Technical description and composition of the SAMSUNG LE46S81B TV, panel type and applicable modules. The composition of the modules.SAMSUNG
Model: LE46S81B
Panel: LTA460WT-L15 0T1
Inverter (backlight): integrated into PSU
PWM Inverter: FAN7382 (8pin), LX1691A. (16pin)
MOSFET Inverter: FQPF9N50C
Trans Inverter: CT-27, BL-1040
Power Supply (PSU): BN44-00166B - IP-301135A
PWM Power: DM0365R (Standby DIP-8), ICE2BS01 (DIP-8 flyback), ICE1PCS02 (PFC)
MOSFET Power: FQPF6N80C, SD20N60 (PFC)
MainBoard: BN41-00878A
IC MainBoard: MT8293AE, SDP64, NTP3000
Tuner: HTM-6C / 235S BN40-00099A
SAMSUNG
Model: LE46S81B
Chassis / Version: JA46EO
Panel: LTA460WT-L15
T-CON: 4046HDCP2LV0.6
Inverter (backlight): integrated into PSU
PWM Inverter: FAN7382 (8pin), LX1691A. (16pin)
MOSFET Inverter: FQPF9N50C
Power Supply (PSU): BN44-00166B IP-46STD
PWM Power: DM0365R (Standby DIP-8), ICE2BS01 (DIP-8 flyback), ICE1PCS02 (PFC)
MOSFET Power: FQPF6N80C, SD20N60 (PFC)
MainBoard: BN41-00878A BN94-01453B
IC MainBoard: CPU: MT8293AE, Scaler: SDP64; SOUND: NTP-3000;
Tuner: BN40-00099A
Control: IR: BN41-00850A
Technical specifications LE46S81B
SAMSUNG LE46S81B
General repair guidelines for TV LCD
Repair of the SAMSUNG LE46S81B 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.
Sometimes the SAMSUNG LE46S81B TV simply does not turn on. No control lights on the front panel are lit or blinking, the TV does not respond to the remote control and does not make any sounds or any signs of life when turned on. The most likely cause of the malfunction is the failure of the general power module BN44-00166B .. IP-301135A. When diagnosing and repairing the power supply, first of all, it is necessary to check the fuse and, if it is broken, it is necessary to identify the cause. Often in such cases, an avalanche (thermal) breakdown is detected in the power semiconductor elements of the module - rectifier diodes or power key.
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.
If the power module uses an active KKM circuit (power factor control), troubleshooting is somewhat more complicated.
If the SAMSUNG LE46S81B does not have an image, there is sound and the channels are switched, there is a possibility of a malfunction of the backlight lamps or their power converter - inverter. Sometimes when you turn on the image appears and disappears immediately. In such cases, it is necessary to check the electrolytic capacitors of the power filter of the inverter itself, including in the secondary rectifier of the main power supply.
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 during depressurization of lamps. 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.
If the motherboard BN94-01453B 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. When repairing an MB board, you need to check its components MT8293AE, SDP64. Defective items should be replaced.
Remember! Attempts to self-repair by users of the SAMSUNG LE46S81B TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!
SCHEMATIC ---------> Samsung Chassis GJA26SEU-GJA46SEU.
FOR MODELS---------> Samsung LE26S81BX, LE26S86BD, LE32S81BX, LE32S86BD, LE37S81BX, LE40S81BX, LE40S86BD, LE46S81BX
SCHEMATIC ---------> Samsung Chassis GJA26TSA-GJA46TSA.
FOR MODELS---------> Samsung LE26S81BHX, LE32S81BHX, LE37S81BHX, LE40S81BHX, LE46S81BHX
BN41-00878A
BN41-00878A can be used in TVs:
SAMSUNG LE26R81BX LE26R81B LE26R81BS (Panel T260XW02 V.5), SAMSUNG LE26S81BS (Panel V260B1-L04 Rev. C1), SAMSUNG LE32S81B (Panel T315XW02), SAMSUNG LE32S81B (Panel V315B1-L01381, LT01301, LT01BC, Rev. SAMSUNG LE46S81B (Panel LTA460WT-L15 0T1), SAMSUNG LE46S81B (Panel LTA460WT-L15), SAMSUNG LE23R81W (Panel T230XW01 V.1), SAMSUNG LE26R82B (Panel T260XW02 V.5), SAMSUNG LE231XB01BW1B231BWBB81B23B81B23B81B23B81B23BX1B231
PSU Advanced
The LE46S81B TV is equipped with a BN44-00166 power module using the PFC (Power Factor Correction) scheme acting as an active filter to eliminate the higher harmonic components of the current consumption. The boost converter based on the ICE1PCS02 PWM controller does not allow the input rectifier filter's electrolytic capacitor to be connected to the network directly through open diodes when the charge current determines its reactance (about 15-30 ohms at a frequency of 50 Hz). As a result of the conversion, the charging current of the capacitor will be determined in such a way that the envelope of the high-frequency pulses of the input current will repeat the phase and shape of the sine wave of the input voltage. The health check of the PFC unit is carried out by measuring the DC voltage on the capacitor of the rectifier network. In operating mode, it should be around 380V, in standby approximately 300V.
The appearance of the power supply
Main features of the SAMSUNG LE46S81B device:
Installed matrix (LCD-panel) LTA460WT-L15.
The matrix control uses the Timing Controller (T-CON) 4046HDCP2LV0.6.
To power the backlight, a converter is used, combined with a power supply, controlled by a FAN7382 (8pin) PWM controller, LX1691A. (16pin). As power elements of the inverter, keys of the FQPF9N50C type are used.
The necessary supply voltages for all nodes of the SAMSUNG LE46S81B TV are generated by the BN44-00166B power module or its analogs using microchips DM0365R (Standby DIP-8), ICE2BS01 (DIP-8 flyback), ICE1PCS02 (PFC) and power switches of the type FQPF6N80C, SD20N60 (PFC).
MainBoard - the main board (motherboard) is a BN41-00878A module, using CPU chips: MT8293AE, Scaler: SDP64; SOUND: NTP-3000; and others.
The tuner BN40-00099A provides the reception of television programs and tuning to channels.
Information from an alternative source:
SAMSUNG LE46S81BX / BWT Chassis GJA46SEU
Panel Type (Matrix): LTA460WT-L15
Motherboard: BN94-01453B BN41-00878A, MT8293AE, Tuner: BN40-00099A
T-con: 4046HDCP2LV0.6, LMX4122TO, EM636165TS-6G
INVERTER: LEFT SSB460WA22L REV06 & SSB460WA22R REV06
PSU: BN44-00166B IP-301135A, ICE 1PCS02, FAN7382, DMO365R, ICE 2BS01, LX1691A
Remote control: BN59-00609A, Service menu
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTA460WT-L15
Type: a-Si TFT-LCD, Panel
Diagonal size: 46 inch
Resolution: 1366x768, WXGA
Display Mode: Normally Black, Transmissive
Active Area: 1018.35x572.544 mm
Display Colors:, CIE1931 72%
Frequency: 60Hz
Lamp Type: CCFL