Technical description and composition of the TOSHIBA 39L2353RB TV, type of panel and applicable modules. The composition of the modules.TOSHIBA LED
Model: 39L2353RB
Chassis / Version: L2300
Panel: T390HVN01 / 96.39S02.002
LED backlight: L1 SVT390A05_L_Rev 3.0_121114, R1 L1 SVT390A05_R_Rev 3.0_121114
LED driver (backlight): B191-102
PWM LED driver: OB3362RP (16)
MOSFET LED driver: P0550ATF, P1060ATF
Trans LED driver: LK.PL012.800 CIS04
Power Supply (PSU): 4H.S1910.011 DARFON B191-102
PWM Power: OB3362RP (16), B127H (8)
MOSFET Power: P0550ATF, P1060ATF
MainBoard: L2300 rev: 1.032.01 60EB40M1GB01P
IC MainBoard: CPU: MSD8841BX-VW; SPI Flash: 25Q64;
Tuner: TDSY-G230D
Control: IR: L2300_IR Rev1.03A
Specifications 39L2353
TOSHIBA 39L2353RB
General repair guidelines for TV LCD LED
Repair and diagnostics of any electronic device, in particular TOSHIBA 39L2353RB, it is advisable to start with a careful external examination of internal and external elements. 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. Swollen electrolytic or cermet capacitors, charred resistors, ring cracks in the soldered terminals of the elements - all this can significantly help the master to determine the causes and consequences of the malfunction of the TV.
If the power supply module 4H.S1910.011 DARFON B191-102 fails, the external manifestations may be different, for example, the TOSHIBA 39L2353RB does not turn on at all and there is no indication of the indicator lights on the front panel. With the same symptoms, the stabilizer (converter) of the power supply to the control processor may be faulty. 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 P0550ATF, P1060ATF, which are often found in such a breakdown state.
It should be remembered that in the practice of repair, usually the power switches in switching power supplies (SMPS) do not fail due to their poor quality and, in such cases, it is necessary to look for the cause that led to a malfunction and provoked a breakdown of the key. Most often, the culprits of the accident are dried electrolytic capacitors or dangling resistors in the primary circuit, or the OB3362RP (16), B127H (8) PWM controller chip itself may be faulty. It is also necessary to check all the semiconductor elements of the stabilization circuit in the primary and secondary circuits.
If the TOSHIBA 39L2353RB does not have an image but there is sound, the backlight LEDs of the panel 96.39S02.002 or their power converter may malfunction. You should also make sure that the electrolytic capacitors of the secondary rectifiers of the common power supply are working.
A malfunction in the backlight circuits often occurs due to an open in the power circuit of the LED lines. It requires disassembling the panel and checking the LEDs themselves, the rations of their terminals, as well as the reliability of the connections in the connectors and rations of the terminals.
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.
Repair of the motherboard 12012660-MB01805-60EB40M1G801P L32L2353BB YA-4A1 94V E114139 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.
If the TV works normally from external devices, but does not tune into television channels, the TDSY-G230D tuner may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding terminals, as well as the power supply of varicaps (30-33V).
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Trust the repair only to professionals with sufficient experience in the field of electronic equipment repair.
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Toshiba chassis L2300 Service manual and schematic diagram
To reduce the backlight current in LED drivers with an OB3362RP (TSOP16) controller, increase the total resistance of the resistors from pin 5 (ISET) to the chassis. The maximum current in each of the four channels (in milliamps) for the Rset resistor (in kilo-ohms) is determined from the ratio 3000 * 1.2V / Rset.
Repair MainBoard
The appearance of the MainBoard L2300 is shown in the figure below:
L2300
L2300 can be used in TVs:
TOSHIBA 32L2353RB (Panel T320HVN04.0 / LSC320HN03-T01), TOSHIBA 32W2353RB (Panel LSC320AN02-T 01), TOSHIBA 39L2353RB (Panel T390HVN01 / 96.39S02.002), TOSHIBA 50L2353RK (Panel LC500DUE SFR1), TOSHIBA 40L2453RK (Panel UNV4031Y 1823-01XU0TB), TOSHIBA 32L2454RB 32L2453RB (Panel LC320EUJ (FF)(E2)), TOSHIBA 40L2454RK (Panel UNV4031Y 1823-01XU0TB).
Main features of the TOSHIBA 39L2353RB device:
The matrix (LED panel) T390HVN01 / 96.39S02.002 is installed.
To power the backlight LEDs, the B191-102 LED driver is used, controlled by the OB3362RP PWM controller (16). In the converter of the LED driver, a transformer LK.PL012.800 CIS04 is installed. As power elements of the LED driver, keys of the type P0550ATF, P1060ATF are used.
The necessary supply voltages for all nodes of the TOSHIBA 39L2353RB TV are generated by the 4H.S1910.011 power module or its analogs using OB3362RP (16), B127H (8) microcircuits and power switches of the type P0550ATF, P1060ATF.
MainBoard - the main board (motherboard) is an L2300 module, using CPU chips: MSD8841BX-VW; SPI Flash: 25Q64; and others.
The TDSY-G230D tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: AUO
Model: T390HVN01.1 CELL
Type: a-Si TFT-LCD, CELL
Diagonal size: 39 inch
Resolution: 1920x1080, FHD
Display Mode: AMVA3, Normally Black, Transmissive
Active Area: 853.92x480.33 mm
Surface: Antiglare (Haze 2%), Hard coating (3H)
Glass Depth: 0.50 + 0.50 mm
Transmissivity: 5.4% (with Polarizer)
Contrast Ratio: 3500: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 5.5 (G to G)
Frequency: 60Hz
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V
Brand: TOSHIBA, Model: 39L2353.
Short from TV: LCD, LED backlight, 39 ", 1920x1080, 1080p Full HD, sound: 14 watts.
The composition includes MainBoard 60EB40M1GB01P (L2300 rev: 1.032.01) and LCD panel (matrix) T390HVN01.
Power Supply Unit (PSU) B191-102 Power Supply.
TOSHIBA 39L2353 LED TV with T390HVN01 LCD, 39 "(99 cm) diagonal display in 16: 9 format. The required screen brightness of 300 cd / m² is provided by LED backlighting. This model uses side backlighting from Edge LEDs. Design and the TV’s technical capabilities include watching broadcasts and films in high quality HD at a resolution of 1920x1080 pixels in graphic resolution according to the standard 1080p (Full HD). The input high-frequency or video signal can be processed in analogue systems PAL, SECAM, NTSC. and the formation of the digital signal is in 480i standards, 480p, 576i, 576p, 720p, 1080i, 1080p Supported multimedia file formats:. MP3, WMA, MPEG4, DivX, MKV, JPEG.
The power of the speaker system of sound 14 W (2x7 W) provide 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), S-Video, component, SCART, HDMI, MHL, 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, DVB-C, DVB-T2 standards.
The power consumed by the TV in the operating mode from the network is 105 watts.
Overall dimensions: with stand 891x590x200 mm, without stand 891x525x85 mm.
TV Weight: with stand: 8 kg, without stand: 7 kg.
Attention! The T390HVN01 panel of the TOSHIBA 39L2353 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.
