Sharp LC LC-26D44, LC-32D - How to enter the Service mode, Service adjustments and Power Supply (SMPS) Schematic diagram - 26 and 32 inch LCD TVs

 

Models:
LC-26 - 32D44 EE - BK - GY → Continental
LC-26 - 32D44 ES - BK - GY → Sweden Market
LC-2 -32D44 EK -BK - GY → United Kingdom
LC-26 - 32D44

LC-26 and LC 32D44 Models

* ASV & Black TFT LCD.
• HD Ready Panel (1366 x 768) WXGA with 4ms response.
• Wide vision angle (H/V 176º).
• High brightness and contrast (1.500:1).
• Interlaced and progressive mode compatible (I/P).
• Built-in DVB-T Tuner.
• Multistandard Video and audio:
- Multistandard Video & audio .
- Video: PAL/SECAM & NTSC (AV only).
- TV: B/G, I, D/K, L & L’.
- Sound: NICAM & A2 (IGR).
• OSD multilanguage.
• 2 HDMI 1.2 inputs (Video Digital, Audio Digital & Analog).
• Analog mode PC input.
• Components Input ( 3RCA to 15pin D-sub adapter).
• RGB at EXT1/EXT2 Terminal.
• RS-232C.
• AV-Link at EXT2.
• Does not support CEC at HDMI.
• Active Backlight (dynamic contrast 10.000:1)
• Sleep Timer.
• Does not support “RC Path Through” by Pin Nº 9 of Service Connector.

* Dual-Input HDMI 1.2, HDCP 1.1 and DVI 1.0 compliant receiver.
2- Integrated TMDSR core.
3- Digital video interface supports video processors:
• 24-bit RGB/YCbCr 4:4:4
• 16/20/24-bit YCbCr 4:2:2
• 8/10/12-bit YCbCr 4:2:2 (ITU BT.656)
• 12-bit DMO (Digital Multimedia Output) RGB/YCbCr 4:4:4 (clocked with rising & falling edges)
• Color Space Conversion for both RGB-to-YCbCr and YCbCr-to-RGB (both 601 and 709)
• Auto video mode configuration simplifies system firmware design.

4- Digital audio interface supports high-end audio systems:
• One programmable I2S output for connection to low-cost DACs at 32-192kHz.
• S/PDIF output supports PCM, Dolby Digital, DTS digital audio transmission (32-192 kHz Fs) using IEC60958 and IEC61937.
• Auto audio error detection with programmable soft mute.
5- Integrated HDCP decryption engine for receiving protected audio and video content.
6- HDCP Built in Self Test (BIST) lowers cost to test HDCP operation.
7- Pre-programmed HDCP keys provide highest level of key security, simplifies manufacturing.
IC1922 & IC1902: NVM OF HDMI (E-EDID)
* Part Number : 24LC2BIN SHARP Code: VHI24LC2BIN-1Y
This IC is a 2-wire (I2C bus type) serial EEPROM this is electrically programmable. This EEPROM chip stores the data structure used to carry configuration information for optimal use of a display (EDID data).
IC4001: DIGITAL PROCESSOR MPEG 1/2 DECODER (Audio/Video)
* Part Number : STI5105ALC SHARP Code: RH-IXC243WJZZQ
The STi5105ALC sets a new standard for set-top box decoder ICs, delivering outstanding performance, features and innovations to dramatically reduce cost compared with previous generations. The Sti5105 features an even faster ST20CPU with direct map, single cycle caches to boost performance.
Graphics and display capabilities have been enhanced with the provision of a blitter engine for formatting and fi nal display composition. Color formats (CLUT8 and true color ARGB16) and display planes (background, still picture, video and OSD graphics) are provided. Overall system performance benefits from the integration of SDRAM (DDR or SDR) external memory, that provides a unified memory system with high bandwidth and low latency CPU access over a 16-bit interface.
System cost reduction is further promoted by the integration of additional peripheral and system services functions, such as VCXO, an enhancer reset controller DVB-CI support, smart card power control and improved low power and standby functionality.

1-An enhanced ST20 32-bit VL-RISC CPU with a 200MHz clock, 4Kbytes of instruction cache, 4Kbytes of data cache and 2Kbytes of embedded SRAM.
2- A 16-bit, 166MHz Shared Memory Interface, with support for 64- and 128-bit configurations.
3- A programmable External Memory Interface supporting 4 separately configurable banks of SRAM, Flash and DRAM.
4- An MPEG-2 (MP@ML) decoder, including trick modes such as smooth fast-forward and rewind.
5- A Graphics/Display unit with 4 display planes, alpha blending, ant aliasing and ant flutter filters, sub picture decoder, and blitter display compositor with separate OSD (On-Screen Display) controls for TV and VCR outputs.
6- PAL/NTSC/SECAM encoder.
7- CGMS, Teletext, WSS, VPS encoder.
8- MPEG-1 layer I/II audio subsystem with embedded DSP for all popular audio formats.
9- A full range of on-chip peripherals, including 2 UARTs, 3 parallel I/O banks, 1 smartcard interface, four PWM channels, 1 IR transmitter/receiver etc.

