Technical description and composition of the TOSHIBA 23KL933R TV, type of panel and applicable modules. The composition of the modules.TOSHIBA LED
Model: 23KL933R
Panel: LTM230HT10
T-CON: LTM230HT10S2LV0.5_HF; LUU4321M3R-05, SM4106, 17014HS
LED driver (backlight): 17CON08-2
PWM LED driver: TPS61199
MOSFET LED driver: MDD1903
Power Supply (PSU): 17PW80
PWM Power: G1143LOP (8), ICE3BR0665J (Standby), CAT7581 (8)
MainBoard: 17MB62-2.5
IC MainBoard: K4T1G164QF-BCF8, 25Q80BVSIG, NAND512WEA2DN6
Tuner: SUT-RE216TN H 2A212E
Control: CT-8023
Specifications 23KL933
TOSHIBA 23KL933R
General repair guidelines for TV LCD LED
Possible malfunctions
- The TOSHIBA 23KL933R TV does not turn on, does not respond to the remote control and the control panel buttons, the indicators do not light or flash.
In such cases, the 17PW80 power supply may be malfunctioning. It is necessary to measure its secondary output supply voltages, and if they are absent, check the operability of the power switches of the converters and rectifier diodes for the probability of breakdown in semiconductor PN junctions.
During thermal and avalanche breakdowns of semiconductors in secondary circuits, the converter can usually work normally in emergency short circuit mode. There are no output voltages. And with a short circuit in the power elements of the primary circuit, as a rule, the mains fuse breaks and less often the current sensor at the source of the key.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can put it out of operation in key mode or provoke the excess of maximum current or voltage values. It can be supply, damper circuits, or elements of OOS (negative feedback) stabilization. The reason for the breakdown of the power switch can be, for example, PWM (PWM) G1143LOP (8), ICE3BR0665J (Standby), CAT7581 (8). The PWM controller is usually checked by replacing a known-good one.
- There is no image, there is sound, it responds to the remote control. Or the image may appear for a second when turned on and immediately disappears.
In most of these cases, a malfunction is detected in the nodes and backlight elements of the LED panel. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
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 17MB62-2.5 motherboard should begin by checking the stabilizers and power converters needed to power the microcircuit and matrix. If necessary, update or replace the software (software). Sometimes it is necessary to check or replace (if necessary) the elements of the MainBoard board - K4T1G164QF-BCF8, 25Q80BVSIG, NAND512WEA2DN6. In cases where the BGA processor is used, its malfunction is usually detected by the local heating method.
If you suspect a malfunction of the SUT-RE216TN H 2A212E tuner, first of all, you need to verify the correctness of the software, as well as the presence of the necessary voltage levels and pulses of data exchange with the processor via the I2C bus at the corresponding terminals of the tuner.
Once again, remind users! Attempts to independently repair the TOSHIBA 23KL933R TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
The appearance of the MainBoard 17MB62-2.5 is shown in the figure below:The 17MB62-2.5 motherboard is made using the MSD9WB9PT-2 processor, combined with a scaler. For its operation, random-access memory (DDR) K4T1G164QF, or HY5PS121621C, and NAND512-A read-only memory (ROM) are used. To ensure processor power, DC / DC converters with output voltages of 1.2V, 2.5V, 3.3V are used. For DDR, the voltage is 1.8V, for NAND it is either 1.8 or 3.3V. It is advisable to start the repair by checking the supply voltage in stand-by mode (12V), 5V and 3.3V. Further, in the operating mode, it is necessary to check the operability of all linear stabilizers and DC / DC voltage converters used to power the MB and LCD panel chips. If there is a backlight and no image, depending on the type of panel used, its 5V or 12V power supply can be measured directly on the LVDS connector.
A typical malfunction of this board is a NAND software failure. At the same time, the TV does not turn on and blinks alternately with indicators on the panel. If the software of the SPI FLASH chip, in which the bootloader is located, is not damaged, NAND is updated via the USB port with standard software. Otherwise, it makes sense to try downloading the software if there is a mboot.bin file on the media, which can be used as standard SPI FLASH content.
17MB62-2.5 can be used in TVs:
TOSHIBA 19KL933R (Panel LTA185AT01), TOSHIBA 32KL933R (Panel LTA320AN12 T01), TOSHIBA 26KL933R (Panel LC260EXN (SD)(A3)), TOSHIBA 23KL933R (Panel LTM230HT10).
The appearance of the power supply
Key Features of the TOSHIBA 23KL933R:
Installed matrix (LED-panel) LTM230HT10.
The matrix control uses the Timing Controller (T-CON) LTM230HT10S2LV0.5_HF ;.
The LED driver 17CON08-2 is used to power the backlight LEDs, it is controlled by the TPS61199 PWM controller. As power elements of the LED driver, keys of the MDD1903 type are used.
The necessary supply voltages for all nodes of the TOSHIBA 23KL933R TV are generated by the 17PW80 power module, or its analogs using the G1143LOP (8), ICE3BR0665J (Standby), CAT7581 (8) microcircuits.
MainBoard - the main board (motherboard) is a 17MB62-2.5 module, using K4T1G164QF-BCF8, 25Q80BVSIG, NAND512WEA2DN6 microcircuits, and others.
Tuner SUT-RE216TN H 2A212E provides the reception of television programs and tuning to channels.
Information from an alternative source:
TOSHIBA 23KL933R
Panel Type (Matrix): LTM230HT10
Motherboard: 17MB62-2.5, K4T1G164QF-BCF8, 25Q80BVSIG, NAND512WEA2DN6, Tuner: SUT-RE216TN H 2A212E
T-con: LTM230HT10S2LV0.5_HF, LUU4321M3R-05, SM4106, 17014HS
Invertor: 17CON08-2, TPS61199, MDD1903
PSU: 17PW80, ICE3BR0655J
Remote control: CT-8023
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTM230HT10
Type: a-Si TFT-LCD, Panel
Diagonal size: 23.0 inch
Resolution: 1920x1080, FHD
Display Mode: TN, Normally White, Transmissive
Active Area: 509.76x286.74 mm
Surface: Antiglare (Haze 25%), Hard coating (3H)
Brightness: 250 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 72%
Response Time: 5 (Tr + Td)
Frequency: 60Hz
Lamp Type: 11S3P WLED Without Driver
Signal Interface: LVDS (2 ch, 8-bit), 30 pins
Voltage: 5.0V
TOSHIBA 23KL933 LED TV with LTM230HT10 LCD, 23 "(58 cm) diagonal display in 16: 9 format. The required screen brightness of 300 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.The design and technical capabilities of the TV include viewing programs and movies in high quality HD at a resolution of 1920x1080 pixels in a graphic resolution according to the standard 1080p (Full HD). and the video signal can be processed in analogue 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, DivX, MKV, VideoCD, SVCD, Picture CD, JPEG.
The power of the speaker system of sound 5 W (2x2.5 W) provide two speakers. The audio processing system NICAM STEREO is used.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, 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, 1920x1080.
A digital tuner is capable of receiving television channels in the DVB-T MPEG4, DVB-C standards.
Overall dimensions: with a support 562x394x172 mm, without a support 562x357x55 mm.
TV mass: with stand: 5 kg, without stand: 4 kg.
Attention! The LTM230HT10 panel of the TOSHIBA 23KL933 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.
