Technical description and composition of the TOSHIBA 40L3453R TV, type of panel and applicable modules. The composition of the modules.TOSHIBA LED
Model: 40L3453R
Chassis / Version: 17MB95
Panel: VES400UNDS-02-B // VES400UNDS-03
T-CON: S60TVAMB4C2LV0.0; RT6503A, LTF60B0, BM81204
LED driver (backlight): integrated into PSU
PWM LED driver: MP3394
Power Supply (PSU): 17IPS20-R6
PWM Power: FAN6300, FAN7529 (PFC)
MOSFET Power: FQPF9N50C, FQPF8N60C x 2
MainBoard: 17MB95 R3 050413
IC MainBoard: MSD8WB9BX, MX25L1605A, 25Q80, H27U2G8F2CTR, TAS5719
Tuner: SI2156
Control: Remote: CT8035
Specifications 40L3453
TOSHIBA 40L3453R
General repair guidelines for TV LCD LED
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 chance that the 17IPS20-R6 power module is defective and needs repair. Sometimes with similar manifestations a problem can only occur in the absence of standby power. Diagnostics and repair of the common power supply should always begin with a check of the mains fuse and the condition of the electrolytic capacitors of the secondary rectifier filters. Defective and swollen capacitors should be replaced with new ones. If the fuse is broken, it is advisable to check for a breakdown, first of all, all the power semiconductor elements of the converter and the diode bridge of the rectifier network, as well as the large electrolytic capacitor of the filter of the rectifier network.
As a rule, the keys in switching power supplies (SMPS) are reliable enough and rarely fail for no reason to be looked for 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 the TOSHIBA 40L3453R does not have an image, but there is sound, the VES400UNDS-O3 panel backlight LEDs or their power converter, the LED driver, may malfunction.
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.
It is impossible to detect a break in the LED line without disassembling the panel with a simple multimeter. The LEDs are connected in series and to open their transitions, a voltage of several tens of volts is required. Ideally, a current source is suitable for such purposes. You can open the panel and check each LED separately. Typically, Chinese multimeters light up a single 3-volt LED, if you connect the probes in the forward direction to it (red probe to the anode, black to the cathode). In dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of health. In the event of a LED malfunction, its zener diode will either be cut off or broken into short-circuit.
On the motherboard 17MB95 R3 050413, in the event of a malfunction, you should first check the performance of all the stabilizers and power converters of the microcircuits, and also, if necessary, update the software (software).
Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the elements MSD8WB9BX, MX25L1605A, 25Q80, H27U2G8F2CTR, TAS5719. BGA chip malfunctions are usually easy to detect by warming up.
Attention! For users and owners of 40L3453R TVs who do not have the appropriate qualifications, knowledge and experience, we categorically do not recommend attempting self-repair in order to avoid negative consequences that could lead to complete non-repairability of the device.
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Service manual and sсhematic diagram 40PFL3018T/12 Chassis VES2.2E LA
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> 17IPS20 R6 sсhematic diagram
To reduce the backlight current in LED drivers with the MP3394S (MP3394) controller, increase the resistance of the resistor from pin 6 (ISET) to the chassis. The maximum current in each channel (in milliamperes) for the Rset resistor (in kilo-ohms) is determined from the ratio 790 * 1.23V / (Rset + 0.4).Repair MainBoard
The appearance of the MainBoard 17MB95 is shown in the figure below:
17MB95
17MB95 can be used in TVs:
HYUNDAI DLH-32285 (Panel VES315WNDS-01), PHILIPS 40PFL3018T/12 (Panel VES400UNDS-01), PHILIPS 40PFL3008H/12 (Panel VES400UNDS-03), TELEFUNKEN L32H125A3 (Panel VES315WNEA-01-B), TOSHIBA 22L1353R (Panel LM215WF4), TOSHIBA 22L1354R (Panel LM215WF4 TL G1), TOSHIBA 40L1353N (Panel LTA400HM23), TOSHIBA 40L3453R (Panel VES400UNDS-02-B), TOSHIBA 32W3453R (Panel VES315WNDL-01), TOSHIBA 40L5455R (Panel VES400UNVS-3D-N01), TOSHIBA 40L5435 40L5435DG (Panel VES400UNVS-3D-N01).
PSU Advanced
According to the conditions of compliance with modern world standards for household switching power supplies, the 17IPS20-R6 module provides for the use of a Power Factor Correction unit. The PFC circuit is a flyback converter based on the FAN7529 PWM controller. The reactance of an electrolytic capacitor of a line filter at a frequency of 50-60 Hz is usually not more than 20-30 ohms and its charge directly from the network through open diodes could reach tens of amperes per pulse if no filtering were applied.
As a result of the PFC conversion, an increased voltage on the capacitor (about 380V) cannot directly open the rectifier diodes, on the anode of which the voltage will always be slightly less (about 300V) and then its charging current will always be limited by the elements of the PWM controller. As a result, the envelope of the high-frequency pulses of the consumed current will repeat the shape and phase of the input sinusoidal voltage. The presence of an increased voltage (+ 380V) on the network capacitor indicates the serviceability of the PFC node.
The appearance of the power supply
Main features of the TOSHIBA 40L3453R device:
Installed matrix (LED-panel) VES400UNDS-02-B or VES400UNDS-03.
The matrix control uses the Timing Controller (T-CON) S60TVAMB4C2LV0.0 ;.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by the MP3394 PWM controller.
The necessary supply voltages for all nodes of the TOSHIBA 40L3453R TV are generated by the 17IPS20-R6 power supply module or its analogs using FAN6300, FAN7529 (PFC) microchips and power switches of the FQPF9N50C, FQPF8N60C x 2 type.
MainBoard - the main board (motherboard) is a 17MB95 module, using microchips MSD8WB9BX, MX25L1605A, 25Q80, H27U2G8F2CTR, TAS5719 and others.
The SI2156 tuner provides TV reception and channel tuning.
Trademark: TOSHIBA, Model: 40L3453.
Briefly from the TV: LCD, LED backlight, 40 ", 1920x1080, 1080p Full HD, sound: 20W, HDMI: 3, Internet access, Wi-Fi, Smart TV.
For the 40L3453DB model, the official website has firmware (software update) version V3.5.5F.
The composition uses MainBoard 17MB95 R3 050413 and the LCD panel (matrix) VES400UNDS-02-B, or VES400UNDS-03.
Power Supply Unit (PSU) 17IPS20-R6 Power Supply.
TOSHIBA 40L3453 LED TV with VES400UNDS-02-B LCD, 40 "(102 cm) diagonal size 16: 9 format. The required screen brightness of 300 cd / m² is provided by LED backlight LED. The LCD panel uses backlight from Direct LEDs: 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 decomposition standard 1080p (Full HD).
The 40L3453 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, DivX, MKV, JPEG.
The power of the sound system 20 W (2x10 W) provides 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), audio x2, component, SCART, RGB, VGA, HDMI x3, USB, Ethernet (RJ-45), Wi-Fi, WiDi. 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, 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 113 watts.
Overall dimensions: with stand 930x610x240 mm, without stand 930x560x105 mm.
TV mass: 13.5 kg.
Attention! The VES400UNDS-02-B panel of the TOSHIBA 40L3453 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.