Technical description and composition of the TOSHIBA 40ML933RB TV, type of panel and applicable modules. The composition of the modules.TOSHIBA LED
Model: 40ML933RB
Panel: LTA400HV04
LED backlight: LJ07-00998A
T-CON: 12PSQBC4L0.0 IS24826, RT6905, LPF12B01
LED driver (backlight): SSL400_3E1A Rev0.1
PWM LED driver: SSL110SN (30)
MOSFET LED driver: SMN04L02, MDD1902
Trans LED driver: 0025CDC UO 1230 C K
Power Supply (PSU): N150A002L REV: 01 V71A00022901
PWM Power: A6069, FAN6961 (PFC), L6577B
MainBoard: PE1063 V28A001396A1 C
IC MainBoard: K4B1G1646G-BCK0, TAS5708, DC-DC AOZ1094DI (8), V106, JH7944 TC58NVG1S3ETA00, DRV602, 4256BWP, RTL8201E, T04A5, 001C0W 1464, TCV7103AF, V1
Tuner: ENGS7305D5F
Specifications 40ML933
TOSHIBA 40ML933RB
General repair guidelines for TV LCD LED
Repair of the TOSHIBA 40ML933RB 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. In most cases, the repairman can guess the causes of the defect and possible consequences from the characteristic signs of typical TV defects, for example, ring cracks formed in the soldering of the element leads, swollen rectifier filter capacitors, charred resistors and other circuit elements.
If the TOSHIBA 40ML933RB does not turn on, no control lights on the front panel light up or blink, therefore, there is a very high probability of a malfunction of the V71A00022901 N150A002L REV: 01 power module. In some cases, only the processor power regulator may be faulty. It is advisable to start the troubleshooting of the power supply module by checking the state of the electrolytic capacitors of the rectifier filters and the mains fuse. Defective capacitors should be replaced. If the mains fuse is broken, it is necessary to check first of all the power semiconductor elements - rectifier diodes and transistors, which are often found in such a state of breakdown.
Mos-Fet keys used in switching power supplies (SMPS) rarely fail for no reason to look for when checking other circuit elements. Often the breakdown is caused by malfunctions of electrolytic capacitors or semiconductor elements in the primary circuit, or by a break in the resistors in the stabilization circuits. The PWM controller chip A6069H (8) can also cause a breakdown of the power switch of the converter.
If, when you turn on the TV, the image appears and immediately disappears, or is absent initially when you turn on, but the sound is there and other functions work, there is a high probability of a malfunction of the LED driver (power converter for the backlight LEDs of the LTA400HV04 panel). In such cases, the general power module is also subject to verification, in which the electrolytic capacitors of the rectifier filter supplying the LED driver should be checked.
Often in the absence of backlighting, disassembling the panel is required. It is necessary to check the health of the transitions of the LEDs, as well as the reliability of the contact connections in the lines and connectors.
It should be remembered that it is not possible to determine the break in the LED lines without disassembling the panels using 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.
The motherboard PE1063 V28A001396A1 C must be checked if there is no reaction to the remote control and function buttons, the standby indicator blinks or lights up continuously. In such cases, if the converters or power regulators of the microcircuit are working, a software update may be necessary.
In cases of attempts to repair the MB board (SSB), it is necessary to check the health of its elements - K4B1G1646G-BCK0, TAS5708, DC-DC AOZ1094DI (8), V106, JH7944 TC58NVG1S3ETA00, DRV602, 4256BWP, RTL8201E, T04A5, 001C, TCL1014, 001, 001, 001, 001, 001 replacement may be required for new ones. If a BGA processor is installed, there is a possibility of a violation of the soldering of the contacts of its conclusions with the board (it is diagnosed by heating).
In cases where there is no tuning to the local television channels, you should make sure that there is a varicap supply voltage (30-33V) and other supply voltages at the terminals of the ENGS7305D5F tuner.
Attention to users! Independent repair of the TOSHIBA 40ML933RB TV without the appropriate qualifications and experience can lead to its complete non-repairability!
Service Manuals with Schematic Diagrams 134 pages 2012 on model ------------------> 32TL933, 40TL933, 46TL933, 32TL936, 40TL936, 46TL936, 32TL963, 40TL963, 46TL963, 32TL966, 40TL966, 46TL966, 32UL975, 40UL975, 46UL975, 23RL933, 32RL933, 40RL933, 23RL936, 32RL936, 40RL936, 23SL970, 32SL970, 40SL970, 32RL953, 40RL953, 42VL963, 47VL963, 55VL963, 42XL975, 47XL975, 55XL975, 40ML933, 46ML933
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> 32/40/46TL933/TL963 main PE1063ZA
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Toshiba 32/40/46/TL933, 32/40/46/TL936, 32/40/46/TL963, 32/40/46/TL966, 32/40/46/UL975, 23/32/40/RL933, 23/32/40/RL936, 23/32/40/SL970, 32/40/RL953, 42/47/55/VL963, 42/47/55/XL975, 4046ML933 Main PE1080
The appearance of MainBoard PE1063 is shown in the figure below:
PE1063
PE1063 can be used in TVs:
TOSHIBA 32TL963RB (Panel V315H3-LS5 Rev C1 . 75028476), TOSHIBA 40ML933RB (Panel LTA400HV04), TOSHIBA 40ML963RB (Panel LTA400HV04), TOSHIBA 40TL933R (Panel 40 inch), TOSHIBA 40TL933RB (Panel LTA400HV04), TOSHIBA 40TL963RB (Panel LTA400HV04 T01), TOSHIBA 46ML963RB (Panel LTA460HW04), TOSHIBA 32TL933RB (Panel LTA320HW01), TOSHIBA 46ML933RB (Panel LTA460HW04).
