L22DP03C, L22DP03U Hitachi LCD TV – Vestel 17MB29 chassis circuit descriptions and voltages

The system is a low to mid end; 22” 1680 x 1050 TFT TV solution basically for EU market with VCT4913G microcontroller / video audio processor chip on a 2-layer PCB. Since the target market is EU, the first release of the TV will support PAL/SECAM B/G/D/K/I/L/L’. The target panel is 22” W 1680 x 1050 TFT-LCD panels. A DVD loader is used to read DVD content and a DVB-T module card is used to support DVB-T.

Inputs
• 1xTuner (both analog and DVB-T)
• 1xDVD
• 1xScart
• 1xPC (VGA)
• 2xHDMI (optional)
• 1xBack AV (optional)
• 1xSIDE YPBPR (optional)
Outputs
• Speaker (stereo, 2x4 Ω, 2x4Watt)
• Headphone (stereo) (optional)
• Audio line out (stereo and mono) (optional)
• DVD/DVB-T coaxial SPDIF out(optional)

The system uses 17MB29 chassis.

17MB29 main board consists of two major blocks. The first block is analog front-end and this block is handled by VCTI chip that is highly multifunctional. VCTI performs Tuner IF demodulation, CVBS, RGB, SVHS and audio input selection and processing. The audio processor (MSP) supports equalizer, tone control, volume control, AVL, surround effect etc. The video processor (VSP) handles video processing such as color standard detection and demodulation, picture alignment (brightness,
contrast, color etc.). The IC also has a teletext decoder with fastext memory. The processed video output is sent to MST-TSUMU38BF, scaler/deinterlacer in RGB format together with a composite sync.  The TV tuner is PLL controlled symmetrical IF output type. The IF signal is filtered by a single SAW filter. Inter-carrier sound demodulation is performed by the system. After the SAW filter block, IF signal is processed by VCTI IF demodulator. Audio signal is digitally filtered in the IF demodulator block. The same IF signal is buffered and sent to DVB-T module card, tdm1300.Since VCTI can handle all the audio processing, there is no need for additional audio processor solution on the board.

MSP has two audio inputs which are assigned to the Scart in L/R and Audio Switch L/R output.
MSP has three audio outputs which are assigned to the headphone amplifier L/R input, audio amplifier L/R input and Audio switch L/R input. The board employs MP7721 and TDA1308 to drive speaker and headphone outputs, respectively. Switching control for other audio inputs and outputs (HDMI, Back AV, PC, DVD, and DVB-T) is achieved by an I2C controlled audio switch (TEA6422).

MST-TSUMU38BF has two ADC inputs. First ADC input is assigned to the VCTI RGB output.
Other RGB/YPbPr inputs are multiplexed for the second ADC input. HDMI receiver ANX9021 analog output, VGA RGB input and the synchronization signals are multiplexed by a primary RGB switch (PI5V512). MST-TSUMU38BF has an embedded LVDS transmitter. There are three PWM output ports.
PWM0 is assigned to analog/digital dimming control for the backlight, PWM1 is used for backlight on/off and panel logic power supply on/off control and PWM2 is used to control PC/HDMI switch IC (PI5V512).
 Power stage
The DC voltages required at various parts of the chassis and inverters are provided by a main power supply unit and power interface board. IPS generates 12V and 5V DC supply. Power stage which is on-chasis generates +12V for audio amplifier and 5V stand by voltage and 33V, 12V, 5V, 3.3V and 1.8Vsupplies for other different parts of the chassis.

TDM1300 board has no tuner on it. Instead, the tuner of 17MB29 is used for both analogue and digital reception. Tuner is controlled by either the 17MB29 microcontroller (VCTI), or TDM1300 board microcontroller. The IF (intermediate frequency) output of the tuner is sent to TDM1300 board for digital reception.

LVDS connector

This product include AC-DC flyback converter, DC-DC converter and DC-AC half bridge converter. There are two option whose total output power are 52W and 55W. This system does not have PFC (Power Factor Correction) coil.

Microcontroller/Video&Audio Processor (VCT4913G)
VCTI49xy is composed of microcontroller, video proccessor, display and deflection processor, sound proccessor and IF blocks.

VCTI49xyl family has two package types; PSSDIP88 and PMQFP144. PSSDIP88 package is chosen because of its convenience in the soldering process. PSSDIP88 package has two versions; 1 and 2. PSSDIP88-2 package is the “pinning mirrorred” version of PSSDIP88-1 and is preferred to be used for layout compatibility.

Scaler/De-interlacer (MST-TSUMU38BF)
The TSUMU38BF is total solution graphics processing ICs for LCD displays with panel resolutions up to XGA and WXGA+ / SXGA+ respectively. They are configured with a high-speed integrated triple-ADC/PLL, a high quality display processing engine, and an integrated multi-purpose output display interface that can support all major panel interface formats. To further reduce system costs, the MST517A-M also integrates intelligent power management control capability for green-mode requirements and spread spectrum support for EMI management.
The TSUMU38BF also incorporates a new Dynamic Frame Rate(DFR) generator for the digital output video to the display panel that preserves the advantages of a fixed output clock rate , while eliminating the output end of frame short-line.
MST has a built-in OSD generator with 291 character font programmable RAM. OSD generator supports 2/4/8 multi-color fonts, 8/16/256 color palette and 1K code attributes.

Power pins

IC EEPROM 2Kbx8(24LC02)

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 24LC01/02 devices may be connected to the same two-wire bus.