IC4252: NVM 64Kb-E2PROM FOR DIGITAL PROCESSOR (IC4001).
Part Number : BR24S64FVM-WTR SHARP Code: VHIBR24S64M-1Y
The BR24S64FVM is a 2-wire (I2C bus type) serial EEPROM that is electrically programmable. This IC stores all data related to the Digital Module (channels, user settings etc)

IC3001: Main CPU / VIDEO PROCESSOR.
Part Number: VCT7993P-FA-A1-H000 SHARP Code: RH-IXC354WJZZQ
The VCT 77VWP (VCT-Pro) family is dedicated to high-quality FPD and double-scan TV sets. The memory and program ROM are integrated in the IC. Modular design and deep submicron technology allow the integration of audio, video, Teletext, OSD, and controller-related functionalities.
They cover the whole range of flat-panel display TVs. Each member of the IC 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 plus the control/data interface for flat-panel displays. The integrated microcontroller supports a powerful OSD and graphics generator with integrated Teletext acquisition.
The VCT 77vwP family provides a front-end video-processing unit with 4 CVBS-Y/C or component inputs for HDTV, EDTV and SDTV. A VBI slicer, support of 2000 pages of Teletext, and a 3-D comb fi lter for PAL and NTSC (in certain versions) are also available. The front-end unit further allows processing an SD and an HD source in parallel, thus enabling PiP and PaP functionality. Motion-adaptive de-interlacing, temporal noise reduction, and fi lm mode detection are based on a unified memory technology. Post-scaling in the display-processing block ensures the desired output format.
Display processing is supported by an 8-bit 8051-compatible controller. By means of powerful alpha blending, the graphics mixer composes the output image from following image layers: the video layer, the OSD layer and the pixel graphics layer. The audio part consists of a multi-standard sound IF demodulator and a base-band processor supporting all desired sound features in this range.
The VCT-Pro front-end video processing unit offers 16 analog video inputs (CVBS/Y/C, RGB/Y Cr Cb) as well as digital interfaces for SDTV and HDTV. Latest 3D+ comb fi lter generation provides highest performance for PAL/NTSC signals.
A VBI slicer, supporting up to 2000 pages of Teletext completes the analog video front end. 3D-motion-adaptive de-interlacing, temporal noise reduction and fi lm mode detection are based on a unified memory technology.

This IC includes the main features show below:
1- Stereo Decoder Audio Processing.
2- Video Front-end 3D Comb fi lter, PC Connectivity.
3- Motion Adaptive Deinterlacer.
4- Scaling, Display Processing and FPD Control.
5- Unified Memory for Audio, Video and Teletext.
6- OSD and Teletext processor.
7- Main CPU(TV controller)

IC3051: NVM 64Kb-E2PROM FOR ANALOG PROCESSOR (IC3001).
Part Number: BR24S64FVM-WTR SHARP Code: VHIBR24S64M-1Y
The BR24S64FVM is a 2-wire (I2C bus type) serial EEPROM that is electrically programmable. This IC stores all data related to the Analog Module (Channels, User settings, etc.)
IC2302: SUB-CPU AND PORT EXPANSOR.
Part Number: TMP86FS49AUG-6NU2 SHARP Code: RH-IXC009WJZZQ
This IC functions as ports Expansor of the main microcontroller (e.g leds, remote control, key, Power Supply supervisor, Audio mutes, LCD controller signals, temperature sensor, lamp error, etc..).
This microcontroller integrates 60KB of Flash memory, 2KB of RAM. It’s including 56 I/O pins (13 high current) with 2 UARTS, 1 I2C serial link, 16 channels of 10 bits A/D converters, 2 timers 16 bits.
IC1301: DIGITAL AUDIO POWER AMPLIFIER
Part Number: YDA147-SZE2 SHARP Code: VHIYDA147SZ-1Y
This IC is a Stereo 20W (10W+10W) digital audio power amplifier. The IC is class D amplifi er equipped with the function for the dynamic self-adjustment of the output volume in proportion to the amplitude of the input signal. The company calls the function of automatic adjustment of the installed
output volume “DRC (dynamic range compression)”.
The modulation method adopted PWM. An external LC fi lter is unnecessary. It only has to supply the output signal directly to the speaker. It has the
output control function to prevent an excessive input to the speaker. The maximum output electric power can be set to an arbitrary size by external
resistance. Besides this, the protection function to overheating and the over current was installed.
The switching operation of power MOS-FET is installed and the technology that carefully controls the slewing rate is installed. Moreover, the automatic offset circuit that suppresses the pop noise when the power supply start is built into.

