Technical description and composition of the IZUMI TLE19H300B TV, type of panel and applicable modules. The composition of the modules.IZUMI LED
Model: TLE19H300B
Chassis / Version: HK-T.SP7050V29A
Panel: CLAA185WA 04
LED backlight: EDGE LED
LED driver (backlight): LK-LE191201A
Power Supply (PSU): Adapter 12V
MainBoard: HK-T.SP7050V29
IC MainBoard: SPI FLASH: EN25T80
Tuner: TNF931D-BFR1
Technical Specifications TLE19H300B
IZUMI TLE19H300B
General repair guidelines for TV LCD LED
Possible malfunctions
- The IZUMI TLE19H300B TV does not turn on, does not respond to the remote control and the control panel buttons, does not light up or blink indicators.
Most often, with such manifestations, the main adapter power module is found to be faulty.
The external adapter 12V power supply is not always subject to repair, especially since the owner can purchase it independently. But, in some cases, it makes sense to open it and eliminate the simple typical defects inherent in converters in pulsed sources. It is necessary to verify the presence of its output voltages and, if they are completely absent, check the power switches and rectifier diodes for a probable short circuit.
In case of any breakdowns in the secondary circuits, the converter can operate in emergency short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse or the current sensor at the source of the key more often breaks.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can put it out of operation in key mode or provoke an excess of the maximum current or voltage. These can be circuits supplying the PWM controller, damping or frequency-setting circuits, or elements of OOS (negative feedback) in the stabilization circuit. PWM controllers (PWM), in the absence of external damage and short circuit between the terminals, are checked by replacing with obviously good ones.
- There is no image, but there is sound and reaction to commands from the remote control. Or the image appears immediately after turning on and disappears.
In most of these cases, a malfunction is detected in the nodes and backlight elements of the LED panel. The reason for this may be a break in the LED circuit, or a problem in stabilizing their power supply.
To check the health in the LED circuit, it is better to use a current source with a maximum voltage of 200V. We do not recommend using any voltage sources for this purpose. You can check each LED individually with a simple Chinese multimeter (powered by 9 volts) in the P-N-junction test mode. If you connect the red probe of the multimeter to the anode of the LED, and the black to its cathode, then the 3-volt LED will light up slightly, and in the opposite direction you can detect the transition of the emergency zener diode. A zener diode PN junction indirectly indicates a LED-a
- The TV does not turn on, does not respond to the remote control. The indicator blinks or signals standby mode.
Repair or diagnostics of the HK-T.SP7050V29 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). Board repair and replacement of SPI FLASH chips: EN25T80 are carried out with the necessary equipment, and the corresponding element base. Faults associated with the application of BGA processor soldering technologies can be localized by the heating method.
Before replacing the TNF931D-BFR1 tuner, if there is no tuning for the channels, you must first check the software and supply voltage at its terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus
We recommend the owners of the TLE19H300B TV for repair only to qualified specialists with the necessary work experience! Self-repair attempts without the appropriate knowledge and skills can lead to irreversible negative consequences!
FIRMWARE FOR SPI FLASH -----------> IZUMI TLE19H300B, Main: HK-T.SP7050V29, Panel: CLAA185WA
The appearance of the MainBoard HK-T.SP7050V29 is shown in the figure below:HK-T.SP7050V29
HK-T.SP7050V29 can be used in TVs:
IZUMI TLE15H310B (Panel CLAA156WB11A), IZUMI TLE19H300B (Panel CLAA185WA 04).
Main features of the IZUMI TLE19H300B device:
Installed matrix (LED panel) CLAA185WA 04.
The LED driver LK-LE191201A is used to power the backlight LEDs.
To power all internal nodes of the IZUMI TLE19H300B TV, an external adapter 12V type is used.
MainBoard - the main board (motherboard) is an HK-T.SP7050V29 module, using SPI FLASH chips: EN25T80 and others.
The TNF931D-BFR1 tuner provides TV reception and channel tuning.