Technical description and composition of the TOSHIBA 40L6353RK TV, type of panel and applicable modules. The composition of the modules.TOSHIBA LED
Model: 40L6353RK
Chassis / Version: L43
Panel: LSC400HM06 T01
T-CON: Y13_MB7S60TS4LV0.3
LED driver (backlight): B191-201 D32 Rev.D
PWM LED driver: OB3362RP (16)
MOSFET LED driver: P1820ATF
Power Supply (PSU): B191-201 D32 Rev.D
PWM Power: FAN7930C (PFC), SSC9522S (18), B127H (8)
MOSFET Power: P1060ATF
MainBoard: 32L4300 Rev1.02A
IC MainBoard: AO Z1017DI (8), AO Z1094DI (8), LC245, TAS5708, MSB1233C, 3547, MM1851F (5), 25Q16CVSIG (8), 456W8 (8), 24C02, TCV7103AF (8)
Tuner: TDSS-G231D
Control: CT-90429
Specifications 40L6353
TOSHIBA 40L6353RK
General repair guidelines for TV LCD LED
Repair and diagnostics of any electronic device, in particular TOSHIBA 40L6353RK, it is advisable to start with a careful external examination of internal and external elements. Visible damage to elements can sometimes indicate the direction of the search for a defect even before the necessary measurements are taken. Experienced repairmen are often aware of the causes of the defect and the possible consequences, for example, from ring cracks in the soldering of the leads of the elements, as well as from swollen capacitors or resistors burnt to coal dust and other external indirect signs.
In the case when the 40L6353RK does not turn on, does not respond to the remote control and buttons on the front panel, does not blink bulbs and does not show any signs of operability, the power supply module B191-201 D32 Rev.D is probably faulty in this case. If it is serviceable for such manifestations, it is necessary to check the stabilizer (converter) of the processor power supply on the motherboard.In diagnosing and repairing the power supply, first of all, replace the swollen capacitors of the secondary rectifier filter 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 P1060ATF transistors in the primary circuit.
It should be borne in mind that in the practice of repair it is extremely rare that key transistors in switching power supplies (SMPS) fail for no reason that should be sought by checking other components, for example, a breakdown of the key can provoke faulty elements of the damper circuits, or dried electrolytic capacitors or dangling primary resistors BP circuits involved in the stabilization process. In this case, all semiconductor elements of the strapping of the PWM regulator chip FAN7930C (8), B127H (8), which it is desirable to check by replacement, are subject to verification.
Sometimes the TOSHIBA 40L6353RK TV does not have an image, but there is sound, or the image appears and immediately disappears. In this case, there is a high probability of a malfunction of the converter for the backlight LEDs of the panel 96.40S04.002 LSC400HM06-T01, or a break in the LED circuit is possible. In such cases, first of all, it is necessary to verify the serviceability of all the electrolytic capacitors of the filter by supplying the LED driver itself, including in the power supply unit (power supply unit).
Often there is a need for disassembling the panel to check the health of the LEDs, as well as contact connections in the connectors and soldering.
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.
Repair or diagnostics of the 32L4300 Rev1.02A motherboard should begin by checking the stabilizers or power converters of its microcircuits. If necessary, you should update the software (software).
In cases of attempts to repair the MB (SSB) board, it is necessary to check the health of its elements - AO Z1017DI (8), AO Z1094DI (8), LC245, TAS5708, MSB1233C, 3547, MM1851F (5), 25Q16CVSIG (8), 456W8 (8) , 24C02, TCV7103AF (8) which may require replacement with new ones. If a BGA processor is installed, there is a possibility of a violation of the soldering of the contacts of its conclusions with the board (it is diagnosed by heating).
The TDSS-G231D tuner malfunction is established after checking the software and all the supply voltages at its terminals, including the varicap supply voltage (30-33V).