IC8103: LCD CONTROLLER
Part Number: T3Z18AFG-0003 SHARP Code: VHIT3Z18AFG-1Q
This IC is a custom Gate Array of Toshiba. The alias of this IC is EAGLE2 and is marked as SHARP. This IC is generating all the necessary timing signals for controlling the panel and the RSDS interface for data..
IC8101: NVM 256Kb -E2PROM FOR LCD CONTROLLER (IC8103)
Part Number: M24256-BWMN6TP SHARP Code: VHIM24256B +-1L
The BR24256B is a 2-wire (I2C bus type) serial EEPROM that is electrically programmable. This IC stores all data related to the LCD Controller (Gamma, timings, etc…)

IC203: I2C BUS SELECTOR
Part Number: SN74LV4053APWR SHARP Code: VHILV4053AT-1Y
The SN74LV4053APWR is a high-speed CMOS analogue multiplexer/demultiplexer backed by silicon gate CMOS technology. The multiplexer function includes the selection and mixing of analogue and digital signals. The chip includes two independent 3 channels selectors. A digital signal through the control terminal turns on the switch of a corresponding channel. This IC is selecting if the Tuner is controlled from VCT-Pro (ATV mode) or from OFDM decoder (DTV mode).
IC1201: NVM OF PC INPUT (EDID)
Part Number: BRC21F SHARP Code:VHIBR24C21F-1Y
This IC is a 2-wire (I2C bus type) serial EEPROM this is electrically programmable. This EEPROM chip stores the data structure used to carry configuration information for optimal use of a display (EDID data).
IC1501: RS-232 TRANSCEPTOR
Part Number: ISL83220 SHARP Code: VHIISL83220-1Y
This ISL83220 is a 3.0V to 5.5V powered RS-232 transceiver (emitter/receiver), +/-15kV ESD protected, with a maximum data rate of 250 kbps.

How to update the software 

VCTPro SOFTWARE UPDATE
There are 4 methods to update software in the VCTpro:
• RS-232C HyperTerminal Method
• RS-232C Tera Term Method
NOTE: (RS-232C method is allowed when the TV is working properly and the action should be only software upgrade)
• I2C Method
• PCMCIA card method (new)

DIGITAL SOFTWARE UPDATE
There are 2 methods to update the Digital Board Software on Flash Memory (IC4203) throught the Digital Processor (IC4001):
• PCMCIA CARD (Compact Flash Memory) Method
NOTE: The PCMCIA method is only compatible with those PCs running XP Windows Version.
• Jig RS-232 WinUpload Method (from PC through RS-232C COM port)

How to enter the service mode

* Press the “POWER” key on the set of running TV set to force off the power.
* While holding down the “VOL (-)” and “INPUT” keys on the set at once, plug in the AC power cord to turn on the power.
 * The letter “K”, appears on the screen.
* Next, hold down the “VOL (-)” and “P (-)” keys on the set at once. Multiple lines of character string appearing on the screen indicate that the set is now in the adjustment Process mode. If you fail to enter the adjustment mode (the display is the same as normal start-up), retry the procedure. (Another procedure)

* To exit the Service Mode, after the adjustment is done, unplug the AC power cord to force off the power. (When the power is turned off with the remote controller, once unplug the AC power cord and plug it in again. In this case, wait 10 seconds before plugging.)

Main Key operation in adjustment process

Main ICs

IC207: COFDM DECODER (Coded Orthogonal Frequency Division Multiplexing)
Part Number : STV0362 SHARP Code: RH-IXB964WJZZQ
The STV0362 is a single-chip demodulator using COFDM and is intended for digital terrestrial receivers using compressed video, sound and data services. It converts IF or base band differential signals to MPEG-2 transport stream format by processing OFDM carriers. The STv0362 is fully compliant with the DVB-T specification (ETS 300 744) and Nor Dig Unifi ed specifi cation.
IC1951: HDMI RECEIVER (High Definition Multimedia Interface)
Part number : Sii9025 SHARP Code : VHISII9025+-1Q
The Sii9025 is a compliant with the latest HDMI 1.2 (High Definition Multimedia Interface) specification. Backward compatibility with DVI 1.0 allows
HDMI systems to connect to existing DVI 1.0 hosts. The SiI9025 is capable of receiving and outputting two channel digital audio at up to 192 kHz an excellent solution for Digital TVs. An S/PDIF port supports up to 192 kHz audio. The SiI9025 also comes pre-programmed with HDCP keys,
greatly simplifying the manufacturing process, while providing the highest level of HDCP key security.
This IC includes the main features shown below

The colors of K letter that shown on the screen when TV is at Inspection Mode are as follows:

Red Grey Light Blue Dark Blue

Picture adjustment: without making adjustments. (SRC or after delete NVM ) Picture adjustment is doing. (SEES) All picture adjustments have been completed. (SEES) The TV has been forced INSPECTION MODE from Panel Control keys (INPUT + VOL▼ + AC ON).  In this mode, the colors classification does not work, and the state or adjustments must be checked directly in results line.

