Technical description and composition of the TOSHIBA 37RL833R TV, type of panel and applicable modules. The composition of the modules.TOSHIBA LED
Model: 37RL833R
Panel: LC370EUN (SD) (V1)
T-CON: 6870C-0374A
LED driver (backlight): 6917L-0056C - PPW-LE37GD-O (C) Rev1.0
Power Supply (PSU): PSLF161502A V71A00021500
PWM Power: PWM
MainBoard: PE0957 V28A001258A1
Tuner: ENGS7305D5F
Control: IR: V28A001259A1 PE0958
Specifications 37RL833
TOSHIBA 37RL833R
General repair guidelines for TV LCD LED
In cases where the TOSHIBA 37RL833R TV does not turn on, does not respond to the remote control and buttons, no indicators on the front panel light up or blink, and there are no sounds or any signs of operability when turning on, the PSLF161502A V71A00021500 power supply module is most likely faulty or there is no power standby mode. In the general case, first of all, it is necessary to check the electrolytic capacitors of the secondary rectifier filters and the fuse at the input of the network. If it is cut off, then it is necessary to check the diodes of the rectifier bridge and the key transistor of the converter for a breakdown of the PN junctions, which can either be on a separate radiator or integrated with a PWM controller in a common chip. Possible options.
If the power keys of the pulse converter are not equal, you should pay attention to other elements in their bundling, which may be the result or cause of their breakdown.
If the image appears and immediately disappears when the TV is turned on, or it is initially absent when it is turned on, but the sound has other functions that work, there is a high probability of a malfunction of the display backlight LEDs or the LED driver (power converter for the backlight of the LC370EUN (SD) panel (V1)).
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 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. Then it is necessary to open the panel and check each LED separately with a multimeter. If the capabilities of your multimeter do not allow you to open the LED in the forward direction or dual LEd are used, then the PN junction of the emergency zener diode can indirectly serve as a health indicator. In case of LED-a failure, the zener diode PN junction will either be cut off or broken into short-circuit.
The motherboard PE0957 V28A001258A1 must be checked 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.
The malfunction of the ENGS7305D5F tuner is established after checking the software and all the supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope.
Attention! For users and owners of 37RL833R TVs who do not have the appropriate qualifications, knowledge and experience, we strongly recommend against self-repair attempts to avoid negative consequences that could lead to complete non-repairability of the device.
The appearance of MainBoard PE0957 is shown in the figure below:PE0957
PE0957 can be used in TVs:
TOSHIBA 42RL833R (Panel LC420EUN-SDV1 75023049), TOSHIBA 37RL833R (Panel LC370EUN (SD)(V1)).
The appearance of the power supply
Key Features of the TOSHIBA 37RL833R:
Installed matrix (LED-panel) LC370EUN (SD) (V1).
The matrix control uses the Timing Controller (T-CON) 6870C-0374A.
The LED driver 6917L-0056C is used to power the backlight LEDs.
The necessary supply voltages for all nodes of the TOSHIBA 37RL833R TV are generated by the PSLF161502A power module, or its analogs using PWM chips.
MainBoard - the main board (motherboard) is a PE0957 module.
The ENGS7305D5F tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: LG Display
Model: LC370EUN-SDV1
Type: a-Si TFT-LCD, Panel
Diagonal size: 37 inch
Resolution: 1920x1080, FHD
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 819.36x460.89 mm
Surface: Antiglare (Haze 10%), Hard coating (3H)
Brightness: 360 cd / m²
Contrast Ratio: 1400: 1
Display Colors: 16.7M (8-bit), CIE1931 68%
Response Time: 6 (G to G)
Frequency: 60Hz
Lamp Type: WLED Embedded (LED Driver)
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V
Trademark: TOSHIBA, Model: 37RL833.
Briefly from the TV: LCD, LED backlight, 37 ", 1920x1080, 1080p Full HD, sound: 20W, HDMI: 4, Internet access, Smart TV.
On the official Toshiba website there are firmware (software update) for the models 37RL833R (17.8.37.1), 37RL833G (17.8.37.1).
The composition includes MainBoard PE0957 V28A001258A1 and LCD panel (matrix) LC370EUN (SD) (V1).
Power Supply Unit (PSU) PSLF161502A V71A00021500 Power Supply.
TOSHIBA 37RL833 LED TV with LC370EUN LCD, diagonal size 37 "(94 cm) in 16: 9 format. The required screen brightness of 360 cd / m² is provided by LED backlighting. The ratio of maximum brightness to minimum (contrast) is 1400: 1 Dynamic contrast ratio of 3,000,000: 1 is achieved by special control of the LEDs operation.This model uses side illumination from Edge LEDs.The design and technical capabilities of the TV include watching programs and movies in high quality HD at a resolution of 1920x1080 pixels th in graphical expansion in standard 1080p (Full HD).
The 37RL833 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, MPEG4, 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, audio x3, component, SCART, RGB, VGA, HDMI x4, USB, 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.
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 72 watts.
Overall dimensions: 900x620x210 mm.
TV Weight: 12.5 kg.
Attention! The TOSHIBA 37RL833 LED TV panel LC370EUN (SD) (V1) 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.
