Technical description and composition of the SAMSUNG LE23R41B TV, panel type and applicable modules. The composition of the modules.SAMSUNG
Model: LE23R41B
Chassis / Version: RE23EO
Panel: V230W1-L02
T-CON: V230W1-C
Inverter (backlight): VIT70003.00 VIT70003.50
PWM Inverter: LM339A
MOSFET Inverter: FDS4559
Power Supply (PSU): BN96-01850E LCD23VFAX-E
PWM Power: L6561, FS7M0880, VIPer12A, MC33167, LM2576
MOSFET Power: STP20NM50
MainBoard: BN41-00545D BN94-00695C
IC MainBoard: M30620SPGP, SIL9993CTG100, MST9883CR-LF, 3F866BXZZ, MSP4410K, TPA3004D2, 24C32WP
Tuner: BN40-00051A
Specifications LE23R41B
SAMSUNG LE23R41B
General repair guidelines for TV LCD
Possible manifestations of defects
- SAMSUNG LE23R41B TV does not turn on at all. The control lights do not light or flash. The TV on the remote control and the control panel buttons do not respond.
With such manifestations, a malfunction is most likely to be detected in the BN96-01850E power module. Then it is necessary to measure its output voltages and, in case of their complete or partial absence, it is necessary to check the serviceability of power switches (STP20NM50) and rectifier diodes of converters for possible short circuit.
In the event of breakdowns in the secondary circuits of the converter, it can usually fail in short circuit mode, and in the event of a short circuit in the power elements of the primary circuit, the mains fuse or current sensor at the source of the key most often breaks.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, in the power supply circuit of a PWM controller, in frequency-setting or damping circuits, as well as in Negative Stabilization Feedback. PWM circuits (PWM) L6561, FS7M0880, VIPer12A, MC33167, LM2576 are usually checked by replacing with new, or obviously working.
- There is no image, but there is sound and reaction to the remote control. Or for a second, the image may appear immediately after switching on.
The 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 inverter. If all the electrolytic capacitors of the filter for the power supply of the inverter are working, make sure that the lamps are working, then you need to check the converter keys and the secondary windings of the transformers.
Sometimes, for diagnostic purposes, it is necessary to disable the inverter protection. In such cases, special care must be taken during work, and the protection circuits should be restored immediately after the repair is completed.
- The TV does not turn on, the indicator signals standby or working mode, or blinks.
Repair or diagnostics of the BN41-00545D 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 elements M30620SPGP, SIL9993CTG100, MST9883CR-LF, 3F866BXZZ, MSP4410K, TPA3004D2, 24C32WP requires the necessary training and professional skills in repairing modules at the component level. Problems associated with the use of BGA soldering technologies can sometimes be diagnosed by warming up.
In the absence of tuning to the channels of on-air or cable television, you should make sure that the software is correct, as well as in accordance with the ratings of the supply voltage at the terminals of the tuner BN40-00051A. It is also necessary to check the presence of pulses of data exchange between the tuner and the processor via the I2C bus using an oscilloscope.
It should be remembered! Attempts to self-repair a SAMSUNG LE23R41B 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!
The appearance of the MainBoard BN41-00545D is shown in the figure below:BN41-00545D
BN41-00545D can be used in TVs:
SAMSUNG LE32R51 LE32R51BM S (Panel LTA320W2-L14), SAMSUNG LE32R51B (Panel LTA320W2-L01), SAMSUNG LE26R51B LE26R51BM (Panel LTA260W2-L11), SAMSUNG LE40R51B LE40R51BX (SAMSUNG LE40 LB2011BG01LB201LB201LB2301 Panel LTA2G01 LE37R41B (Panel 1366x768 720p HD (LQ370T3LZ41 / LQ370T3LZ44)).
The appearance of the power supply
Main features of the SAMSUNG LE23R41B device:
Installed matrix (LCD panel) V230W1-L02.
The matrix control uses the Timing Controller (T-CON) V230W1-C.
The VIT70003.00 inverter is used to power the backlight lamps, it is controlled by the LM339A PWM controller. As power elements of the inverter, keys of the FDS4559 type are used.
The necessary supply voltages for all nodes of the SAMSUNG LE23R41B TV are generated by the BN96-01850E power module or its analogs using L6561, FS7M0880, VIPer12A, MC33167, LM2576 microchips and STP20NM50 type power switches.
MainBoard - the main board (motherboard) is a BN41-00545D module, using microcircuits M30620SPGP, SIL9993CTG100, MST9883CR-LF, 3F866BXZZ, MSP4410K, TPA3004D2, 24C32WP and others.
The tuner BN40-00051A provides the reception of television programs and tuning to channels.