Technical description and composition of the TOSHIBA 42UL863R TV, type of panel and applicable modules. The composition of the modules.TOSHIBA LED
Model: 42UL863R
Panel: T420HF04 V.1 LED 75024795
LED backlight: 42T11-05B, cool: 73.42T15.001-2-SX1 / 73.42T15.001-2-SX1;
T-CON: T315HW07 V9 CTRL BD 31T14-C0A
LED driver (backlight): T420HF04 V0 BD 42T15-D00
Power Supply (PSU): PA-3201-01TS-LF 75022759
PWM Power: A6069H (7), FAN7930 (PFC)
MainBoard: PE0982 C main U863 75024693
IC MainBoard: TMPM330FYFG
Tuner: ENGS7305D5F
Control: CT-90382 75024860
Specifications 42UL863
TOSHIBA 42UL863R
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 42UL863R TV, as well as the external elements of the housing. Sometimes, based on visible changes in the components of the device, it is possible to draw some conclusions and determine the direction of further troubleshooting even 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 42UL863R 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, only the regulator or power converter of the control processor may be faulty, which is typical for some TOSHIBA models. 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.
Power switches in switching power supplies (SMPS) fail extremely rarely for no reason and, if they are broken, it is necessary to look for a malfunction in the stabilization circuits by checking electrolytic capacitors, semiconductor devices, and resistors in the primary circuit. The reason may be a malfunction of the PWM controller chip A6069H (7), FAN7930, which can only be checked by replacing it with a new or obviously working one.
In cases where the TOSHIBA 42UL863R TV has lost its image, and the sound is there and all the other functions are operational, there is a possibility of a malfunction of the LED driver (a converter for powering the T420HF04 V.1 LED 75024795 backlight LEDs). When you turn on the TV, the image may appear briefly and disappear immediately. It must be borne in mind that with such manifestations the LEDs themselves also fail.
In most cases of lack of backlight, it becomes necessary to disassemble the panel in order to check the LEDs, connectors, loops and all contact connections. If one or several LEDs does not work in one line, therefore, they are broken and should be replaced.
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.
Repair of the motherboard PE0982C main U863 75024693 must begin with the diagnosis and verification of all linear stabilizers or power converters of its microcircuits. Sometimes it may be necessary to update the software (software) - flashing FLASH or EEPROM.
Before replacing the tuner ENGS7305D5F, if there is no tuning to the channels, first you need to check the supply voltage at its terminals, including the power supply of varicaps (30-33V).
Once again, remind users! Attempts to independently repair the TOSHIBA 42UL863R TV without the appropriate qualifications and experience can lead to its complete non-repairability!
Repair MainBoard
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).
PSU Advanced
According to the conditions of compliance with modern world standards for household switching power supplies, the PA-3201-01TS-LF module provides for the use of a Power Factor Correction unit. The PFC circuit is a flyback converter based on the FAN7930 PWM controller. The reactance of an electrolytic capacitor of a line filter at a frequency of 50-60 Hz is usually not more than 20-30 ohms and its charge directly from the network through open diodes could reach tens of amperes per pulse, if not used no filtering.
As a result of the PFC conversion, an increased voltage on the capacitor (about 380V) cannot directly open the rectifier diodes, on the anode of which the voltage will always be slightly less (about 300V) and then its charging current will always be limited by the elements of the PWM controller. As a result, the envelope of the high-frequency pulses of the consumed current will repeat the shape and phase of the input sinusoidal voltage. The presence of an increased voltage (+ 380V) on the network capacitor indicates the serviceability of the PFC node.
The appearance of the power supply
Key Features of the TOSHIBA 42UL863R:
Installed matrix (LED-panel) T420HF04 V.1 LED 75024795.
The matrix control uses the Timing Controller (T-CON) T315HW07.
The LED driver T420HF04 is used to power the backlight LEDs.
The necessary supply voltages for all nodes of the TOSHIBA 42UL863R TV are generated by the PA-3201-01TS-LF power module or its analogs using A6069H (7), FAN7930 (PFC) microcircuits.
MainBoard - the main board (motherboard) is a PE0982 module, using TMPM330FYFG chips and others.
The ENGS7305D5F tuner provides TV reception and channel tuning
Brand: TOSHIBA, Model: 42UL863.
Briefly from the TV: LCD, LED backlight, 42 ", 1920x1080, 1080p Full HD, DVR, there is a satellite tuner, sound: 20W, HDMI connectors: 4, Internet access, Wi-Fi, Smart TV.
The official Toshiba website has firmware (software update) for models 42UL863R (19.3.61.7), 42UL863N (19.3.49.236), 42UL863G (19.3.61.14), 42UL863F (19.3.49.236), 42UL863B (19.3.61.14).
The composition uses MainBoard PE0982 C main U863 75024693 and an LCD panel (matrix) T420HF04 V.1 LED 75024795.
Power Supply Unit (PSU) PA-3201-01TS-LF 75022759 Power Supply.
TOSHIBA 42UL863 LED TV with T420HF04 LCD, 42 "(107 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 operation of the LEDs.This model uses side illumination 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 her in the graphic decomposition of the standard 1080p (Full HD).
The 42UL863 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, 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, audio x2, component, SCART, RGB, VGA, HDMI x4, USB x2, Ethernet (RJ-45), Wi-Fi . 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, DVB-S2 standards.
The power consumed by the TV in the operating mode from the network is 94 watts.
Overall dimensions: with stand 989x675x287 mm, without stand 989x607x36 mm.
TV Weight: with stand: 19.5 kg, without stand: 15.4 kg.
Attention! The T420HF04 V.1 LED panel 75024795 of the TOSHIBA 42UL863 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.