Technical description and composition of the IZUMI TL32H700B TV, type of panel and applicable modules. The composition of the modules.Izumi
Model: TL32H700B
Chassis / Version: T.MS18VG.21B11513
Panel: T320B6-P01-C06
Inverter (backlight): integrated into PSU
PWM Inverter: OB3309
Power Supply (PSU): AY115L-4HF01
PWM Power: PWM SOT23-6
MainBoard: T.MS18VG.21B11513
IC MainBoard: CPU: B MST6E182VG-LF-Z1, SPI FLASH: 25Q32BVSIG, TPA312402, IT6633E-P, SGM330A
Tuner: CDT-3SP5I2-36
Technical Specifications TL32H700B
IZUMI TL32H700B
General recommendations for repairing TV LCD
Possible malfunctions
- The IZUMI TL32H700B TV does not turn on at all. The control lights do not light or flash. The TV on the remote control and the control panel buttons do not respond.
Often in such cases, the AY115L-4HF01 power module is faulty. It is then necessary to measure its output voltages and, if they are absent, it is necessary to check the power switches and rectifier diodes of the converters for a short-circuit probability.
In case of diode breakdowns in the secondary circuits, the converter can operate in emergency short-circuit mode without output voltages, and during short circuit in the power elements of the primary circuit, the mains fuse and / or current sensor at the source of the key usually breaks.
Breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in circuits supplying a PWM controller, frequency-setting or damper ones, as well as in negative feedback circuits (OOS) of stabilization. PWM controllers (PWM) PWM SOT23-6, if they do not have visible damage to the case and open short circuit between the terminals, are usually checked by replacement.
- There is no image, there is sound, it responds to the remote control. Or the image may appear for a second when turned on and immediately disappears.
These manifestations can be triggered by the power module, or by inverter defects, as well as by the distortion of the currents in the lamps due to their uneven wear. After checking all the electrolytic capacitors of the filters that are involved in the power supply of the inverter, it is necessary to ring in its converter the power switches for breakdown and the secondary windings of the transformers for an open.
Sometimes, for diagnostic purposes, inverter protection must be disabled. In such cases, special care must be taken during work, and the protection circuits should be restored immediately after the repair is completed.
- 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.21B11513 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). Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the CPU elements: B MST6E182VG-LF-Z1, SPI FLASH: 25Q32BVSIG, TPA312402, IT6633E-P, SGM330A. BGA chip malfunctions are usually easy to detect by warming up.
The malfunction of the tuner CDT-3SP5I2-36 is established after checking the software and all the supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope.
TV users and owners need to remember that attempts to repair the IZUMI TL32H700B TV independently, without the appropriate qualifications and necessary experience, can lead to serious negative consequences!
FIRMWARE FOR SPI FLASH -----------> IZUMI TL32H700B, Main: T.MS18VG.21B11513, Panel: T320B6-P01-C06
The appearance of MainBoard T.MS18VG.21B11513 is shown in the figure below:T.MS18VG.21B11513
The appearance of the power supply
Main features of the IZUMI TL32H700B device:
Installed matrix (LCD panel) T320B6-P01-C06.
To power the backlight, a converter is used, combined with a power supply, controlled by the OB3309 PWM controller.
The necessary supply voltages for all nodes of the IZUMI TL32H700B TV are generated by the AY115L-4HF01 power module, or its analogs using PWM SOT23-6 microcircuits.
MainBoard - the main board (motherboard) is a module T.MS18VG.21B11513, using CPU chips: B MST6E182VG-LF-Z1, SPI FLASH: 25Q32BVSIG, TPA312402, IT6633E-P, SGM330A and others.
The tuner CDT-3SP5I2-36 provides the reception of television programs and tuning to channels.
