Technical description and composition of the SAMSUNG LE32C550J1W TV, panel type and applicable modules. The composition of the modules.SAMSUNG
Model: LE32C550J1W LE32C550
Chassis / Version: Ver: SQ01
Panel: LTF320HM01
T-CON: F60MB4C2LV0.6
Inverter (backlight): SSI320_4UH01
PWM Inverter: SSI091ASN
MOSFET Inverter: AOD4186
Power Supply (PSU): BN44-00339A (P3237F1_ASM PSLF211401A)
PWM Power: FAN7530 (PFC), FSFR1800US, ICE3BR1765J (Stb)
MOSFET Power: 13NM60N
MainBoard: BN41-01331A BN94-03391A
IC MainBoard: WT61P802, SETD-70, K4T1G164QE-HCF8, KFG1G16U20K, NTP-7300S
Tuner: BN40-00173A DTOS40CVL081A
Control: IR: BN96-13451B (BN41-01382A)
Specifications LE32C550
SAMSUNG LE32C550J1W
General repair guidelines for TV LCD
Repair of the SAMSUNG LE32C550J1W LE32C550 TV should begin with a fault diagnosis, which involves a careful examination of the external and internal elements of the device. 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. Carbonized paint on the upper layer of resistors, electrolytic capacitors of rectifier filters swollen after boiling, cracked soldering at the terminals of heating elements or transformers can often suggest the cause of the defect and possible consequences.
In the absence of any signs of operability, when the SAMSUNG LE32C550J1W does not turn on and does not signal anything with the control lights on the panel, there is a possibility of a malfunction of the TV power supply module BN44-00339A (P3237F1_ASM PSLF211401A). It is advisable to start the troubleshooting of the power supply module by checking the state of the electrolytic capacitors of the rectifier filters and the mains fuse. Defective capacitors should be replaced. If the mains fuse is broken, it is necessary to check first of all the power semiconductor elements - rectifier diodes and 13NM60N transistors, which are often found in such a breakdown state in such situations.
It should be borne in mind that in the practice of repair it is extremely rare that key transistors in switching power supplies (SMPS) fail for no reason that should be sought by checking other components, for example, a breakdown of the key can provoke faulty elements of the damper circuits, or dried electrolytic capacitors or dangling primary resistors BP circuits involved in the stabilization process. In this case, all semiconductor elements of the strapping of the PWM regulator chip FAN7530 (PFC), FSFR1800US, ICE3BR1765J (Stb), which it is desirable to check by replacement, are subject to verification.
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 supplying the inverter should be checked. 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.
Repair of the motherboard BN41-01331A BN94-03391A must begin with the diagnosis and verification of all linear stabilizers and power converters of its microcircuits. Sometimes it may be necessary to update the software (software) - flashing FLASH or EEPROM. In some cases, to repair the MB (SSB) board, it may be necessary to replace the chips - WT61P802, SETD-70, K4T1G164QE-HCF8, KFG1G16U20K, NTP-7300S with new or obviously working ones. In cases where BGA technologies are used, defects are usually localized by the heating method.
If you suspect a malfunction of the BN40-00173A DTOS40CVL081A tuner, first of all, you need to verify the correctness of the software, as well as the presence of the necessary voltage levels and data exchange pulses with the processor via the I2C bus on the corresponding tuner pins.
Once again, we remind TV users: you should not make attempts to repair it yourself without the appropriate knowledge, experience and the necessary qualifications! Trust the repair only to professionals with sufficient experience in the field of repair of electronic equipment.
SCHEMATICS ----> Samsung Chassis N82A.
FOR MODELS Samsung LE32C53***, LE37C53***, LE40C53***, LE46C53***, LE32C57***, LE37C57***, LE40C57***, LE46C57***, LE32C55***, LE37C55***, LE40C55***, LE46C55***, LE26C45***, LE32C45***.
PSU SCHEMATISC: BN44-00339A.
The appearance of the MainBoard BN41-01331A is shown in the figure below:BN41-01331A
BN41-01331A can be used in TVs:
SAMSUNG LE32C550J1W LE32C550 (Panel LTF320HM01), SAMSUNG LE46C530F1W LE46C530 (Panel LFT400HM01).
The appearance of the power supply
Main features of the SAMSUNG LE32C550J1W device:
Installed matrix (LCD panel) LTF320HM01.
The matrix control uses the Timing Controller (T-CON) F60MB4C2LV0.6.
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 LE32C550J1W TV are generated by the BN44-00339A power supply module or its analogs using FAN7530 (PFC), FSFR1800US, ICE3BR1765J (Stb) microcircuits and 13NM60N type power switches.
MainBoard - the main board (motherboard) is a BN41-01331A module, using microchips WT61P802, SETD-70, K4T1G164QE-HCF8, KFG1G16U20K, NTP-7300S and others.
The tuner BN40-00173A DTOS40CVL081A 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