Technical description and composition of the SAMSUNG LE32B350F1 TV, panel type and applicable modules. The composition of the modules.
SAMSUNG
Model: LE32B350F1
Chassis / Version: SURVIVAL
Panel: LTF320AP06 A16
T-CON: 320AP03C2LV0.2 TPS65160A LMX6322T1 AG32AE2
Inverter (backlight): integrated into PSU
PWM Inverter: OZ9938GN
MOSFET Inverter: AP4506GEH
Trans Inverter: QGAH02107, works but darker (QGAH02094)
Power Supply (PSU): BN44-00289A Rev1.5 - HV32HD_9DY
PWM Power: FAN7530 (PFC), ICE3BR1065JF
MOSFET Power: STP9NK50ZFP (PFC)
MainBoard: BN41-01207C SURVIVAL
IC MainBoard: CPU: SEMS12; DRAM: K4T511630G-HCE7; SPI Flash: MX25L6405DMI-12G; EEPROM: 24C1024
Tuner: BN94-08169J
Specifications LE32B350
SAMSUNG LE32B350F1
General repair guidelines for TV LCD
Like any other TV, SAMSUNG LE32B350F1 repair is advisable to start with a careful examination of the external and internal elements. Many changes visible to the naked eye make it possible to determine the future direction of troubleshooting and localization of the defect. In most cases, the repairman can guess the causes of the defect and possible consequences by the characteristic signs of typical TV defects, for example, ring cracks formed in the soldering of element outputs, swollen rectifier filter capacitors, charred resistors and other circuit elements.
In cases where the SAMSUNG LE32B350F1 TV does not turn on, does not respond to the remote control and buttons, no indicators on the front panel light up or blink, and there are no sounds and no signs of operability when turning on, the HV32HD_9DY BN44-00289A Rev1 power supply module is most likely to be faulty .5 or, which is much less common, there is no power to the processor on the motherboard. When diagnosing and repairing the power supply, first of all, it is necessary to check the fuse and, if it is broken, it is necessary to identify the cause. Often in such cases, an avalanche (thermal) breakdown is detected in the power semiconductor elements of the module - rectifier diodes or power key.
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 the circuitry of the SAMSUNG LE32B350F1 TV, a single power supply and inverter are used, which are combined into one common module BN44-00289A. With such a circuit design of the module, there is no possibility of a separate replacement of the inverter, but when repairing at a component level, there are usually no significant difficulties in diagnosing and localizing a defect.
If there is no image when you turn on the SAMSUNG LE32B350F1, or it appears for a second and disappears completely, but there is sound, most likely either the backlight or their power converter (inverter) are faulty. It is necessary to check the electrolytic capacitors of the filter of the secondary rectifiers in the general power supply unit.
Often, attempts to repair the HV32HD_9DY BN44-00289A Rev1.5 inverter are hampered by the fact that the diagnosis of the malfunction is complicated by the operation of its protection, which is designed to turn off the inverter in emergency conditions - when the lamps are depressurized, breaks or short circuits in high-voltage connections and other emergency situations. Lock protection to localize the defect is popular among repairmen.
In such cases, special care should be taken during diagnosis, and after completion of all repair work, it is necessary to restore the circuit and the inverter protection for further safe operation of the TV.
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).
Remember! Attempts to self-repair by users of the SAMSUNG LE32B350F1 TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!
SCHEMATICS: Samsung LE26B35***, LE32B35*** Chassis N76A
PSU DIAGRAM : BN44-00289A.
The rear view of the MainBoard BN41-01207C is shown in the figure below:BN41-01207C
BN41-01207C can be used in TVs:
SAMSUNG LE26B350F1WXRU (Panel T260XW02 V.S), SAMSUNG LE32B350F1W (Panel LTF320AP06), SAMSUNG LE32B350F1 (Panel LTF320AP06 A16).
PSU Advanced
The LE32B350F1 TV is equipped with a BN44-00289A power module using the PFC (Power Factor Correction) scheme acting as an active filter to eliminate the higher harmonic components of the current consumption. The boost converter based on the FAN7530 PWM controller does not allow the electrolytic capacitor of the input rectifier filter to be connected to the network directly through open diodes, when the reactance (about 15-30 ohms at a frequency of 50 Hz) determines the charge current. As a result of the conversion, the charging current of the capacitor will be determined in such a way that the envelope of the high-frequency pulses of the input current will repeat the phase and shape of the sine wave of the input voltage. The health check of the PFC unit is carried out by measuring the DC voltage on the capacitor of the rectifier network. In operating mode, it should be around 380V, in standby approximately 300V.
Main features of the SAMSUNG LE32B350F1 device:
Installed matrix (LCD-panel) LTF320AP06 A16.
The matrix control uses the Timing Controller (T-CON) 320AP03C2LV0.2.
To power the backlight, a converter is used, combined with a power supply, controlled by the OZ9938GN PWM controller. The transformer QGAH02107 is installed in the inverter converter, it works but is darker (QGAH02094). As power elements of the inverter, keys of the AP4506GEH type are used.
The necessary supply voltages for all nodes of the SAMSUNG LE32B350F1 TV are generated by the BN44-00289A power supply module or its analogs using FAN7530 (PFC), ICE3BR1065JF microchips and power switches of the STP9NK50ZFP (PFC) type.
MainBoard - the main board (motherboard) is a BN41-01207C module, using CPU chips: SEMS12; DRAM: K4T511630G-HCE7; SPI Flash: MX25L6405DMI-12G; EEPROM: 24C1024 and others.
The tuner BN94-08169J provides reception of television programs and tuning to channels.
Information from an alternative source:
SAMSUNG LE32B350F1W Chassis N76A
Panel Type (Matrix): LTF320AP06,
Motherboard: BN41-01207C BN94-03159J, K4T511630G-HCE7, Tuner: DTX-8B / W12B5S BN40-00150A
T-con: 320AP03C2LV0.2, LMX6332T1, EM638325TS-7G, TOUCH KEY: BN41-01249A BN96-11598B
PSU & Invertor: BN44-00289A HV32HD_9DY, Tr-r: TI801 TI802 - QGAH02107
Remote control: BN59-00942A Schematic BN44-00289A
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTF320AP06
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: PVA, Normally Black, Transmissive
Active Area: 697.68x392.26 mm
Surface: Antiglare (Haze 7%), Hard coating (3H)
Brightness: 450 cd / m²
Contrast Ratio: 5000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 8 (G to G)
Frequency: 60Hz
Lamp Type: 4 pcs CCFL Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
