Technical description and composition of the IZUMI TLE19H103B TV, type of panel and applicable modules. The composition of the modules.IZUMI LED
Model: TLE19H103B
Chassis / Version: T.VST29.A3B
Panel: V185B1-PE1
T-CON: 1D2EC629-10000 1555 (MW1850LSC01 ROhs)
LED driver (backlight): VLD-LSLED4819000
PWM LED driver: B1T3251 (F349H T12.1)
MOSFET LED driver: BA1Y1C
Trans LED driver: bck-28-49-01-99
PWM Power: PWM SOT23-6 (K H1 35)
MainBoard: T.VST29.A3B
IC MainBoard: tsumv29le (a7mha64b), SPI FLASH: W25Q16BV
Technical Specifications TLE19H103B
IZUMI TLE19H103B
General repair guidelines for TV LCD LED
Repair of the IZUMI TLE19H103B T TV should begin with a fault diagnosis, which involves a careful inspection of the external and internal elements of the device. 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. Carbonized paint on the upper layer of resistors, electrolytic capacitors of rectifier filters swollen after boiling, cracked soldering at the terminals of heating elements or transformers can often suggest the cause of the defect and possible consequences.
In the case when the TLE19H103B 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 is probably defective in this case. If it is serviceable in such cases, it is necessary to check the stabilizer (converter) of the processor power supply on the motherboard.When diagnosing and repairing the power supply, first of all, replace the swollen filter capacitors of the secondary rectifiers 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 transistors in the primary circuit.
If a breakdown of the power switch is detected, it should be remembered that in a switching power supply (IIP) it does not fail by itself without any reasons that should be sought by checking other elements of the primary circuit - electrolytic capacitors, PWM controller H1 35, which should be checked it is possible only by replacement, as well as other semiconductor elements (diodes, transistors, zener diodes).
If the IZUMI TLE19H103B does not have an image, but there is sound, the backlight LEDs of the RF18.5-L panel 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 should be remembered that it is not possible to determine the open circuit in the LED lines without disassembling the panels with a tester or multimeter without an additional device, for example, a current source. To open all PN junctions connected in series at once, a voltage of several tens of volts may be required.
In some cases, to repair the MB (SSB) board, it may be necessary to replace the chips - tsumv29le (a7mha64b) with new or obviously good ones. In cases where BGA technologies are used, defects are usually localized by the heating method.
Attention to users! Self-repair of the IZUMI TLE19H103B TV without the appropriate qualifications and experience can lead to its complete non-repairability!
FIRMWARE FOR SPI FLASH -----------> IZUMI TLE19H103B, Main: T.VST29.A3B, Panel: RF18.5-L
The appearance of MainBoard T.VST29.A3B is shown in the figure below:T.VST29.A3B
It is advisable to start repairing the T.VST29.A3B motherboard made on the basis of the TSUMV29Xxx multifunction processor by checking the operability of linear voltage stabilizers or voltage converters necessary to provide power to the processor nodes - 1.2V core power and Stand-by 3.3V mode power. If there is no image, but the display backlight is working properly, you should check the power supply voltage of the LCD panel 5V or 12V, depending on the type of panel used.
T.VST29.A3B can be used on TVs:
IZUMI TLE15H311B (Panel LP154WE3-TLB1), IZUMI TLE19H103B (Panel V185B1-PE1 ), IZUMI TLE19H310B (Panel V185B1-PE1), SHIVAKI STV-24LED5 (Panel LM236WH1).
Main features of the IZUMI TLE19H103B device:
Installed matrix (LED-panel) V185B1-PE1.
The matrix control uses the Timing Controller (T-CON) 1D2EC629-10000.
The LED driver VLD-LSLED4819000 is used to power the backlight LEDs, it is controlled by the B1T3251 PWM controller (F349H T12.1). A transformer bck-28-49-01-99 is installed in the converter of the LED driver. As the power elements of the LED driver, keys of the type BA1Y1C are used.
The required supply voltage for all nodes of the TV IZUMI TLE19H103B provides a switching power supply using PWM SOT23-6 microcircuits (K H1 35).
MainBoard - the main board (motherboard) is a T.VST29.A3B module, using tsumv29le chips (a7mha64b), SPI FLASH: W25Q16BV and others.