Technical description and composition of the TOSHIBA 37X3000PR TV, type of panel and applicable modules. The composition of the modules.Toshiba
Model: 37X3000PR
Chassis / Version: A3000P
Panel: LC370WU1 (SL) (03)
Inverter (backlight): LC370WU1
PWM Inverter: OZ9966SN (24H)
MOSFET Inverter: K4075
Power Supply (PSU): U01A 75005838 PC BOARD ASSY, PE0252A1, POWER
Mainboard: PE0288
IC MainBoard: CPU: TC90403FG; Scaler: FLI8541BE
Tuner: ENG37E01GF
Specifications 37X3000
TOSHIBA 37X3000PR
General recommendations for repairing TV LCD
It is advisable to start the diagnosis of a malfunction of the TOSHIBA 37X3000PR TV, like all others, with an external examination of possible changes, both external and internal elements. Visible damage to elements can sometimes suggest further directions for finding a defect before starting the necessary measurements. Elements with visible damage, for example, capacitors swelled up after boiling the electrolyte, charred resistors in certain nodes of the circuit, as well as ring cracks in solders will help the master to guess the causes and possible consequences of the malfunction.
In the case when the 37X3000PR does not turn on, does not respond to the remote control and buttons on the front panel, does not blink lights and does not show any signs of operability, most likely in this case the power supply module U01A 75005838 PC BOARD ASSY, PE0252A1, POWER is faulty. 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.
It should be remembered that the N-FET keys used in flyback converters rarely fail for no reason that must be sought by checking other elements of the circuit. Often the breakdown is caused by malfunctions of electrolytic capacitors or semiconductor elements in the primary circuit, or by a break in the resistors in the stabilization circuits. The PWM controller chip can also cause a breakdown of the power switch of the converter.
In cases using a power module with an active KKM, troubleshooting is sometimes somewhat more complicated.
In cases where the TOSHIBA 37X3000PR TV has lost its image, and the sound is there and all other functions are operational, there is a possibility of a malfunction of the inverter (converter for powering the backlight). When you turn on the TV, the image may appear briefly and immediately disappear. It must be borne in mind that with such manifestations, the lamps themselves also fail, the malfunction of which can be detected by replacement, by connecting to the connectors for diagnostics that are known to be serviceable and suitable in power.
Diagnostics of the LC370WU1 inverter can be difficult due to the operation of the protection, which is organized by the designers to prevent negative consequences or fires in emergency cases, for example, during short circuits or breaks in the lamp power supply circuit, as well as their possible leakage. To make the necessary measurements at control points or to take the necessary waveforms, repairmen have to block the protection circuits in order to be able to diagnose.
All necessary precautions must be observed when disabling the inverter protection during diagnostics and not leaving it disconnected after the repair is completed.
Once again, remind users! Attempts to independently repair the TOSHIBA 37X3000PR TV without the appropriate qualifications and experience can lead to its complete non-repairability!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> Toshiba 32A3000P, 37A3000P, 42A3000P, 32A3030P, 37A3030P, 42A3030P
The appearance of MainBoard PE0288 is shown in the figure below:PE0288
PE0288 can be used in TVs:
TOSHIBA 26A3000P (Panel LC260WX2 (SL)(E2) 75007721), TOSHIBA 26A3001PR (Panel V260B1-L01 75008418), TOSHIBA 32A3000P (Panel LC320WX1), TOSHIBA 32A3000PR (Panel LC320W01 (SL)(A1), TOSHIBA 37X3000PR (Panel LC370WU1 (SL)(03)), TOSHIBA 42A3000PR (Panel LC420WX7-SLC1 75008814).
Main features of the TOSHIBA 37X3000PR device:
Installed matrix (LCD-panel) LC370WU1 (SL) (03).
To power the backlight, an LC370WU1 inverter is used, it is controlled by the OZ9966SN PWM controller (24n). As power elements of the inverter, keys of the K4075 type are used.
The formation of the necessary supply voltages for all nodes of the TOSHIBA 37X3000PR TV is carried out by the power module U01A, or its analogues.
MainBoard - the main board (motherboard) is a PE0288 module, using CPU chips: TC90403FG;
Scaler: FLI8541BE and others.
The ENG37E01GF tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: LG.Philips LCD
Model: LC370WU1-SL03
Type: a-Si TFT-LCD, Panel
Diagonal size: 37 inch
Resolution: 1920x1080, FHD
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 819.36x460.89 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 1600: 1
Display Colors: 16.7M (8-bit), CIE1931 71%
Response Time: 8 (G to G)
Frequency: 60Hz
Lamp Type: 20 pcs EEFL Embedded (Inverter)
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V
Trademark: TOSHIBA, Model: 37X3000.
Short from TV: LCD, 37 ", 1920x1080, 1080p Full HD, sound: 20W, HDMI: 2.
The composition uses MainBoard PE0288 and LCD panel (matrix) LC370WU1 (SL) (03).
Power Supply Unit (PSU) U01A 75005838 Power Supply.
TOSHIBA 37X3000 LCD TV with LC370WU1 LCD display, diagonal size 37 "(94 cm) in 16: 9 format. 500 cd / m² screen brightness is ensured by backlighting with CCFL (EEFL) fluorescent lamps. The ratio of maximum brightness to minimum (contrast) is 800: 1 Dynamic contrast ratio of 3200: 1 is achieved by special control of the backlight operation.The design and technical capabilities of the TV provide for viewing broadcasts and films in high quality HD at a resolution of 1920x1080 pixels in a graphic resolution according to the standard 1080p (Full HD). A real or video signal can be processed in analogue systems PAL, SECAM, NTSC .. Graphic processing and digital signal generation takes place in the 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, component, SCART x2, RGB, VGA, HDMI x2. 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.
The power consumed by the TV in the operating mode from the network is 190 watts.
Overall dimensions: with stand 920x661x284 mm, without stand 920x613x121 mm.
TV mass: with stand: 20.5 kg, without stand: 16.8 kg.
Attention! The TOSHIBA 37X3000 LCD TV panel LC370WU1 (SL) (03) is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!