Technical description and composition of the SAMSUNG LE32A436T1D TV, panel type and applicable modules. The composition of the modules.SAMSUNG
Model: LE32A436T1D
Panel: V315B1-L01
Inverter (backlight): I315B1-16A
PWM Inverter: OZ964GN, BA2902F
MOSFET Inverter: AO4614
Trans Inverter: 4018L 0819A2
Power Supply (PSU): BN44-00192B
PWM Power: FAN7530 (PFC), MC33067P (PWM 16 pin), FSQ0165RN (Standby)
MOSFET Power: 11N60, FQPF9N50CF
MainBoard: BN41-00980C BN94-02236C
IC MainBoard: MX25L1605AM21, 24C256
Tuner: BN40-00120A
Appearance
SAMSUNG LE32A436T1D
General repair guidelines for TV LCD
Possible malfunctions
- The SAMSUNG LE32A436T1D TV does not turn on, does not respond to the remote control and the control panel buttons, does not light up or blink indicators.
Often in such cases, the BN44-00192B power module is faulty. It is necessary to measure its output voltages, and in case of their absence, check the serviceability of power switches (11N60, FQPF9N50CF) of converters and rectifier diodes for a short circuit probability.
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.
The breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in the circuits supplying the PWM controller, frequency-setting or damper ones, as well as in the circuits of Negative Feedback (OOS) stabilization. PWM controllers (PWM) FAN7530 (PFC), MC33067P (PWM 16 pin), FSQ0165RN (Standby), if they do not have visible damage to the case and open fault between the terminals, are usually checked by replacement.
- There is no image, there is sound, there is a reaction to the remote control. Or immediately after turning on for a second, the image may appear and immediately disappear.
These manifestations can be triggered by a power supply module, or by inverter defects, as well as a 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 powering the inverter, you should ring in its converter power keys for breakdown and the secondary windings of transformers for an open.
If in diagnosing a malfunction, it is necessary to disable the inverter protection, there is a risk of failure of the power elements of the inverter, and special care is required during operations, and after their completion, it is necessary to restore the protection circuits for further safe operation of the TV by the owner in normal mode.
- The indicator blinks or glows constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the BN41-00980C 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). The board is repaired and the MX25L1605AM21, 24C256 microchips are replaced with the necessary equipment and the corresponding element base. Faults associated with the application of BGA processor soldering technologies can be localized by the heating method.
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 BN40-00120A 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.
The appearance of the MainBoard BN41-00980C is shown in the figure below:BN41-00980C
The appearance of the power supply
Main features of the SAMSUNG LE32A436T1D device:
Installed matrix (LCD panel) V315B1-L01.
To power the backlight, an inverter I315B1-16A is used, it is controlled by the PWM controller OZ964GN, BA2902F. The transformer 4018L 0819A2 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 LE32A436T1D TV are generated by the BN44-00192B power module or its analogs using FAN7530 (PFC), MC33067P (PWM 16 pin), FSQ0165RN (Standby) microcircuits and 11N60, FQPF9N50CF type power switches.MainBoard - the main board (motherboard) is a BN41-00980C module, using microchips MX25L1605AM21, 24C256 and others.
The tuner BN40-00120A 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
