Technical description and composition of the TOSHIBA 32W2353RB TV, type of panel and applicable modules. The composition of the modules.Toshiba
Model: 32W2353RB
Chassis / Version: x2353
Panel: LSC320AN02-T 01 // 96.32S03.004
T-CON: 6870C-0442B 32.37 ROW2.1 HD VER0.1 TPS65175 TL2357ML
Power Supply (PSU): UE-3790-01UN-LF TC24433B
Mainboard: L2300
IC MainBoard: CPU: MSD8841BX-VW; SPI Flash: 25Q64;
Tuner: TDSY-G230D
Specifications 32W2353
TOSHIBA 32W2353RB
General recommendations for repairing TV LCD
TOSHIBA 32W2353RB TV, like any other, it is advisable to start repairing it by inspecting the internal and external visible physical visual changes. Often, by the external signs and nature of some damage, it is possible to draw preliminary conclusions and determine a further algorithm for troubleshooting. In most cases, the repairman can guess the causes of the defect and possible consequences by the characteristic signs of typical TV defects, for example, ring cracks formed in the soldering of element leads, swollen rectifier filter capacitors, charred resistors and other circuit elements.
In cases when the TOSHIBA 32W2353RB TV does not turn on, does not respond to the remote control and buttons, no indicators on the front panel light up or blink, and there are no sounds and no signs of operability when turning on, the UE-3790-01UN power supply module is most likely faulty -LF TC24433B or, which is much less common, there is no processor power on the motherboard. In this case, first of all, it is necessary to check the fuse at the mains input. If it is broken, then you should check for breakdown of the PN junctions of the rectifier bridge diodes and the key transistor of the N-FET converter, which can either be on a separate radiator or integrated with a PWM controller in a common chip. Possible options.
As a rule, the keys of flyback converters, which use an N-Fet field effect transistor on a separate radiator, or integrated with a PWM controller in a single chip, are reliable enough and rarely fail for no reason. The reasons for the breakdown of the key should be sought by checking other components of the circuit - electrolytic capacitors, resistors and semiconductor elements of the primary circuit. The PWM chip is verified by replacing it with a known good one.
If an active Power Factor Corrector (PFC) is used in the power module circuitry, it is sometimes more difficult to troubleshoot. Knowledge, experience, intuition and skills in such cases have a great advantage for a successful repair.
Sometimes the TOSHIBA 32W2353RB TV does not have an image, but there is sound, or the image appears and immediately disappears. In this case, there is a high probability of a malfunction of the backlight converter, or of the lamps themselves, which can be checked by replacement. In such cases, it is necessary to verify the serviceability of all electrolytic capacitors of the filter according to the power supply of the inverter itself, including in the power supply unit (power supply unit).
The operation of the power circuits of the inverter and the backlight in the normal mode are controlled by special protection, which is organized for fire safety, for example, to disconnect during short circuits or breaks in high-voltage connections or when the lamps are depressurized. This protection makes it difficult to diagnose and repair the inverter.
In such cases, special care should be taken during diagnostics, and after completion of all repair work, it is necessary to restore the circuit and the inverter protection for further safe operation of the TV.
Before replacing the TDSY-G230D tuner, if there is no tuning for the channels, first you need to check the supply voltage at its terminals, including the varicap supply (30-33V).
It should be remembered! Attempts to repair the TOSHIBA 32W2353RB TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Toshiba chassis L2300 Service manual and schematic diagram
The appearance of the MainBoard L2300 is shown in the figure below:L2300
L2300 can be used in TVs:
TOSHIBA 32L2353RB (Panel T320HVN04.0 / LSC320HN03-T01), TOSHIBA 32W2353RB (Panel LSC320AN02-T 01), TOSHIBA 39L2353RB (Panel T390HVN01 / 96.39S02.002), TOSHIBA 50L2353RK (Panel LC500DUE SFR1), TOSHIBA 40L2453RK (Panel UNV4031Y 1823-01XU0TB), TOSHIBA 32L2454RB 32L2453RB (Panel LC320EUJ (FF)(E2)), TOSHIBA 40L2454RK (Panel UNV4031Y 1823-01XU0TB).
Main features of the TOSHIBA 32W2353RB device:
Installed matrix (LCD panel) LSC320AN02-T 01 or 96.32S03.004.
The matrix control uses the Timing Controller (T-CON) 6870C-0442B.
The formation of the necessary supply voltage for all nodes of the TOSHIBA 32W2353RB TV is carried out by the power module UE-3790-01UN-LF, or its analogues.
MainBoard - the main board (motherboard) is an L2300 module, using CPU chips: MSD8841BX-VW; SPI Flash: 25Q64; and others.
The TDSY-G230D tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LSC320AN02-T
Type: a-Si TFT-LCD, CELL
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: SVA, Normally Black, Transmissive
Active Area: 697.685x392.256 mm
Surface: Antiglare (Haze 2.3%), Hard coating (2H)
Glass Depth: 0.70 + 0.70 mm
Contrast Ratio: 5000: 1
Display Colors: 16.7M (8-bit), CIE1931 68%
Response Time: 20 (G to G)
Frequency: 60Hz
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
TOSHIBA 32W2353 LED TV with LSC320AN02-T LCD, 32 "(81 cm) diagonal size in 16: 9 format. The required screen brightness of 300 cd / m² is provided by LED backlighting. The ratio of maximum brightness to minimum (contrast) is 1200 : 1. Dynamic contrast ratio of 3000000: 1 is achieved by special control of the LEDs. This model uses side LED backlighting from Edge LEDs. You can view images in high quality HD at a resolution of 1366x768 pixels in the standard of graphic decomposition 720p (HD Ready). Input high frequency or video signal can be processed in analogue systems PAL, SECAM, NTSC. Graphic processing and digital signal generation occurs in standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p. Supported media file formats: MP3, WMA, MPEG4, DivX , MKV, JPEG.
The power of the speaker system of sound 14 W (2x7 W) provide two speakers. It uses a NICAM stereo signal processing system and Sound Surround.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), component, SCART, HDMI x2, MHL, USB. An output for connecting headphones is provided. To connect a computer or laptop to this TV model, a VGA (D-Sub 15) connector is used on the TV case, this interface supports resolutions: 640x480, 800x600, 1024x768, 1360x768.
A digital tuner is capable of receiving television channels in the DVB-T MPEG4, DVB-C, DVB-T2 standards.
The power consumed by the TV in the operating mode from the network is 63 watts.
Overall dimensions: with stand 736x504x180 mm, without stand 736x439x85 mm.
TV Weight: with stand: 6 kg, without stand: 5.2 kg.
Attention! The LSC320AN02-T 01 panel of the TOSHIBA 32W2353 LED TV is an expensive and unreliable element.
Avoid any impact on the glass and pressure on the surface of the screen to avoid damage to the LED panel!
It is also unsafe to get liquid on the screen. Sometimes one drop is enough if it flows down the glass onto the cables so that the TV becomes unrepairable.