry extracts the PCM clock from the stream. Skip frame, repeat blocks and soft mute frame features can be used to synchronize audio and video data. PTS audio extraction is also supported. The device outputs up to 6 channels of PCM data and appropriate clocks for external digital-to-analog converters. Programmable downmix enables 1,2,3 or 4 channel outputs. Data can be output in either I²S format or Sony format. The decoder can format output data according to IEC-60958 standard (for non compressed data: L/R channels, 16, 18, 20 and 24-bits) or IEC-61937 standard (for compressed data), for FS = 96 kHz, 48 kHz, 44.1 kHz or 32 kHz. Sampling frequencies of 96 kHz, 48 kHz, 44.1 kHz, 32 kHz and half sampling frequencies are supported.
A down sampling filter (96 kHz/48 kHz) is available. The decoder supports dual mode for MPEG and Dolby Digital. It includes a Dolby surround compatible downmix and a ProLogic decoder. A pink noise generator enables the accurate positioning of speakers for optimal surround sound setup. PCM beep tone is a special mode used for Set Top Box. It generates a triangular signal of variable frequency and amplitude on the left and right channels. In global mute mode, the decoder decodes the incoming bitstream normally but the PCM and SPDIF outputs are soft muted. This mode is used to prepare a period of decoding mode, to synchronize audio and video data without hearing the audio. Slow-forward and fast-forward trick modes are available for compressed and non-compressed data. The control interface of the decoder is activated via memory mapped registers in the ST20 address space.
IR transmitter/receiver
The STi5518 provides a pulse-position modulated signal for automatic VCR programming by the set-top box. The signal is output to the IR blast pin and an accessory jack pin, simultaneously. The pulse frequency, number of pulses (envelope length) and the total cycle time is controlled by registers.

Modem analog front-end interface
The Modem Analog Front-end interface is used to transfer transmit and receive DAC and ADC samples between the memory and an external modem analog front-end (MAFE), using a synchronous serial protocol. DMA is used to transfer the sample data between memory buffers and the MAFE interface module, with separate transmit and receive buffers and double buffering of the buffer pointers. FIFOs are used to take into account the access latency to memory, in a worst case system and to allow the use of bursts for memory bandwidth efficiency improvement. The V22 bis standard is supported.
Memory subsystem
On-chip
The on-chip memory includes 2Kbytes of instruction cache, 2Kbytes of data cache and 4Kbytes of SRAM that can be optionally configured as data cache. The subsystem provides 240M/bytes of internal bandwidth, supporting pipelined 2- cycle internal memory access. The instruction and data caches are direct-mapped, with a write-back system for the data-cache. The caches support burst accesses to the external memories for refill and write-back. Burst access increases the performance of pagemode DRAM memories.
Off-chip
There are two off-chip memory interfaces:
• The external memory interface (EMI) accessed by the ST20 is used for the transfer of data and programs between the STi5518 and external peripherals, flash and additional SDRAM and DRAM.
• Shared memory interface (SMI) controls the movement of data between the STi5518 and 16, 32 or 64 Mbits of SDRAM. This external SDRAM stores the display data generated by the MPEG decoder and CPU and the C2+ code data.  The EMI uses minimal external support logic to support memory subsystems, and accesses a 32 Mbytes of physical address space (greater if SDRAM or DRAM is used) in four general purpose memory banks of 8 or 16 bits wide, 21 or 22 address lines, and byte select. For applications requiring extra memory, the EMI supports this extra memory with zero external support logic, even for 16-bit SDRAM devices. The EMI can be configured for a wide variety of timing and decode functions by the configuration registers. The timing of each of the four memory banks can be set separately, with different device types being placed in each bank with no need for external hardware.
 Serial communication
Asynchronous serial controllers
The Asynchronous Serial Controller (ASC), also referred to as the UART interface, provides serial communication between the STi5518 and other micro-controllers, microprocessors or external peripherals. The STi5518 has four ASCs, two of which are generally used by the Smart card controllers.  Eight or nine bit data transfer, parity generation, and the number of stop bits are programmable. Parity, framing, and overrun error detection increase data transfer reliability. Transmission and reception of data can be double-buffered, or 16-deep FIFOs can be used. A mechanism to distinguish the address from the data bytes is included for multiprocessor communication. Testing is supported by a loop-back option. A 16-bit baud-rate generator provides the ASC with a separate serial clock signal. Two ASCs support full-duplex and 2 half-duplex asynchronous communication, where both the transmitter and the receiver use the same data frame format and the same baud rate. Each ASC can be set to operate in Smartcard mode for use when interfacing to a Smartcard.
Synchronous serial controller
Two Synchronous Serial Controllers (SSC) provide high-speed interfaces to a wide variety of serial memories, remote control receivers and other micro controllers. The SSCs support all of the features of the Serial Peripheral Interface bus (SPI) and the I2C bus. The SSCs can be programmed to interface to other serial bus standards. The SSCs share pins with the parallel input/output (PIO) ports, and support half-duplex synchronous communication.