SPDIF Switch (NLAST4599)
The NLAST4599 is an advanced high speed CMOS single pole - double throw analog switch fabricated with silicon gate CMOS technology. It achieves high speed propagation delays and low ON resistances while maintaining low power dissipation. This switch controls analog and digital voltages that may vary across the full power-supply range (from VCC to GND).
The device has been designed so the ON resistance (RON) is much lower and more linear over input voltage than RON of typical CMOS analog switches.
The channel select input structure provides protection when voltages between 0V and 5.5V are applied, regardless of the supply voltage. This input structure helps prevent device destruction caused by supply voltage - input/output voltage mismatch, battery backup, hot insertion, etc.
Main features of NLAST4599 are:
• Select Pin Compatible with TTL Levels
• Channel Select Input Over-Voltage Tolerant to 5.5V
• Fast Switching and Propagation Speeds
• Break-Before-Make Circuitry
• Low Power Dissipation: ICC = 2A (Max) at TA = 25°C
• Diode Protection Provided on Channel Select Input
• Improved Linearity and Lower ON Resistance over Input Voltage
• Latch-up Performance Exceeds 300mA

• ESD Performance: HBM > 2000V; MM > 200V
• Chip Complexity: 38 FETs

CL21C650MLMXZD Samsung TV service mode and adjustments, fault and rectification, Schematic diagram

Samsung CL21C650 CRT TV Service mode and adjustments, fault symptoms and repair, schematic diagram

Troubleshooting by the Checksum

Diagnosis of trouble by the checksum is neither reliable nor convenient.
You can only use the checksum of the current direct-view TV to determine whether the software is corrupted or not.
The Checksum value is determined according to the version of the software loaded on the set.
Therefore, you can determine whether the software has been properly downloaded, if you know the correct checksum for that version of the software.
You can check the checksum according in the following order.
Factory Mode → Checksum → Enter → Output Checksum (e.g. 0xab2b)

Checksum Examples
T-SIXPEANM -1000.0 Checksum = XXXX

General Adjustment
In general, a color TV can provide ideal visual quality by adjusting the basic settings such as the vertical size, horizontal size, focus, etc.
Display a black and white picture on the screen to check if the picture is clearly displayed.
If there are some ‘spotted’ points on the screen when displaying a black and white picture, degauss the screen using the degauss coil. If the spotted points remain, re-adjust the purity and the convergence.
This completes the basic performance examination.

To enter Service Mode, press the keys on the remote control according to the following sequence. (in Stand-by status)

Info > Menu > Mute > Power ON

Adjusting the Picture Size
Since the KSBA chassis includes a deflection adjustment of the Factory Data, adjustments must be performed according to the following procedures when replacing the Main Board.

1. Display the Lion pattern.
2. Press “Power Off → Info → Menu → Mute → Power On” using the remote control and enter Factory Mode.

3. Enter Deflection Mode.
4. Adjust the V-AMP, V-SHIFT, H-EW and H-SHIFT items so that the width becomes 92 and the height becomes 92.

Adjusting the Picture Straight Lines
Display the Cross Hatch pattern.

Adjusting the Focus

,1. Display the Cross Hatch pattern.
2. Set the Screen Adjustment to “OK”.
3. Turn the Focus VR so that the horizontal and vertical lines are clearly displayed.
4. Check the Focus for the entire screen and adjust the Focus VR if necessary.

Adjusting the Screen Voltage
1. Select: Power OFF >  Info >  Menu >  Mute >  POWER ON
2. Initialize all settings to the values appropriate to the corresponding model make sure the video adjust 1 is the factory date.

3. Select: Mute, and get into the G2 adjust Toshiba pattern.

4. First check IBRM in “G2 Adjust” of Factory and adjust Screen VR until “Screen Adjust : OK”

Adjusting the White Balance

1. Select: Power OFF >  Info >  Menu >  Mute >  POWER ON
2. Initialize all settings to the values appropriate to the corresponding model.
3. Display the Toshiba pattern and adjust the White Balance using CA100 with the coordinates of the corresponding model

4. Enter Video Adjust1 of Service Mode. Adjust Low/Light.
- Adjust Sub Bright to set Y.
- Adjust B Cutoff to set y.
- Adjust R Cutoff to set x.
5. Enter Video Adjust1 of Service Mode. Adjust High/Light.
- Adjust Sub Contrast to set Y.
- Adjust B Drive to set y.
- Adjust R Drive to set x.
6. Check Low/Light and readjust it if its value has been changed.
7. If you have readjusted Low/Light, readjust High/Light until the two values are identical to the coordinates of the corresponding model.

Check List for the Screen Voltage and White Balance Adjustment
1. The Screen Voltage and White Balance are connected to each other, and both of them have to be configured to the correct values.
2. Adjust the White Balance after the Screen Voltage was adjusted, and check if the Screen Voltage is normal after adjusting the White Balance.
3. If the White Balance is readjusted, check the Screen Voltage again.
4. When the adjustment is finished, check the following checklist.
- If there is a spot on the screen when turning the TV set off/on, adjust the Screen Voltage again.
- If there is a ghost line on the screen, adjust the Screen Voltage again.

Block and Schematic diagrams

     Service help - Common faults

•Full screen with retrace lines – D209

•Crooked line in the middle of the screen – faulty vertical output IC LA78045.

•Vertical closing at the bottom – Zener diode ZD302, 24Volt supply, ZD303, 39Volt supply

•Closed vertical from the middle to the top – faulty vertical output IC LA78045

•High source voltage – horizontal drive transformer T401 or 1402.

•Dark image without video – Zener diode ZD210 - 9.1V

•LED flashes 5 times after switched off – filter capacitor C822A – 100MFD 160V

•Vertical fold at the top – DZ302, DZ303 short, DZ306 should be checked for short.

