Technical description and composition of the TOSHIBA 32SL738R TV, type of panel and applicable modules. The composition of the modules.TOSHIBA LED
Model: 32SL738R
Panel: LC320EXN (SC) (A2) LED
LED driver (backlight): KLS-E3201F-07
Trans LED driver: 80GL32P-46-H BCK-14311-HA
Power Supply (PSU): 715G302-P01-H20-003U
MainBoard: 715G4357 - M01-000-005Y CBPFA4ZBZCS01
IC MainBoard: SII9187ACNU G1084-33 1084-18GM 1117-33 G5626 (8)
Tuner: ENV57S01D8RF
Control: CT-90326
Specifications 32SL738
TOSHIBA 32SL738R
General repair guidelines for TV LCD LED
Repair of electronic equipment usually begins with its external inspection and diagnosis of the malfunction. In this case, you should examine all the internal components of the TOSHIBA 32SL738R TV, as well as the external elements of the housing. Using visible changes in the state of components, it is usually possible to determine the further direction of troubleshooting and localization of the defect before the necessary measurements are taken. Elements with visible damage, for example, capacitors swelled up after boiling the electrolyte, charred resistors in certain nodes of the circuit, as well as ring cracks in solders will help the master to guess the causes and possible consequences of the malfunction.
If the TOSHIBA 32SL738R does not turn on, no control lights on the front panel light up or blink, therefore, there is a very high probability of a power supply module 715G302-P01-H20-003U malfunction. In some cases, only the processor power regulator may be faulty. When diagnosing and repairing the power supply, first of all, replace the swollen filter capacitors 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.
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 can also cause a breakdown of the power switch of the converter.
If there is no image when you turn on the TOSHIBA 32SL738R, or it appears for a second and disappears, but there is sound, most likely there is a malfunction in the backlight LED circuit of the LC320EXN (SC) (A2) LED panel, or in their power converter. It is necessary to check the electrolytic capacitors of the filter of the secondary rectifiers in the general power supply unit.
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.
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.
Diagnostics and repair of the motherboard 715G4357-M01-000-005Y CBPFA4ZBZCS01 is carried out by checking the performance of the stabilizers or power converters of the module chips. In some cases, a software update is required.
Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the elements SII9187ACNU G1084-33 1084-18GM 1117-33 G5626 (8). BGA chip malfunctions are usually easy to detect by warming up.
The malfunction of the tuner ENV57S01D8RF is established after checking the software and all the supply voltages at its terminals, including the varicap supply voltage (30-33V).
Attention to users! Self-repair of a TOSHIBA 32SL738R TV without the appropriate qualifications and experience can lead to its complete non-repairability!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Toshiba 26/32/42SL738G
Service Manuals with Schematic Diagrams 70 pages 2011 on models 26SL738G, 26SL738B, 22SL700A, 26SL700A, 26SL400A, 26AV615DB, 32SL738B.
The appearance of the MainBoard 715G4357 is shown in the figure below:715G4357
715G4357 can be used in TVs:
TOSHIBA 26SL738R (Panel LC260EXN-SCA1), TOSHIBA 32SL738R (Panel LC320EXN (SC)(A2) LED), TOSHIBA 42SL738R (Panel LC420EUD (SC)(A2)).
Main features of the TOSHIBA 32SL738R device:
Installed matrix (LED-panel) LC320EXN (SC) (A2) LED.
The LED driver KLS-E3201F-07 is used to power the backlight LEDs. The transformer 80GL32P-46-H BCK-14311-HA is installed in the LED driver converter.
The formation of the necessary supply voltages for all nodes of the TOSHIBA 32SL738R TV is carried out by the power supply module 715G302-P01-H20-003U, or its analogues.
MainBoard - the main board (motherboard) is a 715G4357 module, using SII9187ACNU G1084-33 1084-18GM 1117-33 G5626 (8) microcircuits and others.
The ENV57S01D8RF tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: LG Display
Model: LC320EXN-SCA2
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 697.685x392.256 mm
Surface: Antiglare (Haze 10%), Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 1200: 1
Display Colors: 16.7M (8-bit)
Response Time: 9 (G to G)
Frequency: 60Hz
Lamp Type: WLED Embedded (LED Driver)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
Brand: TOSHIBA, Model: 32SL738.
Briefly from the TV: LCD, LED backlight, 32 ", 1366x768, 720p HD, sound: 20W, HDMI: 3.
The Toshiba official website has firmware (software update) for the 32SL738R (2.04), 32SL738N (2.04), 32SL738G (2.04), 32SL738F (2.04) models.
The composition includes MainBoard 715G4357 - M01-000-005Y CBPFA4ZBZCS01 and LCD panel (matrix) LC320EXN (SC) (A2).
Power Supply Unit (PSU) 715G302-P01-H20-003U Power Supply.
TOSHIBA 32SL738 LED TV with LC320EXN LCD, 32 "(81 cm) diagonal size in 16: 9 format. The required screen brightness of 400 cd / m² is provided by LED backlighting. The ratio of maximum brightness to minimum (contrast) is 1200: 1 Dynamic contrast ratio of 1,000,000: 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 720p graphic decomposition (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, 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 x3, 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.
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 73 watts.
Overall dimensions: with stand 775x508x208 mm, without stand 775x479x37 mm.
TV Weight: with stand: 10.9 kg, without stand: 9.3 kg.
Attention! The LC320EXN (SC) (A2) panel of the TOSHIBA 32SL738 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.