Technical description and composition of the SAMSUNG LE32A556P1 TV, panel type and applicable modules. The composition of the modules.SAMSUNG
Model: LE32A556P1 LE32A556P1F
Chassis / Version: GPR32SEN
Panel: LTF320HA01 A04 // LTF320HA03
T-CON: 320HAC2LV0.0 THP9301
Inverter (backlight): SSI320-16B01 Rev0.3
PWM Inverter: OZ9968SN
Trans Inverter: LT-3216
Power Supply (PSU): BN44-00208A
PWM Power: MC33067P, FAN7530 (PFC), FSQ0365RN (Standby)
MOSFET Power: 9N50, 11N60 (PFC)
MainBoard: BN41-00974B BN94-01656E // BN41-00974B BN94-02189A MT8226
IC MainBoard: MT8226, MT8291E, NTP-3100, WT61P8, SDP72, D61211GM, HYB25DC256163CE-4, K4T56163QT, TMDS351
Tuner: TDHG6-K10A BN40-00120A
Specifications LE32A556P1
SAMSUNG LE32A556P1
General repair guidelines for TV LCD
SAMSUNG LE32A556P1 TV, like any other, it is advisable to start repairing with an inspection of internal and external elements. Specific external damage can sometimes prompt further actions to determine the malfunction of the TV and localization of the defect before the necessary measurements and waveforms are taken. In some cases, faulty elements are visible to the naked eye, for example, charred resistors or swollen metal-ceramic capacitors, or electrolytic in rectifier filters. Ring cracks formed in the soldering of the terminals of transformers or heating elements of the circuit are also frequent sources of many malfunctions with a variety of external manifestations.
If the TV does not turn on, no indicators on its front panel are lit or blinking. Also, if the TV does not respond to the remote control and buttons, does not make any sounds or any signs of operability when it is turned on, there is a certain probability that the BN44-00208A power supply module is defective and needs repair. Sometimes with similar manifestations, a problem can only occur in the absence of processor power, but this happens much less often. In this case, the diagnosis and repair of the common power supply should always be started by checking the mains fuse. When it is broken, it is advisable to check for a breakdown, first of all, all power semiconductor elements of the converter and the rectifier diode bridge of the network, as well as the large electrolytic capacitor of the filter of the network rectifier and the key transistor.
If a breakdown of the power switch of the flyback converter of the power supply unit is detected, it should be remembered that it does not fail for no reason, which should be sought by checking other elements of the primary circuit - electrolytic capacitors, a PWM controller that can only be checked by replacement, as well as others semiconductor elements (diodes, transistors, zener diodes).
In cases using a power module with an active KKM, troubleshooting is sometimes somewhat more complicated.
In cases where the SAMSUNG LE32A556P1 TV has lost its image, and the sound is there and all other functions are operational, there is a possibility of an inverter (converter for powering the backlight) failure. When you turn on the TV, the image may appear briefly and immediately disappear. It should be borne in mind that with such manifestations, the lamps themselves also fail, the malfunction of which can be detected by replacement, by connecting to the connectors for diagnostics that are known to be serviceable and suitable in power.
When repairing the SSI320-16B01 Rev0.3 inverter, it is often necessary to disable the protection for diagnostics, which, for the purpose of fire safety, turns it off in any emergency situation, for example, during a malfunction or uneven wear of the lamps, which makes it difficult to find a defect.
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 BN41-00974B or BN94-01656E must begin with the diagnosis and verification of all linear stabilizers or power converters of its microcircuits. Sometimes it may be necessary to update the software (software) - flashing FLASH or EEPROM.
Owners of the LE32A556P1 TV are recommended to repair only qualified specialists with experience! Self-repair attempts without the appropriate knowledge and skills can lead to serious negative consequences!
Download: Service manual and diagram: Samsung LE32A55*P, LE37A55*P, LE40A55*P, LE46A55*P, LE52A55*P Chassis GPR32SEN, GPR37SEN, GPR40SEN, GPR46SEN, GPR52SEN.
SUPPLY: BN44-00208A.
The appearance of the MainBoard BN41-00974B is shown in the figure below:BN41-00974B
BN41-00974B can be used in TVs:
SAMSUNG LE32A556P1 LE32A556P1F (Panel LTF320HA01 A04), SAMSUNG LE37A552 LE37A552P3R (Panel T370HW02 V.4), SAMSUNG LE37A656A1 LE37A656A1FXRU (Panel T370HW02 V6), SAMSUNG LE32A558P3F (Panel LTF320HA01), SAMSUNG LE40A656A1F (Panel LTF400HC01 A02), SAMSUNG LE37A615A3F LE37A615 (Panel T370HW02 V.4), SAMSUNG LE40A556P1F (Panel V400H1-L03 REV C1), SAMSUNG LE40A558P3F LE40A558 (Panel LTF400HA03), SAMSUNG LE32A656A1F (Panel LTF320HA04).
PSU Advanced
The power module BN44-00208A is made using a Power Factor Correction (PFC) scheme to eliminate multiple AC harmonics introduced into the power supply by the device. The PFC assembly is a Step-Up Converter based on a FAN7530 PWM controller that evenly distributes high-frequency impulses of the charging current of the electrolytic capacitor of the rectifier filter of the mains voltage over a period of 50 Hz. The current of its charge in this case will already be determined not by its reactance (usually 10-30 ohms for the network frequency), but by the elements of the converter. As a result, a change in the amplitude of the pulses (envelope) of the consumed current of the converter will repeat the shape and phase of the input sinusoidal voltage. The availability of the increased voltage (about + 380V) in the operating mode on the capacitor of the line filter indicates the serviceability of the PFC node.
The appearance of the power supply
Main features of the SAMSUNG LE32A556P1 device:
Installed matrix (LCD panel) LTF320HA01 A04 or LTF320HA03.
The matrix control uses the Timing Controller (T-CON) 320HAC2LV0.0.
To power the backlight, an SSI320-16B01 inverter is used, it is controlled by the OZ9968SN PWM controller. A transformer LT-3216 is installed in the inverter converter.
The necessary supply voltages for all nodes of the SAMSUNG LE32A556P1 TV are generated by the BN44-00208A power supply module or its analogs using microcircuits MC33067P, FAN7530 (PFC), FSQ0365RN (Standby) and power switches of the type 9N50, 11N60 (PFC).
MainBoard - the main board (motherboard) is a BN41-00974B module, using the chips MT8226, MT8291E, NTP-3100, WT61P8, SDP72, D61211GM, HYB25DC256163CE-4, K4T56163QT, TMDS351 and others.
Tuner TDHG6-K10A BN40-00120A provides the reception of television programs and tuning to channels.
Information from an alternative source:
SAMSUNG LE32A556P1F Chassis GPR32SEN
Panel Type (Matrix): LTF320HA01
Motherboard: BN94-01656E BN41-00974B, SEMT01, S4LF136X01 - SDP72, UPD61211GM, HYB25DC256163CE-4, Tuner: BN40-00120A,
T-con: 320HAC2LV0.0, LMU4142T1, EM638325TS-7G
Invertor: SSI320_16B01, OZ9966SN, A393F,
PSU: BN44-00208A, MC33067P, FAN7530, FSQ0365
Remote control: BN59-00683A Schematic BN44-00208A