Attention to the owners! Attempts to self-repair the TOSHIBA 40L6353RK TV are not recommended by the manufacturer and can lead to serious negative consequences!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Toshiba 32L4332/L4333, 39/50/L4333, 32/39/50/L4353, 32/39/50/L4363, 40/50/L6353, 40/50/L6363, 40/50/58/L7333, 40/50/58/L7353, 40/50/58/L7363, Chassis L4300
Service Manuals with Schematic Diagrams 110 pages of 2013 on models ------------------> 32L4332, 32L4333, 39L4333, 50L4333, 32L4353, 39L4353, 50L4353, 32L4363, 39L4363, 50L4363, 40L6353, 50L6353, 40L6363, 50L6363, 40L7333, 50L7333, 58L7333, 40L7353, 50L7353, 58L7353, 40L7363, 50L7363, 58L7363
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 32L4300 is shown in the figure below:
32L4300
32L4300 can be used in TVs:
TOSHIBA 32L4353RB (Panel T320HVN04), TOSHIBA 39L4353RB (Panel T390HVN01.0 / XL), TOSHIBA 40L6353RK (Panel LSC400HM06 T01), TOSHIBA 40L7356RK (Panel LSC400HF03 T01), TOSHIBA 40L7363RK (Panel LSC400HF03 T01), TOSHIBA 50L7363RK (Panel 50 inch), TOSHIBA 32L6353RK (Panel 96.32S14.001), TOSHIBA 39L4363D (Panel T390HVN01.0 XL), TOSHIBA 50L4353RK (Panel LC500DUE (SF)(R1)).
PSU Advanced
The power module B191-201 is made using the Power Factor Correction (PFC) scheme to eliminate multiple AC harmonics introduced into the power supply by the device. The PFC assembly is a Step-Up Converter based on a FAN7930C PWM controller that evenly distributes high-frequency impulses of the charging current of the electrolytic capacitor of the rectifier filter of the mains voltage over a period of 50 Hz. The current of its charge in this case will already be determined not by its reactance (usually 10-30 ohms for the network frequency), but by the elements of the converter. As a result, a change in the amplitude of the pulses (envelope) of the consumed current of the converter will repeat the shape and phase of the input sinusoidal voltage. The availability of an increased voltage (about + 380V) in the operating mode on the capacitor of the line filter indicates the serviceability of the PFC node.
Main features of the TOSHIBA 40L6353RK device:
Installed matrix (LED-panel) LSC400HM06 T01.
The matrix control uses the Timing Controller (T-CON) Y13_MB7S60TS4LV0.3.
The LED driver B191-201 is used to power the backlight LEDs, it is controlled by the OB3362RP PWM controller (16). As power elements of the LED driver, keys of the type P1820ATF are used.
The necessary supply voltages for all nodes of the TOSHIBA 40L6353RK TV are generated by the power module B191-201, or its analogs using FAN7930C (PFC), SSC9522S (18), B127H (8) microcircuits and P1060ATF type power switches.
MainBoard - the main board (motherboard) is a 32L4300 module using AO Z1017DI (8), AO Z1094DI (8), LC245, TAS5708, MSB1233C, 3547, MM1851F (5), 25Q16CVSIG (8), 456W8 (8) microcircuits , 24C02, TCV7103AF (8) and others.
The TDSS-G231D tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LSC400HM06
Type: a-Si TFT-LCD, CELL
Diagonal size: 40 inch
Resolution: 1920x1080, FHD
Display Mode: SPVA, Normally Black, Transmissive
Active Area: 885.6x498.15 mm
Surface: Antiglare
Glass Depth: 0.70 + 0.70 mm
Transmissivity: 4.9% (with Polarizer)
Contrast Ratio: 5000: 1
Display Colors: 1.07B (10-bit), CIE1931 69%
Response Time: 8 (G to G)
Frequency: 60Hz
Signal Interface: LVDS (2 ch, 10-bit), 51 pins
Voltage: 12.0V
