SAMSUNG
Model: LE32B531 LE32B531P7W
Chassis / Version: N65A
Panel: LTF320HA09
T-CON: 320HAC2LV.4
Inverter (backlight): integrated into PSU
PWM Inverter: BD9893F
MOSFET Inverter: 2SK3561
Trans Inverter: QGAH02094
Power Supply (PSU): BN44-00261B H32F1_9DY
PWM Power: FAN7530, STR-W6252, A358F
MOSFET Power: FDPF5N50UT
MainBoard: BN41-01165B BN94-03132S
IC MainBoard: CPU: SEMS12, DRAM: K4T511630G-HCE7, SPI Flash: 25L6405DMI-12G, Eeprom 24C64, Weltrend: WT61P8, Audio: NTP3200
Tuner: BN40-00137A
Specifications LE32B531
SAMSUNG LE32B531
General repair guidelines for TV LCD
Possible malfunctions
- SAMSUNG LE32B531 does not turn on. There are no signs of operability. The indicators on the front panel do not light or flash, the TV does not respond to the remote control and control buttons.
Often in such cases, the BN44-00261B power module is faulty. It is then necessary to measure its output voltages and, if they are absent, you should check the power switches (FDPF5N50UT) and the rectifier diodes of the converters for a short circuit probability.
In case of breakdowns of semiconductors in the secondary circuits of any converter, as a rule, it can operate in emergency short-circuit mode without output voltages, and during short circuit in the elements of the primary circuit, the mains fuse and, less often, the current sensor at the source of the key are most often cut off.
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, STR-W6252, A358F, if they do not have visible damage to the case and open short circuit between the terminals, are usually checked by replacement.
- There is no image, there is sound, there is a reaction to the remote control. Or immediately after turning on for a second, the image may appear and immediately disappear.
A defect can be caused by problems in the nodes or elements of the backlight of the display, or in the power supply of the lamps or the inverter.After checking all the electrolytic capacitors of the filters that are involved in the power supply of the inverter, the breakdown keys and the transformer secondary windings must be ringed in its converter.
Sometimes, for diagnostic purposes, inverter protection must be disabled. In such cases, special care must be taken during work, and the protection circuits should be restored immediately after the repair is completed.
- The indicator on the front panel blinks, the TV does not turn on in the operating mode, it does not respond to the remote control.
Repair or diagnostics of the BN41-01165B 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). Complex repair of MB (SSB) is possible only in the conditions of a service center with the necessary equipment. Checking or replacing CPU elements: SEMS12, DRAM: K4T511630G-HCE7, SPI Flash: 25L6405DMI-12G, Eeprom 24C64, Weltrend: WT61P8, Audio: NTP3200 requires the necessary training and professional skills to repair modules at the component level. Problems associated with the use of BGA soldering technologies can sometimes be diagnosed by warming up.
If you suspect a malfunction of the BN40-00137A tuner, first of all, you need to verify the correctness of the software, as well as the presence of the necessary voltage levels and pulses of data exchange with the processor via the I2C bus at the corresponding terminals of the tuner.
It should be remembered! Attempts to self-repair a SAMSUNG LE32B531 TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!
SCHEMATICS: Samsung LE32B531P7W Chassis N65A.
MODELS: LE32B53***, LE37B53***, LE40B53***, LE46B53***.
FIRMWARE Weltrend WT61P8 SAMSUNG LE32B530 LE32B530P7W , Main: BN41-01165A.
PSU SCHEMATICS: Samsung BN44-00261B Power supply.
The appearance of the MainBoard BN41-01165B is shown in the figure below:BN41-01165B
BN41-01165B can be used in TVs:
SAMSUNG LE37B530P7 LE37B530P7W (Panel AX094F040E), SAMSUNG LE32B530 LE32B530P7W (Panel LTF320HA09), SAMSUNG LE32B531 LE32B531P7W (Panel LTF320HA09), SAMSUNG LE26B4504WW4 V. V. 4.
The appearance of the power supply
Main features of the SAMSUNG LE32B531 device:
Installed matrix (LCD-panel) LTF320HA09.
The matrix control uses the Timing Controller (T-CON) 320HAC2LV.4.
To power the backlight, a converter is used, combined with a power supply, controlled by the BD9893F PWM controller. A transformer QGAH02094 is installed in the inverter converter. As power elements of the inverter, keys of type 2SK3561 are used.
The necessary supply voltages for all nodes of the SAMSUNG LE32B531 TV are generated by the BN44-00261B power module or its analogs using FAN7530, STR-W6252, A358F microcircuits and FDPF5N50UT power switches.
MainBoard - the main board (motherboard) is a BN41-01165B module using CPU chips: SEMS12, DRAM: K4T511630G-HCE7, SPI Flash: 25L6405DMI-12G, Eeprom 24C64, Weltrend: WT61P8, Audio: NTP3200 and others.
The tuner BN40-00137A provides the reception of television programs and tuning to channels.
