Technical description and composition of the TOSHIBA 42Z3030DR TV, panel type and applicable modules. The composition of the modules.Toshiba
Model: 42Z3030DR
Panel: LC420WU4 (SL) (A1)
Inverter (backlight): 6632L-0406A - KUBNKM137B Rev1.1 & 6632L-0407A - KUBNKM137B Rev1.1
Power Supply (PSU): V28A00036301 - PE0282G V28A00036500
PWM Power: STR-Z4569, STR-W6765
MainBoard: PE0399 A - V28A000489B1
IC MainBoard: AV Board: PE0398A-1, AV1 Board: PE0400a
Tuner: TDQD4-003A
Specifications 42Z3030DR
TOSHIBA 42Z3030DR
General recommendations for repairing TV LCD
Repair of TVs, as well as other devices, it is advisable to start with an external examination. It often happens that visible damage to elements or connections helps determine the direction of the troubleshooting. In most cases, the repairman can guess the causes of the defect and possible consequences from the characteristic signs of typical TV defects, for example, ring cracks formed in the soldering of the element leads, swollen rectifier filter capacitors, charred resistors and other circuit elements.
If the power supply module PE0282G - V28A00036301 - V28A00036500 fails, the external manifestations may be different, for example, the TOSHIBA 42Z3030DR does not turn on at all and there is no indication of the indicator lights on the front panel. After checking the mains fuse and power elements of the primary power supply circuit, it should also check the absence of a short circuit in the loads of the secondary rectifiers.
It should be borne in mind that in the practice of repair it is extremely rare that key transistors in switching power supplies (SMPS) fail for no reason that should be sought by checking other components, for example, a breakdown of the key can provoke faulty elements of the damper circuits, or dried electrolytic capacitors or dangling primary resistors BP circuits involved in the stabilization process. In this case, all semiconductor elements of the strapping of the PWM controller chip STRW6765, EN220A, which it is desirable to check by replacement, are subject to verification.
If, when you turn on the TV, the image appears and immediately disappears, or is initially absent when you turn on, but there is sound and other functions work, there is a high probability of a malfunction of the inverter (power converter for the backlight). In such cases, the lamps, the inverter and the common power module are subject to verification, in which the electrolytic capacitors of the rectifier filter supplying the inverter should be checked. It is necessary to take into account that in cases of inverter protection shutdown (in order to be able to diagnose) there is a risk of failure of the inverter power elements and take special care. After carrying out repairs, the protection circuit must be restored for further safe operation of the TV.
Repair of the motherboard PE0399A - V28A000489B1 must begin with the diagnosis and verification of all linear stabilizers and power converters of its microcircuits. Sometimes it may be necessary to update the software (software) - flashing FLASH or EEPROM. In some cases, to repair the MB (SSB) board, it may be necessary to replace the chips - AV Board: PE0398A-1, AV1 Board: PE0400a with new or obviously working ones. In cases where BGA technologies are used, defects are usually localized by the heating method.
The TDQD4-003A tuner malfunction is established after checking the software and all supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope.
For owners of the 42Z3030DR TV, we recommend that you contact qualified personnel with experience to repair! Self-repair attempts without the appropriate knowledge and skills can lead to serious negative consequences!
- Sub Power: PE0397A, V28A00049001.
- Card Reader: PE0284, V28A000319B1,
- AV PE0398A-1, V28A000491B1, DS-1107, V28A000496B0,
- AV1 PE0400a, V28A000492A1
The appearance of the MainBoard 17MB62-2.5 is shown in the figure below:The 17MB62-2.5 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.
17MB62-2.5 can be used in TVs:
TOSHIBA 19KL933R (Panel LTA185AT01), TOSHIBA 32KL933R (Panel LTA320AN12 T01), TOSHIBA 26KL933R (Panel LC260EXN (SD) (A3)), TOSHIBA 23KL933R (Panel LTM230HT10).
The appearance of the power supply
Main features of the TOSHIBA 42Z3030DR device:
Installed matrix (LCD panel) LC420WU4 (SL) (A1).
An inverter 6632L-0406A is used to power the backlight.
The necessary supply voltages for all nodes of the TOSHIBA 42Z3030DR TV are generated by the power module V28A00036301, or its analogs using microcircuits STR-Z4569, STR-W6765.
MainBoard - the main board (motherboard) is a PE0399 module, using AV Board: PE0398A-1, AV1 Board: PE0400a and others.
The TDQD4-003A tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: LG.Philips LCD
Model: LC420WU4-SLA1
Type: a-Si TFT-LCD, Panel
Diagonal size: 42 inch
Resolution: 1920x1080, FHD
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 930.24x523.26 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 1.07B (10-bit), CIE1931 92%
Response Time: 8 (MPRT)
Frequency: 120Hz
Lamp Type: CCFL Embedded (Inverter)
Signal Interface: LVDS (4 ch, 10-bit), 92 pins
Voltage: 12.0V
Trademark: TOSHIBA, Model: 42Z3030DR.
Short from TV: LCD, 42 ", 1920x1080, 1080p Full HD, sound: 20W, HDMI: 3.
The composition uses MainBoard PE0399A (V28A000489B1) and LCD panel (matrix) LC420WU4 (SL) (A1).
Power Supply Unit (PSU) PE0282G (V28A00036301) Power Supply.
TOSHIBA 42Z3030DR LCD TV with LC420WU4 LCD, 42 "(106 cm) diagonal size in 16: 9 format. The ratio of maximum brightness to minimum (contrast) is 1000: 1. Dynamic contrast ratio of 10000: 1 is achieved by special control of the backlight. Design and the TV’s technical capabilities include watching broadcasts and movies in high quality HD at a resolution of 1920x1080 pixels in graphic resolution according to the standard 1080p (Full HD) .The input high-frequency or video signal can be processed in analogue systems PAL, SECAM, NTSC. Single processing and formation takes place in the digital signal standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p.
The power of the sound speaker system 20 W (2x10 W) provide two speakers. It uses a NICAM stereo signal processing system and Sound Surround.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, audio x3, S-Video, component, SCART x2, RGB, VGA, HDMI x3. An output for connecting headphones is provided. To connect a computer or laptop to this TV model, a VGA (D-Sub 15) connector is used on the TV case, this interface supports resolutions: 640x480, 800x600, 1024x768, 1280x1024.
A digital tuner is capable of receiving television channels in DVB-T standards.
The power consumed by the TV in the operating mode from the network is 258 watts.
Overall dimensions: with stand 1020x701x353 mm, without stand 1020x646x134 mm.
TV Weight: with stand: 28.1 kg, without stand: 24.8 kg.
Attention! The TOSHIBA 42Z3030DR LCD TV panel LC420WU4 (SL) (A1) is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!