Front-end interface
The STi5518 can be connected to a front-end through the following interfaces:
• I2S interface;
• multi-format serial interface;
• multi-format parallel interface;
• ATAPI interface (for Hard Disk Drives and DVD-ROMs)

On-chip PLL
The on-chip PLL accepts 27 MHz input and generates all the internal high-frequency clocks needed for the CPU, MPEG and audio subsystems.
Diagnostic controller (DCU)
The ST20 Diagnostic Controller Unit (DCU) is used to boot the CPU and to control and monitor the chip systems via the standard IEEE 1194.1 Test Access Port. The DCU includes on-chip hardware with ICE (In Circuit Emulation) and LSA (Logic State Analyzer) features to facilitate verification and debugging of software running on the on-chip CPU in real time. It is an independent hardware module with a private link from the host to support real-time diagnostics.
Interrupt subsystem
The interrupt system allows an on-chip module or external interrupt pin to interrupt an active process so that an interrupt handling process can be run. An interrupt can be signalled by one of the following: a signal on an external interrupt pin, a signal from an internal peripheral or subsystem, software asserting an interrupt in the pending register. Interrupts are implemented by an on-chip interrupt controller and an on-chip interrupt-level controller. The interrupt controller supports eight prioritized interrupts as inputs and manages the pending interrupts. This allows the nesting of pre-emptive interrupts for real-time system design. Each interrupt can be programmed to be at a
lower or higher priority than the high priority process queue.
PAL/NTSC/SECAM encoder
The integrated digital encoder converts a multiplexed 4:2:2 or 4:4:4 YCbCr stream into a standard analog base-band PAL/NTSC or SECAM signal and into RGB, YUV, Yc and CVBS components. The encoder can perform closed caption, CGMS encoding, and allows MacrovisionTM 7.01/6.1 copy protection. The DENC is able to encode Teletext according to the “CCIR/ITU-R Broadcast Teletext System B” specification, also known as “World System Teletext”.  In DVB applications, Teletext data is embedded within DVB streams as MPEG data packets. It is the responsibility of the software to handle incoming data packets and in particular to store Teletext packets in a buffer, which then passes them to the DENC on request.

Smart-card interfaces
Two Smartcard interfaces support Smartcards compliant with ISO7816-3. Each interface is has a UART (ASC), a dedicated programmable clock generator, and eight bits of parallel IO port.
PWM and counter module
The PWM and counter module provides three PWM encoder outputs, three PWM decoder (capture) inputs and four programmable timers. Each capture input can be programmed to detect rising edge, falling edge, both edges or neither edge (disabled). These facilities are clocked by two independent clocks, one for PWM outputs and one for capture inputs/timers. The PWM counter is 8-bit, with 8-bit registers to set the output-high time. The  capture/compare counter and the compare and capture registers are 32-bit. The module generates a single interrupt signal.
Parallel I/O module
44 bits of parallel I/O are configured in 6 ports, and each bit is programmable as output or input. The output can be configured as a totem-pole or open-drain driver. The input compare logic can generate an interrupt on any change of any input bit. Many parallel IO have alternate functions and can be connected to an internal peripheral signal such as a UART or SSC
POWER BOARD (16PW07 E3)
The TOPSwitch concept is used for power supply. TOP 233Y (IC1) is designed to work until 50 Watts in family of TOPSwitch_FX with 5 pins. The receiver works between 85 and 265 VAC mains voltage by using TOP 233Y in SMPS (Switch Mode Power Supply). The secondary voltage regulation is adjusted by changing the duty cycle of drain signal according to the feedback voltage, which is got from the secondary side of transformer. The feedback voltages are 3.3V and 5V. This is connected to the comparator pin of TOP 233Y (IC1-pin1) via IC12 (Optocoupler). The comparator pin also protects the box against short circuits and overload. The Vcc voltage of IC1 is between 2V –3V at pin2. The TOP 233Y works at a fixed frequency. This frequency is fixed by RC oscillator at pin1. The pin3 and pin 4 are ground and the pin5 is drain of MOSFET, which is inside the TOP 233Y.
The switching of LNB supply voltage is done here. 18V and 22V outputs of transformer switched by Q1, Q2 and H/V output of STV299 (TU400). By this way overheating and unnecessary power consumption of Q5 (BD235) that regulates the LNB supply is prevented.
22kHz tone which is needed for DiSEqC signals, is generated at pin15 (Alps-TU400) or pin12 (Sharp-TU400) of STV0299 in tuner 22KHz is added to LNB supply here via LM358N (IC4).
MAIN BOARD (16MB07 E3 )
The main board contains two parts: Front-end and Back-end. The digital signal is demodulated in Front-end and then decoded in Back-end. Analog signals are processed in different part.
