Technical description and composition of the TOSHIBA 32L4353RB TV, type of panel and applicable modules. The composition of the modules.TOSHIBA LED
Model: 32L4353RB
Chassis / Version: L4300
Panel: T320HVN04
LED driver (backlight): integrated into PSU
PWM LED driver: OZ9908AGN
Power Supply (PSU): UE-3121-01 UNLF 310240TK REV: 01
PWM Power: A6069H, NCP1608B, SSC9522S
MOSFET Power: K6A60DR
MainBoard: 32L4300 0409-00D80TB
IC MainBoard: CPU: MSD8881CV-W9N; DRAM: H5TQ2G63DFR; NAND Flash: THGBM4G4D1HBAIR; SPI Flash: / W25Q16CVSSIG
Tuner: TDSS-G231D
Control: CT-90429
Specifications 32L4353
TOSHIBA 32L4353RB
General repair guidelines for TV LCD LED
TOSHIBA 32L4353RB TV, like many other electronic devices, it is advisable to start repairing by inspecting all external and internal elements. According to some external signs of a change in the state of some elements, it is sometimes possible to make assumptions about the nature of the defect, as well as determine the further direction of the troubleshooting. In some cases, faulty elements can be seen with the naked eye, for example, charred resistors or swollen metal-ceramic capacitors, or electrolytic in rectifier filters. Ring cracks formed in the soldered terminals of transformers or heating elements of the circuit are also frequent sources of many malfunctions with a variety of external manifestations.
In the absence of any signs of operability, when the TOSHIBA 32L4353RB does not turn on and does not signal anything with the control lights on the panel, there is a possibility of a malfunction of the TV power module. With the same manifestations, the power regulator of the control processor on the motherboard may be faulty. When repairing the power supply, it is advisable to start the diagnostics by checking the mains fuse and the electrolytic capacitors of the filters of the converter secondary rectifiers. In the event of a fuse breaking, the reason should be sought in the power semiconductor elements of the pulse converter of the main power supply. First of all, it is necessary to check the diodes of the bridge of the rectifier of the mains voltage and the power switch (s) of the converter.
It should be remembered that in the practice of repair, usually the power switches in switching power supplies (SMPS) do not fail due to their poor quality and, in such cases, it is necessary to look for the cause that led to a malfunction and provoked a breakdown of the key. Most often, the culprits of the accident are dried electrolytic capacitors or dangling resistors in the primary circuit, or the PWM controller chip itself may be faulty. It is also necessary to check all the semiconductor elements of the stabilization circuit in the primary and secondary circuits.
If, when you turn on the TV, the image appears and immediately disappears, or is initially absent when you turn on, but the sound is there and other functions work, there is a high probability of a malfunction of the LED driver (T320HVN04.0 panel backlight LED power converter). In such cases, the general power module is also subject to verification, in which the electrolytic capacitors of the rectifier filter supplying the LED driver should be checked.
In most cases of lack of backlight, it becomes necessary to disassemble the panel in order to check the LEDs, connectors, loops and all contact connections. If one or several LEDs does not work in one line, therefore, they are broken and should be replaced.
It should be remembered that it is not possible to determine the open circuit in the LED lines without disassembling the panels with a tester or multimeter without an additional device, for example, a current source. To open all PN junctions connected in series at once, a voltage of several tens of volts may be required.
In some cases, to repair the MB board (SSB), it may be necessary to replace the chips - P / N 75036189 with new or obviously good ones. In cases where BGA technologies are used, defects are usually localized by the heating method.
Remember! Attempts by users to repair the TOSHIBA 32L4353RB TV without proper qualifications and necessary experience can lead to serious negative consequences!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Toshiba 32L4332/L4333, 39/50/L4333, 32/39/50/L4353, 32/39/50/L4363, 40/50/L6353, 40/50/L6363, 40/50/58/L7333, 40/50/58/L7353, 40/50/58/L7363, Chassis L4300
FIRMWARE FOR SPI FLASH -----------> Toshiba 32L4353RB, main: 32L4300
Service Manuals with Schematic Diagrams 110 pages of 2013 on models -----------> 32L4332, 32L4333, 39L4333, 50L4333, 32L4353, 39L4353, 50L4353, 32L4363, 39L4363, 50L4363, 40L6353, 50L6353, 40L6363, 50L6363, 40L7333, 50L7333, 58L7333, 40L7353, 50L7353, 58L7353, 40L7363, 50L7363, 58L7363
The appearance of the MainBoard 32L4300 is shown in the figure below:32L4300
32L4300 can be used in TVs:
TOSHIBA 32L4353RB (Panel T320HVN04), TOSHIBA 39L4353RB (Panel T390HVN01.0 / XL), TOSHIBA 40L6353RK (Panel LSC400HM06 T01), TOSHIBA 40L7356RK (Panel LSC400HF03 T01), TOSHIBA 40L7363RK (Panel LSC400HF03 T01), TOSHIBA 50L7363RK (Panel 50 inch), TOSHIBA 32L6353RK (Panel 96.32S14.001), TOSHIBA 39L4363D (Panel T390HVN01.0 XL), TOSHIBA 50L4353RK (Panel LC500DUE (SF)(R1)).
The appearance of the power supply
Main features of the TOSHIBA 32L4353RB device:
Installed matrix (LED-panel) T320HVN04.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by the OZ9908AGN PWM controller.
The necessary supply voltages for all nodes of the TOSHIBA 32L4353RB TV are generated by the power module UE-3121-01, or its analogs using A6069H, NCP1608B, SSC9522S microcircuits and K6A60DR type power switches.
MainBoard - the main board (motherboard) is a 32L4300 module using CPU chips: MSD8881CV-W9N; DRAM: H5TQ2G63DFR; NAND Flash: THGBM4G4D1HBAIR; SPI Flash: / W25Q16CVSSIG and others.
The TDSS-G231D tuner provides television 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
TOSHIBA 32L4353 LED TV with T320HVN04 LCD, 32 "(81 cm) diagonal 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. Design and the technical capabilities of the TV include watching programs and movies in high quality HD at a resolution of 1920x1080 pixels in the graphic resolution of the standard 1080p (Full HD).
The 32L4353 is equipped with SMART software, integrated applications and the ability to work on the Internet. Connecting to the Internet can be done via Wi-Fi. The 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, Xvid, DivX, MKV, JPEG.
The power of the speaker system of sound 14 W (2x7 W) provide two speakers. The audio processing system NICAM STEREO is used.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, component, SCART, RGB, VGA, HDMI x4, MHL, USB x2, Ethernet (RJ-45), Wi-Fi, WiDi, Miracast. 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 86 watts.
Overall dimensions: with stand 736x504x180 mm, without stand 736x439x85 mm.
TV Weight: with stand: 6.5 kg, without stand: 5.8 kg.
Attention! The T320HVN04 panel of the TOSHIBA 32L4353 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.