Technical description and composition of the TOSHIBA 40XF350PR TV, type of panel and applicable modules. The composition of the modules.Toshiba
Model: 40XF350PR
Chassis / Version: XF350
Panel: LTA400HT-LH4
T-CON: 404652FNDSL2L V0.2 K2074F7J0D25
Inverter (backlight): SSI400HA22 REV0.7 -LJ97-01239B
PWM Inverter: SEM2006
MOSFET Inverter: AP4525GEH
Power Supply (PSU): V28A00036301 - PE0282, PE0428 V28A000529A1
PWM Power: STR-Z4569, STR-W6765
MainBoard: PE0406 V28A000527A1, SJ-75009209 PE0422A
IC MainBoard: FLI30436
Tuner: ENG37E01GF
Control: CT-90288
Specifications 40XF350PR
TOSHIBA 40XF350PR
General recommendations for repairing TV LCD
Repair of the TOSHIBA 40XF350PR must begin with the diagnosis of the malfunction and a thorough inspection of its external and internal components, including the case ones. Any external damage can sometimes prompt the repairman to take further steps to determine the malfunction of the TV and localize the defect. 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 power supply module PE0282 V28A00036301, PE0428 V28A000529A1 fails, the external manifestations may be different, for example, the TOSHIBA 40XF350PR does not turn on at all and there is no indication of the indicator lights on the front panel. If the mains fuse is broken in the power supply, in most cases a breakdown of the power switch is detected, which can be integrated with the PWM controller, or a separate field-effect transistor can be used. The rectifier bridge diodes and the electrolytic capacitor of the mains rectifier filter should also be checked.
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.
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 40XF350PR has no image, but there is sound, there is a possibility of a malfunction of the backlight or power converter. You should also make sure that the electrolytic capacitors of the secondary rectifiers of the common power supply are working.
Often, attempts to repair an SSI400HA22 REV0.7-LJ97-01239B inverter are hampered by the fact that the diagnosis of a malfunction is complicated by the operation of its protection, which is designed to turn off the inverter in emergency conditions - when the lamps are depressurized, breaks or short circuits in high-voltage connections and other emergency situations. Lock protection to localize the defect is popular among repairmen.
It should be remembered that in such cases there is a risk of failure of the power elements of the inverter and to take special care. After carrying out repairs, the protection circuit must be restored for further safe operation of the TV.
If the motherboard PE0422 V28A00525A1 is faulty, first of all it is necessary to check all the linear power regulators of its chips and, if necessary, update the software. Sometimes you can check the health of MB only by replacement.
Owners and users of the TOSHIBA 40XF350PR television must remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> 40/46XF350PR PE0282 PE0428 PE0406 PE0422 PE0400
The appearance of MainBoard PE0406 is shown in the figure below:
PE0406
PE0406 can be used in TVs:
TOSHIBA 40XF350PR (Panel LTA400HT-LH4), TOSHIBA 40XF355D (Panel LTA400HT-LH4), TOSHIBA 46XF350PR (Panel LTA460HT-LH3).
The appearance of the power supply
Key Features of the TOSHIBA 40XF350PR:
Installed matrix (LCD-panel) LTA400HT-LH4.
The matrix control uses the Timing Controller (T-CON) 404652FNDSL2L.
The SSI400HA22 inverter is used to power the backlight lamps, it is controlled by the PWM controller SEM2006. As power elements of the inverter, keys of the AP4525GEH type are used.
The necessary supply voltages for all nodes of the TOSHIBA 40XF350PR TV are generated by the power module V28A00036301, or its analogs using microcircuits STR-Z4569, STR-W6765.
MainBoard - the main board (motherboard) is a PE0406 module, using FLI30436 chips and others.
The ENG37E01GF tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTA400HT-LH4
Type: a-Si TFT-LCD, Panel
Diagonal size: 40 inch
Resolution: 1920x1080, FHD
Display Mode: S-PVA, Normally Black, Transmissive
Display Colors:, CIE1931 92%
Frequency: 60Hz
Lamp Type: CCFL
Brand: TOSHIBA, Model: 40XF350PR.
Short from TV: LCD, 40 ", 1920x1080, 1080p Full HD, sound: 20W, HDMI: 3.
The composition includes MainBoard PE0406 V28A000527A1, SJ-75009209 PE0422A and LCD panel (matrix) LTA400HT-LH4.
Power Supply Unit (PSU) PE0282 V28A00036301, PE0428 V28A000529A1 Power Supply.
TOSHIBA 40XF350PR LCD TV with LTA400HT-LH4 LCD, 40 "(102 cm) diagonal size 16: 9. The ratio of maximum brightness to minimum (contrast) is 2000: 1. Dynamic contrast ratio of 10000: 1 is achieved by special control of the backlight 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 graphic decomposition according to the standard 1080p (Full HD). The input high-frequency or video signal can be processed in analog systems PAL, SECAM, NTSC. Skye processing and the formation of the digital signal is in 480i standards, 480p, 576i, 576p, 720p, 1080i, 1080p Supported multimedia file formats:. MP3.
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.
The power consumed by the TV in the operating mode from the network is 236 watts.
Overall dimensions: with stand 934x632x302 mm, without stand 934x578x130 mm.
TV Weight: with stand: 26.9 kg, without stand: 22.2 kg.
Attention! The TOSHIBA 40XF350PR LCD TV panel LTA400HT-LH4 is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!