•Horizontal output transistor heats up very fast Q401 – C415. The 27K resistor connected to it measures 23K.

•Reduced image size, horizontal output transistor heats up too – C407 250nf 250V open. Replace the same.

•Blue screen with retrace lines = check the 15K resistor at the tube plate.

•Dark image when increasing the screen appears reduced image, with retrace lines and a horoxontal bar in the middle of the screen – 254J250V CR407S burned out capacitor.

•Picture without sound – Audio output IC faulty.

•Image behind – Memory fault.  Change the memory.

•No vertical deflection – LA78045 faulty or loose solder terminals.

`LED light turns ON and then turns OFF, protection triggers, buzzing sound as if the LOT is faulty. Bit not. – Zener 805, the transistor 806, transistor 805.

•Excess width – capacitor at the horizontal circuit. In this chassis, it has changed, but no number on the board.

•Image at the middle of the screen only, closed at sides – L408.

•TV On and the source goes up and enter protection, after horizontal output transistor TT2206 changed – Horizontal driver with open coil.

•Frame reduced. Horizontal closes. Fold in the middle of the screen – CR407 254J 250V, R426 2K2 1W.

•Screen with waves and the sourse voltage goes low and high – primary source section should be checked.

•Horizontal output transistor burns frequently – CR402S, C402 15nf.

•Set does not starts normally when LED turns OFF – transistor Q401 J6810 open.

•Vertical distortion at the top [closed], image present from the middle to the bottom – IC LA78045, D303.

•Source voltage does not work – 33V DZ12 leaky.

•Folds in the middle of the screen, horizontal closes – CR407s near the Flyback transformer.

•Lines on the top of the screen – D303.

•Vertical closed from the top to the middle of the screen – opened diode D303.

•Horizontal output transistor burns out – C415 27K short.

Electro help - Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....

LCD TV Monitors Acer AT2230 and AT2231 Service mode, software update, SMPS schematic, EDID data

The LCD TV will contain a main board, a power board a function keyboard and an IR board. The main board and power board will house the flat panel to control logic I2C bus, DDC, brightness control logic for LCD panel, DC-DC conversion to supply the appropriate power to the whole board and transmitting TTL level signals into LCD Module to drive the LCD display circuit.

The inverter board will drive the five CCFLs (Cold Cathode Fluorescent Lamp).
The function keyboard and Remote Control will provide the OSD control signal to the Main Board.

The high voltage was only generated by Power support part, if carelessly contacted the transformer on this module, can cause a serious shock.

D-SUB and HDMI PIN Distribution
This procedure gives you instructions for installing and using the LCD TV display.
(1) Position the display on the desired operation and plug the power cord into a convenient AC outlet. Three-wire power cord must be shielded and is provided as a safety precaution as it connects the chassis and cabinet to the electrical conduct ground. If the AC outlet in your location does not have provisions for the grounded type plug, the installer should attach the proper adapter to ensure a safe ground potential.
(2) Connect the 15-pin color display shielded signal cable to your signal system device and lock both screws on the connector to ensure firm grounding. The connector information is as follow:

Factory preset modes: analog RGB signal timing

The M220Z1-L03 model is a 22 inch wide TFT-LCD module with a 4-CCFL Backlight Unit and a 30-pin 2ch-LVDS interface. This module supports 1680 x 1050 WSXGA+ (16:10 wide screen) mode and displays up to 16.7 million colors. The inverter module for the Backlight Unit is not built in.

This monitor meets the Green monitor standards as set by the Video Electronics Standards Association (VESA) and/or the United States Environmental Protection Agency (EPA) and The Swedish Confederation Employees (NUTEK). This feature is designed to conserve electrical energy by reducing power consumption when there is no video-input signal present. When there is no video input signals this monitor, following a time-out period, will automatically switch to an OFF mode. This reduces the monitor's internal power supply consumption. After the video input signal is restored, full power is restored and the display is automatically redrawn. The appearance is similar to a "Screen Saver" feature except the display is completely off. The display is restored by pressing a key on the keyboard, or clicking the mouse.

Upgrade Firmware

Using USB port connecting PC & MST99980 Board via ISP board as below. Turn on the monitor and run ISP tool.

Click the button “Connect”, if it can identify the type of the device, please click the “Dis Con” and then click the “Connect” again.

Click the button “Read” to load the software file and then click the “Auto”.

When the picture showed as below, we can click the “run” to finish to upgrading.

How to enter the service mode [Factory mode]

To enter the factory mode menu: press “MENU+ “234” then enter FAC mode.

EDID data

Power board schematic

PC mode display adjustment

WHITE-D adjustment (B)
General set-up:
Equipment Requirements: Minolta CA-110 or Equivalent Color analyzer
Chroma 2250 or equivalent PC signal generator
Input requirements:
Input Signal Type: PC VGA signal
1024X768/60Hz PC mode with PGCWRGB pattern. (see pattern-1)
Input Signal Strength: 0.7 Vp-p linear voltage.
Input Injection Point: PC D-SUB input.

Alignment method
Initial Set-up:
1. Select source as “VGA”.
2. Set Contrast = 50 (CMO) and Brightness=50 (CMO), at Standard menu mode.
3. Apply “PGCWRGB”(pattern-1) pattern by VGA pattern generator.
4. Enter factory mode menu: press “MENU+ “234” then enter FAC mode
Alignment:
1. At FAC mode menu, select FACTORY->Picture ->ADC -> Auto Colour item. Then press “>” key to adjust ADC_GAIN_R, ADC_GAIN_G, ADC_GAIN_B and ADC_OFFSET_R, ADC_OFFSET_G, ADC_OFFSET_B. Then store those values to NVM.

