
Technical description and composition of the SAMSUNG LE32B450C7W TV, panel type and applicable modules. The composition of the modules.
SAMSUNG
Model: LE32B450C7W
Chassis / Version: N65A / N65B
Panel: LTF320AP06
Lamp backlight: 4 Lamp CCFL
T-CON: 320AP03C2L V0.1
Inverter (backlight): integrated into PSU
PWM Inverter: SEM2006
MOSFET Inverter: 4N60
Power Supply (PSU): BN44-00260C FSP118-3PI01
PWM Power: FAN7530 (PFC), ICE3BR0665J
MOSFET Power: 7N60
MainBoard: BN41-01165A BN94-02690H
IC MainBoard: CPU: SEMS12, DRAM: K4T511630G-HCE7, SPI Flash: 25L6405DMI-12G, NTP3200, MX25L6445D, WT61P8
Tuner: BN40-00137A DNOQ403SH151A
Appearance
SAMSUNG LE32B450C7W
General repair guidelines for TV LCD
Possible manifestations of defects
- SAMSUNG LE32B450C7W does not turn on, the indicators on the front panel do not light or flash. The TV does not respond to the control buttons and the remote control.
Failure in such cases should begin to be sought in the BN44-00260C power supply circuits. It is necessary to measure the output voltages in its secondary circuits, and if they are completely absent, check the serviceability of power switches (7N60) and rectifier diodes for possible breakdown (short circuit).
In case of any breakdowns in the secondary circuits, the converter can operate in emergency short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse or the current sensor at the source of the key often breaks.
The breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in the circuits supplying the PWM controller, frequency-setting or damper ones, as well as in the circuits of Negative Feedback (OOS) stabilization. PWM controllers (PWM) FAN7530 (PFC), ICE3BR0665J, if they do not have visible damage to the case and open fault between the terminals, are usually checked by replacement.
- There is no image, but there is sound, it reacts to the remote control. Or the image appears when you turn on and immediately disappears
These manifestations can be triggered by a power supply module, or by inverter defects, as well as a distortion of the currents in the lamps due to their uneven wear. If all the electrolytic capacitors of the filter according to the inverter power supply are serviceable, you should make sure that the lamps are in good working condition, then you need to check the converter keys and the secondary windings of the transformers.
If in diagnosing a malfunction, it is necessary to disable the inverter protection, there is a risk of failure of the power elements of the inverter, and special care is required during operations, and after their completion, it is necessary to restore the protection circuits for further safe operation of the TV by the owner in normal mode.
- The TV does not enter the operating mode, does not respond to the remote control. The indicator on the front panel lights up constantly or blinks.
Repair or diagnostics of the BN41-01165A motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, you should update or replace the software (software). In cases of attempts to repair the MB (SSB) board, it is necessary to check the health of its elements - CPU: SEMS12, DRAM: K4T511630G-HCE7, SPI Flash: 25L6405DMI-12G, NTP3200, MX25L6445D, WT61P8 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 BN40-00137A DNOQ403SH151A 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 power supply voltage levels and data exchange pulses with the processor via the I2C bus at the corresponding tuner pins.
Owners and users of the SAMSUNG LE32B450C7W TV should remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!SCHEMATICS: Samsung LE19B45***, LE22B45***, LE26B45***, LE32B45*** Chassis N65A, N65B.
PSU SCHEMATICS: BN44-00260C Power Supply schematic diagram.


BN41-01165A
BN41-01165A can be used in TVs:
SAMSUNG LE32B450C4 LE32B450C4W (Panel LTF320AP06), SAMSUNG LE37B530P7 LE37B530P7W (Panel AX094F040E), SAMSUNG LE40B530P7 LE40B530P7W (Panel LTF400HA08), SAMSUNG LE46B530P7 LE46B530P7W (Panel V460H1-L06 RevC1), SAMSUNG LE32B530 LE32B530P7W (Panel LTF320HA09), SAMSUNG LE40B531 LE40B531P7W (Panel LTF400HA08) .
The appearance of the power supply
Main features of the SAMSUNG LE32B450C7W device:
Installed matrix (LCD-panel) LTF320AP06.
The matrix control uses the Timing Controller (T-CON) 320AP03C2L.
To power the backlight, a converter is used, combined with a power supply, controlled by a PWM controller SEM2006. As power elements of the inverter, keys of type 4N60 are used.
The necessary supply voltages for all nodes of the SAMSUNG LE32B450C7W TV are generated by the BN44-00260C power module or its analogs using FAN7530 (PFC), ICE3BR0665J microcircuits and 7N60 type power switches.
MainBoard - the main board (motherboard) is a BN41-01165A module, using CPU chips: SEMS12, DRAM: K4T511630G-HCE7, SPI Flash: 25L6405DMI-12G, NTP3200, MX25L6445D, WT61P8 and others.
The tuner BN40-00137A DNOQ403SH151A provides the reception of television programs and tuning to channels.
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