Technical description and composition of the TOSHIBA 32W2453RK TV, type of panel and applicable modules. The composition of the modules.TOSHIBA LED
Model: 32W2453RK
Chassis / Version: L2300
Panel: UNV3232-01Y
LED backlight: CORE 32 6PKG REV 0.2
T-CON: 6870C-0442B
LED driver (backlight): integrated into PSU
PWM LED driver: OZ9908AGN
MOSFET LED driver: D8N25
Power Supply (PSU): UE-3840-1U
PWM Power: FAN6754MR, IN1M101
MOSFET Power: K6A65D
MainBoard: L2300 REV: 1.03A.01 60EB40M25A01P
IC MainBoard: MSD8841BX-VW, RT9025 (8), 5432 P22564 (8), 4435GM (8), TAS5707L
Tuner: TDSY-G230D
Control: IR: 32W24 REV: 1.01
Specifications 32W2453
TOSHIBA 32W2453RK
General repair guidelines for TV LCD LED
Possible malfunctions
- The TOSHIBA 32W2453RK TV does not turn on and does not show any signs of operability at all. There is no reaction to the remote control and control buttons from the front panel.
Most often, with such manifestations, the main power module UE-3840-1U is found to be faulty. It is necessary to measure its output supply voltage, and in case of their absence, check the serviceability of the power switches (K6A65D) of the converters and rectifier diodes for the probability of breakdown in PN semiconductor junctions.
In case of breakdowns in the secondary circuits, the converter, as a rule, can emergency work in the short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse usually breaks.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, in the power supply circuit of a PWM controller, in frequency-setting or damping circuits, as well as in Negative Stabilization Feedback. PWM chips FAN6754MR, IN1M101 are usually checked by replacing with new, or obviously working.
- There is no image, but there is sound and all the other functions of the TV work. The image sometimes for a second appears immediately after turning on and disappears.
A malfunction is usually most likely in these cases at the backlight nodes of the display matrix. Often the cause is a malfunction of the LEDs (open circuit, short circuit ...), or the connectors of the strips (strings), less often the LED driver is malfunctioning.
It is impossible to check the line of series-connected LEDs without a special current source, and for this purpose it is not safe to use any voltage sources above 12V for them. Then it remains only to open the panel and check each LED separately. Usually, Chinese 9V-powered multimeters light up a single 3-volt LED, if you connect the probes in the forward direction, the red probe to the anode, and the black to the cathode. In dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of health. In the event of a LED malfunction, its zener diode will either be cut off or broken into short-circuit.
- The TV does not turn on, the indicator indicates standby or operating mode, or blinks.
Repair or diagnostics of the L2300 motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, update or replace the software (software). Often, the MB (SSB) card must be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - MSD8841BX-VW, RT9025 (8), 5432 P22564 (8), 4435GM (8), TAS5707L and replace failed chips with new ones. Some malfunctions may be due to the use of BGA soldering technologies in modern Main Board technologies. Typically, such defects are detected by local heating of the chip.
Before changing the TDSY-G230D tuner, if it is not possible to tune to television channels, make sure that there are supply voltages, which must be measured at the corresponding terminals of the tuner and checked for correctness. The pulses of the data exchange of the tuner with the processor can be controlled by an oscilloscope
Once again, remind users! Attempts to independently repair the TOSHIBA 32W2453RK TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> TOSHIBA 32W2453RK Chassis L2300.
FIRMWARE FOR SPI FLASH -----------> TOSHIBA 32W2453RK L2300, Main: L2300 REV:1.03A.01 60EB40M25A01P, Panel: UNV3232-01Y
The appearance of the MainBoard L2300 is shown in the figure below:L2300
L2300 can be used in TVs:
TOSHIBA 32L2353RB (Panel T320HVN04.0 / LSC320HN03-T01), TOSHIBA 32W2353RB (Panel LSC320AN02-T 01), TOSHIBA 39L2353RB (Panel T390HVN01 / 96.39S02.002), TOSHIBA 50L2353RK (Panel LC500DUE SFR1), TOSHIBA 40L2453RK (Panel UNV4031Y 1823-01XU0TB), TOSHIBA 32L2454RB 32L2453RB (Panel LC320EUJ (FF)(E2)), TOSHIBA 40L2454RK (Panel UNV4031Y 1823-01XU0TB).
The appearance of the power supply
Main features of the TOSHIBA 32W2453RK device:
Installed matrix (LED-panel) UNV3232-01Y.
The matrix control uses the Timing Controller (T-CON) 6870C-0442B.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by the OZ9908AGN PWM controller. As the power elements of the LED driver, keys of the D8N25 type are used.
The necessary supply voltages for all nodes of the TOSHIBA 32W2453RK TV are generated by the power module UE-3840-1U, or its analogs using FAN6754MR, IN1M101 microcircuits and K6A65D type power switches.
MainBoard - the main board (motherboard) is an L2300 module, using microchips MSD8841BX-VW, RT9025 (8), 5432 P22564 (8), 4435GM (8), TAS5707L and others.
The TDSY-G230D tuner provides TV reception and channel tuning.
TOSHIBA 32W2453 LED TV with 32 ”(81 cm) diagonal LCD display in 16: 9 format. The required screen brightness of 250 cd / m² is provided by LED backlight LED. The ratio of maximum brightness to minimum (contrast) is 1200: 1. Dynamic contrast ratio of 25000: 1 is achieved by special control of the LEDs. The LCD panel uses backlighting from Direct LEDs. You can view images in high quality HD at a resolution of 1366x768 pixels in the standard of graphic decomposition 720p (HD Ready). Input high-frequency illumination 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, MPEG4, DivX, MKV, JPEG .
The power of the speaker system of sound 14 W (2x7 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, component, SCART, RGB, VGA, HDMI x2, MHL, 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, 1360x768.
A digital tuner is capable of receiving television channels in the DVB-T MPEG4, DVB-C, DVB-T2 standards.
The power consumed by the TV in the operating mode from the network is 34 watts.
Overall dimensions: with stand 735x478x183 mm, without stand 735x442x70 mm.
TV Weight: with stand: 6 kg, without stand: 5.5 kg.
Attention! The TOSHIBA 32W2453 LED TV panel 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.