White- Balance alignment
1. Select source as “HDMI1”
2. Apply Flat pattern (100% white pattern), at FAC mode menu, select Factory -> Picture -> Colour Temp item
3. Set color temperature to “Standard”.
4. Adjust the R Gain, G Gain, B Gain values to meet “Standard” color coordinates specification below. Then store those values to NVM.
5. Set color temperature to “Warm”.
6. Adjust the R Gain, G Gain, B Gain values to meet “Warm” color coordinates specification below. Then store those values to NVM.
7. Set color temperature to “Cold”.
8. Adjust the R Gain, G Gain, B Gain values to meet “Cold” color coordinates specification below. Then store those values to NVM.

Color temperature Standard/Warm/Cold (x, y) co-ordinates specification

Picture Mode	x	Y
Standard(6500oK)	0.314±0.015	0.329±0.015
Warm (5500oK)	0.332±0.015	0.341±0.015
Cold (7500oK)	0.300±0.015	0.310±0.015

Note:
1. Use Minolta CA-110 for colour coordinates and luminance check.
2. Luminance > 250 cd/m2 in the center of the screen when Brightness control at 100; Contrast control at 100
3. Reset AV setting, smart picture shall be recalled to be “Standard” and Contrast=50 (CMO), Brightness=50 (CMO)

L26H01U Hitachi TV – service mode, software update and more VESTEL 17MB22-2 board

This set uses 17MB22 Main Board consists of Micronas concept, VCTP as controller. This IC is capable of handling Audio processing, video processing, motion adaptive up conversion(MAU), Scaling-Display processing and FPD control (DPS),unified memory for audio video and Text, 3D comb filter-PC connectivity , OSD and text processing.

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 2x8W (10%THD) for stereo 8Ÿ speakers.

As the thickness of the TV set has a limit, a horizontal mounted tuner is used in the product, which is suitable for CCIR systems B/G, H, L/ L’, I/I’, and D/K. The tuning is available through the digitally controlled I2C bus (PLL). Below you will find info on the Tuner in use.

The MP7722 is a stereo 20W Class D Audio amplifier, intended for use as low frequency power amplifier in a wide range of applications in radio and TV sets.
It uses a minimum number of external components to complete a stereo Class D audio amplifier.

The DC voltages required at various parts of the chassis and inverters are provided by a main power supply unit and power interface board. The main power supply unit is designed for 24V and 12V DC supply. Power stage which is on-chassis generates +24V for audio amplifier, 1.8V and 3.3V stand by voltage and 8V, 12V, 5V and 3.3Vsupplies for other different parts of the chassis.

MICROCONTROLLER (VCTP)

The VCT 6wxyP is dedicated to high-quality FPD and double-scan TV sets. The VCT 6wxyP family is based on functional blocks contained and approved in existing products like VCT 49xxI, VSP 94x5B, and DPS 94xxA.
Each member of the family contains the entire audio, video, up-conversion processing for 4:3 and 16:9 50/60 Hz progressive or 100/120 Hz interlaced stereo TV sets and the control/data interface for flat-panel displays. The integrated microcontroller is supported by a powerful OSD and graphics generator with integrated teletext acquisition.

Multistandard Sound Processor (MSP) Features
The MSP receives the analog Sound IF signal from the tuner and converts it to digital with its internal SIF-AD converter. The MSP is able to demodulate all TV sound standards worldwide including the digital NICAM system. TV stereo sound standards that are unavailable for a specific VCTP version are processed in analog mono sound of the standard. In that case, stereo or bilingual processing will not be possible.

The TVT is a Teletext decoder for decoding World System Teletext data, as well as Video Programming System (VPS), Program Delivery Control (PDC), and Wide-Screen Signaling (WSS) data used for PALplus transmissions (line 23). The device also supports Closed Caption acquisition and decoding.

The TVT provides an integrated general-purpose, fully 8051-compatible microcontroller with television-specific hardware features. The microcontroller has been enhanced to provide powerful features such as memory banking, data pointer, additional interrupts, shared memory access etc.
The TVT has an internal XRAM of 32 KB and a BOOT ROM of 4 KB. For operation the code is fetched from a 16bit FLASH, which can be addressed up to 1 MByte.
The controller with dedicated hardware does most of the internal TTX acquisition processing, transfers data to/from external memory interface, and receives/transmits data via I2C-bus interface. In combination with dedicated hardware, the slicer stores TTX data in a VBI buffer of 1 KB. The microcontroller firmware performs all the acquisition tasks (hamming and parity checks, page search, and evaluation of header control bits) once per field. Additionally, the firmware can provide high-end Teletext features like Packet-26 handling, FLOF/TOP and list-pages. The interface-to-user software is optimized for minimal overhead. TVT is realized in deep submicron technology with 1.8 V supply voltage and 3.3 V I/O (TTL compatible).

The TVT is a Teletext decoder for decoding World System Teletext data, as well as Video Programming System (VPS), Program Delivery Control (PDC), and Wide-Screen Signaling (WSS) data used for PALplus transmissions (line 23). The device also supports Closed Caption acquisition and decoding.
The TVT provides an integrated general-purpose, fully 8051-compatible microcontroller with television-specific hardware features. The microcontroller has been enhanced to provide powerful features such as memory banking, data pointer, additional interrupts, shared memory access etc.

