Technical description and composition of the IZUMI TLE32H750B TV, type of panel and applicable modules. The composition of the modules.IZUMI LED
Model: TLE32H750B
Chassis / Version: T.MS18VG.81B
Panel: MT3151A05-2
LED driver (backlight): integrated into PSU
PWM LED driver: PWM 8pin
Power Supply (PSU): AY066D-4SF
PWM Power: PWM SOT23-6 LD7536R
MainBoard: T.MS18VG.81B 12145
IC MainBoard: MST6M182VG-LF-Z1, SPI Flash: 25Q32BSIG, TPA3110D2, IT6633E-P, AIC2857F
Tuner: CDT-3SP512-36
Technical Specifications TLE32H750B
IZUMI TLE32H750B
General repair guidelines for TV LCD LED
Possible malfunctions
- The IZUMI TLE32H750B TV does not turn on at all. There is no reaction to the remote control and control buttons from the front panel. Indicator lights do not light or flash.
Most often, with such manifestations, the main power module AY066D-4SF is found to be faulty. It is necessary to measure its output supply voltage, and in case of their absence, check the serviceability of the power switches of the converters and rectifier diodes for the probability of breakdown in semiconductor PN junctions.
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) PWM SOT23-6 LD7536R, 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 such cases, the most likely malfunction of the LED backlight elements. The reason can be both in the power supply of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
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 indicator blinks or lights constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the T.MS18VG.81B 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 chip replacement MST6M182VG-LF-Z1, SPI Flash: 25Q32BSIG, TPA3110D2, IT6633E-P, AIC2857F are made 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.
If there is no reception of television channels, but the TV is working properly from external devices, first of all it is necessary to check the voltage of the tuner CDT-3SP512-36 and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
Attention to users! Self-repair of the IZUMI TLE32H750B TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
Repair MainBoardThe appearance of MainBoard T.MS18VG.81B is shown in the figure below:
T.MS18VG.81B
T.MS18VG.81B can be used in TVs:
AKAI LEA-32V07P (Panel T315XW06 V.0), BBK LEM3283 V1.0 (Panel LC320EXN SDA1), BBK LEM3283F (Panel V315H3-LE4 Rev.C1), ERISSON 42LEN60 (Panel LC420EUN), ERISSON 32LEN60 (Panel LTA320AN01 D02 ), FUSION FLTV-32H20B (Panel LM315TA-T01), SUPRA STV-LC3217W (Panel LC320WXE-SBV1), SUPRA STV-LC3217AWL STV-LC3217W (Panel HV320WX2-201), SUPRA STV-LC3277W (Panel HV320WX2-201), SUPRA STV-LC32170F (Panel HK315TVM-HHC9H).
The appearance of the power supply
Main features of the IZUMI TLE32H750B device:
Installed matrix (LED panel) MT3151A05-2.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by a PWM 8pin PWM controller.
The necessary supply voltages for all nodes of the IZUMI TLE32H750B TV are generated by the AY066D-4SF power module or its analogs using PWM SOT23-6 LD7536R microcircuits.
MainBoard - the main board (motherboard) is a module T.MS18VG.81B, using microchips MST6M182VG-LF-Z1, SPI Flash: 25Q32BSIG, TPA3110D2, IT6633E-P, AIC2857F and others.
The tuner CDT-3SP512-36 provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: CSOT
Model: MT3151A05-2
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: HVA, Normally Black, Transmissive
Active Area: 697.685x392.256 mm
Surface: Antiglare (Haze 2%), Hard coating (3H)
Brightness: 300 cd / m²
Contrast Ratio: 3000: 1
Display Colors: 16.7M (8-bit), CIE1931 62%
Response Time: 6.5 (G to G)
Frequency: 60Hz
Lamp Type: WLED Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V