The tuner (TU400 Alps or Sharp) is capable of getting both digital broadcasts. After the modulated signals (I, Q outputs) receive from tuner, they go to STV0299 for demodulation process in tuner. (TU400) In this IC, QPSK (Quadrated Phase Shift Keying) demodulation and Forward Error Correction (FEC) are done which is necessary to demodulate DVB-S transmission. TS (transport stream): The multiplexed digital stream which includes video, audio and data information related to more than one channel (can be only one channel for SCPC signals) and DVB tables. TS signals which are generated after demodulation, reach to Sti5518 (IC100) via 8 bits data bus. However, Byte Clock (TSIn_BCLK), Packet Clock (TSIn _STROUT) signals are also sent to ST5518 (IC100) for demultiplexing process of TS. STV0299 is controlled by I2C. In addition, 22kHz tone which is needed for DiSEqC signals, is generated at pin12 (Alps) or pin10 (Sharp) of STV0299 in tuner.
LNB supply voltage (13/18V) is regulated via power board. Switching of supply voltage between LOOP_IN and LNB_SUPPLY is done by Q402 transistors. The voltage on R403 is proportional with the current of LNB supply. Overload on LNB supply increases the voltage on R403, which results switching of Q400, Q401. By this way input LNB_OVERLOAD signal port of Sti 5518 (IC100) has the knowledge of LNB overload and then LNB supply is cut off for protection of box via Sti 5518 port (P25).
At the backend part, there is a 32-bit CPU ST20 (in Sti 5518 embedded) that controls all processes. Demultiplexer of the CPU provides the transmission of the desired channel’s information from TS (Transport Stream) to MPEG Decoder section. The program that runs on Sti5518 is in Flash memories (IC301). 8Mbits SDRAM (IC300) is used for data memory of this program.
ST20 uses 32- bit data and 22- bit address buses for access to flash, DRAM and MPEG decoder. It uses RAS, CAS etc. (read, write, enable) signals to activate related IC while accessing them.
The clock which is needed by Sti 5518 (IC100), is generated at power on mode by 27MHz crystal (X100) and IC102 (74HCU04). The output of PWM outputs of Sti 5518 (IC100), is filtered to have a DC level via R129 and C118. At the output of ICS3, the 27MHz clock can be adjusted according to capacity of pins of 27MHz crystal to ground. This capacity is related with DC value on D100 and D101 (BB133) at pins of crystal. This operation maintains synchronization between audio-video that are coming from MPEG transport stream and PCR clock.
Sti 5518 (IC100) can communicate any micro controller via RS232 by using IC101 (MAX232- RS232 level converter). The RS232 output of receiver is used for debug any problem using Windows Hyper Terminal program.
MPEG decoder in Sti 5518 (IC100), is responsible for decoding of MPEG video and audio signals. The video, which is compressed using MPEG2 and audio, which is compressed using MPEG1 Layer 1-2, are processed here. After decoding, CCIR 601 formatted 8-bit video and PCM formatted audio, are generated by mpeg decoder.  If digital broadcast has a teletext information, Sti 5518 (IC100) inserts teletext info into VBI (vertical blanking interval) which can be watched on TV. Digital audio that is PCM formatted on Sti 5518’ s output, is processed by CS4335 (IC500) and amplified by LM833 (IC501) and then switched through IC200 (M74HC4052).
In digital mode, RGB signals are only delivered to TV scart. CVBS output is distributed through IC201 (M74HC4052) to TV, AUX/VCR and VCR scarts. When VCR becomes active, audio and video signals are driven to TV and VCR scarts, which is activated by pin8 of VCR scart.
The program information is stored in 128Kbits EEPROM (24C128 – IC302) via I2C.
How to enter the service mode - SERVICE MENU INTERFACE
There is a service menu for service person which is accessed by entering “MAIN MENU” then pressing “9”, “2”, “9”, “5”, “2”, “6” keys on the remote control. You will see service menu on the screen. This menu consists of fifteen active lines.
RF Modulator System
You can control RF modulator system at this line. RF modulator system option can be selected as Pal G or Pal I or Pal K type in software side by pressing left or right cursor key on the remote control.
RF Modulator Type
You can control RF modulator type at this line. RF modulator option can be selected as Sharp or Samsung or LG type in software side by pressing left or right cursor key on the remote
control.
Tuner Type
You can control Tuner type in software version at this line
Scarts
You can control number of scarts in software version at this line Reboot : You press OK button on the remote commander. Apparatus is restart.
Clear Database
You press OK button on the remote commander. These settings reinitialize whole EEPROM and store all programs erase.
L/R: DBCopy – OK: Upload PGM
The object of this manual is to give necessary information and details to the user to UPLOAD the program table to the receiver through RS232.
The list of the necessary equipment is as follows:
• Receiver and TV
• PC with “Hyper Terminal” function,
• RS232 serial communication cable (male to female modem cable).
Steps to be followed by the user are given below
1. Connect the serial communication cable between the RS232 outport of the receiver and the serial communication port (COM1 or COM2) of the PC.
2. Make sure that the PC is on and the receiver is in Power on mode.
3. Run “Hyper Terminal” program of the PC from Start / Programs / Accessories / Communications / Hyper Terminal menu.
4. For a new connection, run Hypertrm.exe file.
5. Give a name and choose an icon for the connection. (You do not need to make a new connection every time. You can use this name for the future connections.)
