Technical description and composition of the SAMSUNG LE40R82B TV, type of panel and applicable modules. The composition of the modules.SAMSUNG
Model: LE40R82B
Chassis / Version: GBP40SEN
Panel: LTA400WT-L06 // LTA400WT-L07
T-CON: 4046HDCM4LV0.2
Inverter (backlight): SSB400WA16V REV 0.1 BN41-00863A
PWM Inverter: LX1691A
Power Supply (PSU): BN44-00167A
PWM Power: ICE3B0365J (Standby), ICE1PCS02 (PFC)
MOSFET Power: FQA13N50CF, FSDM0565REWDTU
MainBoard: BN94-01311G
IC MainBoard: SGTV5810C, SII9185CTU, AT24C256BN, AP358
Tuner: TCLW3001PD32S (H)
Control: Remote: BN59-00602A, IR: BN41-00868A
Technical specifications LE40R82B
SAMSUNG LE40R82B
General repair guidelines for TV LCD
Repair of the SAMSUNG LE40R82BX TV should begin with a careful external inspection and diagnosis of the malfunction. In this case, it is advisable to carefully examine both internal and external components. Often, based on certain external signs, it is possible to draw some conclusions about the reasons for the failure of certain elements of the circuit even before the necessary measurements are made, which will determine the further algorithm for troubleshooting and localizing the defect. In some cases, faulty elements are visible to the naked eye, for example, charred resistors or swollen metal-ceramic capacitors, or electrolytic in rectifier filters. Ring cracks formed in the soldered terminals of transformers or heating elements of the circuit are also frequent sources of many malfunctions with a variety of external manifestations.
If the SAMSUNG LE40R82BX does not turn on, no control lights on the front panel light up or blink, therefore, there is a very high probability of a BN44-00165A power supply module malfunctioning. When diagnosing and repairing the BN44-00165A power supply, first of all, it is necessary to check the fuse, and if it breaks, the power switch and rectifier bridge diodes should be checked for avalanche (thermal) breakdown.
In most cases, a breakdown of the N-Fet converter key does not occur for no reason and you should look for other faulty circuit elements that could provoke a defect. This can be dried electrolytic capacitors in the primary circuit, and faulty damper elements, as well as dangling resistors or punched semiconductor elements in the stabilization circuits. Possible defective PWM chip from the manufacturer.
Diagnostics of power modules with a Power Factor Corrector (CMC) is somewhat more complicated and requires a more detailed approach.
If the SAMSUNG LE40R82BX TV does not have an image, but there is sound, the malfunction should be sought in the backlight lamp power converter (inverter). It is also necessary to check the serviceability of the electrolytic capacitors of the filter of the secondary rectifiers of the BP (power supply) for an overstated ESR.
Often, attempts to repair the SSB400WA16V Rev0.1 inverter are hampered by the fact that the fault diagnosis 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.
When diagnosing with the protection off, special precautions must be taken, because there is a risk of failure of the power elements of the inverter. After the diagnosis, it is imperative to restore the protection circuits for the inverter to operate normally.
In cases of attempts to repair the motherboard BN41-00839E BN94-01441L, it is necessary to check the operability of the power supply circuits of the microcircuits and, if possible, update the software (software).
Once again, remind users! Attempts to self-repair a SAMSUNG LE40R82BX TV without the appropriate qualifications and experience can lead to its complete non-repairability.....................
The appearance of the MainBoard BN94-01311G is shown in the figure below:BN94-01311G
BN94-01311G can be used in TVs:
SAMSUNG LE40R82B (Panel LTA400WT-L06), SAMSUNG LE40R81B (Panel LTA400WT-L07).
PSU Advanced
The power module BN44-00167 is made using the Power Factor Correction (PFC) scheme to eliminate multiple AC harmonics introduced by the device into the mains. The PFC node is a Step-Up Converter based on the ICE1PCS02 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 the 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
Main features of the SAMSUNG LE40R82B device:
Installed matrix (LCD panel) LTA400WT-L06 or LTA400WT-L07.
The matrix control uses the Timing Controller (T-CON) 4046HDCM4LV0.2.
To power the backlight, an SSB400WA16V inverter is used, it is controlled by the LX1691A PWM controller.
The necessary supply voltages for all nodes of the SAMSUNG LE40R82B TV are generated by the BN44-00167A power module or its analogs using ICE3B0365J (Standby), ICE1PCS02 (PFC) microcircuits and power switches of the type FQA13N50CF, FSDM0565REWDTU.
MainBoard - the main board (motherboard) is a BN94-01311G module, using SGTV5810C, SII9185CTU, AT24C256BN, AP358 and other chips.
The tuner TCLW3001PD32S (H) provides the reception of television programs and tuning to channels.
Information from an alternative source:
SAMSUNG LE40R82B Chassis GBP40SEN / SAMSUNG LE40R81B
Panel Type (Matrix): LTA400WT-L06 LTA400WT-L09
Motherboard: BN94-01311G, SGTV5810C, SII9185CTU, AT24C256BN, Tuner: TCLW3001PD32S (H),
T-con: 4046HDCM4LV0.2
Invertor: SSB400WA16V REV 0.1, Dimming: BN41-00863A, AP358
PSU: BN44-00167, ICE3B0365J, ICE1PCS02
Remote control: BN59-00602A PSU circuit,
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTA400WT-L06
Type: a-Si TFT-LCD, Panel
Diagonal size: 40 inch
Resolution: 1366x768, WXGA
Display Mode: S-PVA, Normally Black, Transmissive
Active Area: 885.168x497.664 mm
Surface: Antiglare (Haze 40%), Hard coating (3H)
Brightness: 600 cd / m²
Contrast Ratio: 2000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 10/6 (Tr / Td); 8 (G to G)
Frequency: 60Hz
Lamp Type: 16 pcs CCFL Embedded (Balance board)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V