TOSHIBA LED
Model: 39L4353RB
Chassis / Version: L4300
Panel: T390HVN01.0 / XL
LED backlight: SVT390A05_L_Rev 3.0_121114
T-CON: T390HVN01.0
LED driver (backlight): integrated into PSU
PWM LED driver: OB3362T // OB3372KP
Power Supply (PSU): B191-101 4H.B1910.011 E DARFON
PWM Power: FAN7930C (PFC), IN1M101, FSB127H (Standby), SSC9522S
MOSFET Power: P0550ATF, P1060ATF
MainBoard: 32L4300 Rev1.02A
IC MainBoard: CPU: MSD8881CV-W9N; DRAM: H5TQ2G63DFR; NAND Flash: THGBM4G4D1HBAIR; SPI Flash: / W25Q16CVSSIG;
Tuner: TDSS-G231D
Control: Remote: CE-90429, Wifi: 1353A-WLU5053 WLU5053-D4, IR: LV2_IR
Specifications 39L4353
TOSHIBA 39L4353RB
General repair guidelines for TV LCD LED
The TOSHIBA 39L4353RB TV, like many other electronic devices, it is advisable to start repairing by inspecting all external and internal elements. In some cases, visible external damage to the elements can suggest the direction of troubleshooting and localization of the defect even before the start of the necessary measurements at the control points of the nodes of electronic circuits. Elements with visible damage, for example, capacitors swelled up after boiling the electrolyte, charred resistors in certain nodes of the circuit, as well as ring cracks in solders will help the master to guess the causes and possible consequences of the malfunction.
If the 39L4353RB TV does not turn on, does not make any sounds when it is turned on, and also no indicators light up or blink on the front panel, there is a high probability of a malfunction in the power module. In some cases, only the regulator or power converter of the control processor may be faulty, which is typical for some TOSHIBA models. In the absence of swollen filter capacitors of the secondary rectifiers, the diagnostics of the power supply should be started by checking the fuse and, if it is broken, it is first necessary to check all the power semiconductor elements of the primary circuit - diodes and transistors for the possibility of an avalanche or thermal breakdown.
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 can also cause a breakdown of the power switch of the converter.
If the TOSHIBA 39L4353RB has no image, there is sound and the channels are switched, there is a possibility of a malfunction in the backlight LED circuit of the T390HVN01.0 XL panel, or their power converter - LED drivers. Sometimes when you turn on the image appears and disappears immediately. In such cases, it is necessary to check the electrolytic capacitors of the power filter of the LED driver itself, including in the secondary rectifier of the main PSU.
Often there is a need for disassembling the panel to check the health of the LEDs, as well as contact connections in the connectors and soldering.
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.
The 32L4300 Rev1.02A motherboard is subject to verification if there is no reaction to the remote control and function buttons, the standby indicator blinks or lights up continuously. In such cases, if the converters or power regulators of the microcircuit are working, a software update may be necessary.
Before replacing the TDSS-G231D tuner, if there is no tuning to the channels, you must first check the supply voltage at its terminals, including the power supply of varicaps (30-33V).
Remember! Attempts to self-repair by users of the TOSHIBA 39L4353RB TV without the appropriate 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
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)).
PSU Advanced
The 39L4353RB model uses a B191-101 power supply unit using the PFC (Power Factor Correction) node - an active filter of the highest harmonics of the current consumption. In fact, it is a boost converter based on the FAN7930C PWM controller, which eliminates the charge current of the rectifier filter's electrolytic capacitor directly from the network through open diodes when its charging current is determined by its reactance.
As a result of the operation of the converter, the envelope of the high-frequency pulses of the input current of the converter will repeat the shape and phase of the input voltage. The health of the PFC node can be indirectly judged by the presence of an increased constant voltage (about + 380V) on the capacitor of the rectifier network in operating mode.
Main features of the TOSHIBA 39L4353RB device:
Installed matrix (LED-panel) T390HVN01.0 / XL.
The matrix control uses the Timing Controller (T-CON) T390HVN01.0.
To power the backlight LEDs, a converter is used, combined with a power supply unit, controlled by the OB3362T // OB3372KP PWM controller.
The necessary supply voltages for all nodes of the TOSHIBA 39L4353RB TV are generated by the power supply module B191-101, or its analogues using FAN7930C (PFC), IN1M101, FSB127H (Standby), SSC9522S microcircuits and power switches of the type P0550ATF, P1060ATF.
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: T390HVN01.0
Type: a-Si TFT-LCD, Panel
Diagonal size: 39 inch
Resolution: 1920x1080, FHD
Display Mode: AMVA, Normally Black, Transmissive
Active Area: 853.92x480.33 mm
Surface: Antiglare (Haze 2%), Hard coating (3H)
Brightness: 350 cd / m²
Contrast Ratio: 3000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 6.5 (G to G)
Frequency: 60Hz
Lamp Type: 8 pcs CCFL Embedded (Balance board)
Signal Interface: LVDS (2 ch, 10-bit), 51 pins
Voltage: 12.0V
TOSHIBA 39L4353 LED TV with T390HVN01.0 LCD, 39 "(99 cm) diagonal size in 16: 9 format. The required screen brightness of 300 cd / m² is provided by LED backlighting. LED display technology is implemented in this model The design and technical capabilities of the TV include watching programs and movies in high quality HD at a resolution of 1920x1080 pixels in a graphical resolution according to the standard 1080p (Full HD).
The 39L4353 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 138 watts.
Overall dimensions: with stand 891x590x200 mm, without stand 891x525x85 mm.
TV Weight: with stand: 8 kg, without stand: 7 kg.
Attention! The T390HVN01.0 / XL panel of the TOSHIBA 39L4353 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.