6. Choose communication port in the new coming window (COM1 or COM2) whichever you have used in Step 1.
7. Port settings should be as follows:
Bits per second : 38400
Data Bits : 8
Parity : None
Stop bits : 1
Flow control : None
8. Now Hyper Terminal connection is established.
9. Go to “L/R: DBCopy – OK: Upload PGM” line on the service menu and press “LEFT” or “RIGHT” keys of remote control (for copying database to the receiver). Please wait until the print statements on the Hyper Terminal screen end.
10. From “Transfer” menu, choose “Receive File”.
11. Choose 1K Xmodem as protocol type.
12. “L/R: DBCopy – OK: Upload PGM” line on the service menu and press “OK” key of remote control. Then Receive on of Hyper Terminal window and enter a file name like (Program_table.pit) and press “OK” button. then You will see the progress on the PC screen. Besides, on TV screen the receiver will count the downloaded packets.
13. Wait for the transfer to be completed. Then, disconnect and exit from Hyper Terminal window.
Download PGM
The object of this manual is to give necessary information and details to the user to upgrade the program table of the receiver through RS232.The list of the necessary equipment is as follows:
• Receiver and TV
• PC with “Hyper Terminal” function,
• RS232 serial communication cable (male to female modem cable).
Steps to be followed by the user are given below:
1. Connect the serial communication cable between the RS232 outport of the receiver and the serial communication port (COM1 or COM2) of the PC.
2. Make sure that the PC is on and the receiver is in Power on mode.
3. Go to “ Clear Database ” line and press “OK” key and then wait for twenty seconds (old program table is deleted).
4. Run “Hyper Terminal” program of the PC from Start / Programs / Accessories / Communications / Hyper Terminal menu.
5. For a new connection, run Hypertrm.exe file.
6. Give a name and choose an icon for the connection. (You do not need to make a new connection every time. You can use this name for the future connections.)
7. Choose communication port in the new coming window (COM1 or COM2) whichever you have used in Step 1.
8. Port settings should be as follows:
Bits per second : 38400
Data Bits : 8
Parity : None
Stop bits : 1
Flow control : None
9. Now Hyper Terminal connection is established. From “Transfer” menu, choose “Send File”.
10. Enter file name to be sent (program table).
11. Choose 1K Xmodem as protocol type.
12. Press Send button of Hyper Terminal window and then Go to “Download PGM” line on the service menu and press “OK” key of remote control. You will see the progress on the PC screen. Besides, on TV screen the receiver will count the downloaded packets.
13. Wait for the transfer to be completed. Then, disconnect and exit from Hyper Terminal window.
Reset receiver by re-plugging in the mains cord of the set to the mains supply. Receiver will tune to new program table.
You press “OK” button remote commander to enter Remote/Front panel test then you can see name of the button on the front panel or remote commander you pressed. By pressing Menu button on the remote commander two times, you can exit.
7-Segment Display Test
You press the OK key on the remote commander to start 7-segment display test. You can see the test pattern on the display.
System Diagnostic
You press the OK key on the remote commander and show your IC information in apparatus main hardware
Development Team
You press the OK key on the remote commander and Show your development team list Upload Default Sat_Xpdrs :
This line can explain information under line
Download Default Sat_Xpdrs :
The object of this manual is to give necessary information and details to the user to transmission the program table and preset table to the receiver through RS232.
The list of the necessary equipment is as follows:
• Receiver (master that sends the program table), TV
• Receiver (slave that receives the program table), TV
• RS232 serial communication cable (male to male modem cable).
Steps to be followed by the user are given below
1. Connect the serial communication cable between the RS232 outport of the receiver to other receiver.
2. Make sure that both receivers are in Power on mode.
3. Open the “main menu” and press “929526” keys sequentially for both of the receivers, you will see service menu on the TV screens.
4. Go to “L/R: DBCopy – OK: Upload PGM” line on the service menu for master receiver and press “LEFT” or “RIGHT” keys of remote control (for copying database to the receiver).
5. Go to “Download PGM” line on the service menu for slave receiver
6. “L/R: DBCopy – OK: Upload PGM” line on the service menu and press “OK” key of remote control for master device. “Download PGM” line on the service menu and press “OK” key of remote control for slave device. Besides, on TV screen the receiver will count the downloaded packets.
7. Wait for the transfer to be completed the program table for both receivers.
8. Power off both receivers then power on them.
9. Open the “main menu” and press “929526” keys sequentially for both of the receivers, you will see service menu on the TV screens.
10. Go to “Upload default Sat_Xpdrs” line on the service menu for master receiver.
11. Go to “Download default Sat_Xpdrs” line on the service menu for slave receiver
12. “Upload default Sat_Xpdrs” line on the service menu and press “OK” key of remote control for master device. “Download default Sat_Xpdrs” line on the service menu and press “OK” key of remote control for slave device. Besides, on TV screen the receiver will count the downloaded packets.
13. Wait for the transfer to be completed the preset table for both receivers.
Rs232 Test
You connect the jumper to Rx output and Tx output. You press the “OK” key on the remote commander then you can see “tESt” at the front display. You release the “OK” key on the remote commander then you can see “Err” at the front display.
You can return to main menu by pressing “Menu” keys on the remote control.
