Technical description and composition of the TOSHIBA 32TL838R TV, type of panel and applicable modules. The composition of the modules.TOSHIBA LED
Model: 32TL838R
Chassis / Version: PE1000
Panel: LTA320HW01 1080p Full HD
T-CON: SD120PBMB4c6LV0.1
LED driver (backlight): SSL-320-3EB
PWM LED driver: SSL100SN
Power Supply (PSU): DPS-115EP A
PWM Power: STR-A6069H (Standby), 1608B (PFC), DDA014
MainBoard: PE1000 V28A001325A1
IC MainBoard: CPU: MSD388USV-V6; NAND Flash: K4B1G1646G-BCKO; SPI Flash: M25L1606E 6.4.0V1;
Tuner: ENGS7305D5F
Specifications 32TL838
TOSHIBA 32TL838R
General repair guidelines for TV LCD LED
Any repair usually begins with an external inspection. Many visible changes in the state of the elements make it possible to determine the future direction of troubleshooting. Experienced repairmen are well aware of how ring cracks in soldered terminals look, swollen capacitors, and other causes of problems in electronic devices.
If the 32TL838R TV does not turn on, does not make any sounds when it is turned on, and also no indicators on the front panel light or blink - there is a high probability of a malfunction in the power supply module. In some cases, there may be a malfunction only in standby power. When diagnosing and repairing the power supply, after replacing the swollen capacitors of the secondary rectifier filters (if any), you must first check the mains fuse. When it is broken, the power elements of transistors and rectifier bridge diodes should be checked for avalanche (thermal) breakdown.
The reasons for the breakdown of the power switch in switching power supplies (IIPS) can be different, for example, a malfunction of semiconductor cells or electrolytic capacitors in the stabilization circuits of the primary circuit, as well as a failure in the operation of the PWM controller chip or broken resistors in its bundle.
If the TOSHIBA 32TL838R lacks an image but has sound, the LTA320HW01 1080p Full HD panel backlight LEDs or their power converter may malfunction.
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 detect a break in the LED lines without disassembling the panel, a current source is required. It is impossible to open transitions connected in series with a simple multimeter; voltage of several tens of volts is necessary.
Diagnosis and repair of the PE1000 V28A001325A1 motherboard usually begins with a test of the performance of the stabilizers and power converters of the module chips. In some cases, a software update is required.
In some cases, to repair the MB board (SSB), it may be necessary to replace the chips - CPU: MSD388USV-V6; NAND Flash: K4B1G1646G-BCKO; SPI Flash: M25L1606E 6.4.0V1; to new or obviously serviceable. In cases where BGA technologies are used, defects are usually localized by the heating method.
If you suspect a malfunction of the ENGS7305D5F tuner, first of all, you need to make sure the software is correct, as well as the presence of the necessary voltage levels at the corresponding tuner pins.
Attention! For users and owners of 32TL838R 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-serviceability of the device.
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> 32/40/46TL838/868 main PE1000ZA MSD388USV-V6, M25L1606E 6.4.0V1, TC58NVG1S3ETA00, K4B1G1646G-BCKO, RTL8201E, TAS5708
The appearance of the MainBoard PE1000 is shown in the figure below:PE1000
PE1000 can be used in TVs:
TOSHIBA 40TL838R (Panel LTA400HV01), TOSHIBA 46TL838R (Panel LTA460HW02 T01), TOSHIBA 32TL838R (Panel LTA320HW01 1080p Full HD).
PSU Advanced
On the 32TL838R TV, the DPS-115EP 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 1608B PWM controller does not allow the input rectifier filter's electrolytic capacitor to be connected to the network directly through open diodes when the reactance (about 15-30 ohms at a frequency of 50 Hz) determines the charge current. 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 32TL838R device:
Installed matrix (LED-panel) LTA320HW01 1080p Full HD.
The matrix control uses the Timing Controller (T-CON) SD120PBMB4c6LV0.1.
The LED driver SSL-320-3EB is used to power the backlight LEDs, it is controlled by the SSL100SN PWM controller.
The necessary supply voltages for all nodes of the TOSHIBA 32TL838R TV are generated by the DPS-115EP power module or its analogs using the STR-A6069H (Standby), 1608B (PFC), DDA014 microcircuits.
MainBoard - the main board (motherboard) is a PE1000 module, using CPU chips: MSD388USV-V6; NAND Flash: K4B1G1646G-BCKO; SPI Flash: M25L1606E 6.4.0V1; and others.
The ENGS7305D5F tuner provides TV reception and channel tuning.
Brand: TOSHIBA, Model: 32TL838.
Briefly from the TV: LCD, LED backlight, 32 ", 1920x1080, 1080p Full HD, 3D, sound: 20W, HDMI: 4, Internet access, Smart TV.
The composition uses MainBoard V28A001325A1 PE1000 and an LCD panel (matrix) LTA320HW01.
TOSHIBA 32TL838 LED TV with LTA320HW01 LCD display, 32 "(81 cm) diagonal size in 16: 9 format. The required screen brightness of 400 cd / m² is provided by LED backlighting. Dynamic contrast ratio of 5000000: 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 32TL838 is equipped with SMART software, integrated 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, WMA, MPEG4, Xvid, DivX, MKV, 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, 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, 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 91 watts.
Overall dimensions: with stand 735x524x240 mm, without stand 735x457x39 mm.
TV mass: with stand: 10.5 kg, without stand: 8.2 kg.
Attention! The LTA320HW01 panel of the TOSHIBA 32TL838 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.