Technical description and composition of the SAMSUNG LE22C350 TV, panel type and applicable modules. The composition of the modules.SAMSUNG
Model: LE22C350 LE22C350D1W
Chassis / Version: N89A
Panel: T216HA01-DB
Lamp backlight: 4 LAMP CCFL
T-CON: V216B1-XC01 V216B1-P04
Inverter (backlight): integrated into PSU; 600V 9mA
PWM Inverter: OZ9910BGN
Power Supply (PSU): BN44-00366B K02P140.00 H22HD_AAP
PWM Power: DM0465R
MainBoard: BN41-01333B
IC MainBoard: CPU: SETD-10, SPI Flash: MX25L4005A
Tuner: BN40-00173A
Specifications LE22C350
SAMSUNG LE22C350
General repair guidelines for TV LCD
Possible manifestations of defects
- SAMSUNG LE22C350 does not turn on, the indicators on the front panel do not light or flash. The TV does not respond to the control buttons and the remote control.
With such manifestations, the BN44-00366B power module usually fails. It is necessary to measure its output voltages, and in case of their absence, check the operability of the power switches of the converters and rectifier diodes for the probability of a short circuit.
In case of breakdowns of diodes in the secondary circuits, the converter can operate in emergency short circuit mode without output voltages, and during short circuit in the power elements of the primary circuit, the mains fuse and / or current sensor at the source of the key usually breaks.
Mos-Fet keys used in switching power supplies usually fail 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. These can be circuits supplying the PWM controller, damping or frequency-setting circuits, or elements of OOS (negative feedback) in the stabilization circuit. PWM controllers (PWM) DM0465R, in the absence of external damage and short circuit between the terminals, are checked by replacing with obviously good ones.
- There is no image, but there is sound and reaction to the remote control. Or for a second, the image may appear immediately after switching on.
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. If all the electrolytic capacitors of the filter according to the inverter power supply are serviceable, you should make sure that the lamps are in good working condition, then you need to check the converter keys and the secondary windings of the transformers.
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 turn on, does not respond to the remote control. The indicator blinks or signals standby mode.
Repair or diagnostics of the BN41-01538A 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). When repairing an MB board, you need to check its components WT61P802, KFG1G16U2D, ATMLH034-2ECL (24C256), NTP-7300S. Defective items should be replaced. If chips with BGA soldering technology are used, a problem in its implementation is detected by the local heating of the chip.
Attention! Users and owners of LE22C350 TVs who do not have the appropriate qualifications, knowledge and experience are strongly discouraged from attempting self-repair in order to avoid negative consequences that could lead to complete non-repairability of the device.
The appearance of the MainBoard BN41-01333B is shown in the figure below:
BN41-01333B
The appearance of the power supply
Main features of the SAMSUNG LE22C350 device:
Installed matrix (LCD panel) T216HA01-DB.
The matrix control uses the Timing Controller (T-CON) V216B1-XC01.
To power the backlight, a converter is used, combined with a power supply, controlled by the OZ9910BGN PWM controller.
The formation of the necessary supply voltages for all nodes of the SAMSUNG LE22C350 TV is carried out by the BN44-00366B power module, or its analogs using DM0465R microcircuits.
MainBoard - the main board (motherboard) is a BN41-01333B module, using CPU chips: SETD-10, SPI Flash: MX25L4005A and others.
The tuner BN40-00173A provides the reception of television programs and tuning to channels.