OSD and Teletext Features
The on-chip display unit for displaying Level 1.5 Teletext data can also be used for customer-defined onscreen displays.
The TVT has an internal XRAM of 32 KB and a BOOT ROM of 4 KB. For operation the code is fetched from a 16bit FLASH, which can be addressed up to 1 MByte.
In combination with dedicated hardware, the slicer stores TTX data in a VBI buffer of 1KB. The microcontroller firmware performs all the acquisition tasks (hamming and parity checks, page search, and evaluation of header control bits) once per field. Additionally, the firmware can provide high-end Teletext features like Packet-26 handling, FLOF/TOP and list-pages. The interface-to-user software is optimized for minimal overhead.

DRX 3961A

The DSP-based Analog TV IF Demodulator DRX 396xA performs the entire multistandard Quasi Split Sound (QSS) TV IF processing, AGC, video demodulation, and generation of the sound IF (SIF), requiring only one SAW filter. The IC is designed for applications in TV sets, VCRs, PC cards, and TV tuners.
The alignment-free DRX 396xA does not need special external components. All control functions and status registers are accessible via I2C bus interface.

SERIAL 64K I2C EEPROM M24C64WBN6

M24C64WBN6 is a 64 Kbit Electrically Erasable PROM. These I2C-compatible electrically erasable programmable memory (EEPROM) devices are organized as 8192x8 bits. It supports 400kHz Protocol I2C uses a two-wire serial interface, comprising a bi-directional data line and a clock line.
The M24C64WBN6 is available in the standard 8-pin (Vcc, WC, SDA (i2c data), SCL (i2c clock), Vss,E0,E1,E2). WC pin is critcal pin. If WP is high, writing is not possible to EEPROM. If WP is low, writing is possible to EEPROM.

LM1117

General Description
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 band gap reference to as-sure 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 10µF tantalum capacitor is required at the output to improve the transient response and stability.

24LC02

24AA02/24LC02B (24XX02*) is a 2 Kbit Electrically Erasable PROM. The device is organized as one block of 256 x 8-bit memory with a 2-wire serial interface. Low-voltage design permits operation down to 1.8V, with standby and active currents of only 1µA and 1mA, respectively. The 24XX02 also has a page write capability for up to 8 bytes of data.

The MAX809 and MAX810 are cost-effective system supervisor circuits designed to monitor VCC in digital systems and provide a reset signal to the host processor when necessary. No external components are required.
The reset output is driven active within 10 _sec of VCC falling through the reset voltage threshold. Reset is maintained active for a timeout period which is trimmed by the factory after VCC rises above the reset threshold. The MAX810 has an active high RESET output while the MAX809 has an active low RESET output. Both devices are available in SOTí23 and SCí70 packages.

SERVICE MENU

First Press “MENU”

Then press the remote control code, which is “4725”

Video Setup
Panel Select <..................................>
CHI MEI 16/9 26 inch
LG 16/9 26 inch
SAMSUNG 16/9 26 inch

Picture Mute <.....>
If “Yes” selected, “Picture mute” feature is active.
Blue Screen <.....>
If “Yes” selected, “Blue Background” item is seen in “Feature”
menu.

 YC Delay <...........>
Tuner PAL <.....> Value between -8 to+7
 Ext PAL <.....> Value between -8 to+7
SECAM <.....> Value between -8 to+7
NTSC <.....> Value between -8 to+7
AGC (dB) <.....> Value between 0 to+8

AudioSetup
Equalizer <.....>
If “Yes” selected, “Equalizer” item is seen in “Sound” menu.

BBE
SRS WOW
Virtual Dolby Surround <.....>
If “Yes” selected, Virtual Dolby Surround feature is seen in “Sound”
menu with selected Virtual Dolby Text.
Virtual Dolby Text The selected item is seen as Virtual Dolby Srround Text.
3DS
Virtual Dolby
3D Panorama
AVL <.....>
If “Yes” selected, “AVL” item is seen in “Sound” menu.
Carrier Mute <.....>
If “Yes” selected, “Carrier mute” feature is active.
Audio Delay Offset
Prescale
FM Presc. AVL On <.......> Value between 0 to +127
AM Presc. AVL On <.......> Value between 0 to +127
NICAM Presc. AVL On <.......> Value between 0 to +127
 I2S Presc. AVL On <.......> Value between 0 to +127
 SCART Presc. AVL On <.......> Value between 0 to +127
 FM Presc. AVL Off <.......> Value between 0 to +127
 AM Presc. AVL Off <.......> Value between 0 to +127
 NICAM Presc. AVL Off <.......> Value between 0 to +127
 I2S Presc. AVL Off <.......> Value between 0 to +127
 SCART Presc. AVL Off <.......> Value between 0 to +127
 Dynamic Bass <.....>
If “Yes” selected, “Dynamic Bass” item is seen in “Sound” menu.
 Subwoofer <.....>
If “Yes” selected, “Subwoofer” item is seen in “Sound” menu.

Options 1
 VCTP Version <.......>
 Basic+
 Basic
 Double Digit <.....>
If “Yes” selected, “Double Digit” button is active for channel
selection.
 TEA6415C Available <.....>
If “Yes” selected, video switch IC is active on hardware.
 TEA642X Available<.....>
If “Yes” selected, audio switch IC is active on hardware.
 Power-Up Mode <.......>
 StandBy If selected, TV opens in stand by mode.
 L.State If selected, TV opens in Last State mode.
 TV Open Mode <.......>
 Source
 1st TV
 Last TV

