Technical description and composition of the IZUMI TLE22H400B TV, type of panel and applicable modules. The composition of the modules.IZUMI LED
Model: TLE22H400B
Chassis / Version: MT8223L-V2.1
Panel: 22 inch
MainBoard: MT8223L-V2.1 CVATECH 2011.11.20
IC MainBoard: Cpu: MT8223LFMU, Spi Flash: MX25L1605, Eeprom: FT24C16, Audio amp: UTC1517P
Tuner: CDT-3FC212-36
Technical Specifications TLE22H400B
IZUMI TLE22H400B
General repair guidelines for TV LCD LED
Repair of electronic devices, including the IZUMI TLE22H400B TV, it is advisable to start with an external examination of its external and internal elements. Specific external damage to some elements can sometimes indicate further actions to determine the malfunction of the TV and localize the defect before the necessary measurements are taken. If charred resistors, swollen electrolytic or cermet capacitors, ring cracks in the solders of the terminals of transformers or heating elements are found, it is advisable to establish the causes and consequences of the malfunction that has arisen, as well as to check the connected elements and assemblies.
In cases when the IZUMI TLE22H400B TV does not turn on, does not respond to the remote control and buttons, any indicators on the front panel do not light up or blink, and there are no sounds and no signs of operability when turning on, the power module is most likely faulty or there is no processor power on motherboard (a typical defect of some IZUMI TVs). When diagnosing and repairing the power supply, after replacing the swollen capacitors of the secondary rectifier filters (if any), you must first check the mains fuse. When it is broken, the power elements of transistors and rectifier bridge diodes should be checked for avalanche (thermal) breakdown.
As a rule, the keys in switching power supplies (SMPS) are reliable enough and rarely fail for no reason to be looked for by checking other components of the circuit - electrolytic capacitors, resistors and semiconductor elements of the primary circuit. The PWM chip is verified by replacing it with a known good one.
If there is no image when IZUMI TLE22H400B is turned on, or it appears for a second and disappears, but there is sound, most likely there is a malfunction in the circuit of the panel backlight LEDs, or in their power converter. It is necessary to check the electrolytic capacitors of the filter of the secondary rectifiers in the general power supply unit.
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.
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.
In cases of attempts to repair the motherboard MT8223L-V2.1 CVATECH 2011.11.20, it is necessary to check the operability of the stabilizers or power converters of its microcircuits and, if possible, update the software (software). BGA chips can in most cases be diagnosed by local heating.
Often, the MB (SSB) card must be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - Cpu: MT8223LFMU, Spi Flash: MX25L1605, Eeprom: FT24C16, Audio amp: UTC1517P and replace failed chips with new ones. Some malfunctions may be due to the use of BGA soldering technologies in modern Main Board technologies. Typically, such defects are detected by local heating of the chip.
Before changing the tuner CDT-3FC212-36, if it is not possible to tune to television channels, make sure that there are supply voltages, including varicap power (30-33V), which must be measured on the corresponding tuner pins.
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.
FIRMWARE FOR SPI FLASH -----------> IZUMI TLE22H400B, Main: MT8223L-V2.1 CVATECH 2011.11.20
The appearance of the MainBoard MT8223L-V2.1 is shown in the figure below:MT8223L-V2.1
MT8223L-V2.1 can be used in TVs:
IZUMI TLE19H400B (Panel M185XW01 VF), IZUMI TLE22H400B (Panel 22 ").
Main features of the IZUMI TLE22H400B device:
Installed matrix (LED-panel) 22 inches.
The required supply voltage for all nodes of the TV IZUMI TLE22H400B provides a switching power supply.
MainBoard - the main board (motherboard) is an MT8223L-V2.1 module, using Cpu chips: MT8223LFMU, Spi Flash: MX25L1605, Eeprom: FT24C16, Audio amp: UTC1517P and others.
The tuner CDT-3FC212-36 provides the reception of television programs and tuning to channels.