Technical description and composition of the TOSHIBA 32EL833G TV, type of panel and applicable modules. The composition of the modules.TOSHIBA LED
Model: 32EL833G
Chassis / Version: 32AV833
Panel: LC320EXN (SD) (A2)
LED backlight: LG Innotek V6 32INCH HD L / R-TYPE Rev 0.0
T-CON: 6870C-0370A TL2345ML, MAX9665E, TPS65170, TPS65194
LED driver (backlight): 6917L-0072A
PWM LED driver: BD9262EFV
Power Supply (PSU): DPS-92CP A
PWM Power: DDA014 (PWM Resonant), 1608B (PFC), DDA010 (Standby)
MainBoard: 32AV833 V: 1.03
IC MainBoard: MSD3704PX-LF-SA, 25064CVSIG, TAS5707L
Tuner: TDTK-G641D
Control: Remote: CT-90326; IR: 32AV833-IRLED REV1.01
Specifications 32EL833
TOSHIBA 32EL833G
General repair guidelines for TV LCD LED
Repair of all electronic devices, including the TOSHIBA 32EL833G TV, it is advisable to start with an external examination of its external and internal elements. In some cases, visible external damage to the elements can indicate the direction of troubleshooting and localization of the defect even before the start of the necessary measurements at the control points of electronic circuit nodes. 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 DPS-92CP A fails, the external manifestations may be different, for example, the TOSHIBA 32EL833G 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. When repairing the power supply, it is advisable to start the diagnostics by checking the mains fuse and the electrolytic capacitors of the filters of the converter secondary rectifiers. In the event of a fuse breaking, the reason should be sought in the power semiconductor elements of the pulse converter of the main power supply. First of all, it is necessary to check the diodes of the bridge of the rectifier of the mains voltage and the power switch (s) of the converter.
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 DDA010, DDA014, 1608B can also cause a breakdown of the power switch of the converter.
If, when you turn on the TV, the image appears and immediately disappears, or is initially absent when you turn on, but the sound has other functions that work, there is a high probability of a malfunction of the LED driver (LC320EXN (SD) (A2) panel backlight LED power converter). In such cases, the general power module is also subject to verification, in which the electrolytic capacitors of the rectifier filter supplying the LED driver should be checked.
To check the health of the LEDs, as well as contact connections in the ruler circuit, it is necessary to disassemble the panel.
To detect a break in the LED lines without disassembling the panel, a current source is required. It is impossible to open transitions connected in series with a simple multimeter; voltage of several tens of volts is necessary.
Repair or diagnostics of the 32AV833 V: 1.03 motherboard, TUNER: TDTK-G641D should start by checking the stabilizers or power converters of its microcircuits. If necessary, you should update the software (software).
Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the elements MSD3704PX-LF-SA, 25064CVSIG, TAS5707L. BGA chip malfunctions are usually easy to detect by warming up.
It should be remembered! Attempts to repair the TOSHIBA 32EL833G TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Toshiba 32EL833G Main 32AV833
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Toshiba 32AV833G Main 32AV833
1. Service Manuals with Schematic Diagrams 49 pages of 2011 on models 26EL833B, 26EL833G, 26EL833F, 26EL833R, 26EL833RB, 32EL833B, 32EL833G, 32EL833F, 32EL833N, 32EL833RTo reduce the backlight current in LED drivers with the BD9262EFV controller, the total resistance of the resistors from terminal 23 (ISET) to the housing should be proportionally increased.
2. Service Manuals with Schematic Diagrams 44 pages 2011 on model 32EL833G, 32EL834G
Repair MainBoard
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)).
PSU Advanced
According to the conditions of compliance with modern world standards for household switching power supplies, the DPS-92CP module provides for the use of a Power Factor Correction unit. The PFC circuit is a flyback converter based on the 1608B PWM controller. The reactance of an electrolytic capacitor of a line filter at a frequency of 50-60 Hz is usually not more than 20-30 ohms and its charge directly from the network through open diodes could reach tens of amperes per pulse if no filtering were applied.
As a result of the PFC conversion, an increased voltage on the capacitor (about 380V) cannot directly open the rectifier diodes, on the anode of which the voltage will always be slightly less (about 300V) and then its charging current will always be limited by the elements of the PWM controller. As a result, the envelope of the high-frequency pulses of the consumed current will repeat the shape and phase of the input sinusoidal voltage. The presence of an increased voltage (+ 380V) on the network capacitor indicates the serviceability of the PFC node.
The appearance of the power supply
Main features of the TOSHIBA 32EL833G device:
Installed matrix (LED-panel) LC320EXN (SD) (A2).
The matrix control uses the Timing Controller (T-CON) 6870C-0370A.
The LED driver 6917L-0072A is used to power the backlight LEDs, it is controlled by the BD9262EFV PWM controller.
The necessary supply voltages for all nodes of the TOSHIBA 32EL833G TV are generated by the DPS-92CP power module or its analogs using DDA014 (PWM Resonant), 1608B (PFC), DDA010 (Standby) microcircuits.
MainBoard - the main board (motherboard) is a 32AV833 module, using microchips MSD3704PX-LF-SA, 25064CVSIG, TAS5707L and others.
The TDTK-G641D tuner provides television reception and channel tuning.
Information from an alternative source:
TOSHIBA 32EL833G
Panel Type (Matrix): LC320EXN (SD) (A2)
Motherboard: 32AV833 V: 1.03, MSD3704PX-LF-SA, 25064CVSIG, TAS5707L, Tuner: TDTK-G641D
T-con: P / N: 6870C-0370A, TL2345ML, MAX9665E, TPS65170, TPS65194, Led driver: [6917L-0072A, BD9262EFV
PSU: DPS-92CP A, DDA010, DDA014, 1608B
Remote control: CT-90326
Additional technical information about the panel:
Brand: LG Display
Model: LC320EXN-SDA2
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 697.685x392.256 mm
Surface: Antiglare (Haze 10%), Hard coating (3H)
Brightness: 380 cd / m²
Contrast Ratio: 1200: 1
Display Colors: 16.7M (6-bit + Hi-FRC)
Response Time: 9 (G to G)
Frequency: 60Hz
Lamp Type: WLED Embedded (LED Driver)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
TOSHIBA 32EL833 LED TV with LC320EXN-SDA2 LCD display, 32 "(81 cm) diagonal size in 16: 9 format. The required screen brightness of 400 cd / m² is provided by LED backlighting. The ratio of maximum brightness to minimum (contrast) is 1200 : 1. 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 Digital signal processing and generation takes place 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 47 watts.
Overall dimensions: with stand 770x540x199 mm, without stand 770x495x45 mm.
TV Weight: with stand: 9.53 kg, without stand: 8.47 kg.
Attention! The LC320EXN-SDA2 panel of the TOSHIBA 32EL833 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.