Technical description and composition of the SAMSUNG LE37R82BX TV, panel type and applicable modules. The composition of the modules.SAMSUNG
Model: LE37R82BX LE37R82B
Chassis / Version: AM01
Panel: T370XW02 V6
Inverter (backlight): V144-U03
Trans Inverter: 6026B776C08 GP-04 (6024B704009 GP-03 6020B72S008 GP-02)
Power Supply (PSU): BN44-00216A PSLF231501
PWM Power: MC33067P (PWM), FAN7530 (PFC), FSQ0365RN
MOSFET Power: 17N60 (PFC), 9N50 (PWM)
MainBoard: BN41-00839E BN94-01325P
IC MainBoard: Cpu: SVP UX68 7568U-LF, Flash: S29LV016D - (T-BDPPEUMD-2005), Eeprom - 24C256, MAX232EC, Audio Processor: SGTV5810C * Audio: NTP-3000, Submicom: WT61P4 (TT-BDPMPEUS-1004)
Tuner: BN40-00116A HTM2-6L2 / 235S
Specifications of LE37R82B
SAMSUNG LE37R82BX
General repair guidelines for TV LCD
It is advisable to start any repair and diagnostics of the SAMSUNG LE37R82BX TV with a careful external examination of internal and external elements, including case parts, a display, buttons and cables. Many changes visible to the naked eye make it possible to determine the future direction of troubleshooting and localization of the defect. Electrolytic capacitors of filters with a swollen casing, as well as ring cracks or a layer of coal formed on the resistors of heating elements, sometimes give the repairman the reasons for the malfunction and possible consequences.
In the absence of any signs of operability, when the SAMSUNG LE37R82BX does not turn on and does not signal anything with the control lights on the panel, the PSLF231501 power supply module is most likely faulty. When diagnosing and repairing the PSLF231501 power supply, first of all, it is necessary to check the fuse, and if it is broken, the power switch and rectifier bridge diodes should be checked for avalanche (thermal) breakdown.
Power switches in flyback converters fail extremely rarely for no reason and, when they are broken, it is necessary to look for a malfunction in the stabilization circuits by checking electrolytic capacitors, semiconductor devices, and resistors in the primary circuit. The reason may be a malfunction of the PWM controller chip, which can only be checked by replacing it with a new or obviously working one.
When using the Active Power Factor Correction (CMC) circuitry in the power module, the search for faulty elements is somewhat more complicated.
Sometimes the SAMSUNG LE37R82BX TV does not have an image, but there is sound, or the image appears and immediately disappears. In this case, there is a high probability of a malfunction of the converter of the backlight lamps, or of the lamps themselves, which can be checked by replacement. In such cases, it is necessary to verify the serviceability of all electrolytic capacitors of the filter according to the power supply of the inverter itself, including the power supply unit (power supply unit).
Repair of the V144-U03 inverter is complicated by the fact that in case of any malfunction or emergency situation, even if the lamps are unevenly worn, a protection is triggered, which turns it off for fire safety purposes. Diagnostics become impossible and protection needs to be disabled.
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 some cases, to repair the MB board (SSB), it may be necessary to replace the chips with new or obviously good ones.
Owners of LE37R82BX TVs are recommended for repair only to qualified specialists with experience! Self-repair attempts without the appropriate knowledge and skills can lead to serious negative consequences!
SCHEMATICS OF PSU ----> BN44-00216A.
The appearance of the MainBoard BN41-00839E is shown in the figure below:BN41-00839E
BN41-00839E can be used in TVs:
SAMSUNG LE32R81B LE32R81W (Panel LTF320AB01), SAMSUNG LE32R81BX (Panel V315B1-L01 Rev. C3), SAMSUNG LE37R82BX LE37R82B (Panel T370XW02 V6), SAMSUNG LE40R82BX (Panel LTA400WTLT. 081, LT40BTWT-L07 081, LT40BTL07
PSU Advanced
According to the conditions of compliance with modern world standards for household switching power supplies, the BN44-00216A module provides for the use of a Power Factor Correction unit. The PFC circuit is a flyback converter based on the FAN7530 PWM controller. The reactance of an electrolytic capacitor of a line filter at a frequency of 50-60 Hz is usually not more than 20-30 ohms and its charge directly from the network through open diodes could reach tens of amperes per pulse if no filtering were applied.
As a result of the PFC conversion, an increased voltage on the capacitor (about 380V) cannot directly open the rectifier diodes, on the anode of which the voltage will always be slightly less (about 300V) and then its charging current will always be limited by the elements of the PWM controller. As a result, the envelope of the high-frequency pulses of the consumed current will repeat the shape and phase of the input sinusoidal voltage. The presence of an increased voltage (+ 380V) on the mains capacitor indicates the serviceability of the PFC node.
The appearance of the power supply
Main features of the SAMSUNG LE37R82BX device:
Installed matrix (LCD-panel) T370XW02 V6.
To power the backlight used inverter V144-U03. A transformer 6026B776C08 GP-04 (6024B704009 GP-03 6020B72S008 GP-02) is installed in the inverter converter.
The necessary supply voltages for all nodes of the SAMSUNG LE37R82BX TV are generated by the BN44-00216A power supply module or its analogs using microcircuits MC33067P (PWM), FAN7530 (PFC), FSQ0365RN and power switches of the type 17N60 (PFC), 9N50 (PWM).
MainBoard - the main board (motherboard) is a BN41-00839E module, using Cpu chips: SVP UX68 7568U-LF, Flash: S29LV016D - (T-BDPPEUMD-2005), Eeprom - 24C256, MAX232EC, Audio Processor: SGTV5810C * Audio : NTP-3000, Submicom: WT61P4 (TT-BDPMPEUS-1004) and others.
The tuner BN40-00116A HTM2-6L2 / 235S provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: AUO
Model: T370XW02 V6
Type: a-Si TFT-LCD, Panel
Diagonal size: 37 inch
Resolution: 1366x768, WXGA
Display Mode: AMVA, Normally Black, Transmissive
Active Area: 819.6x460.8 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 550 cd / m²
Contrast Ratio: 1500: 1
Display Colors: 16.7M (8-bit)
Response Time: 15/5 (Tr / Td); 8 (G to G)
Frequency: 60Hz
Lamp Type: CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V