PSU Advanced
On the 40ML933RB TV, the N150A002L power module is installed using the PFC (Power Factor Correction) scheme acting as an active filter to eliminate the higher harmonic components of the current consumption. The boost converter based on the FAN6961 PWM controller does not allow the electrolytic capacitor of the input rectifier filter to be connected directly to the network directly through open diodes, when the value of the charge current determines its reactance (about 15-30 ohms at a frequency of 50 Hz). As a result of the conversion, the charging current of the capacitor will be determined in such a way that the envelope of the high-frequency pulses of the input current will repeat the phase and shape of the sine wave of the input voltage. The health check of the PFC unit is carried out by measuring the DC voltage on the capacitor of the rectifier network. In operating mode, it should be around 380V, in standby approximately 300V.
The appearance of the power supply
Main features of the TOSHIBA 40ML933RB device:
Installed matrix (LED-panel) LTA400HV04.
The matrix control uses the Timing Controller (T-CON) 12PSQBC4L0.0.
The LED driver SSL400_3E1A is used to power the backlight LEDs, it is controlled by the SSL110SN PWM controller (30). A transformer 0025CDC UO 1230 C K is installed in the LED driver converter. Keys of the type SMN04L02, MDD1902 are used as power elements of the LED driver.
The necessary supply voltages for all nodes of the TOSHIBA 40ML933RB TV are generated by the power module N150A002L, or its analogs using A6069, FAN6961 (PFC), L6577B microcircuits.
MainBoard - the main board (motherboard) is a PE1063 module, using K4B1G1646G-BCK0, TAS5708, DC-DC AOZ1094DI (8), V106, JH7944 TC58NVG1S3ETA00, DRV602, 4256BWP, RTL8201E, T04F5, 1404B164, T04A564 others.
The ENGS7305D5F tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTA400HV04
Type: a-Si TFT-LCD, Panel
Diagonal size: 40 inch
Resolution: 1920x1080, FHD
Display Mode: S-PVA, Normally Black, Transmissive
Active Area: 885.6x498.15 mm
Surface: Antiglare (Haze 2%)
Brightness: 400 cd / m²
Contrast Ratio: 5000: 1
Display Colors: 1.07B (8-bit + Hi-FRC), CIE1931 70%
Response Time: 8 (Max.) (G to G)
Frequency: 120Hz
Lamp Type: WLED Embedded (LED Driver)
Signal Interface: LVDS (4 ch, 10-bit), 92 pins
Voltage: 12.0V
Trademark: TOSHIBA, Model: 40ML933.
Briefly from the TV: LCD, LED backlight, 40 ", 1920x1080, 1080p Full HD, 3D, DVR, sound: 20W, HDMI: 2, Smart TV.
The composition uses MainBoard PE1063 V28A001396A1 C and an LCD panel (matrix) LTA400HV04.
Power Supply Unit (PSU) N150A002L REV: 01 V71A00022901 Power Supply.
TOSHIBA 40ML933 LED TV with LTA400HV04 LCD display, 40 "(102 cm) diagonal size in 16: 9 format. The required screen brightness of 400 cd / m² is provided by LED backlighting. Dynamic contrast ratio of 1,000,000: 1 is achieved by special control of the LEDs. V This model uses side lighting from Edge LEDs.
There is support for 3D images with active (shutter) technology for separating the right and left channels. The design and technical capabilities of the TV include watching programs and movies in high quality HD at a resolution of 1920x1080 pixels in a graphical decomposition according to the standard 1080p (Full HD).
The 40ML933 is equipped with SMART software, embedded applications and the ability to work on the Internet. Connecting to the Internet can be done via Wi-Fi. The input high-frequency 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, MKV, JPEG.
The power of the acoustic system of sound 20 W (2x10 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, VGA, HDMI x2, USB, WiDi. 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.
The power consumed by the TV in the operating mode from the network is 109 watts.
Overall dimensions: with stand 923x613x215 mm, without stand 923x555x56 mm.
TV Weight: with stand: 14.5 kg, without stand: 12.5 kg.
Attention! The LTA400HV04 panel of the TOSHIBA 40ML933 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.