Technical description and composition of the SAMSUNG LE32R51 TV, type of panel and applicable modules. The composition of the modules.SAMSUNG
Model: LE32R51 LE32R51BM S
Panel: LTA320W2-L14
T-CON: 320W2C4LV6.4
Inverter (backlight): KLS-320VE-J REV: 01
PWM Inverter: BD9884FV
MOSFET Inverter: SP8M3
Power Supply (PSU): BN41-00522A BN94-00622D
MainBoard: BN41-00545D
IC MainBoard: M30620SPGP, FST3125M, TPA3004D2, K4D263238E-GC36, 24C32, MST9883CR
Tuner: BN40-00051A
Control: IR: BN41-00554B and BN41-00555A
Specifications LE32R51B
SAMSUNG LE32R51
General repair guidelines for TV LCD
Any repair of electronic equipment begins with a careful external inspection of the device and troubleshooting. In this case, you should carefully examine all the elements of the SAMSUNG LE32R51 TV, both internal and external. Sometimes, for some visible changes, you can determine the further direction of the defect search and localization of the malfunction before the start of taking the oscillograms and making the necessary measurements at the control points. Elements with visible damage, for example, capacitors swelled up after boiling the electrolyte, charred resistors in certain nodes of the circuit, as well as ring cracks in soldering will help the master to guess the causes and possible consequences of the malfunction.
Sometimes the SAMSUNG LE32R51 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 a failure of the common power module BN94-00622D (BN41-00522A). 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 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 reason 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.
If an active Power Factor Corrector (CMC) is used in the power module circuitry, it can sometimes become more difficult to troubleshoot. Knowledge, experience, intuition and skills in such cases have a great advantage for a successful repair.
If the SAMSUNG LE32R51 does not have an image, but there is sound and the TV is controlled by the remote control, a malfunction in the display backlight nodes is likely. Lamps or power converter - inverter may be faulty. Often in such cases, when you turn on the TV, an image appears and immediately disappears. First of all, it is necessary to verify the operability of the electrolytic capacitors of the rectifier filter supplying the inverter, and check the LCD lamps by connecting external and obviously serviceable for diagnosis to the connectors.
When repairing the KLS-320VE-J REV: 01 inverter, it is often necessary to disable the protection for diagnostics, which, for the purpose of fire safety, turns it off in any emergency situation, for example, during a malfunction or uneven wear of the lamps, which makes it difficult to find a defect.
It should be remembered that when the protection is turned off, there is always a risk of failure of the inverter power elements during diagnosis. After repair, it is imperative to restore all standard converter protection circuits.
Repair of the BN41-00545D motherboard must begin with the diagnosis and verification of all linear stabilizers or power converters of its microcircuits. Sometimes it may be necessary to update the software (software) - flashing FLASH or EEPROM.
Owners and users of the SAMSUNG LE32R51 TV 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!
SCHEMATICS ----> Samsung LE23R51B, LE26R51B, LE32R51B, LE40R51B Chassis RE23EO, RE26EO, RE32EO, RE40EO.
LE32R51BM S CHASSIS SP03:
Panel LTA320W2-L14; Main BN94-00695H BN41-00661A; T-con 320W2C4LV6.4; PSU BN96-02583a; Inverter KLS-S320BCI-V Rev-01.
The appearance of the MainBoard BN41-00545D is shown in the figure below:
BN41-00545D
BN41-00545D can be used in TVs:
SAMSUNG LE32R51 LE32R51BM S (Panel LTA320W2-L14), SAMSUNG LE32R51B (Panel LTA320W2-L01), SAMSUNG LE26R51B LE26R51BM (Panel LTA260W2-L11), SAMSUNG LE40R51B LE40R51BX (SAMSUNG LE40 LB2011BG01LB201LB201LB2301 Panel LTA2G01 LE37R41B (Panel 1366x768 720p HD (LQ370T3LZ41 / LQ370T3LZ44)).
The appearance of the power supply
Main features of the SAMSUNG LE32R51 device:
Installed matrix (LCD panel) LTA320W2-L14.
The matrix control uses the Timing Controller (T-CON) 320W2C4LV6.4.
To power the backlight, an inverter KLS-320VE-J is used, it is controlled by the BD9884FV PWM controller. As power elements of the inverter, keys of the type SP8M3 are used.
The formation of the necessary supply voltages for all nodes of the SAMSUNG LE32R51 TV is carried out by the power module BN41-00522A, or its analogues.
MainBoard - the main board (motherboard) is a BN41-00545D module, using microcircuits M30620SPGP, FST3125M, TPA3004D2, K4D263238E-GC36, 24C32, MST9883CR and others.
The tuner BN40-00051A provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTA320W2-L14
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: S-PVA, Normally Black, Transmissive
Active Area: 697.68x392.26 mm
Surface: Antiglare (Haze 44%), Hard coating (3H)
Brightness: 450 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 8/6 (Tr / Td); 8 (G to G)
Frequency: 60Hz
Lamp Type: 16 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V