Technical description and composition of the SAMSUNG LE32A456C2C TV, panel type and applicable modules. The composition of the modules.SAMSUNG
Model: LE32A456C2C
Chassis / Version: GCR32SE
Panel: T315XW02 VL
T-CON: T315XW02 VL 31T03-C00
Inverter (backlight): SSI320A12 REV0.7
PWM Inverter: OZ9966SN
MOSFET Inverter: AOD486A
Trans Inverter: LT-32VE
Power Supply (PSU): BN44-00214A
PWM Power: MC33067P, STR-A6159, TDA4863G (PFC)
MOSFET Power: 10N60 (PFC)
MainBoard: BN41-00981B
IC MainBoard: CPU: SEMS01, SPI FLASH: MX25L1605AM2I (SOP8), EEPROM: AT24C256B (SO8), DTV: D61211GM, NAND: S29AL032D70TF103 (TSOP48), EEPROM: S24CS08 (SO8)
Tuner: BN40-00124A
Specifications LE32A456
SAMSUNG LE32A456C2C
General repair guidelines for TV LCD
Repair SAMSUNG LE32A456C2C must begin with the diagnosis of the malfunction and a thorough examination of its external and internal elements, including the case. In some cases, visible external damage to the elements can suggest directions for troubleshooting and localizing the defect before starting the necessary measurements at the control points of the nodes of electronic circuits. 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 solders will help the master to guess the causes and possible consequences of the malfunction.
If the SAMSUNG LE32A456C2C does not turn on, no control lights on the front panel light up or blink, therefore, there is a very high probability of a malfunction of the BN4400214A power module. In this case, the diagnosis and repair of the common power supply should always be started by checking the mains fuse. When it is broken, it is advisable to check for a breakdown, first of all, all power semiconductor elements of the converter and the rectifier diode bridge of the network, as well as the large electrolytic capacitor of the filter of the network rectifier and the key transistor.
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 for no reason, which should be sought by checking other elements of the primary circuit - electrolytic capacitors, a PWM controller that can only be checked by replacement, as well as others semiconductor elements (diodes, transistors, zener diodes).
It is somewhat more difficult to look for a malfunction in the converter of the power module with an active KKM (power factor corrector).
If the SAMSUNG LE32A456C2C does not have an image, but there is sound and the TV is controlled from 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 SSI320A12 REV0.7 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 in such cases there is a risk of failure of the power elements of the inverter and to take special care. After carrying out repairs, the protection circuit must be restored for further safe operation of the TV.
On the motherboard BN41-00981B, in the event of a malfunction, you should first check the performance of all the power stabilizers of the microcircuits and, if necessary, update the software (software).
Once again, remind users! Attempts to repair the TV SAMSUNG LE32A456C2C on its own without the appropriate qualifications and experience can lead to its complete non-repairability!
The appearance of the MainBoard BN41-00981B is shown in the figure below:BN41-00981B
PSU AdvancedThe power module BN44-00214A is made using a power factor correction circuit (PFC - Power Factor Correction) in order to eliminate multiple AC harmonics introduced by the device into the mains. The PFC assembly is a Step-Up Converter based on a FAN7530 PWM controller that evenly distributes high-frequency impulses of the charging current of the electrolytic capacitor of the rectifier filter of the mains voltage over a period of 50 Hz. The current of its charge in this case will already be determined not by its reactance (usually 10-30 ohms for the network frequency), but by the elements of the converter. As a result, a change in the amplitude of the pulses (envelope) of the consumed current of the converter will repeat the shape and phase of the input sinusoidal voltage. The availability of the increased voltage (about + 380V) in the operating mode on the capacitor of the line filter indicates the serviceability of the PFC node.
The appearance of the power supply
Main features of the SAMSUNG LE32A456C2C device:
Installed matrix (LCD panel) T315XW02 VL.
The matrix control uses the Timing Controller (T-CON) T315XW02.
To power the backlight, an SSI320A12 inverter is used, it is controlled by the OZ9966SN PWM controller. A transformer LT-32VE is installed in the inverter converter. As power elements of the inverter, keys of the AOD486A type are used.
The necessary supply voltages for all nodes of the SAMSUNG LE32A456C2C TV are generated by the BN44-00214A power module or its analogs using MC33067P, STR-A6159, TDA4863G (PFC) microcircuits and 10N60 (PFC) type power switches.
MainBoard - the main board (motherboard) is a BN41-00981B module using CPU chips: SEMS01, SPI FLASH: MX25L1605AM2I (SOP8), EEPROM: AT24C256B (SO8), DTV: D61211GM, NAND: S29AL032D70TF103 (TSOP48) S24CS08 (SO8) and others.
The tuner BN40-00124A provides the reception of television programs and tuning to channels.
Information from an alternative source:
SAMSUNG LE32A456C2C chassis GCR32SE
Motherboard: BN41-00981B,
T-con: T315XW02 VL
Invertor: SSI320A12 REV0.7
PSU: BN4400214A
Additional technical information about the panel:
Brand: AUO
Model: T315XW02 VL
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: AMVA, Normally Black, Transmissive
Active Area: 697.68x392.26 mm
Surface: Antiglare (Haze 11%), Hard coating (3H)
Brightness: 450 cd / m²
Contrast Ratio: 2500: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 6.5 (G to G)
Frequency: 60Hz
Lamp Type: CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
