Technical description and composition of the TOSHIBA 32KL934R TV, type of panel and applicable modules. The composition of the modules.TOSHIBA LED
Model: 32KL934R
Chassis / Version: 17MB62-2.6. 93x Vestel
Panel: LTA320AN12 T01
LED driver (backlight): SSL320_0E1A Rev 0.1
PWM LED driver: SSL110SN (30),
MOSFET LED driver: 600BC (3), 08L01 BB (3)
Trans LED driver: T700 121JY
Power Supply (PSU): 17IPS19-3
PWM Power: SG6742HR (8 pin - 6742HR), ICE3BR0665J (Standby)
MOSFET Power: FQPFN50C
MainBoard: 17MB62-2.6, DVD 23026361
IC MainBoard: TPA3113D2, LD1117AL, 25Q80BVS10, 9EBR 158 (6), ZV23t (6), RT8293AH (8), 3503MP-G1 (8), ALCBF (6)
Tuner: SUT-RE216TN
Control: CT-8023
Specifications 32KL934
TOSHIBA 32KL934R
General repair guidelines for TV LCD LED
Repair of all electronic devices, including the TOSHIBA 32KL934R 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 the case when the 32KL934R does not turn on, does not respond to the remote control and buttons on the front panel, does not blink bulbs and does not show any signs of operability, the power supply module 17IPS19-3 is probably faulty in this case. If it is serviceable with such manifestations, it is necessary to check the power supply stabilizer (converter) of the processor on the motherboard. 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.
In most cases, key breakdowns in switching power supplies (SMPS) do not occur for no reason and you should look for other faulty circuit elements that could provoke a defect. This can be dried electrolytic capacitors in the primary circuit, and faulty damper elements, as well as dangling resistors or punched semiconductor elements in the stabilization circuits. Possible defective PWM ICE3BR0665J (8), TC1AB 6742HR (8) from the manufacturer.
If the TOSHIBA 32KL934R does not have an image, but there is sound, the backlight LEDs of the LTA320AN12 T01 panel or their power converter may malfunction. You should also make sure that the electrolytic capacitors of the secondary rectifiers of the common power supply are working.
Often in the absence of backlighting, disassembling the panel is required. It is necessary to check the serviceability of the transitions of the LEDs, as well as the reliability of the contact connections in the rulers and connectors.
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.
When trying to repair the motherboard, you should first check the serviceability of linear stabilizers or power converters of microcircuits and, if necessary, update the software (software).
In cases of attempts to repair the MB (SSB) board, it is necessary to check the health of its elements - TPA3113D2, LD1117AL, 25Q80BVS10, 9EBR 158 (6), ZV23t (6), RT8293AH (8), 3503MP-G1 (8), ALCBF (6) which replacement may be required for new ones. If a BGA processor is installed, there is a possibility of a violation of the soldering of the contacts of its conclusions with the board (it is diagnosed by heating).
If there is no reception of television channels, but the TV works properly from external devices, first of all it is necessary to check the voltage of the varicaps of the tuner SUT-RE216TN, which is usually within 30-33V, as well as other supply voltages at the terminals of the tuner.
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.
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Vestel Main 17MB62-2.
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> 17IPS19-4 Power Supply Scematic Diagram
Software update 32KL934R (0.6.8c) can be downloaded here
The appearance of the MainBoard 17MB62-2.6 is shown in the figure below:The 17MB62-2.6 motherboard is made using the MSD9WB9PT-2 processor, combined with a scaler. For its operation, random-access memory (DDR) K4T1G164QF, or HY5PS121621C, and NAND512-A read-only memory (ROM) are used. To ensure processor power, DC / DC converters with output voltages of 1.2V, 2.5V, 3.3V are used. For DDR, the voltage is 1.8V, for NAND it is either 1.8 or 3.3V. It is advisable to start the repair by checking the supply voltage in stand-by mode (12V), 5V and 3.3V. Further, in the operating mode, it is necessary to check the operability of all linear stabilizers and DC / DC voltage converters used to power the MB and LCD panel chips. If there is a backlight and no image, depending on the type of panel used, its 5V or 12V power supply can be measured directly on the LVDS connector.
A typical malfunction of this board is a NAND software failure. At the same time, the TV does not turn on and blinks alternately with indicators on the panel. If the software of the SPI FLASH chip, in which the bootloader is located, is not damaged, NAND is updated via the USB port with standard software. Otherwise, it makes sense to try downloading the software if there is a mboot.bin file on the media, which can be used as standard SPI FLASH content.
17MB62-2.6 can be used in TVs:
PHILIPS 19PFL2908H/60 (Panel HT185WX1-300), PHILIPS 22PFL2807H/60 (Panel LM215WF4 (TL)(G1)), PHILIPS 24PFL2908H/60 (Panel V236BJ1-LE1 Rev.C2), PHILIPS 22PFL2908H/60 (Panel M215HGE-L21 ), SHARP LC-22LE240RUX (Panel 22 "), SHARP LC-40LE240RUX (Panel LTA400HM13 C04), SHARP LC-32LE140RU LC-32LE140 (Panel LC320EXN), TOSHIBA 23KL934R (Panel LTM230HT10 75029655), TOSHIBA 32KL934R (Panel LTA320AN12 T01).
PSU Advanced
The 17IPS19-3 power supply module is made using the Power Factor Correction (PFC) scheme to filter the higher harmonics of the alternating current introduced by the device into the mains. The PFC node is a Step-Up Converter based on the ICE3BR0665J PWM controller, which evenly distributes high-frequency pulses of the charge current of the electrolytic capacitor of the rectifier filter of the left voltage evenly over a period of 50 Hz. As a result, the change in the amplitude of the pulses (envelope) of the consumed current repeats a sinusoidal shape.
The appearance of the power supply
Key Features of the TOSHIBA 32KL934R:
Installed matrix (LED-panel) LTA320AN12 T01.
The LED driver SSL320_0E1A is used to power the backlight LEDs, it is controlled by the SSL110SN (30) PWM controller. The T700 121JY transformer is installed in the LED driver converter. As power elements of the LED driver, keys of the type 600BC (3), 08L01 BB (3) are used.
The necessary supply voltages for all nodes of the TOSHIBA 32KL934R TV are generated by the 17IPS19-3 power supply module or its analogs using SG6742HR microcircuits (8 pin - 6742HR), ICE3BR0665J (Standby) and power switches of the FQPFN50C type.
MainBoard - the main board (motherboard) is a 17MB62-2.6 module, using TPA3113D2, LD1117AL, 25Q80BVS10, 9EBR 158 (6), ZV23t (6), RT8293AH (8), 3503MP-G1 (8), ALCBF (6) microcircuits ) and others.
The SUT-RE216TN tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTA320AN12
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: PVA, Normally Black, Transmissive
Active Area: 697.685x392.256 mm
Surface: Antiglare, Hard coating
Brightness: 320 cd / m²
Contrast Ratio: 4000: 1
Display Colors: 16.7M (8-bit), CIE1931 70%
Response Time: 20 (G to G)
Frequency: 60Hz
Lamp Type: WLED Embedded (LED Driver)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V