Technical description and composition of the SAMSUNG LE55C650 TV, panel type and applicable modules. The composition of the modules.SAMSUNG
Model: LE55C650 LE55C650L1W
Chassis / Version: N84A
Panel: T546HW01 V.0
T-CON: T546HW01 V0 CTRL BD 54T01-C06
Inverter (backlight): V235-905 / 905HF + V235-905 / 915HF
Power Supply (PSU): BN44-00342A
PWM Power: LX6503AID
MOSFET Power: 16N50
MainBoard: BN41-01443A BN94-02625M
IC MainBoard: SDP92, WT61P802, K4T1G084QE, K4T51163QG, KFG8GH6U4M, sil9287BCNU
Tuner: BN40-00173A
Specifications LE55C650
SAMSUNG LE55C650
General repair guidelines for TV LCD
Possible manifestations of defects
- The SAMSUNG LE55C650 TV does not turn on, does not respond to the remote control and the control panel buttons, does not light up or blink indicators.
Failure in such cases should begin to be sought in the power supply circuits BN44-00342A. It is necessary to verify the presence of its output voltages and, if they are completely absent, check the power switches (16N50) and rectifier diodes for a probable short circuit.
In case of any breakdown of semiconductors in the secondary circuits, the converter can usually work normally in emergency short circuit mode. There are no output voltages. And during short circuit in the power elements of the primary circuit, as a rule, the mains fuse breaks and less often the current sensor at the source of the key.
Mos-Fet power switches, used in switching power supplies, sometimes fail due to a malfunction of any other elements that can put it out of operation in key mode or create an excess of the maximum permissible parameters of the switch. These can be elements supplying the PWM controller, frequency-setting or damping circuits, or negative feedback elements in the stabilization circuit. PWM controllers LX6503AID, in the absence of visible damage or frank short-circuit between the terminals, are checked by replacing with new, or obviously working.
- There is no image, but there is sound, it reacts to the remote control. Or the image appears when you turn on and immediately disappears
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.
Sometimes, for diagnostic purposes, it is necessary to disable the inverter protection. In such cases, special care must be taken during work, and the protection circuits should be restored immediately after the repair is completed.
- 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 BN41-01443A 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 SDP92, WT61P802, K4T1G084QE, K4T51163QG, KFG8GH6U4M, sil9287BCNU. 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.
Before changing the tuner BN40-00173A, if it is not possible to tune to television channels, make sure that there are supply voltages, which must be measured at the corresponding terminals of the tuner and checked for correctness. The pulses of the data exchange of the tuner with the processor can be controlled by an oscilloscope
Attention! Users and owners of LE55C650 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.
Service manual SAMSUNG LE55C650L1W - LE32C63*, LE37C63*, LE40C63*, LE46C63*, LE32C65*, LE37C65*, LE40C65*, LE46C65*, LE55C65*, LE32C67*, LE37C67*, LE40C67*, LE46C67*, LE55C67* Chassis N84A.
The appearance of the MainBoard BN41-01443A is shown in the figure below:
BN41-01443A
BN41-01443A can be used in TVs:
SAMSUNG LE40C630 LE40C630K1W (Panel LTF400HF16), SAMSUNG LE37C650L1W LE37C650 (Panel T370HW03 VH), SAMSUNG LE55C650 LE55C650L1W (Panel T546HW01 V.0).
Main features of the SAMSUNG LE55C650 device:
Installed matrix (LCD panel) T546HW01 V.0.
The matrix control uses the Timing Controller (T-CON) T546HW01.
To power the backlight used inverter V235-905.
The formation of the necessary supply voltages for all nodes of the SAMSUNG LE55C650 TV is carried out by the BN44-00342A power module, or its analogs using LX6503AID microcircuits and 16N50 type power switches.
MainBoard - the main board (motherboard) is a BN41-01443A module, using microchips SDP92, WT61P802, K4T1G084QE, K4T51163QG, KFG8GH6U4M, sil9287BCNU and others.
The tuner BN40-00173A provides the reception of television programs and tuning to channels.
