Technical description and composition of the TOSHIBA 32SL733R TV, type of panel and applicable modules. The composition of the modules.TOSHIBA LED
Model: 32SL733R
Panel: LTA320HF02 75018259 LCD PANEL, LED
T-CON: S120BM4C4LV0.7 D3381F0F0525 LAUC041T0B-Q2. MAX 9694E. A1718. TPS65166 DA19XX TPS65191 4128BWP
LED driver (backlight): IB-TV-Y0061-01 / BD
Power Supply (PSU): DPS-165CP A JQ10003 JQA DELTA 75017768
PWM Power: A6069H (7), SSC9502S (18), 1607B (PFC)
MOSFET Power: K6A60D
MainBoard: PE0840 V28A001113B1
IC MainBoard: TMP91FW27UG TA5570B Si19287BGNU
Tuner: ENG37F04KF
Control: CT-90345
Specifications 32SL733
TOSHIBA 32SL733R
General repair guidelines for TV LCD LED
Repair of the TOSHIBA 32SL733R TV should begin with a fault diagnosis, which involves a careful examination of the external and internal elements of the device. Many visible changes in the state of the elements make it possible to determine the further direction of troubleshooting and localization of the defect. Carbonized paint on the upper layer of resistors, electrolytic capacitors of rectifier filters swollen after boiling, cracked soldering at the terminals of heating elements or transformers can often suggest the cause of the defect and possible consequences.
In cases when the TOSHIBA 32SL733R TV does not turn on, does not respond to the remote control and buttons, no indicators on the front panel light up or blink and there are no sounds and no signs of operability when turning on, the power supply module DPS-165CP A JQ10003 is most likely to be faulty JQA DELTA 75017768 or there is no processor power on the motherboard (a typical defect of some TOSHIBA TVs). In the general case, first of all, it is necessary to check the electrolytic capacitors of the secondary rectifier filters and the fuse at the input of the network. If it is broken, then you should check for breakdown of the PN junctions of the rectifier bridge diodes and the key transistor of the converter, which can either be on a separate radiator or integrated with a PWM controller in a common chip. Possible options K6A60D.
If a breakdown of the power switch is detected, it should be remembered that in a switching power supply (IIP) it does not fail by itself without any reasons that should be sought by checking other elements of the primary circuit - electrolytic capacitors, PWM controller A6069H (7) SSC9502S (18) 1607B (8), which can only be checked by replacement, as well as other semiconductor elements (diodes, transistors, zener diodes).
If the TOSHIBA 32SL733R TV does not have an image, but there is sound, a malfunction in the LED backlight circuits of the LTA320HF02 75018259 LCD PANEL, LED is likely. It is also necessary to check the serviceability of the electrolytic capacitors of the filter of the secondary rectifiers of the BP (power supply) for an overstated ESR.
Often in the absence of backlighting, disassembling the panel is required. It is necessary to check the serviceability of the transitions of the LEDs, as well as the reliability of the contact connections in the rulers and connectors.
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.
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).
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 - TMP91FW27UG TA5570B Si19287BGNU 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.
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 ENG37F04KF tuner.
Attention! For users and owners of 32SL733R 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 ------------------> 32/40/46SL733 main PE0840
Service Manuals with Schematic Diagrams 218 pages on models 32SL733, 40SL733, 46SL733
The appearance of MainBoard PE0840 is shown in the figure below:PE0840
PE0840 can be used in TVs:
TOSHIBA 40SL733G (Panel LTA400HF12), TOSHIBA 32SL733R (Panel LTA320HF02 75018259 LCD PANEL LED), TOSHIBA 32XV733 (Panel LC320WUD (SC)(G1)), TOSHIBA 40VL733R (Panel LTA400HF12 T04), TOSHIBA 46XV733R (Panel LTA460HJ04 T03).
PSU Advanced
The 32SL733R model uses a DPS-165CP power supply unit using the PFC (Power Factor Correction) node - an active filter of the highest harmonics of the current consumption. In fact, it is a step-up converter based on the 1607B PWM controller, which eliminates the charge current of the electrolytic capacitor of the filter of the network rectifier directly from the network through open diodes, when its charging current is determined by its reactance.
As a result of the operation of the converter, the envelope of the high-frequency pulses of the input current of the converter will repeat the shape and phase of the input voltage. The health of the PFC node can be indirectly judged by the presence of an increased constant voltage (about + 380V) on the capacitor of the rectifier network in operating mode.
Main features of the TOSHIBA 32SL733R device:
Installed matrix (LED panel) LTA320HF02 75018259 LCD PANEL, LED.
The matrix control uses the Timing Controller (T-CON) S120BM4C4LV0.7.
The LED driver IB-TV-Y0061-01 is used to power the backlight LEDs.
The necessary supply voltages for all nodes of the TOSHIBA 32SL733R TV are generated by the DPS-165CP power supply module or its analogs using A6069H (7), SSC9502S (18), 1607B (PFC) microcircuits and K6A60D type power switches.
MainBoard - the main board (motherboard) is a PE0840 module, using TMP91FW27UG TA5570B Si19287BGNU chips and others.
The ENG37F04KF tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTA320HF02
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1920x1080, FHD
Display Mode: S-PVA, Normally Black, Transmissive
Active Area: 698.4x392.85 mm
Frequency: 120Hz
TOSHIBA 32SL733 LED TV with LTA320HF02 LCD display, 32 "(81 cm) diagonal size in 16: 9 format. The required screen brightness of 450 cd / m² is provided by LED backlighting. Dynamic contrast ratio of 4000000: 1 is achieved by special control of the LEDs. V This model’s display manufacturing technology uses LED LED backlighting, and the TV’s design and technical capabilities provide for watching broadcasts and films in high quality HD at a resolution of 1920x1080 pixels in graphic resolution according to the 1080p standard (Full HD). high or video signal can be processed by analog systems, PAL, SECAM, NTSC Image processing and generation of the digital signal occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p Supported multimedia file formats:.. JPEG.
The power of the sound system 20 W (2x10 W) provides 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 x2, RGB, VGA, HDMI x4, USB x2, Ethernet (RJ-45). 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 90 watts.
Attention! The panel of the TOSHIBA 32SL733 LED TV LTA320HF02 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.
