Technical description and composition of the SAMSUNG LE22C450E1W TV, panel type and applicable modules. The composition of the modules.SAMSUNG
Model: LE22C450E1W
Chassis / Version: N82C
Panel: H216WA0114Z
Inverter (backlight): integrated into PSU
Power Supply (PSU): BN44-00370A
PWM Power: FSQ0765R
MainBoard: BN41-01538A BN94-02707Y P003
IC MainBoard: DRV604, NAND: KFG1G16U2D, EEprom: ATMLH034-2ECL (24C256)
Tuner: BN40-00202A R10416, ALP514SF
Specifications LE22C450
SAMSUNG LE22C450E1W
General repair guidelines for TV LCD
Repair of the SAMSUNG LE22C450E1W TV is advisable to start with a careful external examination of all its constituent elements, both internal and external. Inspection is also subject to body elements, control buttons, screen, connectors and cords. 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. Experienced repairmen are often aware of the causes of the defect and the possible consequences, for example, from ring cracks in the soldering of the leads of the elements, as well as from swollen capacitors or resistors burnt to coal dust and other external indirect signs.
If the power module BN44-00370A malfunctions, the external manifestations may be different, for example, SAMSUNG LE22C450E1W does not turn on at all and there is no indication of the indicator lights on the front panel. When repairing the power supply, it is advisable to start the diagnostics by checking the mains fuse and, in the event of a break, the cause should be sought in the power semiconductor elements of the pulsed flyback converter of the main PSU. First of all, it is necessary to check the diodes of the bridge of the rectifier of the mains voltage and the power switch of the converter, which can be installed separately on the radiator, or integrated with a PWM controller.
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).
If an active Power Factor Corrector (CMC) is used in the power module circuitry, it can sometimes become more difficult to troubleshoot. Knowledge, experience, intuition and skills in such cases have a great advantage for a successful repair.
In the circuitry of the SAMSUNG LE22C450E1W TV, a single power supply and inverter are used, which are combined into one common module BN44-00370A. With such a circuit design of the module, there is no possibility of a separate replacement of the inverter, but when repairing at a component level, there are usually no significant difficulties in diagnosing and localizing a defect.
In cases where the SAMSUNG LE22C450E1W TV has lost an image, and the sound is there and all other functions are operational, there is a possibility of a malfunction of the inverter (converter for powering the backlight). When you turn on the TV, the image may appear briefly and immediately disappear. It should be borne in mind that with such manifestations, the lamps themselves also fail, the malfunction of which can be detected by replacement, by connecting to the connectors for diagnostics that are known to be serviceable and suitable in power.
Diagnostics of the BN44-00370A inverter can be difficult due to the operation of the protection, which is organized by the designers to prevent negative consequences or fires in emergency cases, for example, during short circuits or breaks in the lamp power supply circuit, as well as their possible depressurization. To make the necessary measurements at control points or to take the necessary waveforms, repairmen have to block the protection circuits in order to be able to diagnose.
All necessary precautions must be observed when disabling the inverter protection during diagnostics and not leaving it disconnected after the repair is completed.
Repair or diagnostics of the BN94-02707Y motherboard should be started by checking the power stabilizers. If necessary, update the software (software). When repairing an MB board, it is necessary to check its components DRV604, tuner BN40-00202A R10416, ALP514SF. Defective items should be replaced.
Remember! Attempts to self-repair by users of the SAMSUNG LE22C450E1W TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!
The appearance of the MainBoard BN41-01538A is shown in the figure below:BN41-01538A
BN41-01538A can be used in TVs:
SAMSUNG LE22C450E1W (Panel H216WA0114Z), SAMSUNG LE19C450E1W (Panel 19 inches).
Main features of the SAMSUNG LE22C450E1W device:
Installed matrix (LCD panel) H216WA0114Z.
To power the backlight, a converter is used, combined with the power supply.
The formation of the necessary supply voltages for all nodes of the SAMSUNG LE22C450E1W TV is carried out by the BN44-00370A power module, or its analogs using FSQ0765R microcircuits.
MainBoard - the main board (motherboard) is a BN41-01538A module, using chips DRV604, NAND: KFG1G16U2D, EEprom: ATMLH034-2ECL (24C256) and others.
Tuner BN40-00202A R10416, ALP514SF provides the reception of television programs and tuning to channels.