Technical description and composition of the SAMSUNG LE32R82B TV, panel type and applicable modules. The composition of the modules.SAMSUNG
Model: LE32R82B LE32R82BS
Chassis / Version: GBP32SEN
Panel: V315B1-L01
Lamp backlight: 16 Lamp CCFL
T-CON: V315B1-C01
Inverter (backlight): I315B1-16A
PWM Inverter: OZ964GN
MOSFET Inverter: AO4614
Trans Inverter: 4013L = 4018L
Power Supply (PSU): BN44-00155A MK32
PWM Power: TDA4863G, MC33067P, STR-A6159
MOSFET Power: STP20NM60, FQPF9N50C
MainBoard: BN41-00839D BN94-01311F
IC MainBoard: SPI Flash: S29AL016M90TFI01, Eeprom: 24C256
Tuner: BN40-00078A
Specifications LE32R82B
SAMSUNG LE32R82B
General repair guidelines for TV LCD
Possible malfunctions
- SAMSUNG LE32R82B does not turn on and does not show any signs of performance at all. Does not blink indicators and does not respond to control buttons.
Most likely in this case, the main switching power supply (MPS) BN44-00155A is faulty. It is necessary to measure its output voltages and, if they are absent, check the power switches (STP20NM60, FQPF9N50C) and rectifier diodes for the probability of short circuit in the converters.
In case of breakdowns in the secondary circuits, the converter, as a rule, can emergency work in the short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse usually breaks.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can put it out of operation in key mode or provoke an excess of the maximum current or voltage. These can be circuits supplying the PWM controller, damping or frequency-setting circuits, or elements of OOS (negative feedback) in the stabilization circuit. PWM controllers (PWM) TDA4863G, MC33067P, STR-A6159, in the absence of external damage and short circuit between the terminals, are checked by replacing with obviously good ones.
- There is no image, but there is sound and reaction to commands from the remote control. Or the image appears immediately after turning on and disappears.
These manifestations can be triggered by a power supply module, or by inverter defects, as well as distortion of the currents in the lamps due to their uneven wear. After checking all the electrolytic capacitors of the filters that are involved in the power supply of the inverter, it is necessary to ring in its converter the power switches for breakdown and the secondary windings of the transformers for an open.
Sometimes, for diagnostic purposes, it is necessary to disable the inverter protection. In such cases, special care must be taken during work, and the protection circuits should be restored immediately after the repair is completed.
- The TV does not turn on, does not respond to the remote control. The indicator blinks or signals standby mode.
Repair or diagnostics of the BN41-00839D motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, you should update or replace the software (software). Often, the MB (SSB) card must be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - SPI Flash: S29AL016M90TFI01, Eeprom: 24C256 and replace failed chips with new ones. Some malfunctions may be due to the use of BGA soldering technologies in modern Main Board. Typically, such defects are detected by local heating of the chip.
If there is no reception of television channels, but the TV is working properly from external devices, first of all you need to check the voltage of the tuner BN40-00078A and update the software. The pulses from the I2C bus must be controlled with an oscilloscope.
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Trust the repair to professionals with sufficient experience in the repair of electronic equipment.
Service manual SAMSUNG LE32R82B Chassis GBP32SEN
FOR MODELS LE23R81BX, LE26R81BX, LE26R82BX, LE23R86BD, LE26R86BD, LE32R86BD, LE32R82BX, LE37R86BD, LE37R81BX, LE40R86BD, LE40R81BX.
PSU SCHEMATIC ---> Samsung BN44-00155A Power supply.
MODEL: LE32R82BX:
Panel: LTA320WT-L08, T-CON 320WTC2LV4.8, Inverter: SSI320A12 INV32S12S, transformers: LT-32VE
The appearance of the MainBoard BN41-00839D is shown in the figure below:BN41-00839D
The appearance of the power supply
Main features of the SAMSUNG LE32R82B device:
Installed matrix (LCD panel) V315B1-L01.
The matrix control uses the Timing Controller (T-CON) V315B1-C01.
To power the backlight, an inverter I315B1-16A is used, it is controlled by the PWM controller OZ964GN. A transformer 4013L = 4018L is installed in the inverter converter. As power elements of the inverter, keys of the type AO4614 are used.
The necessary supply voltages for all nodes of the SAMSUNG LE32R82B TV are generated by the BN44-00155A power module or its analogs using TDA4863G, MC33067P, STR-A6159 microchips and power switches of the STP20NM60, FQPF9N50C type.
MainBoard - the main board (motherboard) is a BN41-00839D module, using SPI Flash chips: S29AL016M90TFI01, Eeprom: 24C256 and others.
The tuner BN40-00078A provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: CMO
Model: V315B1-L01
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: Super MVA, Normally Black, Transmissive
Active Area: 697.685x392.256 mm
Surface: Antiglare (Haze 25%), Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 1500: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 6.5 (G to G)
Frequency: 60Hz
Lamp Type: 16 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V