SAMSUNG UE42F5300AK Chassis / Version: U85A // Ver. AS01

abdulwaheed33

SAMSUNG LED  
Model:  UE42F5300AK

Chassis / Version:  U85A // Ver.  AS01

Panel:  CY-HF420BGAV1V // HF420BGA-B1

LED backlight:  2013SVS42F_L_9, 2013SVS42F_R_5 Rev1.8 130103

T-CON:  // 50T11-C02 T500HVN05.0 Ctrl BD

LED driver (backlight):  integrated into PSU;  136 / 182V 280mA, 147 / 195V 280mA

PWM LED driver:  MAP3312B

MOSFET LED driver:  AOD9N40, AOD5N40

Power Supply (PSU):  BN44-00645A L42S1_DSM\\

PWM Power:  SEM3110A

MOSFET Power:  STD14NM50N, STF13NM60 (PFC)

MainBoard:  BN41-01958B BN94-06774U // BN41-01958A

IC MainBoard:  K4B2G1646E, KLM4G1FE3B, 25Q40, 25Q40, WT61P807, TAS5745

Tuner:  BN40-00262B CT2CX-3S / K3S

Control:  Remote: AA59-00582A, IR: BN96-26411J (BN41-01976B)

General recommendations for repairing TV LCD LED

In case the UE42F5300AK does not turn on, it does not respond to the panel and the front panel buttons, does not blink the lights and does not show any signs of operability, possibly in this case the power module BN44-00645A L42S1_DSM is faulty.  First of all it is necessary to replace the swollen capacitors of rectifier filters, if any.  If a mains fuse is disconnected in the power supply, in most cases a breakdown of the power key (s) is detected, which can be integrated with the The PWM controller, or a separate FET can be used.  Also checks the diodes of the rectifier bridge and the electrolytic capacitor of the network rectifier filter.

LED-panel backlight driver will perform as a converter of type Step-Up-Converter and placed on one board with the power module.

If there is no image when the SAMSUNG UE42F5300AK is turned on, or it appears and disappears immediately, but there is a sound, most likely a malfunction in the LED lighting circuit of the CY-HF420BGAV1V panel, or in the node of the LED driver .  
the in  Case of Breaks in The catena alberghiera of LEDs ON The  Board 2013SVS42F  , IT IS Necessary to Completely the disassemble The Panel, Check The LEDs for AN Open, AS Well AS The Reliability of The Connections in The Connectors and The pins of The pins of The Connectors.  
A break in the line of LEDs connected in series can not be detected with a multimeter or tester without disassembling the panel.  To open all the transitions, several dozen volts are needed, and it is best to use a current source for such purposes .

The repair or diagnostics of the motherboard BN41-01958B BN94-06774U should begin with a check of the stabilizers and power converters needed to power all  MainBoard  chips   and the panel.  If necessary, update the software (software).  
In cases of complex repairs of MB (SSB) and with the necessary skills and equipment, it may sometimes be necessary to replace its K4B2G1646E, KLM4G1FE3B, 25Q40, 25Q40, WT61P807, TAS5745 and other possible faulty components.  Malfunctions associated with the use of BGA soldering techniques are usually only diagnosed by The warm-up method.
The tuner fault BN40-00262B CT2CX-3S / K3S is installed after checking the software and all the supply voltages at its terminals. Also, before replacing the tuner, you need to make sure with the oscilloscope that there is data exchange between the tuner and the processor.

For owners of the TV UE42F5300AK, we recommend that you only use qualified personnel with experience to repair!  Attempts to repair yourself without proper knowledge and skills can lead to serious negative consequences!.................................................................................................................................

Download: Service manual and Power supply schematic diagram and firmware of SPI FLASH EEPROM

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