Technical description and composition of the TOSHIBA 46ZV555D TV, type of panel and applicable modules. The composition of the modules.Toshiba
Model: 46ZV555D
Chassis / Version: ZV555
Panel: LTA460HF02
Mainboard: PE0686
IC MainBoard: Li32626H T5CB5-6UK1 STA333W
Tuner: ENG37E05KF
Specifications 46ZV555DR
TOSHIBA 46ZV555D
General recommendations for repairing TV LCD
Repair of the TOSHIBA 46ZV555D TV is best started with a thorough external inspection and diagnosis of the malfunction. It is advisable to carefully examine the internal and external components. In some cases, visible external damage to the elements can suggest directions for troubleshooting and localizing the defect before starting the necessary measurements at the control points of the nodes of electronic circuits. Carbonized paint on the upper layer of resistors, electrolytic capacitors of rectifier filters swollen after boiling, cracked soldering at the terminals of heating elements or transformers can often suggest the cause of the defect and possible consequences.
If the TV does not turn on, no indicators on its front panel are lit or blinking. Also, if the TV does not respond to the remote control and buttons, does not make any sounds or any signs of operability when turned on, there is a certain probability that the power module is defective and needs repair. Sometimes with similar manifestations a problem can only occur in the absence of processor power, but this happens much less often. In this case, first of all, it is necessary to check the fuse at the mains input. If it is broken, then you should check for breakdown of the PN junctions of the rectifier bridge diodes and the key transistor of the N-FET converter, which can either be on a separate radiator or integrated with a PWM controller in a common chip. Possible options.
The reasons for the breakdown of the power switch of the flyback converter of the power module can be different, for example, a malfunction of semiconductor cells or electrolytic capacitors in the stabilization circuits of the primary circuit, as well as a failure in the operation of the PWM controller chip or breakage of the resistors in its bundle.
Diagnostics of power modules with a Power Factor Corrector (CMC) is somewhat more complicated and requires a more detailed approach.
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.
The operation of the power circuits of the inverter and the backlight in the normal mode are controlled by special protection, which is organized for fire safety, for example, to disconnect during short circuits or breaks in high-voltage connections or when the lamps are depressurized. This protection makes it difficult to diagnose and repair the inverter.
In these cases, special care must be taken in view of the risk of failure of the power elements. After completing all repair work, it is imperative to restore the protection circuits for full and safe further operation of the TV by the user.
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 ------------------> 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).
Main features of the TOSHIBA 46ZV555D device:
Installed matrix (LCD-panel) LTA460HF02.
The required supply voltage for all nodes of the TOSHIBA 46ZV555D 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.
The ENG37E05KF tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTA460HF02-W01
Type: a-Si TFT-LCD, Panel
Diagonal size: 46 inch
Resolution: 1920x1080, FHD
Display Mode: S-PVA, Normally Black, Transmissive
Active Area: 1018.08x572.67 mm
Surface: Antiglare (Haze 7%), Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 5000: 1
Display Colors: 1.07B (10-bit), CIE1931 90%
Response Time: 10/6 (Tr / Td); 8 (G to G)
Frequency: 120Hz
Lamp Type: 22 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (4 ch, 10-bit), 92 pins
Voltage: 12.0V
Brand: TOSHIBA, Model: 46ZV555DR.
Short from TV: LCD, 46 ", 1920x1080, 1080p Full HD, sound: 20W, HDMI: 3.
The composition uses MainBoard PE0686 and an LCD panel (matrix) LTA460HF02.
Power Supply Unit (PSU) PE0620B1 U01A 75013418 Power Supply.
TOSHIBA 46ZV555DR LCD TV with LTA460HF02 LCD, 46 "(117 cm) diagonal size in 16: 9 format. The ratio of maximum brightness to minimum (contrast) is 3000: 1. Dynamic contrast ratio of 30000: 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. kai processing and formation takes place in the digital signal standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p.
The power of the acoustic system of sound 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, 1360x768.
A digital tuner is capable of receiving television channels in DVB-T standards.
Overall dimensions: with stand 1108x753x316 mm, without stand 1108x700x94 mm.
TV Weight: with stand: 27 kg, without stand: 24.3 kg.
Attention! The TOSHIBA 46ZV555DR LCD TV panel LTA460HF02 is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!