Technical description and composition of the SAMSUNG LE32D550K1W TV, panel type and applicable modules. The composition of the modules.SAMSUNG
Model: LE32D550K1W
Panel: LTF320HM01
T-CON: F60MB4C2L V0.6
Inverter (backlight): SSI320-4UH01
PWM Inverter: SSI091ASN
MOSFET Inverter: AOD4186
Power Supply (PSU): BN44-00339B
PWM Power: FSFR1700US (PWM resonant), FAN7530 (PFC), STR-A6052 (Standby)
MOSFET Power: SD10N60
MainBoard: BN41-01536B
IC MainBoard: WT61P802, SEMS18, LVC244A, LVC245A, NTP-7300S, DRV604, Z1031AI, FDS443
Tuner: BN40-00202A
Control: IR: BN96-16729F (BN41-01600A)
Specifications LE32D550
SAMSUNG LE32D550K1W
General repair guidelines for TV LCD
Diagnostics of malfunctions and repairs SAMSUNG LE32D550K1W, as well as other electronic devices, it is recommended to start with an external examination of the external and internal elements. According to some external signs of a change in the state of some elements, it is sometimes possible to make assumptions about the nature of the defect, as well as determine the further direction of the troubleshooting. 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 signs of certain malfunctions.
A malfunction of the power supply is often manifested corny - the TV does not turn on, does not make any sounds, does not light up and does not blink with any indicators. When diagnosing and repairing the power supply, after replacing the swollen capacitors of the filters of the secondary rectifiers (if any), you must first check the mains fuse. When it is broken, the power elements of the SD10N60 transistors and rectifier bridge diodes should be checked for avalanche (thermal) breakdown.
In most cases, key breakdowns in switching power supplies (SMPS) do not occur for no reason and you should look for other faulty circuit elements that could provoke a defect. This can be dried electrolytic capacitors in the primary circuit, and faulty damper elements, as well as dangling resistors or punched semiconductor elements in the stabilization circuits. Possible defective PWM FSFR1700US (PWM resonant), FAN7530 (PFC), STR-A6052 (Standby) chips from the manufacturer.
If the SAMSUNG LE32D550K1W does not have an image, but there is sound and the TV is controlled from the remote control, a malfunction in the display backlight nodes is likely. Lamps or power converter - inverter may be faulty. Often in such cases, when you turn on the TV, an image appears and immediately disappears. First of all, it is necessary to verify the operability of the electrolytic capacitors of the rectifier filter supplying the inverter, and check the LCD lamps by connecting external and obviously serviceable for diagnosis to the connectors. Turning off the protection for diagnostic purposes, it must be remembered that in this case there is a risk of failure of the power elements of the inverter. Upon completion of the diagnosis, all regular protection circuits should be restored.
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 cases of attempts to repair the MB board (SSB), it is necessary to check the health of its elements - WT61P802, SEMS18, LVC244A, LVC245A, NTP-7300S, DRV604, Z1031AI, FDS443 which may require replacement with new ones. If the BGA processor is installed, there is a possibility of a violation of the soldering of the contacts of its conclusions with the board (it is diagnosed by heating).
If a tuner BN40-00202A is suspected of malfunction, first of all, it is necessary to verify the correctness of the software, as well as the presence of the necessary supply voltage levels and data exchange pulses with the processor via the I2C bus on the corresponding tuner pins.
It is necessary to remember to users that attempts to independently repair a SAMSUNG LE32D550K1W TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!
PSU SCHEMATIC Samsung BN44-00339B Power supply.
LE32D550K1W CHASSIS NH01:
Panel: V315H3-L02; Main: BN94-04844Z BN41-01603C; T-con: V460HJ1-C01; Inverter: CM32T_BHS
The appearance of the MainBoard BN41-01536B is shown in the figure below:
BN41-01536B
BN41-01536B can be used in TVs:
SAMSUNG LE32C450E1 LE32C450E1W (Panel LTF320AP08), SAMSUNG LE32C530F1 LE32C530F1W (Panel LTF320HM01), SAMSUNG LE40C530F1W (Panel LTF400HM01), SAMSUNG LE32D550K1WM LTF3.
The appearance of the power supply
Main features of the SAMSUNG LE32D550K1W device:
Installed matrix (LCD panel) LTF320HM01.
The matrix control uses the Timing Controller (T-CON) F60MB4C2L.
The SSI320-4UH01 inverter is used to power the backlight, controlled by the SSI091ASN PWM controller. As power elements of the inverter, keys of the AOD4186 type are used.
The necessary supply voltages for all nodes of the SAMSUNG LE32D550K1W television are generated by the BN44-00339B power supply module or its analogs using the FSFR1700US (PWM resonant), FAN7530 (PFC), STR-A6052 (Standby) microcircuits and power switches of the SD10N60 type.
MainBoard - the main board (motherboard) is a BN41-01536B module, using microchips WT61P802, SEMS18, LVC244A, LVC245A, NTP-7300S, DRV604, Z1031AI, FDS443 and others.
The tuner BN40-00202A provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTF320HM01
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1920x1080, FHD
Display Mode: S-PVA, Normally Black, Transmissive
Active Area: 698.4x392.85 mm
Surface: Antiglare (Haze 7%), Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 4000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 8 (G to G)
Frequency: 60Hz
Lamp Type: 4 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (2 ch, 8-bit), 51 pins
Voltage: 12.0V