Technical description and composition of the SAMSUNG LE22B450C8WXRU TV, panel type and applicable modules. The composition of the modules.SAMSUNG
Model: LE22B450C8WXRU
Panel: T216HA01-DB (DD01)
Inverter (backlight): integrated in PSU
PWM Inverter: SEM2105 (16)
MOSFET Inverter: 4506GER (5)
Trans Inverter: TM-09208
Power Supply (PSU): BN44-00302A - IP-55145T
PWM Power: Q0765R
MainBoard: BN41-01228C BN94-02589K
IC MainBoard: TA55709, DRV603, 24C08, DC-DC Y4742 (16), AO4801 (8)
Tuner: DTX-8B / W12B5S BN40-00150A
Specifications LE22B450
SAMSUNG LE22B450C8WXRU
General repair guidelines for TV LCD
SAMSUNG LE22B450C8W TV, like any other, it is advisable to start repairing with an inspection of internal and external elements. Often, according to the external signs and the nature of some damage, it is possible to draw preliminary conclusions and determine a further algorithm for troubleshooting and localizing the malfunction before making the necessary measurements and taking oscillograms at control points. Ring cracks in the soldering of the leads of the elements, deformed electrolytic capacitors, charred resistors - all this for the repairman can be a hint in assumptions about the causes and consequences of the malfunction.
Sometimes the SAMSUNG LE22B450C8WX (RU) TV simply does not turn on. No control lights on the front panel are lit or blinking, the TV does not respond to the remote control and does not make any sounds or any signs of life when turned on. The most likely cause of the malfunction is the failure of the BN44-00302A common power module. It is advisable to start the troubleshooting of the power supply module by checking the mains fuse. If it is torn, it is necessary to check first of all the power semiconductor elements - rectifier diodes and the power switch of the converter, which are often found in breakdown conditions in such situations.
As a rule, the keys of flyback converters, which use an N-Fet field effect transistor on a separate radiator, or integrated with a Q0765R PWM controller in a single chip, are reliable enough and rarely fail for no reason. The reasons for the breakdown of the key should be sought by checking other components of the circuit - electrolytic capacitors, resistors and semiconductor elements of the primary circuit. The PWM chip is checked by replacing it with a known good one.
If the power module uses an active KKM circuit (power factor control), troubleshooting is somewhat more complicated.
SAMSUNG LE22B450C8W TV power supply module BN44-00302A is combined with an inverter - converter, which is used to power the display fluorescent lamps. When repairing by replacing components, this circuitry option does not complicate the search for defects and is popular in the latest TV models from many manufacturers.
If, when you turn on the TV, the image appears and immediately disappears, or is initially absent when turned on, but there are sound and other functions work, there is a high probability of a malfunction of the inverter (power converter for the backlight). In such cases, the lamps, the inverter and the common power module are subject to verification, in which the electrolytic capacitors of the rectifier filter feeding the inverter should be checked.
Diagnostics and repair of the inverter are often complicated by the organization of special protection circuits, which is necessary for fire safety and turns off the inverter in any emergency situation, for example, when the lamps are worn or depressurized. Often, to block a defect, it needs to be locked.
When diagnosing with the protection off, special precautions must be taken, because there is a risk of failure of the power elements of the inverter. After the diagnosis, it is imperative to restore the protection circuits for the inverter to operate normally.
When trying to repair the motherboard, you should first check the serviceability of linear stabilizers or power converters of microcircuits and, if necessary, update the software (software). In some cases, to repair the MB (SSB) board, it may be necessary to replace the chips - TA55709, DRV603, 24C08, Y4742, AO4801 with new or obviously working ones.
Owners and users of the SAMSUNG LE22B450 TV must remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to 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 LE22B450C8WXRU device:
Installed matrix (LCD-panel) T216HA01-DB (DD01).
To power the backlight, a converter is used, combined with a power supply unit, controlled by the SEM2105 PWM controller (16). A transformer TM-09208 is installed in the inverter converter. As power elements of the inverter, keys of type 4506GER (5) are used.
The necessary supply voltages for all nodes of the TV SAMSUNG LE22B450C8WXRU are formed by the power module BN44-00302A, or its analogs using Q0765R microcircuits.
MainBoard - the main board (motherboard) is a BN41-01228C module, using TA55709, DRV603, 24C08, DC-DC Y4742 (16), AO4801 (8) and other microcircuits.
Tuner DTX-8B / W12B5S BN40-00150A provides the reception of television programs and tuning to channels.