Technical description and composition of the TOSHIBA 32RL838R TV, type of panel and applicable modules. The composition of the modules.TOSHIBA LED
Model: 32RL838R
Chassis / Version: PE1014ZA
Panel: LTA320HN03 75027011
LED backlight: LJ64-03204A 2 * 36 led
Power Supply (PSU): DPS-115EP A, DPS-115EP A 75026932
PWM Power: A6069H (7), 1608B (PFC), DDA014 (18)
MainBoard: PE1014 A, MAIN (FOR SERVICE), RL838 75026922, 22.B7305.001
IC MainBoard: AO Z1094DI (8), TCV 7103AF (8), TAS5708
Tuner: ENGS7305D5F
Control: CT-90386 75027012
Specifications 32RL838
TOSHIBA 32RL838R
General repair guidelines for TV LCD LED
TOSHIBA 32RL838R TV, like many other electronic devices, it is advisable to start repairing with an inspection of all external and internal elements. Often, by the external signs and nature of the damage to the elements, it becomes possible to draw some conclusions and determine a further algorithm for finding a defect before making the necessary measurements at control points. If charred resistors, swollen electrolytic or cermet capacitors, ring cracks in the solders of the terminals of transformers or heating elements are found, it is advisable to establish the causes and consequences of the malfunction that has arisen, as well as to check the connected elements and assemblies.
In the case when the 32RL838R does not turn on, does not respond to the remote control and the front panel buttons, does not blink bulbs and does not show any signs of operability, the power supply module DPS-115EP A, DPS-115EP A 75026932 is probably faulty in this case. Similar manifestations, it is necessary to check the stabilizer (converter) of the processor power supply on the motherboard. 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 broken, then you should check for breakdown of the PN junctions of the rectifier bridge diodes and the key transistor of the converter, which can either be on a separate radiator or integrated with a PWM controller in a common chip. Possible options.
In most cases, key breakdowns in switching power supplies (SMPS) do not occur for no reason and you should look for other faulty circuit elements that could provoke a defect. This can be dried electrolytic capacitors in the primary circuit, and faulty damper elements, as well as dangling resistors or punched semiconductor elements in the stabilization circuits. Possible defective PWM A6069H (7), 1608B (8), DDA014 (18) from the manufacturer.
If the TOSHIBA 32RL838R does not have an image, but there is sound, the backlight LEDs of the LTA320HN03 75027011 panel or their power converter may malfunction. You should also make sure that the electrolytic capacitors of the secondary rectifiers of the common power supply are working.
To check the health of the LEDs, as well as contact connections in the ruler circuit, it is necessary to disassemble the panel.
A break in the line of LEDs connected in series cannot be detected with a multimeter or tester without disassembling the panel. To open all the transitions, several tens of volts are needed, and it is best to use a current source for such purposes.
On the motherboard PE1014A, MAIN (FOR SERVICE), RL838 75026922, 22.B7305.001, in the event of a malfunction, you should first check the operation of all the stabilizers or power converters of the microcircuits and, if necessary, update the software (software).
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 chips AO Z1094DI (8), TCV 7103AF (8), TAS5708 and other possible faulty components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
If the TV works normally from external devices, but does not tune to television channels, the ENGS7305D5F tuner may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding terminals, as well as the power supply of varicaps (30-33V).
Attention! For users and owners of 32RL838R TVs who do not have the appropriate qualifications, knowledge and experience, we strongly recommend against attempting self-repair in order to avoid negative consequences that could lead to the complete non-repairability of the device.
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Toshiba 32RL838/RL858 Main: PE1014ZA schematic diagram
The appearance of MainBoard PE1014 is shown in the figure below:PE1014
PE1014 can be used in TVs:
TOSHIBA 32RL838R (Panel LTA320HN03 75027011), TOSHIBA 40RL838R K (Panel LTA400HM15).
PSU Advanced
The 32RL838R TV is equipped with a DPS-115EP power module using the PFC (Power Factor Correction) circuitry acting as an active filter to eliminate the higher harmonic components of the current consumption. The boost converter based on the 1608B PWM controller does not allow the input rectifier filter's electrolytic capacitor to be connected to the network directly through open diodes when the reactance (about 15-30 ohms at a frequency of 50 Hz) determines the charge current. As a result of the conversion, the charging current of the capacitor will be determined in such a way that the envelope of the high-frequency pulses of the input current will repeat the phase and shape of the sine wave of the input voltage. The health check of the PFC unit is carried out by measuring the DC voltage on the capacitor of the rectifier network. In operating mode, it should be around 380V, in standby approximately 300V.
The appearance of the power supply
Main features of the TOSHIBA 32RL838R device:
Installed matrix (LED panel) LTA320HN03 75027011.
The necessary supply voltages for all nodes of the TOSHIBA 32RL838R TV are generated by the DPS-115EP power supply module or its analogs using A6069H (7), 1608B (PFC), DDA014 (18) microcircuits.
MainBoard - the main board (motherboard) is a PE1014 module, using AO Z1094DI (8), TCV 7103AF (8), TAS5708 and others.
The ENGS7305D5F tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTA320HN03-T
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1920x1080, FHD
Display Mode: S-PVA, Normally Black, Transmissive
Active Area: 698.4x392.85 mm
Surface: Antiglare (Haze 5.5%)
Brightness: 400 cd / m²
Contrast Ratio: 5000: 1
Display Colors: 1.07B (10-bit), CIE1931 70%
Response Time: 16 (Max.) (Tr + Td)
Frequency: 60Hz
Lamp Type: WLED Embedded (LED Driver)
Signal Interface: LVDS (2 ch, 10-bit), 51 pins
Voltage: 12.0V
Trademark: TOSHIBA, Model: 32RL838.
Short from TV: LCD, LED backlight, 32 ", 1920x1080, 1080p Full HD, sound: 20W, HDMI: 3, Internet access, Smart TV.
The composition uses MainBoard PE1014 A 75026922, 22.B7305.001 and an LCD panel (matrix) LTA320HN03.
Power Supply Unit (PSU) DPS-115EP A 75026932 Power Supply.
TOSHIBA 32RL838 LED TV with LTA320HN03 LCD display, 32 "(81 cm) diagonal size in 16: 9 format. The required screen brightness of 400 cd / m² is provided by LED backlighting. Dynamic contrast ratio of 3000000: 1 is achieved by special control of the LEDs. V 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 with a resolution of 1920x1080 pixels in a graphic resolution of 1080p (Full HD).
The 32RL838 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 x3, 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, 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 71 watts.
Overall dimensions: with stand 735x497x172 mm, without stand 735x457x57 mm.
Attention! The panel of the TOSHIBA 32RL838 LED TV LTA320HN03 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.