Technical description and composition of the TOSHIBA 26EL833RB TV, type of panel and applicable modules. The composition of the modules.TOSHIBA LED
Model: 26EL833RB
Chassis / Version: 32AV833
Panel: LC260EXN (SD) (A3) 75023140
T-CON: Controller integrated
LED driver (backlight): Inverter built-in
PWM LED driver: FSFR1800
Power Supply (PSU): PE-3900-01UN-LF 0433-005E000, DPS-92CP A 75025229 0433-005E000, (DPS135JP A)
PWM Power: FAN7930, A6069H, FSFR1800
MOSFET Power: A60DR
MainBoard: 32AV833 Rev: 1.03 9C-EB40M0010 75025242
IC MainBoard: MSD3704PX-LF-SA. TAS5707L,
Tuner: TDKT-G641D
Control: CT-90326
Specifications 26EL833
TOSHIBA 26EL833RB
General repair guidelines for TV LCD LED
TOSHIBA 26EL833RB TV, like many other electronic devices, it is advisable to start repairing by inspecting all external and internal elements. Many visible changes in the state of the elements make it possible to determine the further direction of troubleshooting and localization of the defect. Ring cracks in the soldering of the leads of the heating elements, swollen electrolytic capacitors, a charred paint layer on the resistors - all this for the repairman can be a significant clue in the assumptions about the causes and consequences of the malfunction.
Sometimes the TOSHIBA 26EL833RB TV simply does not turn on. No control lights on the front panel are lit or blinking, the TV does not respond to the remote control and does not make any sounds or any signs of life when turned on. The most likely cause of the malfunction is the failure of the common power supply module DPS-92CP A 75025229 0433-005E000, (DPS135JP A), PE-3900-01UN-LF 0433-005E000. If it is working properly, you need to check the processor batteries on the SSB (Main Board). 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 - A60DR diodes and transistors, for the possibility of an avalanche or thermal breakdown.
If a breakdown of the power switch is detected, it should be remembered that in a switching power supply (IIP) it does not fail by itself without any reasons that should be sought by checking other elements of the primary circuit - electrolytic capacitors, PWM controller A6069H, which should be checked it is possible only by replacement, as well as other semiconductor elements (diodes, transistors, zener diodes).
In cases where the TOSHIBA 26EL833RB TV has lost an image, and the sound is there and all other functions are operational, there is a possibility of a malfunction of the LED driver (converter for powering the backlight LEDs of the LC260EXN (SD) (A3) 75023140 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.
To check the health of the LEDs, as well as contact connections in the ruler circuit, it is necessary to disassemble the panel.
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.
Repair or diagnostics of the motherboard 32AV833 Rev: 1.03 9C-EB40M0010 75025242 should begin by checking the stabilizers or power converters of its microcircuits. If necessary, you should update the software (software).
If it is not possible to replace the MB (SSB) card, you need to check the health of its elements - MSD3704PX-LF-SA. TAS5707L,. Defective components should be replaced.
The TDKT-G641D tuner malfunction is established after checking the software and all the supply voltages at its terminals, including the varicap supply voltage (30-33V).
Remember! Attempts to self-repair by users of the TOSHIBA 26EL833RB TV without the appropriate qualifications and the necessary experience can lead to serious negative consequences!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Toshiba 26EL833G 32AV833
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Toshiba 32AV833
Service Manuals with Schematic Diagrams 49 pages 2011 on models 26EL833B, 26EL833G, 26EL833F, 26EL833R, 26EL833RB, 32EL833B, 32EL833G, 32EL833F, 32EL833N, 32EL833R
The appearance of the MainBoard 32AV833 is shown in the figure below:32AV833
32AV833 can be used in TVs:
TOSHIBA 26EL833RB (Panel LC260EXN (SD)(A3) 75023140), TOSHIBA 26EL834RB (Panel LC260EXN SD A3), TOSHIBA 32AV833RB (Panel LC320WXN SCC1), TOSHIBA 32EL833G (Panel LC320EXN (SD)(A2)), TOSHIBA 32EL833R 32EL834R (Panel LC320EXN-SDA2 75023687 LCD PANEL), TOSHIBA 32HL833R (Panel LC320EUN SD V1 75022862 LED), TOSHIBA 32HL834R (Panel LC320EUN (SD)(V1)), TOSHIBA 32LV833RB (Panel T315HW04 V4), TOSHIBA 40LV833RB (Panel V400H1-L10), TOSHIBA 42DB833R (Panel LC420EUN (SD)(V1) 75023049), TOSHIBA 42HL833R (Panel LC420EUN (SD)(V1) LED 75023049), TOSHIBA 42HL834R (Panel LC420EUN (SD)(V1)).
The appearance of the power supply
Main features of the TOSHIBA 26EL833RB device:
Installed matrix (LED-panel) LC260EXN (SD) (A3) 75023140.
The matrix control uses the Timing Controller (T-CON) Controller.
The LED driver Inverter is used to power the backlight LEDs, it is controlled by the FSFR1800 PWM controller.
The necessary supply voltages for all nodes of the TOSHIBA 26EL833RB TV are generated by the PE-3900-01UN-LF power module or its analogs using FAN7930, A6069H, FSFR1800 microcircuits and A60DR type power switches.
MainBoard - the main board (motherboard) is a 32AV833 module using MSD3704PX-LF-SA chips. TAS5707L, and others.
The TDKT-G641D tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: LG Display
Model: LC260EXN-SDA3
Type: a-Si TFT-LCD, Panel
Diagonal size: 26.0 inch
Resolution: 1366x768, WXGA
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 575.769x323.712 mm
Surface: Antiglare (Haze 10%), Hard coating (3H)
Brightness: 350 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 68%
Response Time: 6 (G to G)
Frequency: 60Hz
Lamp Type: WLED Embedded (LED Driver)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
TOSHIBA 26EL833 LED TV with LC260EXN LCD display, 26 "(66 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. You can view images in high quality HD at a resolution of 1366x768 pixels in the standard for graphic decomposition 720p (HD Ready). The input high-frequency or video signal can be processed in analog systems PAL, SECAM, NTSC Graphic processing and digital signal generation occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p. Supported media file formats: MP3, MPEG4, Xvid, MKV, JPEG.
The power of the sound system 10 W (2x5 W) provide 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 x2, component, SCART, RGB, VGA, HDMI x2, USB. 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 41 watts.
Overall dimensions: with stand 643x468x181 mm, without stand 643x420x45 mm.
TV Weight: with stand: 6.17 kg, without stand: 5.34 kg.
Attention! The LC260EXN (SD) (A3) panel of the TOSHIBA 26EL833 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.