Technical description and composition of the TOSHIBA 46TL838R TV, type of panel and applicable modules. The composition of the modules.TOSHIBA LED
Model: 46TL838R
Panel: LTA460HW02 T01
LED driver (backlight): SSL460_3E2T
PWM LED driver: SSL100SN
MOSFET LED driver: A2126 STB4175 STB10200D1
Power Supply (PSU): FMB4190407602
PWM Power: A6069H
MOSFET Power: K12A50D,
Mainboard: PE1000
IC MainBoard: CPU: MSD388USV-V6; DRAM: K4B1G1646G-BCK0; NAND Flash: TC58NVG1S3ETA00BKH; SPI Flash: MX25L1606EM2I-12G, EN25F20-100GIPTY;
Tuner: ENGS7305F
Specifications 46TL838
TOSHIBA 46TL838R
General repair guidelines for TV LCD LED
TOSHIBA 46TL838R, like other televisions, it is advisable to start repairing with a careful examination of the external and internal elements and modules. 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. Swollen electrolytic or cermet capacitors, charred resistors, ring cracks in the soldered terminals of the elements - all this can significantly help the master to determine the causes and consequences of the malfunction of the TV.
If the power supply module FMB4190407602 is malfunctioning, external manifestations may be different, for example, the TOSHIBA 46TL838R does not turn on at all and there is no indication of the indicator lights on the front panel. With the same symptoms, the stabilizer (converter) of the power supply to the control processor may be faulty. 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 - K12A50D diodes and transistors, for the possibility of an avalanche or thermal breakdown.
The reasons for the breakdown of the power switch in pulsed power supplies (IIPS) can be different, for example, a malfunction of semiconductor cells or electrolytic capacitors in the stabilization circuits of the primary circuit, as well as a failure in the operation of the A6069H PWM controller chip or broken resistors in its wiring.
In cases where the TOSHIBA 46TL838R TV has lost an image, and the sound is there and all the other functions are functional, there is a possibility of a malfunction of the LED driver (converter for powering the backlight LEDs of the LTA460HW02 T01 panel). 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.
It is impossible to check the LED line for breaks without disassembling the panel with a multimeter or tester. For these purposes, it is necessary to open all series-connected PN junctions and a voltage of the order of tens of volts will be required, and ideally, a current source.
In cases of attempts to repair the PE1000 motherboard, it is necessary to check the operability of the stabilizers or power converters of its microcircuits and, if possible, update the software (software). BGA chips can in most cases be diagnosed by local heating.
In cases of complex repairs of MB (SSB) and in the presence of the necessary skills and equipment, sometimes it may be necessary to replace its TAS5708 chips and other possible faulty components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
If you suspect a malfunction of the ENGS7305F tuner, first of all, you need to make sure that the voltage of the varicaps (30-33V) is present on the corresponding output of the tuner, as well as other voltage supplying it.
Owners of the 46TL838R TV are recommended for repairs to contact only qualified specialists with experience! Self-repair attempts without the appropriate knowledge and skills can lead to serious negative consequences!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> 32/40/46TL838/868 main PE1000ZA
The appearance of the MainBoard PE1000 is shown in the figure below:
PE1000
PE1000 can be used in TVs:
TOSHIBA 40TL838R (Panel LTA400HV01), TOSHIBA 46TL838R (Panel LTA460HW02 T01), TOSHIBA 32TL838R (Panel LTA320HW01 1080p Full HD).
Main features of the TOSHIBA 46TL838R device:
Installed matrix (LED panel) LTA460HW02 T01.
The LED driver SSL460_3E2T is used to power the backlight LEDs, it is controlled by the SSL100SN PWM controller. As the power elements of the LED driver, keys of the type A2126 STB4175 STB10200D1 are used.
The necessary supply voltages for all nodes of the TOSHIBA 46TL838R TV are generated by the FMB4190407602 power supply module or its analogs using A6069H microchips and K12A50D type power switches,.
MainBoard - the main board (motherboard) is a PE1000 module, using CPU chips: MSD388USV-V6; DRAM: K4B1G1646G-BCK0; NAND Flash: TC58NVG1S3ETA00BKH; SPI Flash: MX25L1606EM2I-12G, EN25F20-100GIPTY; and others.
The ENGS7305F tuner provides television reception and channel tuning.
Technical description
TOSHIBA 46TL838 LED TV with LTA460HW02 LCD display, 46 "(117 cm) diagonal size in 16: 9 format. The required screen brightness of 400 cd / m² is provided by LED backlighting. Dynamic contrast ratio of 5,000,000: 1 is achieved by special control of the LEDs. V This model uses side lighting from Edge LEDs.
There is support for 3D images with active (shutter) technology for separating the right and left channels. 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 according to the standard 1080p (Full HD).
The 46TL838 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 sound system 20 W (2x10 W) provides 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 x4, 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 standards.
The power consumed by the TV in the operating mode from the network is 134 watts.
Overall dimensions: with stand 1056x704x287 mm, without stand 1056x636x39 mm.
TV Weight: with stand: 16.5 kg, without stand: 13.25 kg.
Attention! The TOSHIBA 46TL838 LED TV panel LTA460HW02 T01 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.