Technical description and composition of the TOSHIBA 32HL833R TV, type of panel and applicable modules. The composition of the modules.TOSHIBA LED
Model: 32HL833R
Chassis / Version: 32AV833
Panel: LC320EUN SD V1 75022862 LED
LED backlight: 3660L-0373A 32 V6 Edge EHD Rev1.0 1 L-Type / R-Type
T-CON: V6 32/42/47 TM120HZ_TETRA 6870C-0368A Ver V0.6
LED driver (backlight): KLS-E320RABHF06 C
PWM LED driver: BD9262EFV
MOSFET LED driver: AOD482
Trans LED driver: S470 11CD choke
Power Supply (PSU): PE-3900-01UN-LF 75025229 0433-005E000 DPS-92CP
PWM Power: FAN7930, A6069H (7), FSFR1800
MOSFET Power: K6A60D
MainBoard: 32AV833 Rev1.03
IC MainBoard: MSD3704PX-LX-SA, TAS5707L
Tuner: TDKT-G641D 75025625
Control: Remote: CT-90326, IR: 32AV833-IRLED
Specifications 32HL833
TOSHIBA 32HL833R
General repair guidelines for TV LCD LED
Repair of the TOSHIBA 32HL833R TV should begin with a fault diagnosis, which involves a careful examination of the external and internal elements of the device. Often, based on certain external signs, it may be possible to draw certain conclusions about the reasons for the failure of certain elements of the circuit even before the necessary measurements are made, which will determine the further algorithm for troubleshooting and localizing the defect. 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 32HL833R TV does not turn on, does not make any sounds when it is turned on, and also no indicators on the front panel light or blink - there is a high probability of a malfunction in the power supply module. In some cases, only the regulator or power converter of the control processor may be faulty, which is typical for some TOSHIBA models. First of all, it is necessary to replace the swollen capacitors of the rectifier filters, if any. If the mains fuse is broken in the power supply, in most cases a breakdown of the power key (s) K6A60D is detected, which can be integrated with a PWM controller, or a separate field-effect transistor can be used. The rectifier bridge diodes and the electrolytic capacitor of the mains rectifier filter should also be checked.
It should be remembered that in the practice of repair, usually the power switches in switching power supplies (SMPS) do not fail due to their poor quality and, in such cases, it is necessary to look for the cause that led to a malfunction and provoked a breakdown of the key. Most often, the culprits of the accident are dried electrolytic capacitors or dangling resistors in the primary circuit, or the A6069H (7) FSFR1800 PWM controller chip itself may be faulty. It is also necessary to check all the semiconductor elements of the stabilization circuit in the primary and secondary circuits.
If the TOSHIBA 32HL833R does not have an image, but there is sound, the backlight LEDs of the LC320EUN SD V1 75022862 LED 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.
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 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.
Diagnosis and repair of the 32AV833 Rev1.03 motherboard is carried out by checking the performance of the stabilizers or power converters of the module chips. In some cases, a software update is required.
In some cases, it is necessary to check or replace (if necessary) the elements of the MB board (SSB) - MSD3704PX-LX-SA, TAS5707L. In cases where the BGA processor is used, its malfunction is usually detected by the local heating method.
If there is no reception of television channels, but the TV is working properly from external devices, first of all it is necessary to check the voltage of the varicaps of the tuner TDKT-G641D 75025625, which is usually within 30-33V, as well as other supply voltages at the terminals of the tuner.
Attention! For users and owners of 32HL833R 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 complete non-repairability of the device.
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Toshiba 32AV833G 32AV833
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
Key Features of the TOSHIBA 32HL833R:
Installed matrix (LED-panel) LC320EUN SD V1 75022862 LED.
The matrix control uses the Timing Controller (T-CON) V6.
To power the backlight LEDs, the KLS-E320RABHF06 LED driver is used, controlled by the BD9262EFV PWM controller. In the converter of the LED driver, a transformer S470 11CD is installed. As power elements of the LED driver, keys of the AOD482 type are used.
The necessary supply voltages for all nodes of the TOSHIBA 32HL833R 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 microchips MSD3704PX-LX-SA, TAS5707L and others.
The TDKT-G641D 75025625 tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: LG Display
Model: LC320EUN-SDV1
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1920x1080, FHD
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 698.4x392.85 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
Brand: TOSHIBA, Model: 32HL833.
Shortly from the TV: LCD, LED backlight, 32 ", 1920x1080, 1080p Full HD, sound: 10W, HDMI connectors: 2.
The official Toshiba website has firmware (software update) for the models 32HL833N (1.57), 32HL833G (1.05), 32HL833F (1.57), 32HL833B (1.57).
The composition uses MainBoard 32AV833 Rev1.03 and an LCD panel (matrix) LC320EUN SD V1.
Power Supply Unit (PSU) PE-3900-01UN-LF 75025229, DPS-92CP Power Supply.
TOSHIBA 32HL833 LED TV with LC320EUN LCD, 32 "(81 cm) diagonal size in 16: 9 format. The required screen brightness of 360 cd / m² is provided by LED backlight LED. 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 In the graphic decomposition according to the standard 1080p (Full HD). 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 51 watts.
Overall dimensions: with stand 770x542x201 mm, without stand 770x495x45 mm.
TV Weight: with stand: 10 kg, without stand: 8.58 kg.
Attention! The LC320EUN SD V1 panel of the TOSHIBA 32HL833 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.