SOFTWARE UPGRADE THROUGH RS232 FOR HAVÄ°NG 7-SEGMENT DISPLAY MODELS
The object of this manual is to give necessary information and details to the user to upgrade the software of the receiver through RS232.
The list of the necessary equipment is as follows:
Receiver and TV
PC with “Hyper Terminal” function,
RS232 serial communication cable (male to female modem cable).
Steps to be followed by the user are given below
1. Connect the serial communication cable between the RS232 out port of the receiver and the serial communication port (COM1 or COM2) of the PC.
2. Make sure that the PC is on and the receiver is in the Standby mode.
3. Run “Hyper Terminal” program of the PC from Start / Programs / Accessories / Communications / Hyper Terminal menu.
4. For a new connection, run Hypertrm.exe file.
5. Give a name and choose an icon for the connection. (You do not need to make a new connection every time. You can use this name for the future connections.)
6. Choose communication port in the new coming window (COM1 or COM2) whichever you have used in Step 1.
7. Port settings should be as follows:
Bits per second : 115200
Data Bits : 8
Parity : None
Stop bits : 1
Flow control : None
8. Now Hyper Terminal connection is established. From “Transfer” menu, choose “Send File”.
9. Enter file name to be sent.
10. Choose Xmodem1K as protocol type.
11. Get the receiver out of standby mode using front panel keys just after pressing Send button at the hyper terminal window. You will see the progress on the PC screen. Besides, front panel display of the receiver will count the downloaded packets.
12. Wait for the transfer to be completed. Then, disconnect and exit from Hyper Terminal window.
Receiver will automatically start to operate.
SOFTWARE UPGRADE THROUGH RS232 FOR HAVING LED MODELS
The object of this manual is to give necessary information and details to the user to upgrade the software of the receiver through RS232.
The list of the necessary equipment is as follows
Receiver and TV
PC with “Hyper Terminal” function,
RS232 serial communication cable (male to female modem cable).
Steps to be followed by the user are given below:
1. Connect the serial communication cable between the RS232 out port of the receiver and the serial communication port (COM1 or COM2) of the PC.
2. Make sure that the PC is on.
3. Run “Hyper Terminal” program of the PC from Start / Programs / Accessories / Communications / Hyper Terminal menu.
4. For a new connection, run Hypertrm.exe file.
5. Give a name and choose an icon for the connection. (You do not need to make a new connection every time. You can use this name for the future connections.)
6. Choose communication port in the new coming window (COM1 or COM2) whichever you have used in Step 1.
7. Port settings should be as follows:
Bits per second : 115200
Data Bits : 8
Parity : None
Stop bits : 1
Flow control : None
8. Now Hyper Terminal connection is established. From “Transfer” menu, choose “Send File”.
9. Enter file name to be sent.
10. Choose Xmodem1K as protocol type.
11. Plug in the mains cord of the set to the mains supply just after pressing Send button at the hyper terminal window. You will see the progress on the PC screen. Besides, front panel display of the receiver will count the downloaded packets.
12. Wait for the transfer to be completed. Then, disconnect and exit from Hyper Terminal window.
Receiver will automatically start on standby mode. After software initialization (it takes 5 second) finished you can turn on your digital set-top box by pressing one of the standby button, up/down or numeric buttons on remote control or up/down/standby button on the front panel.

Sunday, September 24, 2017

LG OLED TV How to check the SMPS (power supply board) of 2015 EF Series

LG55EF9500, LG65EF9500 - OLED TV power supply board (SMPS) testing procedure
When servicing an OLED TV and you need to Test the Power Supply, due to the symptoms the TV Won’t Come On or TV Intermittent Powers Off, before beginning the Power Supply Testing READ THE BELOW FIRST.
Read First Before Beginning the Power Supply Testing Procedure
Check the Front Power Indicator:
Take note of the front Power LED. If it begins to “Blink” (about once a second) continually for 30 seconds and the TV makes no attempt to turn on. 
It means that the Main board is “Latched” and no functions work.
If this happens, the Main board will not function again normally until it is unlatched even if the Main board is placed in another identical OLED model.
To Unlatch the Main Board:
Press the “Power Only” button using the Service Remote. 
This will place the TV into P-Only mode. 
P-Only = TV comes on in Full White Raster. 
A P-Only black box with text appears in the upper left hand side of the screen. 
P-Only mode will also bypass the “Burn Det” circuit _ , y which will allow the TV to turn on normally.
If the TV Comes on Normally in P-Only Mode:
Press Exit on any remote and the screen is not full white raster. 
Press the “In-Start” button (at the service remote control for LG), and enter the Service Menu. 
NB: You should have a special remote control "Service remote control" to enter the service mode of most models of LG TVs. There is no other ways to enter the service mode of these sets. You have to press the "Instart" button on the service remote control to enter the service mode. 
Scroll down to “Power_Off_History” and look at the events that shut off the TV. If you find three consecutive “INV_ERROR” this indicates activation of the Burn_Det circuit which is what “Latched” the Main board. If this is the case, look f S f “ or the Service Bulletin for this model; “Improved Auto Power Off / No Power issue”. This bulletin requires you to update the Software via USB only.