Select Languages <.......> “Yes” selected languages are seen as option under the “Language” item in “Feature” menu
Language Set 1
 German <.......>
 French <.......>
 Spanish <.......>
 Italian <.......>
 Danish <.......>
 Finnish <.......>
 Swedish <.......>
 Language Set 2
 Greek <.......>
 Norwegian <.......>
 Dutch <.......>
 Portuguse <.......>
 Polish <.......>
 Turkish <.......>
 Russian <.......>
 Czech <.......>
 Language Set 3
 Hungarian <.......>
 Slovak <.......>
 Slovenian <.......>
 Romanian <.......>
 Bulgarian <.......>
 Croatian <.......>
 Serbian <.......>
 Hebrew <.......>
 First APS <.......>
If “Yes” selected, first time TV opens by asking APS.
 APS Volume <.......> value between 0 to+63
 Burn In Mode <.......>
If “Yes” selected, TV opens with Burn-In mode. This mode is used in manufacturing.
 APS Test
 HDMI WP <.......>
If “Yes” selected, HDMI EDID ROM is write protected.
 Options 2
 Autostore <.......>
If “Yes” selected, Channel is automatically stored.
 Led Type <.............................>
 1 Led 1 Colour
 1 Led 2 Colours
 2 Led 2 Colours
 PC PIP <.......>
 PC Stand By <.......>

Service Scan/Tuning Setup
 Search for L/L’ <.......>
 Pref. Search Standard <...........>
 BG, DK, I
 L/L’
 M
 Station Ident <.......>
 ATS Delay Time (ms) <.......> Value between 20 to 250
 Color Killer Threshold <.......> Value between 0 to +255
 Tuner Options <.......>
 Control Byte <.......> Value between 0 to +255
 Low-Mid – Low Byte <.......> Value between 0 to +255
 Low-Mid – High Byte <.......> Value between 0 to +255
 Mid-High – Low Byte <.......> Value between 0 to +255
 Mid-High – High Byte <.......> Value between 0 to +255
 BSW1 <.......> Value between 0 to +255
 BSW2 <.......> Value between 0 to +255
 BSW3 <.......> Value between 0 to +255
 External Source Settings
 DTV <.......>
 DVD <.......>
 Ext 2 S-Video <.......>
 Ext 3 <.......>
 Ext 3 S-Video <.......>
 FAV <.......>
 BAV <.......>
 S-Video <.......>
 HDMI 1 <.......>
 HDMI 2 <.......>
 YPbPr <.......>
 PC <.......>
 Picture Mode
 Sources <.......>
 Tuner
 CVBS
 RGB
 SVHS
 HDMI
 YPbPr
 PC
 PIP
 Picture Mode <.......>
 Dynamic
 Natural
 Cinema

Colour Temp <.......>
 Cool
 Normal
 Warm
 Contrast <.......> Value between 0 to +63
 Brightness <.......> Value between 0 to +63
 Sharpness <.......> Value between 0 to +15
 Colour <.......> Value between 0 to +63
 Backlight <.......> Value between 0 to +255
 R <.......> Value between -63 to +63
 G <.......> Value between -63 to +63
 B <.......> Value between -63 to +63
Reset TV-Set
 Initialize NVM from ROM
Press green button to reset the NVM from ROM

SOFTWARE UPDATE DESCRIPTION
Analog Software Update Via I2C
Step.1
Short the second and third pins of PL_406. Power ON and keep shorting the pins 3-5 seconds.
Step.2
Then connect the I2C update tool to parallel port of PC.
Step.3
Connect the other end of the tool to PL_406.
Step.4
Run Cosima_VCTP Visual I2C software update program.
Step.5
When you click to box near “0” at “Bootloader Version” item, you will see “40”.
If you couldn’t see “40” or a “No Acknowledge from Slave!” is appeared,
There may be a connection problem sourced from PC port, or update tool.
Or you may forget to power ON.
Step.6
After “40” is seen, Click “Erase Flash”
Step.7
Select the bin. file from near the “Load Bin”
Step.8
Click “Load Bin” and load the required bin. file.
Step.9
Unpick the I2C cable from Chassis

Step.10
Power off and on again TV set to produce hard reset.
Step.11
Initialize the NVM from “Reset TV-set” item from service menu
Analog Software Update Via UART
Step.1
Connect the serial cable from PC Com port to PL104 connector on 17PRG01 module card.
Step.2
Connect the programming cable from PL 102 connector on 17PRG01 module card to PL408 connector on TV chassis side. The arrow sign “¨” on the connector must see the PCB side of the chassis. If TV is seen from the back cover, arrow sign must see the TVs back cover
Step.3
Run a RS232 terminal tool like Hyper Terminal.
Step.4
Following settings of the terminal tool are necessary:
Protocol: Xmodem
Port: COMx
Baud Rate: 115200
Data Bits: 8
Parity: none
Stop Bits: 1
Com. Control: none
Step.5
Load the bin file from “Browse” and Click “Send”
Step.6
Power off and on again TV set to produce hard reset.

SOFTWARE UPDATE PROCEDURE FOR 17MB22 CHASSIS
 Hardware connection
 Digital Software Update
 Software setup
Flashing Sequence
Analog Software Update
Software setupFlashing Sequence
Software update to 17MB22 is possible using the UART protocol. PL408 connector shown in below figure is used to update the software.

Hardware connection
17PRG01 module, which is also able to update software of 17MB24 and 17MB15 chassis, is used as a level converter in order to regulate voltage levels. PL101 and PL102 connectors of module card are used to software update of DTV and ATV of 17MB22 chassis respectively.
Data is sent from a PC using RS-232 standard via RS232 terminal tool such as Hyper Terminal, to module card.
Cables used in the process 2 must be plugged to PL101 connector for Digital software update and PL102 connector for Analog software update on module card side and PL408 connector on TV chassis side. The arrow sign “¨” on the connector must see the PCB side of the chassis. If TV is seen from the back cover, arrow sign must see the TVs back cover.

Data transfer from PC to 17MB22 is established by a RS232 terminal tool like Hyper Terminal.

