Technical description and composition of the TOSHIBA 32L2353RB TV, type of panel and applicable modules. The composition of the modules.TOSHIBA LED
Model: 32L2353RB
Chassis / Version: L2300
Panel: T320HVN04.0 / LSC320HN03-T01
LED backlight: SVT320AE9_Rev1.0_121012
T-CON: 32T37-C00
LED driver (backlight): UE3790-01UN-LF TC24433A
PWM LED driver: OZ9908AGN
Power Supply (PSU): TC24433A - UE3790-01UN-LF
PWM Power: FAN6754MRMY, IN1M101
MainBoard: L2300 MB01709-60EB40M1GB01P
IC MainBoard: MSD8841BX-VW, W25Q64FVSIG, H5TQ2G63DFR-PBV, MSB1230-LF, 25LD020, MSG1200, TAS5707, DRV632
Tuner: TDSY-G230D
Control: Remote: CT-90326, IR: L2300_IR Rev1.03A
Specifications 32L2353
TOSHIBA 32L2353RB
General repair guidelines for TV LCD LED
TOSHIBA 32L2353RB TV, like many other electronic devices, it is advisable to start repairing with an inspection of all external and internal elements. Often, based on certain external signs, it may be possible to draw certain conclusions about the reasons for the failure of certain elements of the circuit even before the necessary measurements are made, which will determine the further algorithm for troubleshooting and localizing the defect. In most cases, the repairman can guess the causes of the defect and possible consequences from the characteristic signs of typical TV defects, for example, ring cracks formed in the soldering of the element leads, swollen rectifier filter capacitors, charred resistors and other circuit elements.
If the TV does not turn on, no indicators on its front panel are lit or blinking. Also, if the TV does not respond to the remote control and buttons, does not make any sounds or any signs of operability when it is turned on, there is a certain probability that the TC24433A UE3790-01UN-LF power module is defective and needs repair. Sometimes a similar manifestation may occur only in the absence of processor power, which is typical for certain TOSHIBA models. When diagnosing and repairing the power supply, first of all, replace the swollen filter capacitors of the secondary rectifiers and check the fuse and, if it is broken, it is necessary to identify the cause. Often in such cases, an avalanche (thermal) breakdown is detected in the power semiconductor elements of the module — rectifier diodes and transistors in the primary circuit.
Mos-Fet keys used in switching power supplies (SMPS) rarely fail for no reason to look for when checking other circuit elements. Often the breakdown is caused by malfunctions of electrolytic capacitors or semiconductor elements in the primary circuit, or by a break in the resistors in the stabilization circuits. The PWM controller chip FAN6754MRMY, IN1M101 can also cause a breakdown of the power switch of the converter.
In cases where the TOSHIBA 32L2353RB TV has lost an image, and the sound is there and all other functions are operational, there is a possibility of a malfunction of the LED driver (a converter for powering the T320HVN04.0 backlight LEDs). When you turn on the TV, the image may appear briefly and disappear immediately. It must be borne in mind that with such manifestations the LEDs themselves also fail.
Often in the absence of backlighting, disassembling the panel is required. It is necessary to check the serviceability of the transitions of the LEDs, as well as the reliability of the contact connections in the rulers and connectors.
To check the LED lines for breaks without disassembling the panel, for example, a current source will help. It is impossible to open series-connected PN junctions with a simple multimeter, a voltage of the order of several tens of volts is required.
When trying to repair the motherboard, you should first check the serviceability of linear stabilizers or power converters of microcircuits and, if necessary, update the software (software).
Attention to the owners! Attempts to self-repair the TOSHIBA 32L2353RB TV are not recommended by the manufacturer and can lead to serious negative consequences!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Toshiba chassis L2300 Service manual and schematic diagram
FIRMWARE FOR SPI FLASH -----------> Toshiba 32L2353RB , Panel: LSC320HN03-TO1
Service mode: Menu - Applications - Sleep timer - Ok. input 2766 (__:_0).
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 32L2353RB device:
Installed matrix (LED-panel) T320HVN04.0 / LSC320HN03-T01.
The matrix control uses the Timing Controller (T-CON) 32T37-C00.
To power the backlight LEDs, the UE3790-01UN-LF LED driver is used, controlled by the OZ9908AGN PWM controller.
The necessary supply voltages for all nodes of the TOSHIBA 32L2353RB TV are generated by the TC24433A power module or its analogs using FAN6754MRMY, IN1M101 microcircuits.
MainBoard - the main board (motherboard) is an L2300 module, using microchips MSD8841BX-VW, W25Q64FVSIG, H5TQ2G63DFR-PBV, MSB1230-LF, 25LD020, MSG1200, TAS5707, DRV632 and others.
The TDSY-G230D tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: AUO
Model: T320HVN04.0 CELL
Type: a-Si TFT-LCD, CELL
Diagonal size: 31.5 inch
Resolution: 1920x1080, FHD
Display Mode: AMVA, Normally Black, Transmissive
Active Area: 698.4x392.85 mm
Surface: Antiglare (Haze 2%), Hard coating (3H)
Glass Depth: 0.50 + 0.50 mm
Transmissivity: 4.5% (with Polarizer)
Contrast Ratio: 4000: 1
Display Colors: 1.06B (8-bit + FRC)
Response Time: 6.5 (G to G)
Frequency: 60Hz
Signal Interface: LVDS (2 ch, 10-bit), 51 pins
Voltage: 12.0V
Brand: TOSHIBA, Model: 32L2353.
Short from the TV: LCD, LED backlight, 32 ", 1920x1080, 1080p Full HD, sound: 14 watts.
The composition uses MainBoard L2300 60EB40M1GB01P and LCD panel (matrix) T320HVN04.0 (LSC320HN03-T01).
Power Supply Unit (PSU) TC24433A - UE3790-01UN-LF Power Supply.
TOSHIBA 32L2353 LED TV with T320HVN04.0 LCD, 32 "(81 cm) diagonal size of 16: 9 format. The required screen brightness of 300 cd / m² is provided by LED backlighting. This model uses side backlighting from Edge LEDs The design and technical capabilities of the TV include viewing programs and movies in high quality HD at a resolution of 1920x1080 pixels in graphic decomposition according to the standard 1080p (Full HD). The input high-frequency or video signal can be processed in analog systems PAL, SECAM, NTSC. and the formation of a digital signal is in 480i standards, 480p, 576i, 576p, 720p, 1080i, 1080p Supported multimedia 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), S-Video, component, SCART, HDMI, 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, 1280x1024, 1360x768.
A digital tuner is capable of receiving television channels in the DVB-T, DVB-C, DVB-T2 standards.
The power consumed by the TV in the operating mode from the network is 65 watts.
Overall dimensions: with stand 736x504x180 mm, without stand 736x439x85 mm.
TV Weight: with stand: 6 kg, without stand: 5.2 kg.
Attention! The T320HVN04.0 (LSC320HN03-T01) panel of the TOSHIBA 32L2353 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.