If the TV Still Won’t Come On:
In this case follow the Power Supply Testing, check the Main board. If both are OK, replace the Panel.
If the OLED TV Shuts Off Intermittently:
With the OLED turned on, press the “In-Start” button at the Service remote control, to enter the Service Menu. 
Scroll down to “Power_Off_History” and look at the events that shut the TV off. 
If you find PWR_OFF_by_20V_DET or PWR_OFF_by_INV_ERROR”, look for the Service Bulletin for this model; “Improved Auto Power Off / No Power issue”. This bulletin requires you to update the Software via USB only.
If the TV Still Continues to Intermittently Shut Off:
In this case follow the Power Supply Testing, check the Main board. If both are OK, replace the Panel.
LG (OLED EF Series) Power Supply Board 12V/24V to Main Voltage Check
AC Should not be applied at any time while adding jumpers or While unplugging connectors, damage to the circuit Board may occur.
When AC is applied, the SMPS “MUST” be producing STBY 3.5V (3.52V) on pins 5 and 7, 8 of P201.
If 3 5V Standby is not being generated, the SMPS is defective and may need to be replaced. Make sure AC is arriving at the connector SK100 and +3.5V_ST is not loaded down by the Main Board or the Joy Stick/IR Board.
Remove connector on Main board. If STBY is still missing, SMPS is defective.
II) Unplug P2399 on the Main Board to make insertion of the Jumpers easier Use P2399 side to insert jumpers.
TESTING THE POWER SUPPLY TURN-ON CIRCUIT.
Add a jumper (A) between (3 5V STBY) pin 5 and (PWR ON) Pin 1
Apply AC, this will turn on the SMPS. Relay click will be heard
Check that the 24V and 12V power supplies to the Main board are turned on,
To Main Board Power:
 P201 (11.96V pins 11-15)
 P201 (23 70V pins 19 22)
No 12V or 24V to T-CON at this time.
Remove AC power
Pin 1 is Bottom on SMPS
Pin 1 is Top on Main
To Test the Power Supply’s T CON 12V line
Continue if Test 1 was OK.
Leave original jumper (A) in place.
AC Power is removed at this time.
The T-CON should be connected, SMPS P202 and P203 to T-CON
Add another jumper (B) between (STBY_3.5V) pin 8 and (12V_ON) Pin 18.
Simulating PWR_ON and 12V_ON commands.
Apply AC Power.
Check 12V (11.87V) on pins 7-12 on P202
T-CON 12V Normal:
a) If normal, the SMPS is OK, T-CON 12V load test OK
T-CON 12V Abnormal:
a) Recheck all connections.
b) Confirm the 12V_ON line pulling up to at least 3V.
c) Check SMPS P202 pins 7-12 for an excessive load, normal diode check  should be 0.48V P202 connected “0.50V” P203 disconnected.
Check CN11 pins 8-12 on the T-CON for an excessive load.
Diode check should be “1.04V”. (CN11 unplugged from the SMPS, the panel can be connected or disconnected).
Note: With Red lead on Chassis ground, reading is 0.41V.
If you are concerned that you may accidently connect the jumpers in the incorrect locations use a 100 ohm 1/8W resistor instead.
Leave jumpers (A) and (B) in place. AC Power is removed at this time.
The T-CON should be connected, SMPS P202 and P203 to T-CON
T-CON 24V POWER SECTION TEST:
Add another jumper between (STBY_3.5V) pin 5 and (DRV_ON) Pin 2.
Simulating PWR_ON, DRV_ON and 12V_ON command.
Apply AC Power.
Check 24V on pins 8-14 on P203
T-CON 24V Normal:
a) If normal (24.16V), the SMPS is OK, T-CON load test OK
T-CON 24V Abnormal
a) Recheck all connections.
b) Confirm the DRV_ON line pulling up to at least 3V.
c) Check SMPS P203 pins 8-14 for an excessive load, diode check should be “0.48V” P203 connected or disconnected.
Check CN5 pins 8-14 on the T-CON for an excessive load.
(CN5 unplugged from the SMPS, Panel connected). Diode check should be “OL” (Blk lead on Gnd) 0.38V (Red lead on Gnd).
(CN5 unplugged from the SMPS, Panel disconnected). Diode check should be “OL” (Blk lead on Gnd) 0.51V (Red lead on Gnd).
To Test the Power Supply’s T-CON 24V line using a light bulb test jig
In this case, the Power Supply needs to be tested to see if it can supply the T-CON 24V and 12V when loaded.
TEST 4: (2015 EF Series OLED) Power Supply Board T-CON 12V and 24V Power
TEST 4: 24V T-CON POWER LOAD CHECK:
 Leave all Jumpers in place on P2399 to P201 of the Power Supply and disconnect CN5 on the T-CON board.
 Make a 24V load test jig by using a standard 1157 automobile light bulb, (dual element). Solder two wires from the buttons on the bottom of the bulb. Do not solder any wire to the actual ground of the bulb.
Attach one end of the Jig to the 24V line from P203 pins 8-15 from the SMPS.