Protocol: 1K Xmodem
Port: COMx
Baud Rate: 115200
Data Bits: 8
Parity: none
Stop Bits: 1
Com. Control: none

• Switch TV on and wait at stand by mode. Then connect UART module as described above.
Open terminal emulation on PC (e.g. “Hyper Terminal”)
• Check the settings given above and correct if necessary. Select the TV software from the “Send” button browsing PC (e.g. newrelease.img). Select the 1K Xmodem protocol.
Before flashing the DTV, switch on TV and exit from stand by mode in order to check whether there is any connection or setting problem. Terminal window displays the message.

• After preparing the sending data, Press “Send” button and immediately exit from stand by mode.
• The “Terminal Window” of the PC displays the data transfer.

• At the end of the data transfer TV erases the flash and writes the new software to flash.
• Power off and on again TV set to produce hard reset.

Analog Software Update

Software setup
Data transfer from PC to 17MB22 is established by a RS232 terminal tool like Hyper
Terminal. Following settings of the terminal tool are necessary:
Protocol: Xmodem
Port: COMx
Baud Rate: 115200
Data Bits: 8
Parity: none
Stop Bits: 1
Com. Control: none

Flashing Sequence
• Switch TV off and connect UART module as described above. Open terminal emulation on PC (e.g. “Hyper Terminal”)

• Check the settings and correct if necessary. Select the TV software from the “Send” button browsing PC (e.g. newrelease.bin). Select the Xmodem protocol. Prepare for sending data but do not yet press “Send” button.

• Press “Send” button and immediately switch on TV chassis while pressing “Volume-” (Volume minus) button on the keyboard (“Volume”- must be pressed before switching on TV), and keep button pressed until TV starts to receiving data from PC.
• The “Terminal Window” of the PC displays the data transfer (Fig11). When TV starts receiving data from the PC “Volume-” button may be released. It needs about 2 minutes to upload the whole software. At the end “Flash Programming Complete” will be displayed.

• Power off and on again TV set to produce hard reset.
*NOTE: To proceed with this procedure software versions must be compatible. Otherwise software will not overwitten to avoid uncontrolled flashing.
*17MB22_STD_0.0.31 or newer releases(0.0.32, 0.0.33 ...) cannot be flashed via HyperTerminal to TV sets which has 17MB22_STD_0.0.30 or older versions (software is not computable).

TH L39EM5D – Panasonic LCD TV – how to enter the service mode, adjustments, Power board voltages and schematic

Power LED blinking timing chart - Chassis: KM18, Destination: India

How to enter into service mode

While pressing Volume (-) button of the main unit, press (INFO) button of the remote control three times within 2 seconds.

Contents of the adjustment mode

·         Value shown as a hexadecimal number.

·         Preset value differs depending on models.

·         After entering the adjustment mode, take note of the value in each item before starting adjustment.

To exit the service mode, off the power with the power button on the main unit, or the power button on the remote control.

SRV Tool

To access this tool:

Select the (SRV-Tool) in service mode.

Press OK button on the remote control.

To display the SOS history

SOS history (number of LED blinking) indication.

From the left side; last SOS, before Last, three occurrence before, 2^nd occurrence after shipment, 1^st occurrence after shipment.

This indication except 2^nd and the 1^st occurrence after shipment will be cleared by [self-check indication and forced to factory shipment setting]

Power on time count

To display the Time count menu, highlight position, and then press Mute for 3 seconds.

Time: cumulative power On time, indicated hour, minute be decimal.

Count: number of ON times by decimal.

This indication will not be cleared by either of the self checks or by other command.

To exit, disconnect the AC chord fro wall outlet.

Self-check mode

Press the Menu button n the remote control, and the Volume Down button on the SCD panel.

Press the ON/Off button on the panel to exit.

Hotel mode adjustment

In order to display the Hotel mode setup menu, enter the following command; within 2 seconds.

TV: VOL DN +

Remote: Input 3 times.

To exit the hotel mode setup menu, disconnect AC power cord from the wall socket.

To check the IIC bus lines

Self check indication only:

Produce TV reception screen, and while pressing Volume[-] button on the main unit, press [Ok] button on the remote control  for more than 3 seconds.

Self-check indication and forced to factory shipment setting:

Produce TV reception screen, and while pressing [Volume (-)] button on the main unit, press [Menu] button on the remote control for more than 3 seconds.

Disconnect the AC cord from the wall socket to Exit.

Power LED blinking timing chart

When an abnormality occurs, the protection circuit will operate and the reset the unit to stand by mode.  During this time, the defective block can be identified by the number of blinking times of the power LED on the front panel of the unit.

Voltages of A and P boards and the schematic of P-Board

Power board-TNP4G532AA – schematic

24PHG4032 – Philips LCD TV – how to enter the service mode, software update, SMPS schematic

TPM17.5L LA- Chassis, MTK5561 – Platform, 24PHG4032/77 – Model

Display resolution
640 x 480 - 60Hz
800 x 600 - 60Hz
1024 x 768 - 60Hz
1360 x 768 - 60Hz

Video formats
Resolution — Refresh rate
480i - 60Hz
 480p - 60Hz
 576i - 50Hz
 576p - 50Hz
 720p - 50Hz, 60Hz
 1080i - 50Hz, 60Hz
 1080p - 24Hz, 25Hz, 30Hz, 50Hz, 60Hz

Picture / Display
 Display type: - LED backlight HD
 Diagonal size: - 59.8 cm / 24 inches
 Aspect ratio: 16:9 (widescreen)
 Panel resolution: - 1360x768p @60Hz
 Picture enhancement: Digital Crystal Clear
 Picture Performance Index (PPI): 240

Service Modes
The Service Mode feature is split into following parts
Factory Mode
Customer Service Mode (CSM).

