Technical description and composition of the IZUMI TLE32H330B TV, type of panel and applicable modules. The composition of the modules.IZUMI LED
Model: TLE32H330B
Panel: T320XVN01.0
LED driver (backlight): integrated into PSU
PWM LED driver: OB3362RP
Power Supply (PSU): KW-PLE320301A
PWM Power: GR8876A
MOSFET Power: MDF7N65B
MainBoard: CV181H-X
IC MainBoard: 6M181, 25Q32BVSIG_ checksum 82BA, TPA3110LD2, IT6633E-P
Tuner: CDT-3SP512-37
Technical Specifications TLE32H330B
IZUMI TLE32H330B
General repair guidelines for TV LCD LED
Diagnostics of malfunctions and repairs of IZUMI TLE32H330B, as well as other electronic devices, it is recommended to start with an external examination of the 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. In some cases, faulty elements can be seen with the naked eye, for example, charred resistors or swollen metal-ceramic capacitors, or electrolytic in rectifier filters. Ring cracks formed in the soldered terminals of transformers or heating elements of the circuit are also frequent sources of many malfunctions with a variety of external manifestations.
Faults in the KW-PLE320301A power supply module can be expressed in different ways, for example, the IZUMI TLE32H330B does not turn on at all and the control lamps on its front panel do not light up and do not blink, and there are no signs of operability. It should be noted that with the same external manifestations, the processor power regulator (converter) may be faulty. It is advisable to start the troubleshooting of the power supply module by checking the state of the electrolytic capacitors of the rectifier filters and the mains fuse. Defective capacitors should be replaced. If the mains fuse is broken, it is necessary to check first of all the power semiconductor elements - rectifier diodes and transistors, which are often found in such a state of breakdown.
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 for no reason, which should be sought by checking other elements of the primary circuit - electrolytic capacitors, PWM controller GR8870A, which can be checked only by replacement, as well as other semiconductor elements (diodes, transistors, zener diodes).
If the IZUMI TLE32H330B has no image, there is sound and the channels are switched, there is a possibility of a malfunction in the T320XVN01.0 panel backlight LED circuit, or their power converter - LED driver. Sometimes when you turn on the image appears and disappears immediately. In such cases, it is necessary to check the electrolytic capacitors of the power filter of the LED driver itself, including in the secondary rectifier of the main PSU.
Often there is a need for disassembling the panel to check the health of the LEDs, as well as contact connections in the connectors and soldering.
To check the LED lines for breaks without disassembling the panel, for example, a current source will help. It is impossible to open series-connected PN junctions with a simple multimeter, a voltage of the order of several tens of volts is required.
On the CV181H-X motherboard, in the event of a malfunction, you should first check the operation of all the stabilizers or power converters of the microcircuits and, if necessary, update the software (software).
In cases of complex repairs of MB (SSB) and in the presence of the necessary skills and equipment, sometimes it may be necessary to replace its chips 6M181, 25Q32BVSIG_ checksum 82BA, TPA3110LD2, IT6633E-P and other possible faulty components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
Before changing the tuner CDT-3SP512-37, if it is not possible to tune to television channels, make sure that there are supply voltages, including varicap supply (30-33V), which must be measured on the corresponding tuner pins.
Remember! Attempts to self-repair by users of the IZUMI TLE32H330B TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!
To reduce the backlight current in LED drivers with an OB3362RP (TSOP16) controller, increase the total resistance of the resistors from pin 5 (ISET) to the chassis. The maximum current in each of the four channels (in milliamps) for the Rset resistor (in kilo-ohms) is determined from the ratio 3000 * 1.2V / Rset.
The appearance of the MainBoard CV181H-X is shown in the figure below:The CV181H-X motherboard uses the MST6M181VG processor, combined with a scaler and installed using BGA technology.
It is advisable to start the repair of this MainBoard by checking the linear stabilizers and voltage converters necessary to provide power to the processor nodes: 1.2V, 2.5V, 3.3V. If there is no image, but the display backlight is working properly, it is necessary to check the power of the 5V or 12V LCD panel, depending on the type of panel used, which should be measured directly on the LVDS connector. If the TV does not exit Stand-by mode and does not respond to the remote control and control buttons, if the necessary supply voltages are available, the SPI Flash software should be updated.
CV181H-X can be used in TVs:
IZUMI TLE32H330B (Panel T320XVN01.0), MYSTERY MTV-3210W (Panel LC320WXE SBV2), SUPRA STV-LC27270FL (Panel M270H3-L05).
The appearance of the power supply
Main features of the IZUMI TLE32H330B device:
Installed matrix (LED-panel) T320XVN01.0.
To power the backlight LEDs, a converter is used, combined with a power supply, controlled by the OB3362RP PWM controller.
The necessary supply voltages for all nodes of the IZUMI TLE32H330B TV are generated by the KW-PLE320301A power module or its analogs using GR8876A microcircuits and MDF7N65B type power switches.
MainBoard - the main board (motherboard) is a CV181H-X module, using chips 6M181, 25Q32BVSIG_ checksum 82BA, TPA3110LD2, IT6633E-P and others.
The tuner CDT-3SP512-37 provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: AUO
Model: T320XVN01.0 CELL
Type: a-Si TFT-LCD, CELL
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: AMVA, Normally Black, Transmissive
Active Area: 697.685x392.256 mm
Surface: Antiglare (Haze 2%), Hard coating (3H)
Glass Depth: 0.50 + 0.50 mm
Transmissivity: 6.1% (with Polarizer)
Contrast Ratio: 3000: 1
Display Colors: 16.7M (8-bit), CIE1931 78%
Response Time: 6.5 (G to G)
Frequency: 60Hz
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V