Attach the other wire from the Jig to Chassis Ground.
To make insertion easy, cut the sharp end of a safety pin off and solder it to each end of the wires coming from the light bulb Jig.
Push one needle end into one of the pins 8-14 of CN5.
Push the other needle end of the wire into any pin 1-7 of CN5.
Apply AC to the power supply, the light bulb should light and remain lit.
Measure the 24V line to confirm it’s correct. The bulb should be bright.
Let the SMPS run for several minutes to confirm its operating correctly.
(Do not let wires or light bulb touch any metal parts).
Note: You can also use two sing ( le element automotive bulbs (each 6W) tied in series.
a: If the Light Bulb remains lit, the panel is defective because the T-CON and/or the panel is providing too much of a load causing the power supply to shut off.
b: If the SMPS shuts off, Replace the Power Supply.
TEST 5: 12V T-CON POWER LOAD CHECK:
Note: You can test the 12V to the T-CON line using the same procedure, but you only need one bulb. Use same bulb, but solder one lead to a button and the other to the case.

Thursday, September 21, 2017

LG 26LC7R, LG26LC7R-MD 26 Inch LCD TVs – How to update the firmware – EDID/DDC DATA download - LP78B chassis

PCB assembly adjustment items
1) Download the VCTP main software (IC500,VCT_Pro)
2) Channel memory (IC501,EEPROM)
3) Color carrier Adjustment
SET assembly adjustment items
1) DDC Data input.
2) Adjustment of White Balance.
3) Factoring Option Data input
PCB assembly adjustment method (Using VCTP Download program)
Download program installation
(1) Extract a Zip file
(2) Visual I2C & LPT Driver Installation
Install the LPT Driver
Install the Visual I2C
Click on the pictures to magnify
LPT Port Driver (LptDrv) Setups : Program Files > Micronas > Visual I2C > Port_Driver
*Use for Windows 95/98 : Setup_LptDrv_v0104_9x.exe
*Use for Windows 2000/XP : Setup_LptDrv_v0202_XP_2000.exe
*Use for Windows NT : Setup_LptDrv_v0104_NT.exe
(3) Verification (Start > Programs > Micronas >Visual I2C or LptDrv)
(4) LPT delay setting (File > Preference > LPT preferences)
 (5) Exchange the bootloader.bat file.
=> Select the "Bootloader.bat" file(install > VCTP_download > Bootloader)
=> Push "OK"
=> Finish the program, after saving the file "download_cs.vi2c"  (if you click [X] , the massage appears automatically)
S/W program download
(1) Download method 1 (PCB Ass’y)
Connect the download jig to D-sub jack.
2) Execute ‘Download.vi2c’ program in PC, then a main window will be opened.
3) Double click the blue box and confirm "Bootloader Version"
4) Click the "Erase Flash" button.
5) Double click the download file low, then "edit" window will be opened.
6) Click the choice button in the “edit window”, then “file choice window” will be opened.
7) Choose the Hex file in folder and execute downloading with click " open" button.
8) Click OK button at the "edit window".
9) Under downloading process
10) If download is failed, for example "No acknowledge from slave". Execute download again from(1).
(2) Download method 2 (AV Plate Ass’y)
Push S/W ‘ON’(connect SCL to GND using switch at Jig) and connect the download jig to D-sub jack.
2) Supply the power (Stand-by 5V) and wait for 3 seconds.
3) Push the S/W off (Disconnect SCL to GND using switch at jig).
4) Execute ‘Download.vi2c’ program in PC, then a main widow will be opened.
5) Double click the blue box and confirm "Bootloader Version"
6) Click the "Erase Flash" button.
7) Double click the download file low then, "edit" window will be opened.
8) Chick the choice button I n the "edit window", then "file choice window’ will be opened.
9) Choose the Hex file in folder and execute downloading with click "open button"
10) Click OK button at the "edit window"
11) Under downloading progress.
12) If download is failed, for example "No acknowledge from slave", execute download again from (1).
(3) Download method 3 (SET)
1) Push the “Tilt” button in an Adjust Remote control Then the LCD TV will change a “slave mode”.
2) Connect Zig to TV using a D-sub cable.
3) Execute ‘Download_CS.vi2c’ program in PC, then a main widow will be opened
4) Click "GO" button
[If you don’t push the “go”, the Hex file would not be downloaded although the download proceeds normally at first glance.]
5) Double click the blue box and confirm "Bootloader Version"
6) Click the "Erase Flash" button
7) Double click the download file low then, "edit" window will be opened.
8) Chick the choice button I n the "edit window", then "file choice window’ will be opened
9) Choose the Hex file in folder and execute downloading with click "open button"
10) Click OK button at the "edit window"
11) Downloading
12) If download is failed, for example "No acknowledge from slave", execute download again from (1)
Chancel memory download
(1) Connect the download jig to D-sub jack.
(2) Execute ‘Channel.vi2c’ program in PC, then a main window will be opened
(3) Push the button change and select the Channel memory data
(4) Check the communication is OK or not.
=> Push the Read area (Ackn. Check) and check Cyan area is OK message.
