Technical description and composition of the TOSHIBA 22DL833R TV, type of panel and applicable modules. The composition of the modules.TOSHIBA LED
Model: 22DL833R 22DL834R
Panel: LC216EXN (SD) (A1)
LED driver (backlight): 17PW05-3
PWM LED driver: 1579 (8)
MOSFET LED driver: MDS5652 (8)
Trans LED driver: 30067936 SMP-C2776
Power Supply (PSU): 17PW05-3
PWM Power: ICE3BR0665J (Standby)
MainBoard: 17MB60-3.1
IC MainBoard: CPU: MSD9WB7PX; DRAM: HY5PS121621C; NAND Flash: NAND512-A;
Tuner: DTOS403LH122E
Control: CT-8023
Specifications 22DL833
TOSHIBA 22DL833R
General repair guidelines for TV LCD LED
Diagnostics of malfunctions and repairs of the TOSHIBA 22DL833R, as well as other electronic devices, is recommended to begin with an external examination of the external and internal elements. Specific external damage to some elements can sometimes indicate further actions to determine the malfunction of the TV and localize the defect before the necessary measurements are taken. In some cases, faulty elements can be seen with the naked eye, for example, charred resistors or swollen metal-ceramic capacitors, or electrolytic in rectifier filters. Ring cracks formed in the soldered terminals of transformers or heating elements of the circuit are also frequent sources of many malfunctions with a variety of external manifestations.
In cases when the TOSHIBA 22DL833R TV does not turn on, does not respond to the remote control and buttons, any indicators on the front panel do not light up or blink, and there are no sounds and no signs of operability when turning on, the 17PW05-3 power supply module is most likely faulty or missing processor power on the motherboard (a typical defect of some TOSHIBA TVs). When diagnosing and repairing the power supply, first of all, replace the swollen capacitors of the filter of the secondary rectifiers and check the fuse and, if it is broken, it is necessary to identify the cause. Often in such cases, an avalanche (thermal) breakdown is detected in the power semiconductor elements of the module — rectifier diodes and transistors in the primary circuit.
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 ICE3BR0665J PWM controller chip (8), which can only be checked by replacing it with a new or obviously working one.
In cases where the TOSHIBA 22DL833R TV lost the image, and the sound is there and all the other functions are functional, there is a possibility of a malfunction of the LED driver (converter for powering the backlight LEDs of the LC216EXN (SD) panel (A1)). When you turn on the TV, the image may appear briefly and disappear immediately. It must be borne in mind that with such manifestations the LEDs themselves also fail.
To check the health of the LEDs and contact connections in their power circuit, the panel must be disassembled.
To check the LED lines for breaks without disassembling the panel, for example, a current source will help. It is impossible to open series-connected PN junctions with a simple multimeter, a voltage of the order of several tens of volts is required.
When trying to repair the motherboard, you should first check the serviceability of linear stabilizers or power converters of microcircuits and, if necessary, update the software (software).
If the TV works normally from external devices, but does not tune into television channels, the DTOS403LH122E tuner may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding terminals, as well as the power supply of varicaps (30-33V).
Attention! For users and owners of 22DL833R TVs who do not have the appropriate qualifications, knowledge and experience, we categorically do not recommend attempting self-repair in order to avoid negative consequences that could lead to complete non-repairability of the device.
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Toshiba 22/26/32DL833R chassis 17MB60-3 Service manual and schematic diagram
The appearance of the MainBoard 17MB60-3.1 is shown in the figure below:The 17MB60-3.1 motherboard is made using the MSD9WB7PX-2 processor, combined with a scaler. For its work, two microchips of external random access memory (DDR) HY5PS121621C and read-only memory (ROM) NAND512-A are used. To ensure processor power, stabilizers 1.2V, 2.5V, 3.3V are used. For DDR, the voltage is 1.8V, for the power of NAND 3.3V. It is advisable to start the repair by checking the power supply of the standby mode 3.3V. Further in the operating mode, it is necessary to check the operability of all linear voltage stabilizers and converters. If there is a backlight and no image, the power of the LCD panel 5V or 12V, depending on the type of panel used, can be measured directly on the LVDS connector. A typical malfunction is a NAND ROM software failure. At the same time, the TV does not turn on and the indicators on the panel blink. It is updated via the USB port if the software of the SPI FLASH chip in which the bootloader is located is not damaged, or if there is a mboot.bin file on the media, which can be used as standard SPI FLASH content.
17MB60-3.1 can be used in TVs:
TOSHIBA 19DL834R (Panel V185B1-LE2 30070337), TOSHIBA 22DL833R 22DL834R (Panel LC216EXN (SD)(A1)), TOSHIBA 22EL833R (Panel LC216EXN-SDA1 / LC216EXN-SCA1), TOSHIBA 26DL834R (Panel LC260EXN (SD)(A3)), TOSHIBA 19DL833R (Panel V185B1-LE2 REV. C1).
The appearance of the power supply
Main features of the TOSHIBA 22DL833R device:
Installed matrix (LED-panel) LC216EXN (SD) (A1).
The LED driver 17PW05-3 is used to power the backlight LEDs, it is controlled by the 1579 PWM controller (8). The transformer 30067936 SMP-C2776 is installed in the converter of the LED driver. As power elements of the LED driver, keys of the MDS5652 type (8) are used.
The necessary supply voltages for all nodes of the TOSHIBA 22DL833R TV are generated by the 17PW05-3 power supply module or its analogs using ICE3BR0665J (Standby) microcircuits.
MainBoard - the main board (motherboard) is a 17MB60-3.1 module, using CPU chips: MSD9WB7PX; DRAM: HY5PS121621C; NAND Flash: NAND512-A; and others.
The DTOS403LH122E tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: LG Display
Model: LC216EXN-SDA1
Type: a-Si TFT-LCD, Panel
Diagonal size: 21.6 inch
Resolution: 1366x768, WXGA
Display Mode: IPS, Normally Black, Transmissive
Active Area: 477.417x268.416 mm
Surface: Antiglare (Haze 13%), Hard coating (3H)
Brightness: 300 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 68%
Response Time: 6 (G to G)
Frequency: 60Hz
Lamp Type: WLED Embedded (LED Driver)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0 ± 0.5V
Trademark: TOSHIBA, Model: 22DL833.
Shortly from the TV: LCD, LED backlight, built-in DVD player, 22 ", 1366x768, 720p HD, sound: 5W, HDMI connectors: 2.
The composition uses MainBoard 17MB60-3.1 and an LCD panel (matrix) LC216EXN (SD) (A1).
Power Supply Unit (PSU) 17PW05-3 Power Supply.
TOSHIBA 22DL833 LED TV with LC216EXN LCD display, diagonal size 22 "(56 cm) in 16: 9 format. The required screen brightness of 300 cd / m² is provided by LED backlighting. The ratio of maximum brightness to minimum (contrast) is 1000: 1 Dynamic contrast ratio of 3,000,000: 1 is achieved by special control of the LEDs. This model uses side LED backlighting from Edge LEDs. You can view images in high quality HD at a resolution of 1366x768 pixels in the standard of graphic decomposition 720p (HD Ready). Audio or 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, Xvid, 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.
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 29 watts.
Overall dimensions: with stand 530x375x155 mm, without stand 530x340x55 mm.
TV Weight: with stand: 4.3 kg, without stand: 3.9 kg.
Attention! The TOSHIBA 22DL833 LED TV panel LC216EXN (SD) (A1) 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.
