Technical description and composition of the TOSHIBA 32SL833R TV, type of panel and applicable modules. The composition of the modules.TOSHIBA LED
Model: 32SL833R
Chassis / Version: PE0961
Panel: T315HF01 V.0
T-CON: T315HW07 V9 CTRL BD 31T14-C0A
LED driver (backlight): T315HW07 V8 LED DRIVER BD 31T14-D04
PWM LED driver: MAX16814, RM5103
MOSFET LED driver: P3506DD, P1825AS
Power Supply (PSU): V71A00021400 PSLF131502A
MainBoard: PE0982 V28A001292A1
IC MainBoard: TMPM330FYFG, D2817R, RTL8304, CS48540CQZ
Tuner: ENGS7305D5F
Specifications 32SL833
TOSHIBA 32SL833R
General repair guidelines for TV LCD LED
Possible manifestations of defects
- The TOSHIBA 32SL833R does not turn on. There are no signs of operability. The indicators on the front panel do not light or flash, the TV does not respond to the remote control and control buttons.
In such cases, the fault should be sought first in the V71A00021400 power module. In the absence of the necessary supply voltages in the secondary circuits of the converters, it is necessary to check the power switches and rectifier diodes for a possible partial or complete breakdown.
In the event of breakdowns in the secondary circuits of the converter, it can usually fail in short circuit mode, and in the event of a short circuit in the power elements of the primary circuit, the mains fuse or current sensor at the source of the key most often breaks.
Breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in circuits supplying a PWM controller, frequency-setting or damper ones, as well as in negative feedback circuits (OOS) of stabilization. PWM controllers (PWM), if they do not have visible damage to the chassis and open short circuit between the terminals, are usually checked by replacement.
- There is no image, there is sound, it is responding to the remote control. Or immediately after turning on for a second, the image may appear and immediately disappear.
The most likely in these cases is a malfunction of the LED backlight. The reason can be both in the power supply of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
It is impossible to check the LED line for breaks without disassembling the panel with a multimeter or tester. For these purposes, it is necessary to open all series-connected PN junctions and a voltage of the order of tens of volts will be required, and ideally, a current source. Having disassembled the panel, it is necessary to check each LED separately. Chinese multimeters, as a rule, light up a single 3-volt LED in the forward direction. In the case of using dual 6-volt LEDs, the PN junction of its protective zener diode can serve as a health indicator. In faulty LEDs, the zener diode will either be cut off or broken into short-circuit.
- The indicator on the front panel blinks, the TV does not turn on in operating mode, it does not respond to the remote control.
Repair or diagnostics of the PE0982 motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, update or replace the software (software). Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the elements TMPM330FYFG, D2817R, RTL8304, CS48540CQZ. BGA chip malfunctions are usually easy to detect by warming up.
If the TV works normally from external devices, but does not tune to television channels, the ENGS7305D5F 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.
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Entrust repair to professionals with sufficient experience in the field of repair of electronic equipment.To reduce the backlight current in LED drivers with a PWM controller MAX16814 (TSSOP20 MAX16814B), it is necessary to proportionally increase the total resistance of the resistors from terminal 10 (SETI) to the housing. The maximum current in each of the four channels (in milliamps) for the resistance Rseti (in kilo-ohms) is determined from the ratio 1500 / Rseti.
The appearance of MainBoard PE0982 is shown in the figure below:PE0982
PE0982 can be used in TVs:
TOSHIBA 42UL863R (Panel T420HF04 V.1 LED 75024795), TOSHIBA 46SL833R (Panel T460HF02 V.1), TOSHIBA 46UL863R (Panel T460HF02 V.1), TOSHIBA 37SL833R (Panel T370HF01 V.0), TOSHIBA 32SL833R (Panel T315HF01 V.0).
The appearance of the power supply
Main features of the TOSHIBA 32SL833R device:
Installed matrix (LED panel) T315HF01 V.0.
The matrix control uses the Timing Controller (T-CON) T315HW07.
The LED driver T315HW07 is used to power the backlight LEDs, it is controlled by the PWM controller MAX16814, RM5103. As power elements of the LED driver, keys of the type P3506DD, P1825AS are used.
The formation of the necessary supply voltages for all nodes of the TOSHIBA 32SL833R TV is carried out by the power supply module V71A00021400, or its analogues.
MainBoard - the main board (motherboard) is a PE0982 module, using TMPM330FYFG, D2817R, RTL8304, CS48540CQZ chips and others.
The ENGS7305D5F tuner provides TV reception and channel tuning.
Trademark: TOSHIBA, Model: 32SL833.
Briefly from the TV: LCD, LED backlight, 32 ", 1920x1080, 1080p Full HD, sound: 20W, HDMI: 4, Internet access, Smart TV.
The Toshiba official website has firmware (software update) for the models 32SL833R (19.1.61.7), 32SL833N (19.1.49.236), 32SL833G (19.1.61.14), 32SL833F (19.1.49.236).
The composition uses MainBoard PE0982 V28A001292A1 and an LCD panel (matrix) T315HF01 V.0.
Power Supply Unit (PSU) PSLF131502A V71A00021400 Power Supply.
TOSHIBA 32SL833 LED TV with T315HF01 LCD, 32 "(81 cm) diagonal size in 16: 9 format. The required screen brightness of 450 cd / m² is provided by LED backlighting. The ratio of maximum brightness to minimum (contrast) is 4000: 1 Dynamic contrast ratio of 4,000,000: 1 is achieved by special control of the LEDs. This model uses side LED backlighting from Edge LEDs. The design and technical capabilities of the TV include viewing programs and movies in high quality HD at a resolution of 1920x1080 pixels th in graphical expansion in standard 1080p (Full HD).
The 32SL833 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, MPEG4, 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, audio x3, 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.
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 93 watts.
Overall dimensions: with stand 752x526x258 mm, without stand 752x473x36 mm.
TV Weight: with stand: 12.1 kg, without stand: 8.9 kg.
Attention! The T315HF01 V.0 panel of the TOSHIBA 32SL833 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.