Technical description and composition of the TOSHIBA 42ZV555D TV, type of panel and applicable modules. The composition of the modules.Toshiba
Model: 42ZV555D
Panel: LC420WUD (SA) (B1)
T-CON: 75013102
Inverter (backlight): 75013091
Mainboard: PE0686
IC MainBoard: Li32626H T5CB5-6UK1 STA333W
Tuner: ENG37E05KF V-HBVA1G5BFB
Specifications 42ZV555DR
TOSHIBA 42ZV555D
General recommendations for repairing TV LCD
Repair of the TOSHIBA 42ZV555D must begin with the diagnosis of the malfunction and a thorough inspection of its external and internal components, including the case ones. Often, by the external signs and nature of some damage, it is possible to draw preliminary conclusions and determine a further algorithm for troubleshooting. Electrolytic capacitors of filters with a swollen casing, as well as ring cracks formed in the soldered leads of heating elements, or a layer of coal on burnt resistors sometimes tell the repairman the causes of the malfunction and possible consequences.
Sometimes the TOSHIBA 42ZV555D TV simply does not turn on. No control lights on the front panel are lit or blinking, the TV does not respond to the remote control and does not make any sounds or any signs of life when turned on. The most likely cause of the malfunction is a failure of the common power module. When repairing the power supply, it is advisable to start the diagnostics by checking the mains fuse and, in the event of an open circuit, the reason should be sought in the power semiconductor elements of the pulsed flyback converter of the main PSU. First of all, it is necessary to check the diodes of the bridge of the rectifier of the mains voltage and the power switch of the converter, which can be installed separately on the radiator, or integrated with a PWM controller.
It should be borne in mind that in the repair practice it is extremely rare that key transistors of the N-FET type fail for no reason that should be looked for by checking other components, for example, a breakdown of the key can provoke faulty elements of the damper circuits, either dried electrolytic capacitors or dangling resistors of the primary circuit of the PSU, involved in the stabilization process. In this case, all semiconductor elements of the strapping of the PWM controller chip are subject to verification, which it is desirable to verify by replacement.
When using a power factor correction unit (PFC) in the power modules, troubleshooting becomes somewhat more complicated and requires additional experience and knowledge of their operation.
If the TOSHIBA 42ZV555D TV does not have an image, but there is sound, the malfunction should be sought in the power converter of the backlight (inverter). It is also necessary to check the serviceability of the electrolytic capacitors of the filter of the secondary rectifiers of the PSU (power supply) for an overstated ESR.
When repairing the inverter 75013091, it is often necessary for diagnostics to turn off the protection, which, for the purpose of fire safety, turns it off in any emergency situation, for example, during a malfunction or uneven wear of the lamps, which makes it difficult to find a defect.
In such cases, special care should be taken during diagnostics, and after completion of all repair work, it is necessary to restore the circuit and the inverter protection for further safe operation of the TV.
In cases of attempts to repair the motherboard 3 H001 75010735, it is necessary to check the operability of the power stabilizers of the microcircuits and, if possible, update the software (software).
Attention to the owners! Attempts to self-repair the TOSHIBA 42ZV555D TV are not recommended by the manufacturer and can lead to serious negative consequences!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Toshiba 32/42/46ZV555DR PE0560 PE0597 PE0624 PE0626 PE0650 PE0668 PE0686
The appearance of MainBoard PE0686 is shown in the figure below:PE0686
PE0686 can be used in TVs:
TOSHIBA 42ZV555D (Panel LC420WUD (SA)(B1)), TOSHIBA 46ZV555D (Panel LTA460HF02), TOSHIBA 46ZV555DR (Panel LTA460HF02 75013563).
Key Features of the TOSHIBA 42ZV555D:
Installed matrix (LCD panel) LC420WUD (SA) (B1).
The matrix control uses the Timing Controller (T-CON) 75013102.
An inverter 75013091 is used to power the backlight.
The required supply voltage for all nodes of the TOSHIBA 42ZV555D TV is provided by a switching power supply.
MainBoard - the main board (motherboard) is a PE0686 module, using Li32626H T5CB5-6UK1 STA333W chips and others.
Tuner ENG37E05KF V-HBVA1G5BFB provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: LG.Philips LCD
Model: LC420WUD-SAB1
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 (Haze 13%), Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 1200: 1
Display Colors: 1.06B (8-bit + FRC)
Response Time: 8 (MPRT)
Frequency: 120Hz
Lamp Type: EEFL Embedded (Inverter)
Signal Interface: LVDS (4 ch, 10-bit), 92 pins
Voltage: 12.0V
TOSHIBA 42ZV555DR LCD TV with 42 "(106 cm) diagonal LCD display, 16: 9 format. The ratio of maximum brightness to minimum (contrast) is 1200: 1. Dynamic contrast ratio of 17000: 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 analog systems PAL, SECAM, NTSC. processing and shaping of the digital signal occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p.
The power of the sound system 20 W (2x10 W) provides 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, 1360x768.
A digital tuner is capable of receiving television channels in DVB-T standards.
Overall dimensions: with stand 1009x701x316 mm, without stand 1009x649x94 mm.
TV Weight: with stand: 23.5 kg, without stand: 20.8 kg.
Attention! The TOSHIBA 42ZV555DR LCD TV panel is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!