Technical description and composition of the SAMSUNG LE27T51B TV, panel type and applicable modules. The composition of the modules.
SAMSUNG
Model: LE27T51B
Chassis / Version: GTR27KE
Panel: V270B1-L01 rev c1
T-CON: V270B1-L01-C
Inverter (backlight): V070 4H.V0708 E5 analogue inverter 30PF9946 / 12 LC4.6
PWM Inverter: OZ960GN LM393 LM 339
MOSFET Inverter: FDS 8958A (8)
Power Supply (PSU): PSLF181501A BN96-02581A
MainBoard: BN41-00636C BN94-00752A
IC MainBoard: Cpu: FLI5921H-LF, Spi Flash: 25L4005M2C, Eeprom: 24C32WP
Tuner: BN40-00072A TECH0949PG46A (S)
Technical Specifications LE27T51B
SAMSUNG LE27T51B
General repair guidelines for TV LCD
Repair SAMSUNG LE27T51BC must begin with the diagnosis of the malfunction and a thorough inspection of its external and internal elements, including the case. Many changes visible to the naked eye make it possible to determine the future direction of troubleshooting and localization of 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 soldering of the terminals of transformers or heating elements of the circuit are also frequent sources of many malfunctions with a variety of external manifestations.
If the power supply module BN96-0258 1A malfunctions, the external manifestations may be different, for example, SAMSUNG LE27T51BC does not turn on at all and there is no indication of the indicator lights on the front panel. If the mains fuse is broken in the power supply, in most cases a breakdown of the power switch 11N60C3 is detected, which can be integrated with a 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.
If a breakdown of the power switch of the flyback converter of the power supply unit is detected, it should be remembered that it does not fail without any reasons that should be sought by checking other elements of the primary circuit - electrolytic capacitors, PWM controller VIPer12A, TDA4863G, YG972S6, F9222L, KIA278, MC33167T , which can be checked only by replacement, as well as other semiconductor elements (diodes, transistors, zener diodes).
In cases using a power module with an active KKM, troubleshooting is sometimes somewhat more complicated.
If, when you turn on the TV, the image appears and immediately disappears, or is initially absent when turned on, but there are 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 feeding the inverter should be checked.
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 when the lamps are depressurized. This protection makes it difficult to diagnose and repair the inverter.
In such cases, the risk of failure of the power elements of the inverter is most likely, and special care is required during work, and after their completion, it is necessary to restore the protection circuit for further safe operation of the TV by the owner in normal mode.
Diagnosis and repair of the motherboard BN94-00752A PB, BN41-00636C is carried out by checking the performance of power stabilizers or updating the software (software). In cases of attempts to repair the MB (SSB) board, it is necessary to check the health of its elements - FLI5921H-LF, 24C32WP, 24C16AN, 25L4005M2C, EM636165TS-6G, which may require replacement with new ones.
Remember! Attempts to self-repair by users of the SAMSUNG LE27T51BC TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!
The appearance of the MainBoard BN41-00636C is shown in the figure below:BN41-00636C
BN41-00636C can be used in TVs:
SAMSUNG LE27T51B (Panel V270B1-L01 rev c1), SAMSUNG LE27T51BC (Panel V270B1-L01), SAMSUNG LE27T51BX LE27T51BWT (Panel V270B1-L01 Rev c1).
The appearance of the power supply
Main features of the SAMSUNG LE27T51B device:
Installed matrix (LCD panel) V270B1-L01 rev c1.
The matrix control uses the Timing Controller (T-CON) V270B1-L01-C.
The V070 inverter is used to power the backlight, it is controlled by the OZ960GN LM393 LM 339. PWM controller. FDS 8958A keys (8) are used as power elements of the inverter.
The formation of the necessary supply voltages for all nodes of the SAMSUNG LE27T51B TV is carried out by the PSLF181501A power module, or its analogues.
MainBoard - the main board (motherboard) is a BN41-00636C module, using Cpu chips: FLI5921H-LF, Spi Flash: 25L4005M2C, Eeprom: 24C32WP and others.
Tuner BN40-00072A TECH0949PG46A (S) provides the reception of television programs and tuning to channels.
Information from an alternative source:
SAMSUNG LE27T51BC Chassis GTR27KE
Panel Type (Matrix): V270B1-L01,
Motherboard: BN94-00752A PB, BN41-00636C, FLI5921H-LF, 24C32WP, 24C16AN, 25L4005M2C, EM636165TS-6G x2
T-con: V270B1-L01-C, CM2678A-KQ, 24C128I, P2V16S406TP x2, LM324AM x4
Invertor: DARFON V070, OZ960GN, FDS8958A x8, LM399 x2, LM339, trafo 4006A x7,
PSU: BN96-0258 1A, VIPer12A, TDA4863G, 11N60C3, YG972S6, F9222L, KIA278, MC33167T, MBRFI545CT
Additional technical information about the panel:
Brand: CMO
Model: V270B1-L01
Type: a-Si TFT-LCD, Panel
Diagonal size: 27.0 inch
Resolution: 1366x768, WXGA
Display Mode: Super MVA, Normally Black, Transmissive
Active Area: 596.259x335.232 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 550 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (8-bit), CIE1931 75%
Response Time: 8 (G to G)
Frequency: 60Hz
Lamp Type: 14 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V