SAM and the Factory mode offer features, which can be used by the Service engineer to repair/align a TV set.
The CSM is a Service Mode that can be enabled by the consumer. The CSM displays diagnosis information, which the customer can forward to the dealer or call centre.

 In CSM mode, “CSM”, is displayed in the top right corner of the screen. The information provided in CSM and the purpose of CSM is to:
Increase the home repair hit rate.
Decrease the number of nuisance calls.
Solve customers’ problem without home visit.
Note: For the new model range, a new remote control (RC) is used with some renamed buttons. This has an impact on the activation of the Service modes. 

For instance the old “MENU” button is now called “HOME” (or is indicated by a “house” icon).

Factory mode
To perform extended alignments.

How to Activate the Factory mode
To activate the Factory mode, use the following method:
Press the following key sequence on the remote control transmitter: from the “menu/home” press “1999”, directly followed by the “Back/Return” button. Do not allow the display to time out between entries while keying the sequence.
After entering the Factory mode,  can see many items displayed, use the UP/DOWN keys to display the next/previous menu items

How to Exit the Factory mode
Use one of the following methods:
Select EXIT_FACTORY from the menu and press the “OK” button.
Note: When the TV is switched “off” by a power interrupt, or normal switch to “stand-by” while in the factory mode, the TV will show up in “normal operation mode” as soon as the power is supplied again. The error buffer will not be cleared.

Customer Service Mode (CSM)
The Customer Service Mode shows error codes and information on the TVs operation settings.The call centre can instruct the customer (by telephone) to enter CSM in order to identify the status of the set.This helps the call centre to diagnose problems and failures in the TV set before making a service call.
The CSM is a read-only mode; therefore, modifications are not possible in this mode.
Ignore “Service unfriendly modes”.
Line number for every line (to make CSM language independent).
Set the screen mode to full screen (all contents on screen is visible).
After leaving the Customer Service Mode, the original settings are restored.
Possibility to use “CH+” or “CH-” for channel surfing, or enter the specific channel number on the RC.
How to Activate CSM
To activate CSM, press the following key sequence on a standard remote control transmitter: “456987” (do not allow the display to time out between entries while keying the sequence). After entering the Customer Service Mode, the following items are displayed. use the Right/Left keys to display the next/previous menu items
Note: Activation of the CSM is only possible if there is no (user) menu on the screen.

How to Navigate
By means of the “CURSOR-DOWN/UP” knob (or the scroll wheel) on the RC-transmitter, can be navigated through the menus.

How to Exit CSM
To exit CSM, use one of the following methods.
Press the MENU/HOME button on the remote control transmitter.
Press the POWER button on the remote control transmitter.
Press the POWER button on the television set.

Software Upgrading
The following update is for .bin file.
1. Rename the file to “Usb_update.bin”
2. Prepare a USB memory.
3. Copy the software to USB flash disk(root directory).
4. Switch off the TV and Insert the USB memory stick that contains the software update files in one of the TV’s USB 2.0 ports.
5. Switch on the TV. The TV will detect the USB memory stick automatically.

6. When the TV software is updated, the TV will turn on again automatically. Remove the USB flash drive.
7. We can enter in CSM or Factory mode to check the current software version.

Check the SW version
1. After burning software, TV will restart.
2. Press “Menu+1999+back”, enter Factory mode to check if the software version is correct
Caution: Please make sure that software upgrade is finished before unplug the USB and AC power.

Power Supply Unit
 Philips LCD TV power supplies are a black box for Service. When defective, a new board must be ordered and the defective one must be returned, unless the main fuse of the board is broken. Always replace a defective fuse with one with the correct specifications. This part is available in the regular market.
Consult the Philips Service web portal for the order codes of the boards.
Important delta’s with the platform are:
New power architecture for LED backlight
“Boost”-signal is now a PWM-signal + continuous variable
The control signals are
 PS-ON
 Lamp “on/off”
 DIM (PWM) (not for PSDL)
No detailed information is available because of design protection issues.
 +12 output (on-mode)
 +12V_audio (audio AMP power)
 Output to the display; in case of
- IPB: High voltage to the LCD panel
- PSL and PSLS (LED-driver outputs)
- PSDL (high frequent) AC-current.

Diversity

The diversity in power supply units is mainly determined by the diversity in displays.
The following displays can be distinguished:
 CCFL/EEFL backlight: power panel is conventional IPB
 LED backlight:
- side-view LED without scanning: PSL power panel

- side-view LED with scanning: PSLS power panel
- direct-view LED without 2D-dimming: PSL power panel
- direct-view LED with 2D-dimming: PSDL power panel.
PSL stands for Power Supply with integrated LED-drivers.
PSLS stands for a Power Supply with integrated LED-drivers with added Scanning functionality (added microcontroller).
PSDL stands for a Power Supply for Direct-view LED backlight with 2D-dimming.

DC/DC Converters
The on-board DC/DC converters deliver the following voltages(depending on set execution):
 PVDD from the power 12V_AMP for the AUDIO AMP.
 3V3SB, permanent voltage for the Stand-by controller, LED/IR, keyborad receiver and controls.
 +12V, input from the power supply for the panel common(active mode)
 +12V, input from the power supply for the AMP
 DDRV supply voltage for DDR
 TUNER3.3V, supply voltage for tuner
 +5V_SW, input intermediate supply voltage for the USB Power
 3V3SB, from the power supply for the scaler IC MT5561
 DVDD3V3, +1V2,clean voltage for Demodulator IC channel decoder.

Electro help - Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....