Technical description and composition of the TOSHIBA 40L1353N TV, type of panel and applicable modules. The composition of the modules.TOSHIBA LED
Model: 40L1353N
Chassis / Version: 17MB95-2.1
Panel: LTA400HM23
LED backlight: SSL400_WP01
LED driver (backlight): SSL400_0D5A REV1.0
PWM LED driver: TR10E1
MOSFET LED driver: SF10A400HD
Power Supply (PSU): 17PW07-2
PWM Power: FAN7621, FAN7529 (PFC), FSDL321 (Stb), NCP1579 (Step-Down)
MOSFET Power: FQPFN50C, AO4842
MainBoard: 17MB95-2.1
IC MainBoard: NAND Flash: H27U2G8F2CTR; SPI FLASH: MX25L1605A, W25Q80
Specifications 40L1353
TOSHIBA 40L1353N
General repair guidelines for TV LCD LED
In cases where the TOSHIBA 40L1353N TV does not turn on, does not respond to the remote control and buttons, any indicators on the front panel do not light up or blink, and there are no sounds and no signs of operability when turning on, the power module is most likely to be faulty. If the mains fuse is broken, it is necessary to check first of all the power semiconductor elements - rectifier diodes and transistors, which can often be detected in a breakdown state in such situations. Mos-Fet keys used in switching power supplies (SMPS) rarely fail for no reason, so it makes sense to check other elements of the circuit. The PWM controller chip can also sometimes cause a breakdown of the power switch of the converter.
If the TOSHIBA 40L1353N does not have an image, but there is sound, the backlight LEDs of the LTA400HM23 panel or their power converter may malfunction. You should also make sure that the electrolytic capacitors of the secondary rectifiers of the common power supply are working.
To check the health of the LEDs and contact connections in their power circuit, the panel must be disassembled.
To detect a break in the LED lines without disassembling the panel, a current source is required. It is impossible to open transitions connected in series with a simple multimeter; voltage of several tens of volts is necessary.
Repair of the 17MB95-2.1 motherboard must begin with the diagnosis and verification of all converters (PWM) and linear power supply stabilizers of its microcircuits. Sometimes it may be necessary to update the software (software), in some cases, if the software downloader crashes, you will need to upgrade the SPI FLASH or EEPROM.
When repairing an MB board, you need to check its NAND Flash components: H27U2G8F2CTR; SPI FLASH: MX25L1605A, W25Q80. Defective items should be replaced. A malfunction of BGA chips is usually localized by warming up.
If the display backlight is OK but there is no image, you need to check the power supply voltage of the LCD panel directly on the LVDS connector.
Owners and users of the TOSHIBA 40L1353N TV must remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!
Typical problems associated with the lack of image TOSHIBA 40L1353N arise in connection with the problem LED panel LTA400HM23 manufacturer Samsung.
External manifestations: no image, sometimes appears, but disappears again.
In most of these cases, panel repair is possible and widely practiced by repairmen. Faulty LEDs must be replaced and duplicated contacts duplicated by conductors. For prevention purposes, it is advisable to duplicate all contact connections between the LED strips.
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Toshiba - Vestel Main 17MB95-2
The appearance of the MainBoard 17MB95-2.1 is shown in the figure below:17MB95-2.1
17MB95-2.1 can be used in TVs:
PHILIPS 40PFL3018T/12 (Panel VES400UNDS-01), TELEFUNKEN L32H125A3 (Panel VES315WNEA-01-B), TOSHIBA 22L1353R (Panel LM215WF4), TOSHIBA 22L1354R (Panel LM215WF4 TL G1), TOSHIBA 40L1353N (Panel LTA400HM23).
The appearance of the power supply
Main features of the TOSHIBA 40L1353N device:
Installed matrix (LED-panel) LTA400HM23.
The LED driver SSL400_0D5A is used to power the backlight LEDs, it is controlled by the TR10E1 PWM controller. As the power elements of the LED driver, keys of the type SF10A400HD are used.
The necessary supply voltages for all nodes of the TOSHIBA 40L1353N TV are generated by the 17PW07-2 power supply module or its analogs using FAN7621, FAN7529 (PFC), FSDL321 (Stb), NCP1579 (Step-Down) microcircuits and power switches of the FQPFN50C, AO4842 type.
MainBoard - the main board (motherboard) is a 17MB95-2.1 module, using NAND Flash chips: H27U2G8F2CTR; SPI FLASH: MX25L1605A, W25Q80 and others.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTA400HM23
Type: a-Si TFT-LCD, Panel
Diagonal size: 40 inch
Resolution: 1920x1080, FHD
Display Mode: S-PVA, Normally Black, Transmissive
Active Area: 885.6x498.15 mm
Surface: Antiglare (Haze 5.5%), Hard coating (2H)
Brightness: 300 cd / m²
Contrast Ratio: 5000: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 70%
Response Time: 8 (G to G)
Frequency: 60Hz
Lamp Type: WLED Embedded (LED Driver)
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V
Brand: TOSHIBA, Model: 40L1353.
Briefly from the TV: LCD, LED backlight, 40 ", 1920x1080, 1080p Full HD, sound: 16W, HDMI: 3, Internet access.
The official Toshiba website has firmware (software update) for the models 40L1353N (2.1.9z), 40L1353DB (2.1.9z), 40L1353B (2.1.9z).
The composition uses MainBoard 17MB95-2.1 and an LCD panel (matrix) LTA400HM23.
Power Supply Unit (PSU) 17PW07-2 Power Supply.
TOSHIBA 40L1353 LED TV with an LTA400HM23 LCD display, 40 "(102 cm) diagonal size in 16: 9 format. The required screen brightness of 300 cd / m² is provided by LED backlighting. This model uses side backlighting from Edge LEDs. Design and the TV’s technical capabilities include watching broadcasts and movies in high quality HD with a resolution of 1920x1080 pixels in graphic resolution according to the standard 1080p (Full HD) .The input high-frequency or video signal can be processed in analogue 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, JPEG.
The power of the sound system 16 W (2x8 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), AV, component, SCART, RGB, VGA, HDMI x3, USB x2, Ethernet (RJ-45). 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, 1920x1080.
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 110 watts.
Overall dimensions: with stand 934x602x249 mm, without stand 934x560x98 mm.
TV Weight: with stand: 15.5 kg, without stand: 12.5 kg.
Attention! The LTA400HM23 panel of the TOSHIBA 40L1353 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.