Technical description and composition of the TOSHIBA 19DL833R TV, type of panel and applicable modules. The composition of the modules.TOSHIBA LED
Model: 19DL833R
Chassis / Version: 17MB60-3.1
Panel: V185B1-LE2 REV. C1
LED driver (backlight): 17CON07-2
PWM LED driver: 3388DR
Power Supply (PSU): 17PW05-3
PWM Power: ICE3BR1765J (Standby), CAT7581
MOSFET Power: MDS5652
MainBoard: 17MB60-3.1
IC MainBoard: CPU: MSD9WB7PX; DRAM: HY5PS121621C; NAND Flash: NAND512-A
Tuner: DTOS403LH122E
Specifications 19DL833
TOSHIBA 19DL833R
General repair guidelines for TV LCD LED
If the TV does not turn on, no control lights are on or blinking, there are no sounds when you turn on, and there is not the slightest sign of operability - the most likely malfunction is in the power module. 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) MDS5652 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.
As a rule, the keys in switching power supplies (SMPS) are reliable enough and rarely fail for no reason to be looked for by checking other components of the circuit - electrolytic capacitors, resistors and semiconductor elements of the primary circuit. The PWM chip is verified by replacing it with a known good one.
Sometimes the TOSHIBA 19DL833R TV does not have an image, but there is sound, or the image appears and immediately disappears. In this case, there is a possibility of a malfunction of the LED driver - the power converter of the backlight LEDs of the V185B1-LE2 REV panel. C1, or a break in the LED circuit is possible. In such cases, first of all, it is necessary to verify the operability of the electrolytic capacitors of the filter by the power of the backlight unit.
A malfunction in the backlight circuits often occurs due to an open in the power circuit of the LED lines. It requires disassembling the panel and checking the LEDs themselves, the rations of their terminals, as well as the reliability of the connections in the connectors and rations of the terminals.
When trying to detect a break in the LED lines, it should be taken into account that it is difficult to do this without disassembling the panel. For example, a current source is needed to open PN junctions connected in series.
In cases of attempts to repair the 17MB60-3.1 motherboard, it is necessary to check the operability of the linear stabilizers and power converters of its microcircuits and, if possible, update the software (software). BGA chips can sometimes be diagnosed with local heating.
Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Checking or replacing CPU elements: MSD9WB7PX; DRAM: HY5PS121621C; NAND Flash: NAND512-A requires the necessary training and professional skills to repair modules at the component level. Problems associated with the use of BGA soldering technologies can be diagnosed by warming up.
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 conclusions. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus. Sometimes the cause of the inoperability of the tuner may be a software failure.
Remember! Attempts to self-repair by users of the TOSHIBA 19DL833R TV without the appropriate qualifications and the necessary experience can lead to serious negative consequences!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> TOSHIBA 19DL833R, 19DL834R, 19EL834R. Main VESTEL 17MB60
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 19DL833R device:
Installed matrix (LED-panel) V185B1-LE2 REV. C1.
The LED driver 17CON07-2 is used to power the backlight LEDs, it is controlled by the 3388DR PWM controller.
The necessary supply voltages for all nodes of the TOSHIBA 19DL833R TV are generated by the 17PW05-3 power module or its analogs using ICE3BR1765J (Standby), CAT7581 microcircuits, and MDS5652 type power switches.
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: CHIMEI INNOLUX
Model: V185B1-LE2
Type: a-Si TFT-LCD, Panel
Diagonal size: 18.5 inch
Resolution: 1366x768, WXGA
Display Mode: TN, Normally White, Transmissive
Active Area: 409.8x230.4 mm
Surface: Antiglare (Haze 25%), Hard coating (3H)
Brightness: 250 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (8-bit), CIE1931 70%
Response Time: 1.3 / 3.7 (Tr / Td)
Frequency: 60Hz
Lamp Type: 14S8P WLED Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V
Trademark: TOSHIBA, Model: 19DL833.
Briefly from the TV: LCD, LED backlight, built-in DVD player, 19 ", 1366x768, 720p HD, sound: 5W, HDMI connectors: 2.
The composition uses MainBoard 17MB60-3.1 and an LCD panel (matrix) V185B1-LE2 REV. C1.
Power Supply Unit (PSU) 17PW05-3 Power Supply.
TOSHIBA 19DL833 LED TV with V185B1-LE2 LCD, 19 "(48 cm) diagonal, 16: 9 format. The required screen brightness of 250 cd / m² is provided by LED backlighting. The ratio of maximum brightness to minimum (contrast) is 1000 : 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 th processing and the formation of the digital signal is in 480i standards, 480p, 576i, 576p, 720p, 1080i, 1080p Supported multimedia 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, audio x2, component, SCART, 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 20 watts.
Overall dimensions: with stand 462x337x159 mm, without stand 462x302x54 mm.
TV mass: with stand: 4.5 kg, without stand: 3.8 kg.
Attention! Panel V185B1-LE2 REV. The C1 TOSHIBA 19DL833 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.