(5) Push the Update NVM from File
Tool Option Area Option Change
Before PCBA check, have to change the Tool option and Area option
Option values are below
(If no changed the option, the input menu can differ the model spec.)
The input methods are same as other chastises (Use adj Key on the Adjust Remote control)
EDID (The Extended Display Identification Data ) /DDC(Display Data Channel) download
Caution
- Use the proper signal cable for EDID Download.
- Never connect HDMI & D-SUB Cable at the same time.
- Use the proper cables below for EDID Writing.
Required Test Equipment
(1) Adjusting PC with S/W for writing EDID data.(S/W : EDID TESTER ver.2.5)
(2) A Jig for EDID Download.
(3) Cable : Serial(9Pin or USB) to D-sub 15Pin cable, D-sub 15Pin cable, DVI to HDMI cable.
Preparation for Adjustment
(1) As above Fig 5, Connect the Set, EDID Download Jig, PC&Cable.
(2) Turn on the PC & EDID Download Jig. And execute the S/W : EDID TESTER Ver.2.5.
(3) Set up the S/W option.
Repeat Number : 5
Device Address : A0
PageByte : 8
(4) Power on the Set.
Sequence of Adjustment
(1) DDC data of Analog-RGB
1) Init the data
2) Load the EDID data. (Open file)
[Analog - RGB : LP78B_RGB.ANA]
[Digital - HDMI1 : LP78B_HDMI1.DVI]
[Digital - HDMI2 : LP78B_HDMI2.DVI]
3)Set the S/W as below
4) Push the “Write Data & Verify”button. And confirm “Yes”.
5) If the writing is finished, you will see the “OK” message.

Adjustment of White Balance
Purpose and Principle
(1) Purpose: Adjust the color temperature to reduce the deviation of the module color temperature.
(2) Principle: To adjust the white balance without the saturation,Fix the one of R/G/B gain to 80 and decrease the others.
Adjustment mode
Two modes of Cool and Warm
(Medium data is automatically calibrated by the cool data)
 Required Equipment
(1) Remote control for adjustment
(2) Color Analyzer (CA-110 or CA-210 or same product) - ch9
(3) Auto W/B adjustment instrument(only for Auto adjustment)

Connecting diagram of equipment for measuring (For Automatic Adjustment)
Enter the adjustment mode of the white balance
Enter the white balance adjustment mode at the same time heat-run mode when pushing the power on by power only key.
Maintain the white balance adjustment mode with same condition of Heat-run. (Maintain after AC off/on in status of Heat-run pattern display)
(2) Release the white balance adjustment mode
Release the adjust mode after AC off/on or std-by off/on in status of finishing the Hear-run mode
Release the Adjust mode when receiving the aging off command(F3 00 00) from adjustment equipment
Need to transmit the aging off command to TV set after finishing the adjustment.
Standard color coordinate and temperature when using the CA-110 or CA210 equipment.
R/G/B GAIN Max value > 80
Luminance Min value is 200cd/m2 in cool mode [for LCD]
Adjustment of White Balance
(For Manual adjustment)
Adjustment mode : Two modes of Cool (Dynamic) and Warm(Mild) (Medium data is automatically calibrated by the cool data)
Color analyzer(CA110, CA210) should be used in the calibrated ch by CS-1000.(LCD : CH9)
For manual adjustment, it is also possible by the following sequence
Operate the zero-calibration of the CA-110 or CA-210, then stick sensor to the module when adjusting.
(1) Select white pattern of heat-run by pressing “POWER ON” key on remote control for adjustment then operate heat run longer than 15 minutes. (If not executed this step, the condition for W/B will be differ )
(2) Changing to the av mode by remote control.(av mode : av1 or av2 or av3)
(3) Display the internal pattern of the VCT-Pro IC by pushing the IN-START.
(4) Stick sensor to center of the screen and select each items (Red/Green/Blue Gain and Offset) using D/E(CH ±) key on R/C.
(5) Adjust R/ G/B Gain using F/G(VOL ±) key on R/C.
(6) Adjust two modes of Cool(Dynamic) and Warm(Mild) as below figure. (Fix the one of R/G/B and change the others)
1) Push the one time the in-start key : Dynamic(Cool)
2) Push the two more the in-start key : Mild(Warm)
Refer to the below case to know what value is fixed.
CASE
First adjust the coordinate much away from the target value(x, y).
 x,y > target
1) Decrease the R, G.
 x,y < target
1) First decrease the B gain.
2) Decrease the one of the others.
 In case of decreasing the x, decreasing the R: fix G
 In case of decreasing the y, decreasing the G: fix R
 x > target, y < target
1) First decrease B, so make y a little more than the target.
2) Adjust x value by decreasing the R 
 x < target, y > target
1) First decrease B, so make x a little more than the target
2) Adjust x value by decreasing the G.
(7) When adjustment is completed, Exit adjustment mode using EXIT key on R/C.
Input the Shipping Option Data
1) Push the ADJ key in a Adjust Remote control.
2) Input the Option Number that was specified in the BOM, into the Shipping area.
3) The work is finished, Push Stp Key.