Tuner level adjustment

WB (White Balance adjustment from PC)

W/B ADJUSTMENT FROM PC
1- Get ready the PC with COM port (RS-232C) running on Windows 95/98/ME/2000/XP operating system, as well as the RS-232C cross cable.
2- Start the unit with the RS-232C cable connected.
3- Start the terminal software. (The freeware readily available on the Internet will do.)
4- Make the following settings:

Baud rate Data LENGTH Parity bit Stop bit Flow control

9.600 bps 8 bit None 1 bit None

5- If the settings are correct, the terminal software indicates “ERR” against pressing of the “ENTER” key.
6- After the setting are done correctly, it is possible to make an adjustment by typing in the command shown in the table below and pressing the “ENTER” key on the keyboard.
7- Command entry is successful if the terminal software indicates “OK” when the “ENTER” is pressed. If “ERR” is shown, retry to enter the command.
8- Send the process mode switching command to switch from the RS232C operation mode to the process mode:
KRSW0001: “ERR” is returned.
KKT10037 : When “OK” is returned, the process mode becomes active. When “ERR”, start over from KRSW0001.
9- Send each adjustment command.

List of Commands

HOTEL MODE
How to Enter in the Public Mode (Hotel Mode)
There are three following ways to display the Public Mode setting screen.
1- On the process adjustment mode screen (2/33), set the “HOTEL MODE” Flag to ON.
Turn off the power, and turn it on again, pressing the CH▲ and Vol▲ keys of the main unit at the same time.
2- Enter the Password, and start the unit.
a) Turn on the power, pressing the INPUT and Vol▲ keys of the main unit at the same time.
b) Display the Password input screen.
c) Check the Password by inputting three digits. If the Password is ( 0 2 7) , it shifts to the Public Mode setting screen. In another case, the screen is erased, and it operates in the ordinary mode.

3- By special R/C code: RC table LCD, SYS CORD: 0x78, RC DATA: (HEX) 0xC7, (DEC)199.

After one of sequence before mentioned, the TV will turn on showing the Public Mode set

Exiting the Public Mode screen
There are two following ways to exit the Public Mode setting screen.
1- Turn off the power.
2- Select “Execute” in the Public mode to execute it.

Public mode settings

POWER ON FIXED [VARIABLE FIXED]
When it is set to “FIXED” the TV is impossible to be switch off by Main Switch or Remote Control.
2. MAXIMUM VOLUME [0  60]
Is possible to set the maximum volume at limited level.
3. VOLUME FIXED [VARIABLE  FIXED]
Is possible to fi x the sound volume at limited level.
When “FIXED” is selected the sound volume before limited is fi xed.
4.VOLUME FIXED LEVEL [0  60]
If “FIXED” has been selected, is possible to set a fi xed volume at the level that is chosen.
5. RC BUTTON [RESPOND  NO RESPOND]
If “NO RESPOND” is selected, the remote control keys are inoperative.
6. PANEL BUTTON [RESPOND  NO RESPOND]
If “NO RESPOND” has been selected, the set´s keys remain deactivated (Except POWER key).
7. MENU BUTTON [RESPOND  NO RESPOND]
If “NO RESPOND” has been selected, “MENU” keys on the remote control, is inoperative.
8. ON SCREEN DISPLAY [YES  NO]
If “NO” has been selected, the On Screen Display does not appear.
9. INPUT MODE START [ NORMALTV (X)DTVINPUT1 INPUT2INPUT3  INPUT4  INPUT5 INPUT6  INPUT7]
When any other item than “NORMAL” has been selected, the sets will start in a selected input mode at the next power-on.
10. INPUT MODE FIXED [VARIABLE FIXED]
If “FIXED” has been selected, any channels and input modes other than those selected at the start mode cannot be picked up.
11. RESET
Cancel all Public Mode settings. (It returns to the factory settings)
12. EXECUTE
Select this item, and press cursor RIGHT/LEFT keys on the remote control ir VOL(+) or (--) keys on the LCD TV for confirmation the function settings.

26 Inch Power-Inverter schematic

32 Inch Power supply schematic and 32 Inch Inverter schematic