Technical description and composition of the TOSHIBA 40TL838R TV, type of panel and applicable modules. The composition of the modules.TOSHIBA LED
Model: 40TL838R
Panel: LTA400HV01
T-CON: SD120PBMB4C6LV0.1 S23760D1I0DSR
LED driver (backlight): SSL400 3E2T
PWM LED driver: SSL100SN
MOSFET LED driver: STA3250 FDD86102 C9298H
Trans LED driver: 3422250017CDC
Power Supply (PSU): N150A001L REV.01 V71A00022900
PWM Power: A6069H, FAN6961 (PFC)
MOSFET Power: K12A50D
MainBoard: PE1000 V28A001325A1
IC MainBoard: .CPU: MSD388USV-V6; DRAM: K4B1G1646G-BCK0; NAND Flash: TC58NVG1S3ETA00BKH; SPI Flash: MX25L1606EM2I-12G, EN25F20-100GIPTY
Tuner: ENGS7305D5F
Control: CT-90838
Specifications 40TL838
TOSHIBA 40TL838R
General repair guidelines for TV LCD LED
Repair of electronic equipment usually begins with its external inspection and diagnosis of the malfunction. In this case, you should examine all the internal components of the TOSHIBA 40TL838R TV, as well as the external elements of the housing. Often, based on certain external signs, it may be possible to draw certain conclusions about the reasons for the failure of certain elements of the circuit even before the necessary measurements are made, which will determine the further algorithm for troubleshooting and localizing the defect. In most cases, the repairman can guess the causes of the defect and possible consequences from the characteristic signs of typical TV defects, for example, ring cracks formed in the soldering of the element leads, swollen rectifier filter capacitors, charred resistors and other circuit elements.
In the absence of any signs of operability, when the TOSHIBA 40TL838R 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 power supply module FMB33A 0404879 V71A00022900 N150A001L REV.01 of the TV. With the same manifestations, the power regulator of the control processor on the motherboard may be faulty. When diagnosing and repairing the power supply, after replacing the swollen capacitors of the secondary rectifier filters (if any), you must first check the mains fuse. When it is broken, the power elements of the K12A50D transistors and rectifier bridge diodes should be checked for avalanche (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 A6069H AN6961 can also cause a breakdown of the power switch of the converter.
If the TOSHIBA 40TL838R does not have an image, but there is sound and the TV is controlled by the remote control, a malfunction in the backlight circuits of the LTA400HV01 panel is likely. The LEDs or the power converter - LED driver may be faulty. Often in such cases, when you turn on the TV, an image appears and immediately disappears. First of all, it is necessary to verify the operability of the electrolytic capacitors of the rectifier filter supplying the LED driver, and check the LEDs, connecting obviously known good diagnostics.
To check the health of the LEDs, as well as contact connections in the ruler circuit, it is necessary to disassemble the panel.
To check the LED lines for breaks without disassembling the panel, for example, a current source will help. It is impossible to open series-connected PN junctions with a simple multimeter, a voltage of the order of several tens of volts is required.
When trying to repair the motherboard, you should first check the serviceability of linear stabilizers or power converters of microcircuits and, if necessary, update the software (software).
In cases of attempts to repair the MB board (SSB), it is necessary to check the health of its elements -. which may require replacement with new ones. If a BGA processor is installed, there is a possibility of a violation of the soldering of the contacts of its conclusions with the board (it is diagnosed by heating).
Before replacing the tuner ENGS7305D5F, if there is no tuning to the channels, first you need to check the supply voltage at its terminals, including the power supply of varicaps (30-33V).
Attention! For users and owners of 40TL838R 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 ------------------> 32/40/46TL838/868 main PE1000ZA
Schematic Diagrams 86 pages of 2011 on the 40TL838, 40TL868
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).
PSU Advanced
The N150A001L power supply module is made using the Power Factor Correction (PFC) scheme to eliminate multiple AC harmonics introduced into the power supply by the device. The PFC node is a Step-Up Converter based on the AN6961 PWM controller, which evenly distributes high-frequency pulses of the charging current of the electrolytic capacitor of the rectifier filter of the mains voltage over a period of 50 Hz. The current of its charge in this case will already be determined not by its reactance (usually 10-30 ohms for the network frequency), but by the elements of the converter. As a result, a change in the amplitude of the pulses (envelope) of the consumed current of the converter will repeat the shape and phase of the input sinusoidal voltage. The availability of an increased voltage (about + 380V) in the operating mode on the capacitor of the line filter indicates the serviceability of the PFC node.
The appearance of the power supply
Main features of the TOSHIBA 40TL838R device:
Installed matrix (LED-panel) LTA400HV01.
The matrix control uses the Timing Controller (T-CON) SD120PBMB4C6LV0.1.
The LED driver SSL400 is used to power the backlight LEDs, it is controlled by the SSL100SN PWM controller. A transformer 3422250017CDC is installed in the LED driver converter. As the power elements of the LED driver, keys of the type STA3250 FDD86102 C9298H are used.
The necessary supply voltages for all nodes of the TOSHIBA 40TL838R TV are generated by the N150A001L power module or its analogs using A6069H, FAN6961 (PFC) microcircuits 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 ENGS7305D5F tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTA400HV01
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: Glare (Haze 0%), Hard coating (2H)
Brightness: 450 cd / m²
Contrast Ratio: 5000: 1
Display Colors: 1.07B (8-bit + Hi-FRC), CIE1931 72%
Response Time: 15 (Max.) (G to G)
Frequency: 120Hz
Lamp Type: WLED Embedded (LED Driver)
Signal Interface: LVDS (4 ch, 10-bit), 92 pins
Voltage: 12.0V
TOSHIBA 40TL838 LED TV with an LTA400HV01 LCD display, 40 "(102 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 40TL838 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 113 watts.
Overall dimensions: with stand 923x629x240 mm, without stand 923x562x39 mm.
TV Weight: with stand: 14.5 kg, without stand: 12.2 kg.
Attention! The panel of the TOSHIBA 40TL838 LED TV LTA400HV01 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.
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 40TL838 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 113 watts.
Overall dimensions: with stand 923x629x240 mm, without stand 923x562x39 mm.
TV Weight: with stand: 14.5 kg, without stand: 12.2 kg.
Attention! The panel of the TOSHIBA 40TL838 LED TV LTA400HV01 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.