Technical description and composition of the TOSHIBA 32EL833R TV, type of panel and applicable modules. The composition of the modules.TOSHIBA LED
Model: 32EL833R 32EL834R
Chassis / Version: 32AV833
Panel: LC320EXN-SDA2 75023687 LCD PANEL,
LED backlight: 3660L-0386A, LG lnnotek V6 32INCH HD L-Type / R-Type Rev 0.0 20101104
T-CON: 6870C-0370A LC320EXN TPS65194, TPS65170, TL2345ML, MAXIM 9668E
LED driver (backlight): 6917L-0072A PPW-LE32GD-O (B) Rev0.1
PWM LED driver: BD9262EFV
MOSFET LED driver: DB31AB
Power Supply (PSU): PE-3900-01UN-LF // DPS-92CP A (DPS-135JP A) POWER OPENFRAME, 88W / + 5 12 24V, 0433-005E000 12004XBB
PWM Power: FAN7930, A6069H (7), FSFR1800
MOSFET Power: K6A60D
MainBoard: 32AV833 / 32EL833 Rev1.03 75025283 9C-EB40M0040
IC MainBoard: MSD3704PX-LF-SA. TAS5707L
Tuner: TDTK-G641D
Control: Remote: CT-90326, IR: 32AV833-IRLED Rev1.01
Specifications 32EL833
TOSHIBA 32EL833R
General repair guidelines for TV LCD LED
Repair of all electronic devices, including the TOSHIBA 32EL833R TV, it is advisable to start with an external examination of its external and internal elements. Using visible changes in the state of components, it is usually possible to determine the further direction of troubleshooting and localization of the defect before the necessary measurements are taken. 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 absence of any signs of operability, when the TOSHIBA 32EL833R 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 PE-3900-01UN-LF // DPS-92CP A (DPS-135JP A) POWER OPENFRAME module, 88W / + 5 12 24V, 0433-005E000 12004XBB TV. With the same manifestations, the power regulator of the control processor on the motherboard 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 K6A60D converter.
Power switches in pulsed power supplies (SMPS) fail extremely rarely for no reason and, if they are broken, it is necessary to look for a malfunction in the stabilization circuits by checking electrolytic capacitors, semiconductor devices, and resistors in the primary circuit. The reason may be a malfunction of the PWM controller chip A6069H (7), FSFR1800, which can only be checked by replacing it with a new or obviously working one.
If the TOSHIBA 32EL833R has no image, the sound is there and the channels are switched, there is a possibility of a malfunction in the backlight LED circuit of the LC320EXN-SDA2 75023687 LCD PANEL panel, or their power converter - LED drivers. Sometimes when you turn on the image appears and disappears immediately. In such cases, it is necessary to check the electrolytic capacitors of the power filter of the LED driver itself, including in the secondary rectifier of the main PSU.
Often in the absence of backlighting, disassembling the panel is required. It is necessary to check the serviceability of the transitions of the LEDs, as well as the reliability of the contact connections in the rulers and connectors.
It is impossible to check the LED line for breaks without disassembling the panel with a multimeter or tester. For these purposes, it is necessary to open all series-connected PN junctions and a voltage of the order of tens of volts will be required, and ideally, a current source.
In cases of attempts to repair the motherboard 75025283 PC BOARD ASSY, MAIN, 32EL833 Rev1.03, 9C-EB40M0040 tun TDTK-G641D, it is necessary to check the operability of the stabilizers or power converters of its microcircuits and, if possible, update the software (software). BGA chips can in most cases be diagnosed by local heating.
For owners of the 32EL833R TV, we recommend that you contact qualified personnel with experience to repair! Self-repair attempts without the appropriate knowledge and skills can lead to serious negative consequences!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Toshiba 32AV833
1. Service Manuals with Schematic Diagrams 49 pages of 2011 on models 26EL833B, 26EL833G, 26EL833F, 26EL833R, 26EL833RB, 32EL833B, 32EL833G, 32EL833F, 32EL833N, 32EL833R
2. Service Manuals with Schematic Diagrams 44 pages 2011 on model 32EL833G, 32EL834G
To 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.
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 32EL833R device:
Installed matrix (LED-panel) LC320EXN-SDA2 75023687 LCD PANEL ,.
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. As power elements of the LED driver, keys of the DB31AB type are used.
The necessary supply voltages for all nodes of the TOSHIBA 32EL833R TV are generated by the PE-3900-01UN-LF power module or its analogs using FAN7930, A6069H (7), FSFR1800 microcircuits and K6A60D type power switches.
MainBoard - the main board (motherboard) is a 32AV833 module using MSD3704PX-LF-SA chips. TAS5707L and others.
The TDTK-G641D tuner provides television reception and channel tuning.
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.
