Technical description and composition of the SAMSUNG LE22B350F2W TV, panel type and applicable modules. The composition of the modules.SAMSUNG
Model: LE22B350F2W
Chassis / Version: N65D
Panel: T216HA01-DB
Inverter (backlight): integrated into PSU
PWM Inverter: SEM2105
Power Supply (PSU): BN44-00302A IP-55145T
PWM Power: Q0765R
MainBoard: BN41-01228C BN94-03159K
IC MainBoard: MX25L6405DMI-12G, AT24C1024B
Tuner: BN40-00150A
Control: BN59-00865A
Specifications LE22B350
SAMSUNG LE22B350F2W
General repair guidelines for TV LCD
Possible malfunctions
- SAMSUNG LE22B350F2W does not turn on. There are no signs of operability. The indicators on the front panel do not light or flash, the TV does not respond to the remote control and control buttons.
In most such cases, the main switching power supply BN44-00302A is found to be faulty. In the general case, it is necessary to verify the presence of output voltages and, if they are absent, to check the power switches and rectifier diodes for a probable short circuit.
In the event of a breakdown in the secondary circuits of the converter, it can usually fail in short circuit mode, and in the event of a short circuit in the power elements of the primary circuit, the main fuse or current sensor at the source of the key most often breaks.
The key built into the Q0765R PWM controller sometimes fails 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. It can be supply, damper circuits, or elements of OOS (negative feedback) stabilization.
The PWM controller itself (PWM) is usually checked by replacing the Q0765R with a known-good one.
- 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 TV does not enter the operating mode, does not respond to the remote control. The indicator on the front panel lights up constantly or blinks.
Repair or diagnostics of the BN41-01228C 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 MX25L6405DMI-12G, AT24C1024B microchips are replaced with the necessary equipment and the corresponding components. Faults associated with the application of BGA processor soldering technologies can be localized by the heating method.
In the absence of tuning to the channels of on-air or cable television, you should make sure that the software is correct, as well as in accordance with the ratings of the supply voltage at the terminals of the tuner BN40-00150A. It is also necessary to check the presence of pulses of data exchange between the tuner and the processor via the I2C bus using an oscilloscope.
It should be remembered! Attempts to self-repair a SAMSUNG LE22B350F2W TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!
The appearance of the MainBoard BN41-01228C is shown in the figure below:BN41-01228C
BN41-01228C can be used in TVs:
SAMSUNG LE22B450C8WXRU (Panel T216HA01-DB (DD01)), SAMSUNG LE22B350F2W (Panel T216HA01-DB).
The appearance of the power supply
Main features of the SAMSUNG LE22B350F2W device:
Installed matrix (LCD panel) T216HA01-DB.
To power the backlight, a converter is used, combined with the power supply, controlled by the SEM2105 PWM controller.
The formation of the necessary supply voltages for all nodes of the SAMSUNG LE22B350F2W TV is carried out by the BN44-00302A power module, or its analogs using Q0765R microcircuits.
MainBoard - the main board (motherboard) is a BN41-01228C module, using the MX25L6405DMI-12G, AT24C1024B and other chips.
The tuner BN40-00150A provides the reception of television programs and tuning to channels.