Technical description and composition of the TOSHIBA 46XF350PR TV, type of panel and applicable modules. The composition of the modules.Toshiba
Model: 46XF350PR 46XF350PG
Panel: LTA460HT-LH3
T-CON: 75012995 404652FHDSC4LV0.0
Inverter (backlight): SS1460HD24-M (S) REV0.2 75012994
Power Supply (PSU): PE0401 V28A000553A1 - V28A000554A0
PWM Power: STR-Z4579, STR-W6765, STR-A6169 (Standby DIP-8), FA5501AP (PFC)
MOSFET Power: FP20W60C3 (PFC)
MainBoard: PE0406 A1, PE0422 - V28A000525A, PE0400A - V28A000492A1
Tuner: ENG37E01GF
Control: Remote: CT-90288, IR: PE0406A-2 V28A000527A2
Specifications 46XF350PR
TOSHIBA 46XF350PR
General recommendations for repairing TV LCD
It is advisable to start any repair and diagnostics of the TOSHIBA 46XF350PR TV with a careful external examination of the internal and external elements, including case parts, display, buttons and cables. Any external damage can sometimes prompt the repairman to take further steps to determine the malfunction of the TV and localize the defect. Swollen electrolytic or cermet capacitors, charred resistors, ring cracks in the soldered terminals of the elements - all this can significantly help the master to determine the causes and consequences of the malfunction of the TV.
In the absence of any signs of operability, when the TOSHIBA 46XF350PR does not turn on and does not signal anything with the control lights on the panel, the PE0401C1 PE0473B1 power supply module is most likely to be 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 in the practice of repair, usually the power keys of N-Fet converters do not fail due to their poor quality and, in such cases, it is necessary to look for the cause that led to a malfunction and provoked a breakdown of the key. Most often, the culprits of the accident are dried electrolytic capacitors or dangling resistors in the primary circuit, or the PWM controller chip itself may be faulty. It is also necessary to check all the semiconductor elements of the stabilization circuit in the primary and secondary circuits.
In cases where the Power Factor Corrector (PFC) is used in the power supply, troubleshooting can be a bit more complicated.
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.
Often, attempts to repair the SS1460HD24-M (S) REV0.2 75012994 inverter are hampered by the fact that the diagnosis of the 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.
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.
On the PE0406A1 motherboard, in case of a malfunction, you should first check the performance of all power supply stabilizers of the microcircuits and, if necessary, update the software (software).
Owners of the 46XF350PR TV are advised to contact qualified professionals with experience for repairs! Self-repair attempts without the appropriate knowledge and skills can lead to serious negative consequences!
SCHEMATIC DIAGRAM / SERVICE MANUAL ------------------> 40/46XF350PR PE0282 PE0428 PE0406 PE0422 PE0400
SCHEMATIC DIAGRAM / psu ------------------> PE0401 Power Supply
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).
PSU Advanced
The PE0401 power module is made using the Power Factor Correction (PFC) scheme to eliminate multiple AC harmonics introduced into the power supply by the device. The PFC is a Step-Up Converter based on the FA5501AP PWM controller, which evenly distributes high-frequency impulses of the charging current of the electrolytic capacitor of the rectifier filter of the mains voltage over a period of 50 Hz. The current of its charge in this case will already be determined not by its reactance (usually 10-30 ohms for the network frequency), but by the elements of the converter. As a result, a change in the amplitude of the pulses (envelope) of the consumed current of the converter will repeat the shape and phase of the input sinusoidal voltage. The availability of an increased voltage (about + 380V) in the operating mode on the capacitor of the line filter indicates the serviceability of the PFC node.
The appearance of the power supply
Key Features of the TOSHIBA 46XF350PR:
Installed matrix (LCD panel) LTA460HT-LH3.
The matrix control uses the Timing Controller (T-CON) 75012995.
To power the backlight used inverter SS1460HD24-M (S).
The necessary supply voltages for all nodes of the TOSHIBA 46XF350PR TV are generated by the PE0401 power module or its analogs using the STR-Z4579, STR-W6765, STR-A6169 (Standby DIP-8), FA5501AP (PFC) microcircuits and power switches of the FP20W60C3 (PFC) type )
MainBoard - the main board (motherboard) is a PE0406 module.
The ENG37E01GF tuner provides television reception and channel tuning.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTA460HT-LH3
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
Brightness: 500 cd / m²
Contrast Ratio: 2000: 1
Display Colors: 1.07B (10-bit), CIE1931 92%
Response Time: 8 (G to G)
Frequency: 60Hz
Lamp Type: 22 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (2 ch, 10-bit), 51 pins
Voltage: 12.0V
Trademark: TOSHIBA, Model: 46XF350PR.
Short from TV: LCD, 46 ", 1920x1080, 1080p Full HD, sound: 20W, HDMI: 3.
The composition includes MainBoard PE0406 A1, PE0422 (V28A000525A), PE0400A (V28A000492A1) and LCD panel (matrix) LTA460HT-LH3.
Power Supply Unit (PSU) PE0401 V28A000553A1 Power Supply.
TOSHIBA 46XF350PR LCD TV with LTA460HT-LH3 LCD, 46 "(117 cm) diagonal size 16: 9. The ratio of maximum brightness to minimum (contrast) is 1800: 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 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.
The power consumed by the TV in the operating mode from the network is 284 watts.
Overall dimensions: with stand 1070x713x302 mm, without stand 1070x659x135 mm.
TV Weight: with stand: 33.8 kg, without stand: 28.9 kg.
Attention! The TOSHIBA 46XF350PR's LCD panel LTA460HT-LH3 is the most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!